CosmosDB.psm1

<#
.EXTERNALHELP CosmosDB-help.xml
#>

#Requires -Version 5.1
#Requires -Modules @{ ModuleName = 'Az.Accounts'; ModuleVersion = '1.0.0'; Guid = '17a2feff-488b-47f9-8729-e2cec094624c' }
#Requires -Modules @{ ModuleName = 'Az.Resources'; ModuleVersion = '1.0.0'; Guid = '48bb344d-4c24-441e-8ea0-589947784700' }

$moduleRoot = Split-Path `
    -Path $MyInvocation.MyCommand.Path `
    -Parent

# Import dependent Az modules
Import-Module -Name Az.Accounts -MinimumVersion 1.0.0 -Scope Global
Import-Module -Name Az.Resources -MinimumVersion 1.0.0 -Scope Global

#region Types
if (-not ([System.Management.Automation.PSTypeName]'CosmosDB.Context').Type)
{
    $typeDefinition = @'
namespace CosmosDB {
    public class ContextToken
    {
        public System.String Resource;
        public System.DateTime TimeStamp;
        public System.DateTime Expires;
        public System.Security.SecureString Token;
    }
 
    public class BackoffPolicy
    {
        public System.Int32 MaxRetries;
        public System.String Method;
        public System.Int32 Delay;
    }
 
    public class Context
    {
        public System.String Account;
        public System.String Database;
        public System.Security.SecureString Key;
        public System.String KeyType;
        public System.String BaseUri;
        public CosmosDB.ContextToken[] Token;
        public CosmosDB.BackoffPolicy BackoffPolicy;
    }
 
    namespace IndexingPolicy {
        namespace Path {
            public class Index {
                public System.String dataType;
                public System.String kind;
            }
 
            public class IndexRange : CosmosDB.IndexingPolicy.Path.Index {
                public System.Int32 precision;
            }
 
            public class IndexHash : CosmosDB.IndexingPolicy.Path.Index {
                public System.Int32 precision;
            }
 
            public class IndexSpatial : CosmosDB.IndexingPolicy.Path.Index {
            }
 
            public class IncludedPath
            {
                public System.String path;
                public CosmosDB.IndexingPolicy.Path.Index[] indexes;
            }
 
            public class ExcludedPath
            {
                public System.String path;
            }
        }
 
        public class Policy
        {
            public System.Boolean automatic;
            public System.String indexingMode;
            public CosmosDB.IndexingPolicy.Path.IncludedPath[] includedPaths;
            public CosmosDB.IndexingPolicy.Path.ExcludedPath[] excludedPaths;
        }
    }
 
    namespace UniqueKeyPolicy {
        public class UniqueKey {
            public System.String[] paths;
        }
 
        public class Policy
        {
            public CosmosDB.UniqueKeyPolicy.UniqueKey[] uniqueKeys;
        }
    }
}
'@

    Add-Type -TypeDefinition $typeDefinition
}

<#
    This type is available in PowerShell Core, but it is not available in
    Windows PowerShell. It is needed to check the exception type within the
    Invoke-CosmosDbRequest function.
#>

if (-not ([System.Management.Automation.PSTypeName]'Microsoft.PowerShell.Commands.HttpResponseException').Type)
{
    $httpResponseExceptionClassDefinition = @'
namespace Microsoft.PowerShell.Commands
{
    public class HttpResponseException : System.Net.WebException
    {
        public System.Int32 dummy;
    }
}
'@


    Add-Type -TypeDefinition $httpResponseExceptionClassDefinition
}
#endregion

#region LocalizedData
$culture = 'en-us'
if (Test-Path -Path (Join-Path -Path $moduleRoot -ChildPath $PSUICulture))
{
    $culture = $PSUICulture
}

Import-LocalizedData `
    -BindingVariable LocalizedData `
    -Filename 'CosmosDB.strings.psd1' `
    -BaseDirectory $moduleRoot `
    -UICulture $culture
#endregion

#region Functions
<#
    .SYNOPSIS
    Helper function that asserts a Cosmos DB Account name is valid.
#>

function Assert-CosmosDbAccountNameValid
{

    [CmdletBinding()]
    [OutputType([System.Boolean])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $Name,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $ArgumentName = 'Name'
    )

    $matches = [regex]::Match($Name,"[A-Za-z0-9\-]{3,50}")
    if ($matches.value -ne $Name)
    {
        New-CosmosDbInvalidArgumentException `
            -Message $($LocalizedData.AccountNameInvalid -f $Name) `
            -ArgumentName $ArgumentName
    }

    return $true
}

<#
    .SYNOPSIS
    Helper function that asserts a Azure Resource Group name is valid.
#>

function Assert-CosmosDbResourceGroupNameValid
{

    [CmdletBinding()]
    [OutputType([System.Boolean])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $ResourceGroupName,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $ArgumentName = 'ResourceGroupName'
    )

    $matches = [regex]::Match($ResourceGroupName,"[A-Za-z0-9_\-\.]{1,90}(?<!\.)")
    if ($matches.value -ne $ResourceGroupName)
    {
        New-CosmosDbInvalidArgumentException `
            -Message $($LocalizedData.ResourceGroupNameInvalid -f $ResourceGroupName) `
            -ArgumentName $ArgumentName
    }

    return $true
}

function Get-CosmosDbAccount
{

    [CmdletBinding()]
    [OutputType([Object])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ })]
        [System.String]
        $Name,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbResourceGroupNameValid -ResourceGroupName $_ })]
        [System.String]
        $ResourceGroupName
    )

    $getAzResource_parameters = $PSBoundParameters + @{
        ResourceType = 'Microsoft.DocumentDb/databaseAccounts'
        ApiVersion   = '2015-04-08'
    }

    Write-Verbose -Message $($LocalizedData.GettingAzureCosmosDBAccount -f $Name, $ResourceGroupName)

    return Get-AzResource @getAzResource_parameters
}

function Get-CosmosDbAccountConnectionString
{

    [CmdletBinding()]
    [OutputType([Object])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ })]
        [System.String]
        $Name,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbResourceGroupNameValid -ResourceGroupName $_ })]
        [System.String]
        $ResourceGroupName
    )

    $invokeAzResourceAction_parameters = $PSBoundParameters + @{
        ResourceType = 'Microsoft.DocumentDb/databaseAccounts'
        ApiVersion   = '2015-04-08'
        Action       = 'listConnectionStrings'
        Force        = $true
    }

    Write-Verbose -Message $($LocalizedData.GettingAzureCosmosDBAccountConnectionString -f $Name, $ResourceGroupName)
    Write-Warning -Message $LocalizedData.GettingAzureCosmosDBAccountConnectionStringWarning

    return Invoke-AzResourceAction @invokeAzResourceAction_parameters
}

function Get-CosmosDbAccountMasterKey
{

    [CmdletBinding()]
    [Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSAvoidUsingConvertToSecureStringWithPlainText', '', Scope = 'Function')]
    [OutputType([SecureString])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ })]
        [System.String]
        $Name,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbResourceGroupNameValid -ResourceGroupName $_ })]
        [System.String]
        $ResourceGroupName,

        [Parameter(ParameterSetName = 'AzureAccount')]
        [ValidateSet('PrimaryMasterKey', 'SecondaryMasterKey', 'PrimaryReadonlyMasterKey', 'SecondaryReadonlyMasterKey')]
        [System.String]
        $MasterKeyType = 'PrimaryMasterKey'
    )

    Write-Verbose -Message $($LocalizedData.GettingAzureCosmosDBAccountMasterKey -f $Name, $ResourceGroupName, $MasterKeyType)

    $action = 'listKeys'
    if ($MasterKeyType -in ('PrimaryReadonlyMasterKey', 'SecondaryReadonlyMasterKey'))
    {
        # Use the readonlykey Action if a ReadOnly key is required
        $action = 'readonlykeys'
    }

    $invokeAzResourceAction_parameters = @{
        Name              = $Name
        ResourceGroupName = $ResourceGroupName
        ResourceType      = 'Microsoft.DocumentDb/databaseAccounts'
        ApiVersion        = '2015-04-08'
        Action            = $action
        Force             = $true
        ErrorAction       = 'Stop'
    }

    $resource = Invoke-AzResourceAction @invokeAzResourceAction_parameters

    if ($resource)
    {
        return ConvertTo-SecureString `
            -String ($resource.$MasterKeyType) `
            -AsPlainText `
            -Force
    }
}

function New-CosmosDbAccount
{

    [CmdletBinding(
        SupportsShouldProcess = $true
    )]
    [OutputType([Object])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ })]
        [System.String]
        $Name,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbResourceGroupNameValid -ResourceGroupName $_ })]
        [System.String]
        $ResourceGroupName,

        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $Location,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String[]]
        $LocationRead,

        [Parameter()]
        [ValidateSet('Eventual', 'Strong', 'Session', 'BoundedStaleness')]
        [System.String]
        $DefaultConsistencyLevel = 'Session',

        [Parameter()]
        [ValidateRange(1, 100)]
        [System.Int32]
        $MaxIntervalInSeconds = 5,

        [Parameter()]
        [ValidateRange(1, [Int32]::MaxValue)]
        [System.Int32]
        $MaxStalenessPrefix = 100,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String[]]
        $IpRangeFilter = @(),

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String[]]
        $AllowedOrigin,

        [Parameter()]
        [Switch]
        $AsJob
    )

    <#
        Assemble a location object that will be used to generate the request JSON.
        It will consist of a single write location and 0 or more read locations.
    #>

    $locationObject = @(
        @{
            locationName     = $Location
            failoverPriority = 0
        })

    $failoverPriority = 1

    foreach ($locationReadItem in $LocationRead)
    {
        $locationObject += @{
            locationName     = $locationReadItem
            failoverPriority = $failoverPriority
        }
        $failoverPriority++
    }

    $consistencyPolicyObject = @{
        defaultConsistencyLevel = $DefaultConsistencyLevel
        maxIntervalInSeconds    = $MaxIntervalInSeconds
        maxStalenessPrefix      = $MaxStalenessPrefix
    }

    $cosmosDBProperties = @{
        databaseAccountOfferType = 'Standard'
        locations                = $locationObject
        consistencyPolicy        = $consistencyPolicyObject
        ipRangeFilter            = ($IpRangeFilter -join ',')
    }

    if ($PSBoundParameters.ContainsKey('AllowedOrigin'))
    {
        $corsObject = @(
            @{
                allowedOrigins = ($AllowedOrigin -join ',')
            }
        )

        $cosmosDBProperties += @{
            cors = $corsObject
        }
    }

    $null = $PSBoundParameters.Remove('LocationRead')
    $null = $PSBoundParameters.Remove('DefaultConsistencyLevel')
    $null = $PSBoundParameters.Remove('MaxIntervalInSeconds')
    $null = $PSBoundParameters.Remove('MaxStalenessPrefix')
    $null = $PSBoundParameters.Remove('IpRangeFilter')
    $null = $PSBoundParameters.Remove('AllowedOrigin')

    $newAzResource_parameters = $PSBoundParameters + @{
        ResourceType = 'Microsoft.DocumentDb/databaseAccounts'
        ApiVersion   = '2015-04-08'
        Properties   = $cosmosDBProperties
    }

    if ($PSCmdlet.ShouldProcess('Azure', ($LocalizedData.ShouldCreateAzureCosmosDBAccount -f $Name, $ResourceGroupName, $Location)))
    {
        Write-Verbose -Message $($LocalizedData.CreatingAzureCosmosDBAccount -f $Name, $ResourceGroupName, $Location)

        return (New-AzResource @newAzResource_parameters -Force)
    }
}

function New-CosmosDbAccountMasterKey
{

    [CmdletBinding(
        SupportsShouldProcess = $true
    )]
    [Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSAvoidUsingConvertToSecureStringWithPlainText', '', Scope = 'Function')]
    [OutputType([SecureString])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ })]
        [System.String]
        $Name,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbResourceGroupNameValid -ResourceGroupName $_ })]
        [System.String]
        $ResourceGroupName,

        [Parameter(ParameterSetName = 'AzureAccount')]
        [ValidateSet('PrimaryMasterKey', 'SecondaryMasterKey', 'PrimaryReadonlyMasterKey', 'SecondaryReadonlyMasterKey')]
        [System.String]
        $MasterKeyType = 'PrimaryMasterKey'
    )

    Write-Verbose -Message $($LocalizedData.RegeneratingAzureCosmosDBAccountMasterKey -f $Name, $ResourceGroupName, $MasterKeyType)

    $invokeAzResourceAction_parameters = @{
        Name              = $Name
        ResourceGroupName = $ResourceGroupName
        ResourceType      = 'Microsoft.DocumentDb/databaseAccounts'
        ApiVersion        = '2015-04-08'
        Action            = 'regenerateKey'
        Force             = $true
        Parameters        = @{ keyKind = ($MasterKeyType -replace 'MasterKey','')}
        ErrorAction       = 'Stop'
    }

    if ($PSCmdlet.ShouldProcess('Azure', ($LocalizedData.ShouldCreateAzureCosmosDBAccountMasterKey -f $Name, $ResourceGroupName, $MasterKeyType)))
    {
        Invoke-AzResourceAction @invokeAzResourceAction_parameters
    }
}

function Remove-CosmosDbAccount
{

    [CmdletBinding(
        SupportsShouldProcess = $true,
        ConfirmImpact = 'High'
    )]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ })]
        [System.String]
        $Name,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbResourceGroupNameValid -ResourceGroupName $_ })]
        [System.String]
        $ResourceGroupName,

        [Parameter()]
        [Switch]
        $AsJob,

        [Parameter()]
        [Switch]
        $Force
    )

    if ($Force -or `
            $PSCmdlet.ShouldProcess('Azure', ($LocalizedData.ShouldRemoveAzureCosmosDBAccount -f $Name, $ResourceGroupName)))
    {
        Write-Verbose -Message $($LocalizedData.RemovingAzureCosmosDBAccount -f $Name, $ResourceGroupName)

        $removeAzResource_parameters = $PSBoundParameters + @{
            ResourceType = 'Microsoft.DocumentDb/databaseAccounts'
            ApiVersion   = '2015-04-08'
        }
        $removeAzResource_parameters['Force'] = $true

        $null = Remove-AzResource @removeAzResource_parameters
    }
}

function Set-CosmosDbAccount
{

    [CmdletBinding(
        SupportsShouldProcess = $true
    )]
    [OutputType([Object])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ })]
        [System.String]
        $Name,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbResourceGroupNameValid -ResourceGroupName $_ })]
        [System.String]
        $ResourceGroupName,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $Location,

        [Parameter()]
        [System.String[]]
        $LocationRead,

        [Parameter()]
        [ValidateSet('Eventual', 'Strong', 'Session', 'BoundedStaleness')]
        [System.String]
        $DefaultConsistencyLevel,

        [Parameter()]
        [ValidateRange(1, 100)]
        [System.Int32]
        $MaxIntervalInSeconds,

        [Parameter()]
        [ValidateRange(1, [Int32]::MaxValue)]
        [System.Int32]
        $MaxStalenessPrefix,

        [Parameter()]
        [System.String[]]
        $IpRangeFilter,

        [Parameter()]
        [System.String[]]
        $AllowedOrigin,

        [Parameter()]
        [Switch]
        $AsJob
    )

    # Get the existing Cosmos DB Account
    $getCosmosDbAccount_parameters = @{} + $PSBoundParameters
    $null = $getCosmosDbAccount_parameters.Remove('Location')
    $null = $getCosmosDbAccount_parameters.Remove('LocationRead')
    $null = $getCosmosDbAccount_parameters.Remove('DefaultConsistencyLevel')
    $null = $getCosmosDbAccount_parameters.Remove('MaxIntervalInSeconds')
    $null = $getCosmosDbAccount_parameters.Remove('MaxStalenessPrefix')
    $null = $getCosmosDbAccount_parameters.Remove('IpRangeFilter')
    $null = $getCosmosDbAccount_parameters.Remove('AllowedOrigin')
    $null = $getCosmosDbAccount_parameters.Remove('AsJob')
    $existingAccount = Get-CosmosDbAccount @getCosmosDbAccount_parameters

    if (-not $existingAccount)
    {
        New-CosmosDbInvalidOperationException -Message ($LocalizedData.ErrorAccountDoesNotExist -f $Name, $ResourceGroupName)
    }

    <#
        Assemble a location object that will be used to generate the request JSON.
        It will consist of a single write location and 0 or more read locations.
    #>

    if (-not ($PSBoundParameters.ContainsKey('Location')))
    {
        $Location = $existingAccount.Location
    }

    $locationObject = @(
        @{
            locationName     = $Location
            failoverPriority = 0
        })

    if ($PSBoundParameters.ContainsKey('LocationRead'))
    {
        $failoverPriority = 1

        foreach ($locationReadItem in $LocationRead)
        {
            $locationObject += @{
                locationName     = $locationReadItem
                failoverPriority = $failoverPriority
            }
            $failoverPriority++
        }
    }

    if (-not ($PSBoundParameters.ContainsKey('DefaultConsistencyLevel')))
    {
        $DefaultConsistencyLevel = $existingAccount.Properties.consistencyPolicy.defaultConsistencyLevel
    }

    if (-not ($PSBoundParameters.ContainsKey('MaxIntervalInSeconds')))
    {
        $MaxIntervalInSeconds = $existingAccount.Properties.consistencyPolicy.maxIntervalInSeconds
    }

    if (-not ($PSBoundParameters.ContainsKey('MaxStalenessPrefix')))
    {
        $MaxStalenessPrefix = $existingAccount.Properties.consistencyPolicy.maxStalenessPrefix
    }

    $consistencyPolicyObject = @{
        defaultConsistencyLevel = $DefaultConsistencyLevel
        maxIntervalInSeconds    = $MaxIntervalInSeconds
        maxStalenessPrefix      = $MaxStalenessPrefix
    }

    if ($PSBoundParameters.ContainsKey('IpRangeFilter'))
    {
        $ipRangeFilterString = ($IpRangeFilter -join ',')
    }
    else
    {
        $ipRangeFilterString = $existingAccount.Properties.ipRangeFilter
    }

    $cosmosDBProperties = @{
        databaseAccountOfferType = 'Standard'
        locations                = $locationObject
        consistencyPolicy        = $consistencyPolicyObject
        ipRangeFilter            = $ipRangeFilterString
    }

    if ($PSBoundParameters.ContainsKey('AllowedOrigin'))
    {
        $allowedOriginString = ($AllowedOrigin -join ',')
    }
    else
    {
        $allowedOriginString = $existingAccount.Properties.cors.allowedOrigins
    }

    if (-not ([System.String]::IsNullOrEmpty($allowedOriginString)))
    {
        $corsObject = @(
            @{
                allowedOrigins = $allowedOriginString
            }
        )

        $cosmosDBProperties += @{
            cors = $corsObject
        }
    }

    $null = $PSBoundParameters.Remove('Location')
    $null = $PSBoundParameters.Remove('LocationRead')
    $null = $PSBoundParameters.Remove('DefaultConsistencyLevel')
    $null = $PSBoundParameters.Remove('MaxIntervalInSeconds')
    $null = $PSBoundParameters.Remove('MaxStalenessPrefix')
    $null = $PSBoundParameters.Remove('IpRangeFilter')
    $null = $PSBoundParameters.Remove('AllowedOrigin')

    $setAzResource_parameters = $PSBoundParameters + @{
        ResourceType = 'Microsoft.DocumentDb/databaseAccounts'
        ApiVersion   = '2015-04-08'
        Properties   = $cosmosDBProperties
    }

    if ($PSCmdlet.ShouldProcess('Azure', ($LocalizedData.ShouldUpdateAzureCosmosDBAccount -f $Name, $ResourceGroupName)))
    {
        Write-Verbose -Message $($LocalizedData.UpdatingAzureCosmosDBAccount -f $Name, $ResourceGroupName)

        return (Set-AzResource @setAzResource_parameters -Force)
    }
}

<#
    .SYNOPSIS
    Helper function that asserts a Cosmos DB Attachment Id is valid.
#>

function Assert-CosmosDbAttachmentIdValid
{

    [CmdletBinding()]
    [OutputType([System.Boolean])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $Id,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $ArgumentName = 'Id'
    )

    $matches = [regex]::Match($Id,"[^\\/#?]{1,255}(?<!\s)")
    if ($matches.value -ne $Id)
    {
        New-CosmosDbInvalidArgumentException `
            -Message $($LocalizedData.AttachmentIdInvalid -f $Id) `
            -ArgumentName $ArgumentName
    }

    return $true
}

function Get-CosmosDbAttachment
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([Object])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ -ArgumentName 'CollectionId' })]
        [System.String]
        $CollectionId,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbDocumentIdValid -Id $_ -ArgumentName 'DocumentId' })]
        [System.String]
        $DocumentId,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbAttachmentIdValid -Id $_ })]
        [System.String]
        $Id
    )

    $null = $PSBoundParameters.Remove('CollectionId')
    $null = $PSBoundParameters.Remove('DocumentId')

    $resourcePath = ('colls/{0}/docs/{1}/attachments' -f $CollectionId, $DocumentId)

    if (-not [String]::IsNullOrEmpty($Id))
    {
        $null = $PSBoundParameters.Remove('Id')

        $result = Invoke-CosmosDbRequest @PSBoundParameters `
            -Method 'Get' `
            -ResourceType 'attachments' `
            -ResourcePath ('{0}/{1}' -f $resourcePath, $Id)

        $attachment = ConvertFrom-Json -InputObject $result.Content
    }
    else
    {
        $result = Invoke-CosmosDbRequest @PSBoundParameters `
            -Method 'Get' `
            -ResourceType 'attachments' `
            -ResourcePath $resourcePath

        $body = ConvertFrom-Json -InputObject $result.Content
        $attachment = $body.Attachments
    }

    if ($attachment)
    {
        return (Set-CosmosDbAttachmentType -Attachment $attachment)
    }
}

function Get-CosmosDbAttachmentResourcePath
{

    [CmdletBinding()]
    [OutputType([System.String])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ -ArgumentName 'CollectionId' })]
        [System.String]
        $CollectionId,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbDocumentIdValid -Id $_ -ArgumentName 'DocumentId' })]
        [System.String]
        $DocumentId,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbAttachmentIdValid -Id $_ })]
        [System.String]
        $Id
    )

    return ('dbs/{0}/colls/{1}/docs/{2}/attachments/{3}' -f $Database, $CollectionId, $DocumentId, $Id)
}

function New-CosmosDbAttachment
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([Object])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ -ArgumentName 'CollectionId' })]
        [System.String]
        $CollectionId,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbDocumentIdValid -Id $_ -ArgumentName 'DocumentId' })]
        [System.String]
        $DocumentId,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbAttachmentIdValid -Id $_ })]
        [System.String]
        $Id,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $ContentType,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $Media,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $Slug
    )

    $null = $PSBoundParameters.Remove('CollectionId')
    $null = $PSBoundParameters.Remove('DocumentId')

    $resourcePath = ('colls/{0}/docs/{1}/attachments' -f $CollectionId, $DocumentId)

    $headers = @{}
    $bodyObject = @{}

    if ($PSBoundParameters.ContainsKey('Id'))
    {
        $null = $PSBoundParameters.Remove('Id')
        $bodyObject += @{ id = $Id }
    }

    if ($PSBoundParameters.ContainsKey('ContentType'))
    {
        $null = $PSBoundParameters.Remove('ContentType')
        $bodyObject += @{ contentType = $ContentType }
    }

    if ($PSBoundParameters.ContainsKey('Media'))
    {
        $null = $PSBoundParameters.Remove('Media')
        $bodyObject += @{ media = $Media }
    }

    if ($PSBoundParameters.ContainsKey('Slug'))
    {
        $headers += @{
            'Slug' = $Slug
        }
        $null = $PSBoundParameters.Remove('Slug')
    }

    $body = ConvertTo-Json -InputObject $bodyObject

    $result = Invoke-CosmosDbRequest @PSBoundParameters `
        -Method 'Post' `
        -ResourceType 'attachments' `
        -ResourcePath $resourcePath `
        -Body $body `
        -Headers $headers

    $attachment = ConvertFrom-Json -InputObject $result.Content

    if ($attachment)
    {
        return (Set-CosmosDbAttachmentType -Attachment $attachment)
    }
}

function Remove-CosmosDbAttachment
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ -ArgumentName 'CollectionId' })]
        [System.String]
        $CollectionId,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbDocumentIdValid -Id $_ -ArgumentName 'DocumentId' })]
        [System.String]
        $DocumentId,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbAttachmentIdValid -Id $_ })]
        [System.String]
        $Id
    )

    $null = $PSBoundParameters.Remove('CollectionId')
    $null = $PSBoundParameters.Remove('DocumentId')
    $null = $PSBoundParameters.Remove('Id')

    $resourcePath = ('colls/{0}/docs/{1}/attachments/{2}' -f $CollectionId, $DocumentId, $Id)

    $null = Invoke-CosmosDbRequest @PSBoundParameters `
        -Method 'Delete' `
        -ResourceType 'attachments' `
        -ResourcePath $resourcePath
}

function Set-CosmosDbAttachment
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([Object])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter(ParameterSetName = 'Account')]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ -ArgumentName 'CollectionId' })]
        [System.String]
        $CollectionId,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbDocumentIdValid -Id $_ -ArgumentName 'DocumentId' })]
        [System.String]
        $DocumentId,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbAttachmentIdValid -Id $_ })]
        [System.String]
        $Id,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbAttachmentIdValid -Id $_ -ArgumentName 'NewId' })]
        [System.String]
        $NewId,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $ContentType,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $Media,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $Slug
    )

    $null = $PSBoundParameters.Remove('CollectionId')
    $null = $PSBoundParameters.Remove('DocumentId')
    $null = $PSBoundParameters.Remove('Id')

    $resourcePath = ('colls/{0}/docs/{1}/attachments/{2}' -f $CollectionId, $DocumentId, $Id)

    $headers = @{}
    $bodyObject = @{}

    if ($PSBoundParameters.ContainsKey('NewId'))
    {
        $null = $PSBoundParameters.Remove('NewId')
        $bodyObject += @{ id = $NewId }
    }
    else
    {
        $bodyObject += @{ id = $Id }
    }

    if ($PSBoundParameters.ContainsKey('ContentType'))
    {
        $null = $PSBoundParameters.Remove('ContentType')
        $bodyObject += @{ contentType = $ContentType }
    }

    if ($PSBoundParameters.ContainsKey('Media'))
    {
        $null = $PSBoundParameters.Remove('Media')
        $bodyObject += @{ media = $Media }
    }

    if ($PSBoundParameters.ContainsKey('Slug'))
    {
        $headers += @{
            'Slug' = $Slug
        }
        $null = $PSBoundParameters.Remove('Slug')
    }

    $body = ConvertTo-Json -InputObject $bodyObject

    $result = Invoke-CosmosDbRequest @PSBoundParameters `
        -Method 'Put' `
        -ResourceType 'attachments' `
        -ResourcePath $resourcePath `
        -Body $body `
        -Headers $headers

    $attachment = ConvertFrom-Json -InputObject $result.Content

    if ($attachment)
    {
        return (Set-CosmosDbAttachmentType -Attachment $attachment)
    }
}

function Set-CosmosDbAttachmentType
{

    [CmdletBinding()]
    param
    (
        [Parameter(Mandatory = $true)]
        $Attachment
    )

    foreach ($item in $Attachment)
    {
        $item.PSObject.TypeNames.Insert(0, 'CosmosDB.Attachment')
    }

    return $Attachment
}

<#
    .SYNOPSIS
    Helper function that asserts a Cosmos DB Collection Id is valid.
#>

function Assert-CosmosDbCollectionIdValid
{

    [CmdletBinding()]
    [OutputType([System.Boolean])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $Id,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $ArgumentName = 'Id'
    )

    $matches = [regex]::Match($Id,"[^\\/#?]{1,255}(?<!\s)")
    if ($matches.value -ne $Id)
    {
        New-CosmosDbInvalidArgumentException `
            -Message $($LocalizedData.CollectionIdInvalid -f $Id) `
            -ArgumentName $ArgumentName
    }

    return $true
}

function Get-CosmosDbCollection
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([Object])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ })]
        [System.String]
        $Id,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Int32]
        $MaxItemCount = -1,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $ContinuationToken,

        [Parameter()]
        [ref]
        $ResponseHeader
    )

    $null = $PSBoundParameters.Remove('MaxItemCount')
    $null = $PSBoundParameters.Remove('ContinuationToken')

    if ($PSBoundParameters.ContainsKey('ResponseHeader'))
    {
        $ResponseHeaderPassed = $true
        $null = $PSBoundParameters.Remove('ResponseHeader')
    }

    if ($PSBoundParameters.ContainsKey('Id'))
    {
        $null = $PSBoundParameters.Remove('Id')

        $result = Invoke-CosmosDbRequest @PSBoundParameters `
            -Method 'Get' `
            -ResourceType 'colls' `
            -ResourcePath ('colls/{0}' -f $Id)

        $collection = ConvertFrom-Json -InputObject $result.Content
    }
    else
    {
        $headers = @{
            'x-ms-max-item-count' = $MaxItemCount
        }

        if (-not [String]::IsNullOrEmpty($ContinuationToken))
        {
            $headers += @{
                'x-ms-continuation' = $ContinuationToken
            }
        }

        $result = Invoke-CosmosDbRequest @PSBoundParameters `
            -Method 'Get' `
            -ResourceType 'colls' `
            -Headers $headers

        $body = ConvertFrom-Json -InputObject $result.Content
        $collection = $body.DocumentCollections
    }


    if ($ResponseHeaderPassed)
    {
        # Return the result headers
        $ResponseHeader.value = $result.Headers
    }

    if ($collection)
    {
        return (Set-CosmosDbCollectionType -Collection $collection)
    }
}

function Get-CosmosDbCollectionResourcePath
{

    [CmdletBinding()]
    [OutputType([System.String])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ })]
        [System.String]
        $Id
    )

    return ('dbs/{0}/colls/{1}' -f $Database, $Id)
}

function Get-CosmosDbCollectionSize
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([System.Collections.Hashtable])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ })]
        [System.String]
        $Id
    )

    <#
        per https://docs.microsoft.com/en-us/azure/cosmos-db/monitor-accounts,
        The quota and usage information for the collection is returned in the
        x-ms-resource-quota and x-ms-resource-usage headers in the response.
    #>


    $null = $PSBoundParameters.Remove('Id')

    $result = Invoke-CosmosDbRequest @PSBoundParameters `
        -Method 'Get' `
        -ResourceType 'colls' `
        -ResourcePath ('colls/{0}' -f $Id)

    $usageItems = @{}
    $resources = ($result.headers["x-ms-resource-usage"]).Split(';', [System.StringSplitOptions]::RemoveEmptyEntries)

    foreach ($resource in $resources)
    {
        [System.String] $k, $v = $resource.Split('=')
        $usageItems[$k] = $v
    }

    if ($usageItems)
    {
        return $usageItems
    }
}

function New-CosmosDbCollection
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([Object])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ })]
        [System.String]
        $Id,

        [Parameter()]
        [ValidateRange(400, 250000)]
        [System.Int32]
        $OfferThroughput,

        [Parameter()]
        [ValidateSet('S1', 'S2', 'S3')]
        [System.String]
        $OfferType,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $PartitionKey,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [CosmosDB.IndexingPolicy.Policy]
        $IndexingPolicy,

        [Parameter()]
        [ValidateRange(-1,2147483647)]
        [System.Int32]
        $DefaultTimeToLive,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [CosmosDB.UniqueKeyPolicy.Policy]
        $UniqueKeyPolicy
    )

    $headers = @{}

    if ($PSBoundParameters.ContainsKey('OfferThroughput') -and `
            $PSBoundParameters.ContainsKey('OfferType'))
    {
        New-CosmosDbInvalidOperationException -Message $($LocalizedData.ErrorNewCollectionOfferParameterConflict)
    }

    if ($PSBoundParameters.ContainsKey('OfferThroughput'))
    {
        if ($OfferThroughput -gt 10000 -and $PartitionKey.Count -eq 0)
        {
            New-CosmosDbInvalidOperationException -Message $($LocalizedData.ErrorNewCollectionParitionKeyRequired)
        }

        $headers += @{
            'x-ms-offer-throughput' = $OfferThroughput
        }
        $null = $PSBoundParameters.Remove('OfferThroughput')
    }

    if ($PSBoundParameters.ContainsKey('OfferType'))
    {
        $headers += @{
            'x-ms-offer-type' = $OfferType
        }
        $null = $PSBoundParameters.Remove('OfferType')
    }

    $null = $PSBoundParameters.Remove('Id')

    $bodyObject = @{
        id = $id
    }

    if ($PSBoundParameters.ContainsKey('PartitionKey'))
    {
        $bodyObject += @{
            partitionKey = @{
                paths = @('/{0}' -f $PartitionKey.TrimStart('/'))
                kind  = 'Hash'
            }
        }
        $null = $PSBoundParameters.Remove('PartitionKey')
    }

    if ($PSBoundParameters.ContainsKey('IndexingPolicy'))
    {
        $bodyObject += @{
            indexingPolicy = $IndexingPolicy
        }
        $null = $PSBoundParameters.Remove('IndexingPolicy')
    }

    if ($PSBoundParameters.ContainsKey('DefaultTimeToLive'))
    {
        $bodyObject += @{
            defaultTtl = $DefaultTimeToLive
        }
        $null = $PSBoundParameters.Remove('DefaultTimeToLive')
    }

    if ($PSBoundParameters.ContainsKey('UniqueKeyPolicy'))
    {
        $bodyObject += @{
            uniqueKeyPolicy = $UniqueKeyPolicy
        }
        $null = $PSBoundParameters.Remove('UniqueKeyPolicy')
    }

    $body = ConvertTo-Json -InputObject $bodyObject -Depth 10

    $result = Invoke-CosmosDbRequest @PSBoundParameters `
        -Method 'Post' `
        -ResourceType 'colls' `
        -Headers $headers `
        -Body $body

    $collection = ConvertFrom-Json -InputObject $result.Content

    if ($collection)
    {
        return (Set-CosmosDbCollectionType -Collection $collection)
    }
}

function New-CosmosDbCollectionExcludedPath
{

    [CmdletBinding()]
    [OutputType([CosmosDB.IndexingPolicy.Path.ExcludedPath])]
    param
    (
        [Parameter()]
        [System.String]
        $Path = '/*'
    )

    $excludedPath = [CosmosDB.IndexingPolicy.Path.ExcludedPath]::new()
    $excludedPath.Path = $Path

    return $excludedPath
}

function New-CosmosDbCollectionIncludedPath
{

    [CmdletBinding()]
    [OutputType([CosmosDB.IndexingPolicy.Path.IncludedPath])]
    param
    (
        [Parameter()]
        [System.String]
        $Path = '/*',

        [Parameter()]
        [CosmosDB.IndexingPolicy.Path.Index[]]
        $Index
    )

    $includedPath = [CosmosDB.IndexingPolicy.Path.IncludedPath]::new()
    $includedPath.Path = $Path
    $includedPath.Indexes = $Index

    return $includedPath
}

function New-CosmosDbCollectionIncludedPathIndex
{

    [CmdletBinding()]
    [OutputType([CosmosDB.IndexingPolicy.Path.Index])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateSet('Hash', 'Range', 'Spatial')]
        [System.String]
        $Kind,

        [Parameter(Mandatory = $true)]
        [ValidateSet('String', 'Number', 'Point', 'Polygon', 'LineString')]
        [System.String]
        $DataType,

        [Parameter()]
        [Int32]
        $Precision
    )

    # Validate the path index parameters
    switch ($Kind)
    {
        'Hash'
        {
            if ($DataType -notin @('String', 'Number'))
            {
                New-CosmosDbInvalidArgumentException `
                    -Message $($LocalizedData.ErrorNewCollectionIncludedPathIndexInvalidDataType -f $Kind, $DataType, 'String, Number') `
                    -ArgumentName 'DataType'
            }
        }

        'Range'
        {
            if ($DataType -notin @('String', 'Number'))
            {
                New-CosmosDbInvalidArgumentException `
                    -Message $($LocalizedData.ErrorNewCollectionIncludedPathIndexInvalidDataType -f $Kind, $DataType, 'String, Number') `
                    -ArgumentName 'DataType'
            }
        }

        'Spatial'
        {
            if ($DataType -notin @('Point', 'Polygon', 'LineString'))
            {
                New-CosmosDbInvalidArgumentException `
                    -Message $($LocalizedData.ErrorNewCollectionIncludedPathIndexInvalidDataType -f $Kind, $DataType, 'Point, Polygon, LineString') `
                    -ArgumentName 'DataType'
            }

            if ($PSBoundParameters.ContainsKey('Precision'))
            {
                New-CosmosDbInvalidArgumentException `
                    -Message $($LocalizedData.ErrorNewCollectionIncludedPathIndexPrecisionNotSupported -f $Kind) `
                    -ArgumentName 'Precision'
            }
        }
    }

    $index = New-Object -TypeName ('CosmosDB.IndexingPolicy.Path.Index' + $Kind)
    $index.Kind = $Kind
    $index.DataType = $DataType
    if ($PSBoundParameters.ContainsKey('Precision'))
    {
        $index.Precision = $Precision
    }

    return $index
}

function New-CosmosDbCollectionIndexingPolicy
{

    [CmdletBinding()]
    [OutputType([CosmosDB.IndexingPolicy.Policy])]
    param
    (
        [Parameter()]
        [System.Boolean]
        $Automatic = $true,

        [Parameter()]
        [ValidateSet('Consistent', 'Lazy', 'None')]
        [System.String]
        $IndexingMode = 'Consistent',

        [Parameter()]
        [CosmosDB.IndexingPolicy.Path.IncludedPath[]]
        $IncludedPath = @(),

        [Parameter()]
        [CosmosDB.IndexingPolicy.Path.ExcludedPath[]]
        $ExcludedPath = @()
    )

    if ($IndexingMode -eq 'None' -and $Automatic)
    {
        New-CosmosDbInvalidArgumentException `
            -Message $($LocalizedData.ErrorNewCollectionIndexingPolicyInvalidMode) `
            -ArgumentName 'Automatic'
    }

    $indexingPolicy = [CosmosDB.IndexingPolicy.Policy]::new()
    $indexingPolicy.Automatic = $Automatic
    $indexingPolicy.IndexingMode = $IndexingMode
    $indexingPolicy.IncludedPaths = $IncludedPath
    $indexingPolicy.ExcludedPaths = $ExcludedPath

    return $indexingPolicy
}

function New-CosmosDbCollectionUniqueKey
{

    [CmdletBinding()]
    [OutputType([CosmosDB.UniqueKeyPolicy.UniqueKey])]
    param
    (
        [Parameter(Mandatory = $true)]
        [System.String[]]
        $Path
    )

    $uniqueKey = [CosmosDB.UniqueKeyPolicy.UniqueKey]::new()
    $uniqueKey.paths = $Path

    return $uniqueKey
}

function New-CosmosDbCollectionUniqueKeyPolicy
{

    [CmdletBinding()]
    [OutputType([CosmosDB.UniqueKeyPolicy.Policy])]
    param
    (
        [Parameter(Mandatory = $true)]
        [CosmosDb.UniqueKeyPolicy.UniqueKey[]]
        $UniqueKey
    )

    $uniqueKeyPolicy = [CosmosDB.UniqueKeyPolicy.Policy]::new()
    $uniqueKeyPolicy.uniqueKeys = $UniqueKey

    return $uniqueKeyPolicy
}

function Remove-CosmosDbCollection
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ })]
        [System.String]
        $Id
    )

    $null = $PSBoundParameters.Remove('Id')

    $null = Invoke-CosmosDbRequest @PSBoundParameters `
        -Method 'Delete' `
        -ResourceType 'colls' `
        -ResourcePath ('colls/{0}' -f $Id)
}

function Set-CosmosDbCollection
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([Object])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ })]
        [System.String]
        $Id,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [CosmosDB.IndexingPolicy.Policy]
        $IndexingPolicy,

        [Parameter()]
        [ValidateRange(-1,2147483647)]
        [System.Int32]
        $DefaultTimeToLive,

        [Parameter()]
        [Switch]
        $RemoveDefaultTimeToLive,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [CosmosDB.UniqueKeyPolicy.Policy]
        $UniqueKeyPolicy
    )

    if ($PSBoundParameters.ContainsKey('DefaultTimeToLive') -and $RemoveDefaultTimeToLive.IsPresent)
    {
        New-CosmosDbInvalidArgumentException `
            -Message $LocalizedData.ErrorSetCollectionRemoveDefaultTimeToLiveConflict `
            -ArgumentName 'RemoveDefaultTimeToLive'
    }

    $headers = @{}

    $bodyObject = @{
        id = $id
    }

    $indexingPolicyIncluded = $PSBoundParameters.ContainsKey('IndexingPolicy')
    $defaultTimeToLiveIncluded = $PSBoundParameters.ContainsKey('DefaultTimeToLive')
    $uniqueKeyPolicyIncluded = $PSBoundParameters.ContainsKey('UniqueKeyPolicy')

    $null = $PSBoundParameters.Remove('IndexingPolicy')
    $null = $PSBoundParameters.Remove('DefaultTimeToLive')
    $null = $PSBoundParameters.Remove('RemoveDefaultTimeToLive')
    $null = $PSBoundParameters.Remove('UniqueKeyPolicy')

    <#
        The partition key on an existing collection can not be changed.
        So to ensure an error does not occur, get the current collection
        and pass the existing partition key in the body.
    #>

    $existingCollection = Get-CosmosDbCollection @PSBoundParameters

    $null = $PSBoundParameters.Remove('Id')

    if ($indexingPolicyIncluded)
    {
        $bodyObject += @{
            indexingPolicy = $IndexingPolicy
        }
    }
    else
    {
        $bodyObject += @{
            indexingPolicy = $existingCollection.indexingPolicy
        }
    }

    if ($existingCollection.partitionKey)
    {
        $bodyObject += @{
            partitionKey = $existingCollection.partitionKey
        }
    }

    if ($defaultTimeToLiveIncluded)
    {
        $bodyObject += @{
            defaultTtl = $DefaultTimeToLive
        }
    }
    elseif ($existingCollection.defaultTtl -and -not $RemoveDefaultTimeToLive)
    {
        $bodyObject += @{
            defaultTtl = $existingCollection.defaultTtl
        }
    }

    if ($uniqueKeyPolicyIncluded)
    {
        $bodyObject += @{
            uniqueKeyPolicy = $UniqueKeyPolicy
        }
    }
    elseif ($existingCollection.uniqueKeyPolicy)
    {
        $bodyObject += @{
            uniqueKeyPolicy = $existingCollection.uniqueKeyPolicy
        }
    }

    $body = ConvertTo-Json -InputObject $bodyObject -Depth 10

    $result = Invoke-CosmosDbRequest @PSBoundParameters `
        -Method 'Put' `
        -ResourceType 'colls' `
        -ResourcePath ('colls/{0}' -f $Id) `
        -Headers $headers `
        -Body $body

    $collection = ConvertFrom-Json -InputObject $result.Content

    if ($collection)
    {
        return (Set-CosmosDbCollectionType -Collection $collection)
    }
}

function Set-CosmosDbCollectionType
{

    [CmdletBinding()]
    param
    (
        [Parameter(Mandatory = $true)]
        $Collection
    )

    foreach ($item in $Collection)
    {
        $item.PSObject.TypeNames.Insert(0, 'CosmosDB.Collection')
        $item.indexingPolicy.PSObject.TypeNames.Insert(0, 'CosmosDB.Collection.IndexingPolicy')
        foreach ($includedPath in $item.indexingPolicy.includedPaths)
        {
            $includedPath.PSObject.TypeNames.Insert(0, 'CosmosDB.Collection.IndexingPolicy.IncludedPath')
            foreach ($index in $includedPath.indexes)
            {
                $index.PSObject.TypeNames.Insert(0, 'CosmosDB.Collection.IndexingPolicy.Index')
            }
        }
        foreach ($excludedPath in $item.indexingPolicy.excludedPaths)
        {
            $excludedPath.PSObject.TypeNames.Insert(0, 'CosmosDB.Collection.IndexingPolicy.ExcludedPath')
            foreach ($index in $excludedPath.indexes)
            {
                $index.PSObject.TypeNames.Insert(0, 'CosmosDB.Collection.IndexingPolicy.Index')
            }
        }
    }

    return $Collection
}

<#
    .SYNOPSIS
    Helper function that asserts a Cosmos DB Database Id is valid.
#>

function Assert-CosmosDbDatabaseIdValid
{

    [CmdletBinding()]
    [OutputType([System.Boolean])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $Id,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $ArgumentName = 'Id'
    )

    $matches = [regex]::Match($Id,"[^\\/#?=]{1,255}(?<!\s)")
    if ($matches.value -ne $Id)
    {
        New-CosmosDbInvalidArgumentException `
            -Message $($LocalizedData.DatabaseIdInvalid -f $Id) `
            -ArgumentName $ArgumentName
    }

    return $true
}

function Get-CosmosDbDatabase
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([Object])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ })]
        [System.String]
        $Id
    )

    if ($PSBoundParameters.ContainsKey('Id'))
    {
        $null = $PSBoundParameters.Remove('Id')

        $result = Invoke-CosmosDbRequest @PSBoundParameters `
            -Method 'Get' `
            -ResourceType 'dbs' `
            -ResourcePath ('dbs/{0}' -f $Id)

        $database = ConvertFrom-Json -InputObject $result.Content
    }
    else
    {
        $result = Invoke-CosmosDbRequest @PSBoundParameters `
            -Method 'Get' `
            -ResourceType 'dbs'

        $body = ConvertFrom-Json -InputObject $result.Content

        $database = $body.Databases
    }

    if ($database)
    {
        return (Set-CosmosDbDatabaseType -Database $database)
    }
}

function Get-CosmosDbDatabaseResourcePath
{

    [CmdletBinding()]
    [OutputType([System.String])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ })]
        [System.String]
        $Id
    )

    return ('dbs/{0}' -f $Id)
}

function New-CosmosDbDatabase
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([Object])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ })]
        [System.String]
        $Id
    )

    $null = $PSBoundParameters.Remove('Id')

    $result = Invoke-CosmosDbRequest @PSBoundParameters `
        -Method 'Post' `
        -ResourceType 'dbs' `
        -Body "{ `"id`": `"$id`" }"

    $database = ConvertFrom-Json -InputObject $result.Content

    if ($database)
    {
        return (Set-CosmosDbDatabaseType -Database $database)
    }
}

function Remove-CosmosDbDatabase
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ })]
        [System.String]
        $Id
    )

    $null = $PSBoundParameters.Remove('Id')

    $null = Invoke-CosmosDbRequest @PSBoundParameters `
        -Method 'Delete' `
        -ResourceType 'dbs' `
        -ResourcePath ('dbs/{0}' -f $Id)
}

function Set-CosmosDbDatabaseType
{

    [CmdletBinding()]
    param
    (
        [Parameter(Mandatory = $true)]
        $Database
    )

    foreach ($item in $Database)
    {
        $item.PSObject.TypeNames.Insert(0, 'CosmosDB.Database')
    }

    return $Database
}

<#
    .SYNOPSIS
    Helper function that asserts a Cosmos DB Document Id is valid.
#>

function Assert-CosmosDbDocumentIdValid
{

    [CmdletBinding()]
    [OutputType([System.Boolean])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $Id,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $ArgumentName = 'Id'
    )

    $matches = [regex]::Match($Id,"[^\\/#?]{1,255}(?<!\s)")
    if ($matches.value -ne $Id)
    {
        New-CosmosDbInvalidArgumentException `
            -Message $($LocalizedData.DocumentIdInvalid -f $Id) `
            -ArgumentName $ArgumentName
    }

    return $true
}

function Get-CosmosDbDocument
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([Object])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ -ArgumentName 'CollectionId' })]
        [System.String]
        $CollectionId,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDocumentIdValid -Id $_ })]
        [System.String]
        $Id,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String[]]
        $PartitionKey,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Int32]
        $MaxItemCount = -1,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $ContinuationToken,

        [Parameter()]
        [ValidateSet('Strong', 'Bounded', 'Session', 'Eventual')]
        [System.String]
        $ConsistencyLevel,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $SessionToken,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $PartitionKeyRangeId,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $Query,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [Hashtable[]]
        $QueryParameters,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Boolean]
        $QueryEnableCrossPartition = $False,

        [Alias("ResultHeaders")]
        [Parameter()]
        [ref]
        $ResponseHeader
    )

    $null = $PSBoundParameters.Remove('Id')
    $null = $PSBoundParameters.Remove('CollectionId')
    $null = $PSBoundParameters.Remove('MaxItemCount')
    $null = $PSBoundParameters.Remove('ContinuationToken')
    $null = $PSBoundParameters.Remove('ConsistencyLevel')
    $null = $PSBoundParameters.Remove('SessionToken')
    $null = $PSBoundParameters.Remove('PartitionKeyRangeId')
    $null = $PSBoundParameters.Remove('Query')
    $null = $PSBoundParameters.Remove('QueryParameters')
    $null = $PSBoundParameters.Remove('QueryEnableCrossPartition')

    if ($PSBoundParameters.ContainsKey('ResponseHeader'))
    {
        $ResponseHeaderPassed = $true
        $null = $PSBoundParameters.Remove('ResponseHeader')
    }

    $resourcePath = ('colls/{0}/docs' -f $CollectionId)
    $method = 'Get'
    $headers = @{}

    if (-not [String]::IsNullOrEmpty($Id))
    {
        # A document Id has been specified
        if ($PSBoundParameters.ContainsKey('PartitionKey'))
        {
            $headers += @{
                'x-ms-documentdb-partitionkey' = '["' + ($PartitionKey -join '","') + '"]'
            }
            $null = $PSBoundParameters.Remove('PartitionKey')
        }

        $result = Invoke-CosmosDbRequest @PSBoundParameters `
            -Method $method `
            -Headers $headers `
            -ResourceType 'docs' `
            -ResourcePath ('{0}/{1}' -f $resourcePath, $Id)

        $document = ConvertFrom-JSON -InputObject $result.Content
    }
    else
    {
        $body = ''

        if (-not [String]::IsNullOrEmpty($Query))
        {
            # A query has been specified
            $method = 'Post'

            $headers += @{
                'x-ms-documentdb-isquery' = $True
            }

            if ($QueryEnableCrossPartition -eq $True)
            {
                $headers += @{
                    'x-ms-documentdb-query-enablecrosspartition' = $True
                }
            }

            # Set the content type to application/query+json for querying
            $null = $PSBoundParameters.Add('ContentType', 'application/query+json')

            # Create the body JSON for the query
            $bodyObject = @{ query = $Query }
            if (-not [String]::IsNullOrEmpty($QueryParameters))
            {
                $bodyObject += @{ parameters = $QueryParameters }
            }
            $body = ConvertTo-Json -InputObject $bodyObject
        }
        else
        {
            if (-not [String]::IsNullOrEmpty($PartitionKeyRangeId))
            {
                $headers += @{
                    'x-ms-documentdb-partitionkeyrangeid' = $PartitionKeyRangeId
                }
            }
        }

        # The following headers apply when querying documents or just getting a list
        if ($PSBoundParameters.ContainsKey('PartitionKey'))
        {
            $headers += @{
                'x-ms-documentdb-partitionkey' = '["' + ($PartitionKey -join '","') + '"]'
            }
            $null = $PSBoundParameters.Remove('PartitionKey')
        }

        $headers += @{
            'x-ms-max-item-count' = $MaxItemCount
        }

        if (-not [String]::IsNullOrEmpty($ContinuationToken))
        {
            $headers += @{
                'x-ms-continuation' = $ContinuationToken
            }
        }

        if (-not [String]::IsNullOrEmpty($ConsistencyLevel))
        {
            $headers += @{
                'x-ms-consistency-level' = $ConsistencyLevel
            }
        }

        if (-not [String]::IsNullOrEmpty($SessionToken))
        {
            $headers += @{
                'x-ms-session-token' = $SessionToken
            }
        }

        <#
            Because the headers of this request will contain important information
            then we need to use a plain web request.
        #>

        $result = Invoke-CosmosDbRequest @PSBoundParameters `
            -Method $method `
            -ResourceType 'docs' `
            -ResourcePath $resourcePath `
            -Headers $headers `
            -Body $body

        $body = ConvertFrom-JSON -InputObject $result.Content
        $document = $body.Documents

        if ($ResponseHeaderPassed)
        {
            # Return the result headers
            $ResponseHeader.value = $result.Headers
        }
    }

    if ($document)
    {
        return (Set-CosmosDbDocumentType -Document $document)
    }
}

function Get-CosmosDbDocumentResourcePath
{

    [CmdletBinding()]
    [OutputType([System.String])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ -ArgumentName 'CollectionId' })]
        [System.String]
        $CollectionId,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbDocumentIdValid -Id $_ })]
        [System.String]
        $Id
    )

    return ('dbs/{0}/colls/{1}/docs/{2}' -f $Database, $CollectionId, $Id)
}

function New-CosmosDbDocument
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([Object])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ -ArgumentName 'CollectionId' })]
        [System.String]
        $CollectionId,

        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $DocumentBody,

        [Parameter()]
        [ValidateSet('Include', 'Exclude')]
        [System.String]
        $IndexingDirective,

        [Parameter()]
        [System.Boolean]
        $Upsert,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String[]]
        $PartitionKey,

        [Parameter()]
        [ValidateSet('Default', 'UTF-8')]
        [System.String]
        $Encoding = 'Default'
    )

    $null = $PSBoundParameters.Remove('CollectionId')
    $null = $PSBoundParameters.Remove('Id')
    $null = $PSBoundParameters.Remove('DocumentBody')

    $resourcePath = ('colls/{0}/docs' -f $CollectionId)

    $headers = @{}

    if ($PSBoundParameters.ContainsKey('Upsert'))
    {
        $headers += @{
            'x-ms-documentdb-is-upsert' = $Upsert
        }
        $null = $PSBoundParameters.Remove('Upsert')
    }

    if ($PSBoundParameters.ContainsKey('IndexingDirective'))
    {
        $headers += @{
            'x-ms-indexing-directive' = $IndexingDirective
        }
        $null = $PSBoundParameters.Remove('IndexingDirective')
    }

    if ($PSBoundParameters.ContainsKey('PartitionKey'))
    {
        $headers += @{
            'x-ms-documentdb-partitionkey' = '["' + ($PartitionKey -join '","') + '"]'
        }
        $null = $PSBoundParameters.Remove('PartitionKey')
    }

    $result = Invoke-CosmosDbRequest @PSBoundParameters `
        -Method 'Post' `
        -ResourceType 'docs' `
        -ResourcePath $resourcePath `
        -Body $DocumentBody `
        -Headers $headers

    $document = ConvertFrom-Json -InputObject $result.Content

    if ($document)
    {
        return (Set-CosmosDbDocumentType -Document $document)
    }
}

function Remove-CosmosDbDocument
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ -ArgumentName 'CollectionId' })]
        [System.String]
        $CollectionId,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDocumentIdValid -Id $_ })]
        [System.String]
        $Id,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $PartitionKey
    )

    $null = $PSBoundParameters.Remove('CollectionId')
    $null = $PSBoundParameters.Remove('Id')

    $resourcePath = ('colls/{0}/docs/{1}' -f $CollectionId, $Id)

    $headers = @{}

    if ($PSBoundParameters.ContainsKey('PartitionKey'))
    {
        $headers += @{
            'x-ms-documentdb-partitionkey' = '["' + ($PartitionKey -join '","') + '"]'
        }
        $null = $PSBoundParameters.Remove('PartitionKey')
    }

    $null = Invoke-CosmosDbRequest @PSBoundParameters `
        -Method 'Delete' `
        -ResourceType 'docs' `
        -ResourcePath $resourcePath `
        -Headers $headers
}

function Set-CosmosDbDocument
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([Object])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter(ParameterSetName = 'Account')]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ -ArgumentName 'CollectionId' })]
        [System.String]
        $CollectionId,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbDocumentIdValid -Id $_ })]
        [System.String]
        $Id,

        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $DocumentBody,

        [Parameter()]
        [ValidateSet('Include', 'Exclude')]
        [System.String]
        $IndexingDirective,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $PartitionKey,

        [Parameter()]
        [ValidateSet('Default', 'UTF-8')]
        [System.String]
        $Encoding = 'Default'
    )

    $null = $PSBoundParameters.Remove('CollectionId')
    $null = $PSBoundParameters.Remove('Id')
    $null = $PSBoundParameters.Remove('DocumentBody')

    $resourcePath = ('colls/{0}/docs/{1}' -f $CollectionId, $Id)

    $headers = @{}

    if ($PSBoundParameters.ContainsKey('IndexingDirective'))
    {
        $headers += @{
            'x-ms-indexing-directive' = $IndexingDirective
        }
        $null = $PSBoundParameters.Remove('IndexingDirective')
    }

    if ($PSBoundParameters.ContainsKey('PartitionKey'))
    {
        $headers += @{
            'x-ms-documentdb-partitionkey' = '["' + ($PartitionKey -join '","') + '"]'
        }
        $null = $PSBoundParameters.Remove('PartitionKey')
    }

    $result = Invoke-CosmosDbRequest @PSBoundParameters `
        -Method 'Put' `
        -ResourceType 'docs' `
        -ResourcePath $resourcePath `
        -Body $DocumentBody `
        -Headers $headers

    $document = ConvertFrom-Json -InputObject $result.Content

    if ($document)
    {
        return (Set-CosmosDbDocumentType -Document $document)
    }
}

function Set-CosmosDbDocumentType
{

    [CmdletBinding()]
    param
    (
        [Parameter(Mandatory = $true)]
        $Document
    )

    foreach ($item in $Document)
    {
        $item.PSObject.TypeNames.Insert(0, 'CosmosDB.Document')
    }

    return $Document
}

function Get-CosmosDbOffer
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([Object])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $Id,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $Query
    )

    if ($PSBoundParameters.ContainsKey('Id'))
    {
        $null = $PSBoundParameters.Remove('Id')

        $result = Invoke-CosmosDbRequest @PSBoundParameters `
            -Method 'Get' `
            -ResourceType 'offers' `
            -ResourcePath ('offers/{0}' -f $Id)

        $offer = ConvertFrom-Json -InputObject $result.Content
    }
    else
    {
        if (-not [String]::IsNullOrEmpty($Query))
        {
            $null = $PSBoundParameters.Remove('Query')

            # A query has been specified
            $headers += @{
                'x-ms-documentdb-isquery' = $True
            }

            # Set the content type to application/query+json for querying
            $null = $PSBoundParameters.Add('ContentType', 'application/query+json')

            # Create the body JSON for the query
            $bodyObject = @{ query = $Query }
            $body = ConvertTo-Json -InputObject $bodyObject

            $result = Invoke-CosmosDbRequest @PSBoundParameters `
                -Method 'Post' `
                -ResourceType 'offers' `
                -Headers $headers `
                -Body $body
        }
        else
        {
            $result = Invoke-CosmosDbRequest @PSBoundParameters `
                -Method 'Get' `
                -ResourceType 'offers'
        }

        $body = ConvertFrom-Json -InputObject $result.Content
        $offer = $body.Offers
    }

    if ($offer)
    {
        return (Set-CosmosDbOfferType -Offer $offer)
    }
}

function Get-CosmosDbOfferResourcePath
{

    [CmdletBinding()]
    [OutputType([System.String])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $Id
    )

    return ('offers/{0}' -f $Id)
}

function Set-CosmosDbOffer
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([Object])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter(ParameterSetName = 'Account')]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter(Mandatory = $true, ValueFromPipeline = $true)]
        [System.Object[]]
        $InputObject,

        [Parameter()]
        [ValidateSet('V1', 'V2')]
        [System.String]
        $OfferVersion,

        [Parameter()]
        [ValidateSet('S1', 'S2', 'S3', 'Invalid')]
        [System.String]
        $OfferType,

        [Parameter()]
        [ValidateRange(400, 250000)]
        [System.Int32]
        $OfferThroughput,

        [Parameter()]
        [System.Boolean]
        $OfferIsRUPerMinuteThroughputEnabled
    )

    begin {
        $invokeCosmosDbRequest = @{} + $PSBoundParameters
    }

    process {
        $null = $invokeCosmosDbRequest.Remove('InputObject')

        foreach ($object in $InputObject)
        {
            $bodyObject = @{
                '_rid'          = $object._rid
                id              = $object.id
                '_ts'           = $object._ts
                '_self'         = $object._self
                '_etag'         = $object._etag
                resource        = $object.resource
                offerType       = $object.offerType
                offerResourceId = $object.offerResourceId
                offerVersion    = $object.offerVersion
            }

            if ($PSBoundParameters.ContainsKey('OfferVersion'))
            {
                $null = $invokeCosmosDbRequest.Remove('OfferVersion')
                $bodyObject.offerVersion = $OfferVersion
            }

            if ($PSBoundParameters.ContainsKey('OfferType'))
            {
                $null = $invokeCosmosDbRequest.Remove('OfferType')
                $bodyObject.offerType = $OfferType
            }

            if ($bodyObject.offerVersion -eq 'V2')
            {
                <#
                    Setting the Offer Throughput and RU Per minute settings only
                    applicable for Offer Version V2
                #>

                $content = @{
                    offerThroughput = $object.Content.offerThroughput
                    offerIsRUPerMinuteThroughputEnabled = $object.Content.offerIsRUPerMinuteThroughputEnabled
                }

                if ($PSBoundParameters.ContainsKey('OfferThroughput'))
                {
                    $null = $invokeCosmosDbRequest.Remove('OfferThroughput')
                    $content.offerThroughput = $OfferThroughput
                }
                else
                {
                    if ($content.offerThroughput -lt 1000)
                    {
                        <#
                            If no offer throughput specified set to min for V2 of 400
                            However for partitioned collections minimum is 1000
                        #>

                        $content.offerThroughput = 1000
                    }
                }

                if ($PSBoundParameters.ContainsKey('OfferIsRUPerMinuteThroughputEnabled'))
                {
                    $null = $invokeCosmosDbRequest.Remove('OfferIsRUPerMinuteThroughputEnabled')
                    $content.offerIsRUPerMinuteThroughputEnabled = $OfferIsRUPerMinuteThroughputEnabled
                }

                $bodyObject += @{
                    content = $content
                }
            }

            $result = Invoke-CosmosDbRequest @invokeCosmosDbRequest `
                -Method 'Put' `
                -ResourceType 'offers' `
                -ResourcePath ('offers/{0}' -f $bodyObject.id) `
                -Body (ConvertTo-Json -InputObject $bodyObject)

            $offer = ConvertFrom-Json -InputObject $result.Content

            if ($offer)
            {
                (Set-CosmosDbOfferType -Offer $offer)
            }
        }
    }

    end {}
}

function Set-CosmosDbOfferType
{

    [CmdletBinding()]
    param
    (
        [Parameter(Mandatory = $true)]
        $Offer
    )

    foreach ($item in $Offer)
    {
        $item.PSObject.TypeNames.Insert(0, 'CosmosDB.Offer')
    }

    return $Offer
}

<#
    .SYNOPSIS
    Helper function that asserts a Cosmos DB Permission Id is valid.
#>

function Assert-CosmosDbPermissionIdValid
{

    [CmdletBinding()]
    [OutputType([System.Boolean])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $Id,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $ArgumentName = 'Id'
    )

    $matches = [regex]::Match($Id,"[^\\/#?]{1,255}(?<!\s)")
    if ($matches.value -ne $Id)
    {
        New-CosmosDbInvalidArgumentException `
            -Message $($LocalizedData.PermissionIdInvalid -f $Id) `
            -ArgumentName $ArgumentName
    }

    return $true
}

function Get-CosmosDbPermission
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([Object])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbUserIdValid -Id $_ -ArgumentName 'UserId' })]
        [System.String]
        $UserId,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbPermissionIdValid -Id $_ })]
        [System.String]
        $Id,

        [Parameter()]
        [ValidateRange(600,18000)]
        [System.Int32]
        $TokenExpiry
    )

    $null = $PSBoundParameters.Remove('UserId')

    $resourcePath = ('users/{0}/permissions' -f $UserId)

    $headers = @{}

    if ($PSBoundParameters.ContainsKey('TokenExpiry'))
    {
        $null = $PSBoundParameters.Remove('TokenExpiry')

        $headers += @{
            'x-ms-documentdb-expiry-seconds' = $TokenExpiry
        }
    }

    if ($PSBoundParameters.ContainsKey('Id'))
    {
        $null = $PSBoundParameters.Remove('Id')

        $result = Invoke-CosmosDbRequest @PSBoundParameters `
            -Method 'Get' `
            -ResourceType 'permissions' `
            -ResourcePath ('{0}/{1}' -f $resourcePath, $Id) `
            -Headers $headers

        $permission = ConvertFrom-Json -InputObject $result.Content
    }
    else
    {
        $result = Invoke-CosmosDbRequest @PSBoundParameters `
            -Method 'Get' `
            -ResourceType 'permissions' `
            -ResourcePath $resourcePath `
            -Headers $headers

        $body = ConvertFrom-Json -InputObject $result.Content

        $permission = $body.Permissions
    }

    if ($permission)
    {
        return (Set-CosmosDbPermissionType -Permission $permission)
    }
}

function Get-CosmosDbPermissionResourcePath
{

    [CmdletBinding()]
    [OutputType([System.String])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbUserIdValid -Id $_ -ArgumentName 'UserId' })]
        [System.String]
        $UserId,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbPermissionIdValid -Id $_ })]
        [System.String]
        $Id
    )

    return ('dbs/{0}/users/{1}/permissions/{2}' -f $Database, $UserId, $Id)
}

function New-CosmosDbPermission
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([Object])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbUserIdValid -Id $_ -ArgumentName 'UserId' })]
        [System.String]
        $UserId,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbPermissionIdValid -Id $_ })]
        [System.String]
        $Id,

        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $Resource,

        [Parameter()]
        [ValidateSet('All', 'Read')]
        [System.String]
        $PermissionMode = 'All'
    )

    $null = $PSBoundParameters.Remove('UserId')
    $null = $PSBoundParameters.Remove('Id')
    $null = $PSBoundParameters.Remove('Resource')
    $null = $PSBoundParameters.Remove('PermissionMode')

    $resourcePath = ('users/{0}/permissions' -f $UserId)

    $result = Invoke-CosmosDbRequest @PSBoundParameters `
        -Method 'Post' `
        -ResourceType 'permissions' `
        -ResourcePath $resourcePath `
        -Body "{ `"id`": `"$id`", `"permissionMode`" : `"$PermissionMode`", `"resource`" : `"$Resource`" }"

    $permission = ConvertFrom-Json -InputObject $result.Content

    if ($permission)
    {
        return (Set-CosmosDbPermissionType -Permission $permission)
    }
}

function Remove-CosmosDbPermission
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbUserIdValid -Id $_ -ArgumentName 'UserId' })]
        [System.String]
        $UserId,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbPermissionIdValid -Id $_ })]
        [System.String]
        $Id
    )

    $null = $PSBoundParameters.Remove('UserId')
    $null = $PSBoundParameters.Remove('Id')

    $resourcePath = ('users/{0}/permissions/{1}' -f $UserId,$Id)

    $null = Invoke-CosmosDbRequest @PSBoundParameters `
        -Method 'Delete' `
        -ResourceType 'permissions' `
        -ResourcePath $resourcePath
}

function Set-CosmosDbPermissionType
{

    [CmdletBinding()]
    param
    (
        [Parameter(Mandatory = $true)]
        $Permission
    )

    foreach ($item in $Permission)
    {
        $item.PSObject.TypeNames.Insert(0, 'CosmosDB.Permission')
    }

    return $Permission
}

<#
    .SYNOPSIS
    Helper function that asserts a Cosmos DB Stored Procedure Id is valid.
#>

function Assert-CosmosDbStoredProcedureIdValid
{

    [CmdletBinding()]
    [OutputType([System.Boolean])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $Id,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $ArgumentName = 'Id'
    )

    $matches = [regex]::Match($Id,"[^\\/#?]{1,255}(?<!\s)")
    if ($matches.value -ne $Id)
    {
        New-CosmosDbInvalidArgumentException `
            -Message $($LocalizedData.StoredProcedureIdInvalid -f $Id) `
            -ArgumentName $ArgumentName
    }

    return $true
}

function Get-CosmosDbStoredProcedure
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([Object])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ -ArgumentName 'CollectionId' })]
        [System.String]
        $CollectionId,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbStoredProcedureIdValid -Id $_ })]
        [System.String]
        $Id
    )

    $null = $PSBoundParameters.Remove('CollectionId')

    $resourcePath = ('colls/{0}/sprocs' -f $CollectionId)

    if ($PSBoundParameters.ContainsKey('Id'))
    {
        $null = $PSBoundParameters.Remove('Id')

        $result = Invoke-CosmosDbRequest @PSBoundParameters `
            -Method 'Get' `
            -ResourceType 'sprocs' `
            -ResourcePath ('{0}/{1}' -f $resourcePath, $Id)

        $storedProcedure = ConvertFrom-Json -InputObject $result.Content
    }
    else
    {
        $result = Invoke-CosmosDbRequest @PSBoundParameters `
            -Method 'Get' `
            -ResourceType 'sprocs' `
            -ResourcePath $resourcePath

        $body = ConvertFrom-Json -InputObject $result.Content
        $storedProcedure = $body.StoredProcedures
    }

    if ($storedProcedure)
    {
        return (Set-CosmosDbStoredProcedureType -StoredProcedure $storedProcedure)
    }
}

function Get-CosmosDbStoredProcedureResourcePath
{

    [CmdletBinding()]
    [OutputType([System.String])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ -ArgumentName 'CollectionId' })]
        [System.String]
        $CollectionId,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbStoredProcedureIdValid -Id $_ })]
        [System.String]
        $Id
    )

    return ('dbs/{0}/colls/{1}/sprocs/{2}' -f $Database, $CollectionId, $Id)
}

function Invoke-CosmosDbStoredProcedure
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([Object])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ -ArgumentName 'CollectionId' })]
        [System.String]
        $CollectionId,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String[]]
        $PartitionKey,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbStoredProcedureIdValid -Id $_ })]
        [System.String]
        $Id,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Object[]]
        $StoredProcedureParameter
    )

    $null = $PSBoundParameters.Remove('CollectionId')
    $null = $PSBoundParameters.Remove('Id')

    $resourcePath = ('colls/{0}/sprocs/{1}' -f $CollectionId, $Id)

    $headers = @{}
    if ($PSBoundParameters.ContainsKey('PartitionKey'))
    {
        $headers += @{
            'x-ms-documentdb-partitionkey' = '["' + ($PartitionKey -join '","') + '"]'
        }
        $null = $PSBoundParameters.Remove('PartitionKey')
    }

    if ($PSBoundParameters.ContainsKey('Debug'))
    {
        $headers += @{
            'x-ms-documentdb-script-enable-logging' = $true
        }
        $null = $PSBoundParameters.Remove('Debug')
    }

    if ($PSBoundParameters.ContainsKey('StoredProcedureParameter'))
    {
        $body = ConvertTo-Json -InputObject $StoredProcedureParameter -Depth 10 -Compress
        $null = $PSBoundParameters.Remove('StoredProcedureParameter')
    }
    else
    {
        $body = '[]'
    }

    <#
        Because the headers of this request will contain important information
        then we need to use a plain web request.
    #>

    $result = Invoke-CosmosDbRequest @PSBoundParameters `
        -Method 'Post' `
        -ResourceType 'sprocs' `
        -ResourcePath $resourcePath `
        -Headers $headers `
        -Body $body

    if ($result.Headers.'x-ms-documentdb-script-log-results')
    {
        $logs = [Uri]::UnescapeDataString($result.Headers.'x-ms-documentdb-script-log-results').Trim()
        Write-Verbose -Message $($LocalizedData.StoredProcedureScriptLogResults -f $Id, $logs)
    }

    if ($result.Content)
    {
        return (ConvertFrom-Json -InputObject $result.Content)
    }
}

function New-CosmosDbStoredProcedure
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([Object])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ -ArgumentName 'CollectionId' })]
        [System.String]
        $CollectionId,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbStoredProcedureIdValid -Id $_ })]
        [System.String]
        $Id,

        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $StoredProcedureBody
    )

    $null = $PSBoundParameters.Remove('CollectionId')
    $null = $PSBoundParameters.Remove('Id')
    $null = $PSBoundParameters.Remove('StoredProcedureBody')

    $resourcePath = ('colls/{0}/sprocs' -f $CollectionId)

    $requestBody = Convert-CosmosDbRequestBody -RequestBodyObject @{
        id = $id
        body = $StoredProcedureBody
    }

    $result = Invoke-CosmosDbRequest @PSBoundParameters `
        -Method 'Post' `
        -ResourceType 'sprocs' `
        -ResourcePath $resourcePath `
        -Body $requestBody

    $storedProcedure = ConvertFrom-Json -InputObject $result.Content

    if ($storedProcedure)
    {
        return (Set-CosmosDbStoredProcedureType -StoredProcedure $storedProcedure)
    }
}

function Remove-CosmosDbStoredProcedure
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ -ArgumentName 'CollectionId' })]
        [System.String]
        $CollectionId,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbStoredProcedureIdValid -Id $_ })]
        [System.String]
        $Id
    )

    $null = $PSBoundParameters.Remove('CollectionId')
    $null = $PSBoundParameters.Remove('Id')

    $resourcePath = ('colls/{0}/sprocs/{1}' -f $CollectionId, $Id)

    $null = Invoke-CosmosDbRequest @PSBoundParameters `
        -Method 'Delete' `
        -ResourceType 'sprocs' `
        -ResourcePath $resourcePath
}

function Set-CosmosDbStoredProcedure
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([Object])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter(ParameterSetName = 'Account')]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ -ArgumentName 'CollectionId' })]
        [System.String]
        $CollectionId,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbStoredProcedureIdValid -Id $_ })]
        [System.String]
        $Id,

        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $StoredProcedureBody
    )

    $null = $PSBoundParameters.Remove('CollectionId')
    $null = $PSBoundParameters.Remove('Id')
    $null = $PSBoundParameters.Remove('StoredProcedureBody')

    $resourcePath = ('colls/{0}/sprocs/{1}' -f $CollectionId, $Id)

    $requestBody = Convert-CosmosDbRequestBody -RequestBodyObject @{
        id = $id
        body = $StoredProcedureBody
    }

    $result = Invoke-CosmosDbRequest @PSBoundParameters `
        -Method 'Put' `
        -ResourceType 'sprocs' `
        -ResourcePath $resourcePath `
        -Body $requestBody

    $storedProcedure = ConvertFrom-Json -InputObject $result.Content

    if ($storedProcedure)
    {
        return (Set-CosmosDbStoredProcedureType -StoredProcedure $storedProcedure)
    }
}

function Set-CosmosDbStoredProcedureType
{

    [CmdletBinding()]
    param
    (
        [Parameter(Mandatory = $true)]
        $StoredProcedure
    )

    foreach ($item in $StoredProcedure)
    {
        $item.PSObject.TypeNames.Insert(0, 'CosmosDB.StoredProcedure')
    }

    return $StoredProcedure
}

<#
    .SYNOPSIS
    Helper function that asserts a Cosmos DB Trigger Id is valid.
#>

function Assert-CosmosDbTriggerIdValid
{

    [CmdletBinding()]
    [OutputType([System.Boolean])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $Id,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $ArgumentName = 'Id'
    )

    $matches = [regex]::Match($Id,"[^\\/#?]{1,255}(?<!\s)")
    if ($matches.value -ne $Id)
    {
        New-CosmosDbInvalidArgumentException `
            -Message $($LocalizedData.TriggerIdInvalid -f $Id) `
            -ArgumentName $ArgumentName
    }

    return $true
}

function Get-CosmosDbTrigger
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([Object])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ -ArgumentName 'CollectionId' })]
        [System.String]
        $CollectionId,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbTriggerIdValid -Id $_ })]
        [System.String]
        $Id
    )

    $null = $PSBoundParameters.Remove('CollectionId')

    $resourcePath = ('colls/{0}/triggers' -f $CollectionId)

    if ($PSBoundParameters.ContainsKey('Id'))
    {
        $null = $PSBoundParameters.Remove('Id')

        $result = Invoke-CosmosDbRequest @PSBoundParameters `
            -Method 'Get' `
            -ResourceType 'triggers' `
            -ResourcePath ('{0}/{1}' -f $resourcePath, $Id)

        $trigger = ConvertFrom-Json -InputObject $result.Content
    }
    else
    {
        $result = Invoke-CosmosDbRequest @PSBoundParameters `
            -Method 'Get' `
            -ResourceType 'triggers' `
            -ResourcePath $resourcePath

        $body = ConvertFrom-Json -InputObject $result.Content
        $trigger = $body.Triggers
    }

    if ($trigger)
    {
        return (Set-CosmosDbTriggerType -Trigger $trigger)
    }
}

function Get-CosmosDbTriggerResourcePath
{

    [CmdletBinding()]
    [OutputType([System.String])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ -ArgumentName 'CollectionId' })]
        [System.String]
        $CollectionId,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbTriggerIdValid -Id $_ })]
        [System.String]
        $Id
    )

    return ('dbs/{0}/colls/{1}/triggers/{2}' -f $Database, $CollectionId, $Id)
}

function New-CosmosDbTrigger
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([Object])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ -ArgumentName 'CollectionId' })]
        [System.String]
        $CollectionId,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbTriggerIdValid -Id $_ })]
        [System.String]
        $Id,

        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $TriggerBody,

        [Parameter(Mandatory = $true)]
        [ValidateSet('All', 'Create', 'Replace', 'Delete')]
        [System.String]
        $TriggerOperation,

        [Parameter(Mandatory = $true)]
        [ValidateSet('Pre', 'Post')]
        [System.String]
        $TriggerType
    )

    $null = $PSBoundParameters.Remove('CollectionId')
    $null = $PSBoundParameters.Remove('Id')
    $null = $PSBoundParameters.Remove('TriggerBody')
    $null = $PSBoundParameters.Remove('TriggerOperation')
    $null = $PSBoundParameters.Remove('TriggerType')

    $resourcePath = ('colls/{0}/triggers' -f $CollectionId)

    $TriggerBody = ((($TriggerBody -replace '`n', '\n') -replace '`r', '\r') -replace '"', '\"')

    $result = Invoke-CosmosDbRequest @PSBoundParameters `
        -Method 'Post' `
        -ResourceType 'triggers' `
        -ResourcePath $resourcePath `
        -Body "{ `"id`": `"$id`", `"body`" : `"$TriggerBody`", `"triggerOperation`" : `"$triggerOperation`", `"triggerType`" : `"$triggerType`" }"

    $trigger = ConvertFrom-Json -InputObject $result.Content

    if ($trigger)
    {
        return (Set-CosmosDbTriggerType -Trigger $trigger)
    }
}

function Remove-CosmosDbTrigger
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ -ArgumentName 'CollectionId' })]
        [System.String]
        $CollectionId,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbTriggerIdValid -Id $_ })]
        [System.String]
        $Id
    )

    $null = $PSBoundParameters.Remove('CollectionId')
    $null = $PSBoundParameters.Remove('Id')

    $resourcePath = ('colls/{0}/triggers/{1}' -f $CollectionId, $Id)

    $null = Invoke-CosmosDbRequest @PSBoundParameters `
        -Method 'Delete' `
        -ResourceType 'triggers' `
        -ResourcePath $resourcePath
}

function Set-CosmosDbTrigger
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([Object])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter(ParameterSetName = 'Account')]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ -ArgumentName 'CollectionId' })]
        [System.String]
        $CollectionId,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbTriggerIdValid -Id $_ })]
        [System.String]
        $Id,

        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $TriggerBody,

        [Parameter(Mandatory = $true)]
        [ValidateSet('All', 'Create', 'Replace', 'Delete')]
        [System.String]
        $TriggerOperation,

        [Parameter(Mandatory = $true)]
        [ValidateSet('Pre', 'Post')]
        [System.String]
        $TriggerType
    )

    $null = $PSBoundParameters.Remove('CollectionId')
    $null = $PSBoundParameters.Remove('Id')
    $null = $PSBoundParameters.Remove('TriggerBody')
    $null = $PSBoundParameters.Remove('TriggerOperation')
    $null = $PSBoundParameters.Remove('TriggerType')

    $resourcePath = ('colls/{0}/triggers/{1}' -f $CollectionId, $Id)

    $TriggerBody = ((($TriggerBody -replace '`n', '\n') -replace '`r', '\r') -replace '"', '\"')

    $result = Invoke-CosmosDbRequest @PSBoundParameters `
        -Method 'Put' `
        -ResourceType 'triggers' `
        -ResourcePath $resourcePath `
        -Body "{ `"id`": `"$id`", `"body`" : `"$TriggerBody`", `"triggerOperation`" : `"$triggerOperation`", `"triggerType`" : `"$triggerType`" }"

    $trigger = ConvertFrom-Json -InputObject $result.Content

    if ($trigger)
    {
        return (Set-CosmosDbTriggerType -Trigger $trigger)
    }
}

function Set-CosmosDbTriggerType
{

    [CmdletBinding()]
    param
    (
        [Parameter(Mandatory = $true)]
        $Trigger
    )

    foreach ($item in $Trigger)
    {
        $item.PSObject.TypeNames.Insert(0, 'CosmosDB.Trigger')
    }

    return $Trigger
}

<#
    .SYNOPSIS
    Helper function that asserts a Cosmos DB User Defined Function Id is valid.
#>

function Assert-CosmosDbUserDefinedFunctionIdValid
{

    [CmdletBinding()]
    [OutputType([System.Boolean])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $Id,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $ArgumentName = 'Id'
    )

    $matches = [regex]::Match($Id,"[^\\/#?]{1,255}(?<!\s)")
    if ($matches.value -ne $Id)
    {
        New-CosmosDbInvalidArgumentException `
            -Message $($LocalizedData.UserDefinedFunctionIdInvalid -f $Id) `
            -ArgumentName $ArgumentName
    }

    return $true
}

function Get-CosmosDbUserDefinedFunction
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([Object])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ -ArgumentName 'CollectionId' })]
        [System.String]
        $CollectionId,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbUserDefinedFunctionIdValid -Id $_ })]
        [System.String]
        $Id
    )

    $null = $PSBoundParameters.Remove('CollectionId')

    $resourcePath = ('colls/{0}/udfs' -f $CollectionId)

    if ($PSBoundParameters.ContainsKey('Id'))
    {
        $null = $PSBoundParameters.Remove('Id')

        $result = Invoke-CosmosDbRequest @PSBoundParameters `
            -Method 'Get' `
            -ResourceType 'udfs' `
            -ResourcePath ('{0}/{1}' -f $resourcePath, $Id)

        $userDefinedFunction = ConvertFrom-Json -InputObject $result.Content
    }
    else
    {
        $result = Invoke-CosmosDbRequest @PSBoundParameters `
            -Method 'Get' `
            -ResourceType 'udfs' `
            -ResourcePath $resourcePath

        $body = ConvertFrom-Json -InputObject $result.Content
        $userDefinedFunction = $body.UserDefinedFunctions
    }

    if ($userDefinedFunction)
    {
        return (Set-CosmosDbUserDefinedFunctionType -UserDefinedFunction $userDefinedFunction)
    }
}

function Get-CosmosDbUserDefinedFunctionResourcePath
{

    [CmdletBinding()]
    [OutputType([System.String])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ -ArgumentName 'CollectionId' })]
        [System.String]
        $CollectionId,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbUserDefinedFunctionIdValid -Id $_ })]
        [System.String]
        $Id
    )

    return ('dbs/{0}/colls/{1}/udfs/{2}' -f $Database, $CollectionId, $Id)
}

function New-CosmosDbUserDefinedFunction
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([Object])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ -ArgumentName 'CollectionId' })]
        [System.String]
        $CollectionId,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbUserDefinedFunctionIdValid -Id $_ })]
        [System.String]
        $Id,

        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $UserDefinedFunctionBody
    )

    $null = $PSBoundParameters.Remove('CollectionId')
    $null = $PSBoundParameters.Remove('Id')
    $null = $PSBoundParameters.Remove('UserDefinedFunctionBody')

    $resourcePath = ('colls/{0}/udfs' -f $CollectionId)

    $UserDefinedFunctionBody = ((($UserDefinedFunctionBody -replace '`n', '\n') -replace '`r', '\r') -replace '"', '\"')

    $result = Invoke-CosmosDbRequest @PSBoundParameters `
        -Method 'Post' `
        -ResourceType 'udfs' `
        -ResourcePath $resourcePath `
        -Body "{ `"id`": `"$id`", `"body`" : `"$UserDefinedFunctionBody`" }"

    $userDefinedFunction = ConvertFrom-Json -InputObject $result.Content

    if ($userDefinedFunction)
    {
        return (Set-CosmosDbUserDefinedFunctionType -UserDefinedFunction $userDefinedFunction)
    }
}

function Remove-CosmosDbUserDefinedFunction
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ -ArgumentName 'CollectionId' })]
        [System.String]
        $CollectionId,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbUserDefinedFunctionIdValid -Id $_ })]
        [System.String]
        $Id
    )

    $null = $PSBoundParameters.Remove('CollectionId')
    $null = $PSBoundParameters.Remove('Id')

    $resourcePath = ('colls/{0}/udfs/{1}' -f $CollectionId, $Id)

    $null = Invoke-CosmosDbRequest @PSBoundParameters `
        -Method 'Delete' `
        -ResourceType 'udfs' `
        -ResourcePath $resourcePath
}

function Set-CosmosDbUserDefinedFunction
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([Object])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter(ParameterSetName = 'Account')]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbCollectionIdValid -Id $_ -ArgumentName 'CollectionId' })]
        [System.String]
        $CollectionId,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbUserDefinedFunctionIdValid -Id $_ })]
        [System.String]
        $Id,

        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $UserDefinedFunctionBody
    )

    $null = $PSBoundParameters.Remove('CollectionId')
    $null = $PSBoundParameters.Remove('Id')
    $null = $PSBoundParameters.Remove('UserDefinedFunctionBody')

    $resourcePath = ('colls/{0}/udfs/{1}' -f $CollectionId, $Id)

    $UserDefinedFunctionBody = ((($UserDefinedFunctionBody -replace '`n', '\n') -replace '`r', '\r') -replace '"', '\"')

    $result = Invoke-CosmosDbRequest @PSBoundParameters `
        -Method 'Put' `
        -ResourceType 'udfs' `
        -ResourcePath $resourcePath `
        -Body "{ `"id`": `"$id`", `"body`" : `"$UserDefinedFunctionBody`" }"

    $userDefinedFunction = ConvertFrom-Json -InputObject $result.Content

    if ($userDefinedFunction)
    {
        return (Set-CosmosDbUserDefinedFunctionType -UserDefinedFunction $userDefinedFunction)
    }
}

function Set-CosmosDbUserDefinedFunctionType
{

    [CmdletBinding()]
    param
    (
        [Parameter(Mandatory = $true)]
        $UserDefinedFunction
    )

    foreach ($item in $UserDefinedFunction)
    {
        $item.PSObject.TypeNames.Insert(0, 'CosmosDB.UserDefinedFunction')
    }

    return $UserDefinedFunction
}

<#
    .SYNOPSIS
    Helper function that asserts a Cosmos DB User Id is valid.
#>

function Assert-CosmosDbUserIdValid
{

    [CmdletBinding()]
    [OutputType([System.Boolean])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $Id,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $ArgumentName = 'Id'
    )

    $matches = [regex]::Match($Id,"[^\\/#?]{1,255}(?<!\s)")
    if ($matches.value -ne $Id)
    {
        New-CosmosDbInvalidArgumentException `
            -Message $($LocalizedData.UserIdInvalid -f $Id) `
            -ArgumentName $ArgumentName
    }

    return $true
}

function Get-CosmosDbUser
{
    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([Object])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter(ParameterSetName = 'Account')]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbUserIdValid -Id $_ })]
        [System.String]
        $Id
    )

    if ($PSBoundParameters.ContainsKey('Id'))
    {
        $null = $PSBoundParameters.Remove('Id')

        $result = Invoke-CosmosDbRequest @PSBoundParameters `
            -Method 'Get' `
            -ResourceType 'users' `
            -ResourcePath ('users/{0}' -f $Id)

        $user = ConvertFrom-Json -InputObject $result.Content
    }
    else
    {
        $result = Invoke-CosmosDbRequest @PSBoundParameters `
            -Method 'Get' `
            -ResourceType 'users'

        $body = ConvertFrom-Json -InputObject $result.Content

        $user = $body.Users
    }

    if ($user)
    {
        return (Set-CosmosDbUserType -User $user)
    }
}

function Get-CosmosDbUserResourcePath
{

    [CmdletBinding()]
    [OutputType([System.String])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbUserIdValid -Id $_ })]
        [System.String]
        $Id
    )

    return ('dbs/{0}/users/{1}' -f $Database, $Id)
}

function New-CosmosDbUser
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([Object])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbUserIdValid -Id $_ })]
        [System.String]
        $Id
    )

    $null = $PSBoundParameters.Remove('Id')

    $result = Invoke-CosmosDbRequest @PSBoundParameters `
        -Method 'Post' `
        -ResourceType 'users' `
        -Body "{ `"id`": `"$Id`" }"

    $user = ConvertFrom-Json -InputObject $result.Content

    if ($user)
    {
        return (Set-CosmosDbUserType -User $user)
    }
}

function Remove-CosmosDbUser
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter(ParameterSetName = 'Account')]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbUserIdValid -Id $_ })]
        [System.String]
        $Id
    )

    $null = $PSBoundParameters.Remove('Id')

    $null = Invoke-CosmosDbRequest @PSBoundParameters `
        -Method 'Delete' `
        -ResourceType 'users' `
        -ResourcePath ('users/{0}' -f $Id)
}

function Set-CosmosDbUser
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([Object])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDb.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ -ArgumentName 'Account' })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ -ArgumentName 'Database' })]
        [System.String]
        $Database,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter(ParameterSetName = 'Account')]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbUserIdValid -Id $_ })]
        [System.String]
        $Id,

        [Parameter(Mandatory = $true)]
        [ValidateScript({ Assert-CosmosDbUserIdValid -Id $_ -ArgumentName 'NewId' })]
        [System.String]
        $NewId
    )

    $null = $PSBoundParameters.Remove('Id')
    $null = $PSBoundParameters.Remove('NewId')

    $result = Invoke-CosmosDbRequest @PSBoundParameters `
        -Method 'Put' `
        -ResourceType 'users' `
        -ResourcePath ('users/{0}' -f $Id) `
        -Body "{ `"id`": `"$NewId`" }"

    $user = ConvertFrom-Json -InputObject $result.Content

    if ($user)
    {
        return (Set-CosmosDbUserType -User $user)
    }
}

function Set-CosmosDbUserType
{

    [CmdletBinding()]
    param
    (
        [Parameter(Mandatory = $true)]
        $User
    )

    foreach ($item in $User)
    {
        $item.PSObject.TypeNames.Insert(0, 'CosmosDB.User')
    }

    return $User
}

function Convert-CosmosDbRequestBody
{

    [CmdletBinding()]
    [OutputType([System.String])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateNotNull()]
        [System.Object]
        $RequestBodyObject
    )

    <#
        On PowerShell Core 6.0.x, ConvertTo-Json does not correctly escape this
        string. See https://github.com/PowerShell/PowerShell/issues/7693
 
        This means that on PowerShell Core, certain strings when passed as
        Stored Procedure or Function bodies will not be accepted.
 
        This means that this issue https://github.com/PlagueHO/CosmosDB/issues/137
        needs to remain open.
    #>

    return ConvertTo-Json -InputObject $RequestBodyObject -Depth 100 -Compress
}

function ConvertTo-CosmosDbTokenDateString
{

    [CmdletBinding()]
    [OutputType([System.String])]
    param
    (
        [Parameter(Mandatory = $true)]
        [System.DateTime]
        $Date
    )

    return $Date.ToUniversalTime().ToString("r", [System.Globalization.CultureInfo]::InvariantCulture)
}

function Get-CosmosDbBackoffDelay
{

    [CmdletBinding()]
    [OutputType([System.Int32])]
    param
    (
        [Parameter()]
        [CosmosDB.BackoffPolicy]
        $BackoffPolicy,

        [Parameter()]
        [System.Int32]
        $Retry = 0,

        [Parameter()]
        [System.Int32]
        $RequestedDelay = 0
    )

    if ($null -ne $BackoffPolicy)
    {
        # A back-off policy has been provided
        Write-Verbose -Message $($LocalizedData.CollectionProvisionedThroughputExceededWithBackoffPolicy)

        if ($Retry -le $BackoffPolicy.MaxRetries)
        {
            switch ($BackoffPolicy.Method)
            {
                'Default'
                {
                    $backoffPolicyDelay = $backoffPolicy.Delay
                }

                'Additive'
                {
                    $backoffPolicyDelay = $RequestedDelay + $backoffPolicy.Delay
                }

                'Linear'
                {
                    $backoffPolicyDelay = $backoffPolicy.Delay * ($Retry + 1)
                }

                'Exponential'
                {
                    $backoffPolicyDelay = $backoffPolicy.Delay * [Math]::pow(($Retry + 1),2)
                }

                'Random'
                {
                    $backoffDelayMin = -($backoffPolicy.Delay/2)
                    $backoffDelayMax = $backoffPolicy.Delay/2
                    $backoffPolicyDelay = $backoffPolicy.Delay + (Get-Random -Minimum $backoffDelayMin -Maximum $backoffDelayMax)
                }
            }

            if ($backoffPolicyDelay -gt $RequestedDelay)
            {
                $delay = $backoffPolicyDelay
                Write-Verbose -Message $($LocalizedData.BackOffPolicyAppliedPolicyDelay -f $BackoffPolicy.Method, $backoffPolicyDelay, $requestedDelay)
            }
            else
            {
                $delay = $requestedDelay
                Write-Verbose -Message $($LocalizedData.BackOffPolicyAppliedRequestedDelay -f $BackoffPolicy.Method, $backoffPolicyDelay, $requestedDelay)
            }

            return $delay
        }
        else
        {
            Write-Verbose -Message $($LocalizedData.CollectionProvisionedThroughputExceededMaxRetriesHit -f $BackoffPolicy.MaxRetries)
            return $null
        }
    }
    else
    {
        # A back-off policy has not been defined
        Write-Verbose -Message $($LocalizedData.CollectionProvisionedThroughputExceededNoBackoffPolicy)
        return $null
    }
}

function Get-CosmosDbUri
{

    [CmdletBinding()]
    [OutputType([uri])]
    param
    (
        [Parameter(Mandatory = $true)]
        [System.String]
        $Account,

        [Parameter()]
        [System.String]
        $BaseUri = 'documents.azure.com'
    )

    return [uri]::new(('https://{0}.{1}' -f $Account, $BaseUri))
}

function Invoke-CosmosDbRequest
{

    [CmdletBinding(DefaultParameterSetName = 'Context')]
    [OutputType([System.String])]
    param
    (
        [Alias("Connection")]
        [Parameter(Mandatory = $true, ParameterSetName = 'Context')]
        [ValidateNotNullOrEmpty()]
        [CosmosDB.Context]
        $Context,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $Account,

        [Parameter()]
        [System.String]
        $Database,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter()]
        [ValidateSet('Delete', 'Get', 'Head', 'Merge', 'Options', 'Patch', 'Post', 'Put', 'Trace')]
        [System.String]
        $Method = 'Get',

        [Parameter(Mandatory = $True)]
        [ValidateSet('attachments', 'colls', 'dbs', 'docs', 'users', 'permissions', 'triggers', 'sprocs', 'udfs', 'offers')]
        [System.String]
        $ResourceType,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $ResourcePath,

        [Parameter()]
        [System.String]
        $Body = '',

        [Parameter()]
        [ValidateSet('2014-08-21', '2015-04-08', '2015-06-03', '2015-08-06', '2015-12-16', '2016-07-11', '2017-01-19', '2017-02-22')]
        [System.String]
        $ApiVersion = '2017-02-22',

        [Parameter()]
        [Hashtable]
        $Headers = @{},

        [Parameter()]
        [System.String]
        $ContentType = 'application/json',

        [Parameter()]
        [ValidateSet('Default', 'UTF-8')]
        [System.String]
        $Encoding = 'Default'
    )

    if ($PSCmdlet.ParameterSetName -eq 'Account')
    {
        $Context = New-CosmosDbContext -Account $Account -Database $Database -Key $Key -KeyType $KeyType
    }

    if (-not ($PSBoundParameters.ContainsKey('Database')))
    {
        $Database = $Context.Database
    }

    # Generate the resource link value that will be used in the URI and to generate the resource id
    switch ($resourceType)
    {
        'dbs'
        {
            # Request for a database object (not containined in a database)
            if ([String]::IsNullOrEmpty($ResourcePath))
            {
                $ResourceLink = 'dbs'
            }
            else
            {
                $resourceLink = $ResourcePath
                $resourceId = $resourceLink
            }
        }

        'offers'
        {
            # Request for an offer object (not contained in a database)
            if ([String]::IsNullOrEmpty($ResourcePath))
            {
                $ResourceLink = 'offers'
            }
            else
            {
                $resourceLink = $ResourcePath
                $resourceId = ($ResourceLink -split '/')[1].ToLowerInvariant()
            }
        }

        default
        {
            # Request for an object that is within a database
            $resourceLink = ('dbs/{0}' -f $Database)

            if ($PSBoundParameters.ContainsKey('ResourcePath'))
            {
                $resourceLink = ('{0}/{1}' -f $resourceLink, $ResourcePath)
            }
            else
            {
                $resourceLink = ('{0}/{1}' -f $resourceLink, $ResourceType)
            }

            # Generate the resource Id from the resource link value
            $resourceElements = [System.Collections.ArrayList] ($resourceLink -split '/')

            if (($resourceElements.Count % 2) -eq 0)
            {
                $resourceId = $resourceLink
            }
            else
            {
                $resourceElements.RemoveAt($resourceElements.Count - 1)
                $resourceId = $resourceElements -Join '/'
            }
        }
    }

    # Generate the URI from the base connection URI and the resource link
    $baseUri = $Context.BaseUri.ToString()
    $uri = [uri]::New(('{0}{1}' -f $baseUri, $resourceLink))

    # Determine the token to use to gain access to the resource
    $token = $null

    if ($null -ne $Context.Token)
    {
        Write-Verbose -Message $($LocalizedData.FindResourceTokenInContext -f $resourceLink)

        # Find the most recent token non-expired matching the resource link
        $matchToken = $context.Token |
            Where-Object -FilterScript { $_.Resource -eq $resourceLink }

        if ($matchToken)
        {
            # One or more matching tokens could be found
            Write-Verbose -Message $($LocalizedData.FoundResourceTokenInContext -f $matchToken.Count, $matchToken.Resource)

            $now = (Get-Date)
            $validToken = $matchToken |
                Where-Object -FilterScript { $_.Expires -gt $now } |
                Sort-Object -Property Expires -Descending |
                Select-Object -First 1

            if ($validToken)
            {
                # One or more matching tokens could be found
                Write-Verbose -Message $($LocalizedData.FoundUnExpiredResourceTokenInContext -f $validToken.Resource, $validToken.TimeStamp)

                $BSTR = [System.Runtime.InteropServices.Marshal]::SecureStringToBSTR($validToken.Token)
                $decryptedToken = [System.Runtime.InteropServices.Marshal]::PtrToStringAuto($BSTR)
                $token = [System.Web.HttpUtility]::UrlEncode($decryptedToken)
                $date = $validToken.TimeStamp
                $dateString = ConvertTo-CosmosDbTokenDateString -Date $date
            }
            else
            {
                # No un-expired matching token could be found, so fall back to using a master key if possible
                Write-Verbose -Message $($LocalizedData.NoMatchingUnexpiredResourceTokenInContext -f $resourceLink)
            }
        }
        else
        {
            # No matching token could be found, so fall back to using a master key if possible
            Write-Verbose -Message $($LocalizedData.NotFoundResourceTokenInContext -f $resourceLink)
        }
    }

    if ($null -eq $token)
    {
        <#
            A token in the context that matched the resource link could not
            be found. So use the master key to generate the resource link.
        #>

        if (-not ($PSBoundParameters.ContainsKey('Key')))
        {
            if (-not [System.String]::IsNullOrEmpty($Context.Key))
            {
                $Key = $Context.Key
            }
        }

        if ([System.String]::IsNullOrEmpty($Key))
        {
            New-CosmosDbInvalidOperationException -Message ($LocalizedData.ErrorAuthorizationKeyEmpty)
        }

        # Generate the date used for the authorization token
        $date = Get-Date
        $dateString = ConvertTo-CosmosDbTokenDateString -Date $date

        $token = New-CosmosDbAuthorizationToken `
            -Key $Key `
            -KeyType $KeyType `
            -Method $Method `
            -ResourceType $ResourceType `
            -ResourceId $resourceId `
            -Date $date
    }

    $Headers += @{
        'authorization' = $token
        'x-ms-date'     = $dateString
        'x-ms-version'  = $ApiVersion
    }

    $invokeWebRequestParameters = @{
        Uri             = $uri
        Headers         = $Headers
        Method          = $method
        ContentType     = $ContentType
        UseBasicParsing = $true
    }

    if ($Method -in ('Put', 'Post', 'Patch'))
    {
        if ($Method -eq 'Patch')
        {
            $invokeWebRequestParameters['ContentType'] = 'application/json-patch+json'
        }

        if ($Encoding -eq 'UTF-8')
        {
            <#
                An encoding type of UTF-8 was passed so explictly set this in the
                request and convert to the body string to UTF8 bytes.
            #>

            $invokeWebRequestParameters['ContentType'] = ('{0}; charset={1}' -f $invokeWebRequestParameters['ContentType'], $Encoding)
            $invokeWebRequestParameters += @{
                Body = [System.Text.Encoding]::UTF8.GetBytes($Body)
            }
        }
        else
        {
            $invokeWebRequestParameters += @{
                Body = $Body
            }
        }
    }

    $requestComplete = $false
    $retry = 0

    <#
        This should initially be set to $false and changed to $true when fatal error
        is caught
    #>

    $fatal = $false

    do
    {
        try
        {

            $requestResult = Invoke-WebRequest @invokeWebRequestParameters
            $requestComplete = $true
        }
        catch [System.Net.WebException],[Microsoft.PowerShell.Commands.HttpResponseException]
        {
            if ($_.Exception.Response.StatusCode -eq 429)
            {
                <#
                    The exception was caused by exceeding provisioned throughput
                    so determine is we should delay and try again or exit
                #>

                [System.Int32] $retryAfter = ($_.Exception.Response.Headers | Where-Object -Property Key -eq 'x-ms-retry-after-ms').Value[0]

                $delay = Get-CosmosDbBackoffDelay `
                    -BackOffPolicy $Context.BackoffPolicy `
                    -Retry $retry `
                    -RequestedDelay $retryAfter

                # A null delay means retries have been exceeded or no back-off policy specified
                if ($null -ne $delay)
                {
                    $retry++
                    Write-Verbose -Message $($LocalizedData.WaitingBackoffPolicyDelay -f $retry, $delay)
                    Start-Sleep -Milliseconds $delay
                    continue
                }
            }

            if ($_.Exception.Response)
            {
                <#
                    Write out additional exception information into the verbose stream
                    In a future version a custom exception type for CosmosDB that
                    contains this additional information.
                #>


                if($PSEdition -eq 'Core')
                {
                    # https://get-powershellblog.blogspot.com/2017/11/powershell-core-web-cmdlets-in-depth.html#L13
                    $exceptionResponse = $_.ErrorDetails
                }
                else
                {
                    $exceptionStream = $_.Exception.Response.GetResponseStream()
                    $streamReader = New-Object -TypeName System.IO.StreamReader -ArgumentList $exceptionStream
                    $exceptionResponse = $streamReader.ReadToEnd()
                }

                if ($exceptionResponse)
                {
                    Write-Verbose -Message $exceptionResponse
                }
            }

            # A non-recoverable exception occurred
            $fatal = $true

            Throw $_
        }
        catch
        {
            # A non-recoverable exception occurred
            $fatal = $true

            Throw $_
        }
    } while ($requestComplete -eq $false -and -not $fatal)

    # Display the Request Charge as a verbose message
    $requestCharge = [Uri]::UnescapeDataString($requestResult.Headers.'x-ms-request-charge').Trim()
    if ($requestCharge)
    {
        Write-Verbose -Message $($LocalizedData.RequestChargeResults -f $method, $uri, $requestCharge)
    }

    return $requestResult
}

function New-CosmosDbAuthorizationToken
{

    [CmdletBinding()]
    [OutputType([System.String])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter()]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Parameter()]
        [ValidateSet('', 'Delete', 'Get', 'Head', 'Merge', 'Options', 'Patch', 'Post', 'Put', 'Trace')]
        [System.String]
        $Method = '',

        [Parameter()]
        [System.String]
        $ResourceType = '',

        [Parameter()]
        [System.String]
        $ResourceId = '',

        [Parameter(Mandatory = $true)]
        [System.DateTime]
        $Date,

        [Parameter()]
        [ValidateSet('1.0')]
        [System.String]
        $TokenVersion = '1.0'
    )

    Write-Verbose -Message $($LocalizedData.CreateAuthorizationToken -f $Method, $ResourceType, $ResourceId, $Date)

    $BSTR = [System.Runtime.InteropServices.Marshal]::SecureStringToBSTR($Key)
    $decryptedKey = [System.Runtime.InteropServices.Marshal]::PtrToStringAuto($BSTR)
    $base64Key = [System.Convert]::FromBase64String($decryptedKey)
    $hmacSha256 = New-Object -TypeName System.Security.Cryptography.HMACSHA256 -ArgumentList (, $base64Key)
    $dateString = ConvertTo-CosmosDbTokenDateString -Date $Date
    $payLoad = @(
        $Method.ToLowerInvariant() + "`n" + `
            $ResourceType.ToLowerInvariant() + "`n" + `
            $ResourceId + "`n" + `
            $dateString.ToLowerInvariant() + "`n" + `
            "" + "`n"
    )

    $body = [System.Text.Encoding]::UTF8.GetBytes($payLoad)
    $hashPayLoad = $hmacSha256.ComputeHash($body)
    $signature = [Convert]::ToBase64String($hashPayLoad)

    Add-Type -AssemblyName 'System.Web'
    $token = [System.Web.HttpUtility]::UrlEncode(('type={0}&ver={1}&sig={2}' -f $KeyType, $TokenVersion, $signature))
    return $token
}

function New-CosmosDbBackoffPolicy
{

    [CmdletBinding()]
    [OutputType([System.Management.Automation.PSCustomObject])]
    param
    (
        [Parameter()]
        [System.Int32]
        $MaxRetries = 10,

        [Parameter()]
        [ValidateSet('Default', 'Additive', 'Linear', 'Exponential', 'Random')]
        [System.String]
        $Method = 'Default',

        [Parameter()]
        [ValidateRange(0, 3600000)]
        [System.Int32]
        $Delay = 0
    )

    $backoffPolicy = New-Object -TypeName 'CosmosDB.BackoffPolicy' -Property @{
        MaxRetries = $MaxRetries
        Method     = $Method
        Delay      = $Delay
    }

    return $backoffPolicy
}

function New-CosmosDbContext
{
    [CmdletBinding(
        SupportsShouldProcess = $true,
        DefaultParameterSetName = 'Account'
    )]
    [OutputType([System.Management.Automation.PSCustomObject])]
    [Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSAvoidUsingConvertToSecureStringWithPlainText', '', Scope = 'Function')]
    param
    (
        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [Parameter(Mandatory = $true, ParameterSetName = 'Token')]
        [Parameter(Mandatory = $true, ParameterSetName = 'AzureAccount')]
        [ValidateScript({ Assert-CosmosDbAccountNameValid -Name $_ })]
        [System.String]
        $Account,

        [Parameter()]
        [ValidateScript({ Assert-CosmosDbDatabaseIdValid -Id $_ })]
        [System.String]
        $Database,

        [Parameter(Mandatory = $true, ParameterSetName = 'Account')]
        [Parameter(ParameterSetName = 'Emulator')]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Key,

        [Parameter(ParameterSetName = 'Account')]
        [ValidateSet('master', 'resource')]
        [System.String]
        $KeyType = 'master',

        [Alias("ResourceGroup")]
        [Parameter(Mandatory = $true, ParameterSetName = 'AzureAccount')]
        [ValidateScript({ Assert-CosmosDbResourceGroupNameValid -ResourceGroupName $_ })]
        [System.String]
        $ResourceGroupName,

        [Parameter(ParameterSetName = 'AzureAccount')]
        [ValidateSet('PrimaryMasterKey', 'SecondaryMasterKey', 'PrimaryReadonlyMasterKey', 'SecondaryReadonlyMasterKey')]
        [System.String]
        $MasterKeyType = 'PrimaryMasterKey',

        [Parameter(ParameterSetName = 'Emulator')]
        [Switch]
        $Emulator,

        [Parameter(ParameterSetName = 'Emulator')]
        [System.Int16]
        $Port = 8081,

        [Parameter(ParameterSetName = 'Emulator')]
        [System.String]
        $URI = 'localhost',

        [Parameter(Mandatory = $true, ParameterSetName = 'Token')]
        [Parameter(ParameterSetName = 'Emulator')]
        [ValidateNotNullOrEmpty()]
        [CosmosDB.ContextToken[]]
        $Token,

        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [CosmosDB.BackoffPolicy]
        $BackoffPolicy
    )

    switch ($PSCmdlet.ParameterSetName)
    {
        'Emulator'
        {
            $Account = 'emulator'

            if (-not ($PSBoundParameters.ContainsKey('Key')))
            {
                # This is a publically known fixed master key (see https://docs.microsoft.com/en-us/azure/cosmos-db/local-emulator#authenticating-requests)
                $Key = ConvertTo-SecureString `
                    -String 'C2y6yDjf5/R+ob0N8A7Cgv30VRDJIWEHLM+4QDU5DE2nQ9nDuVTqobD4b8mGGyPMbIZnqyMsEcaGQy67XIw/Jw==' `
                    -AsPlainText `
                    -Force
            }

            $BaseUri = [uri]::new(('https://{0}:{1}' -f $URI, $Port))
        }

        'AzureAccount'
        {
            try
            {
                $null = Get-AzContext -ErrorAction SilentlyContinue
            }
            catch
            {
                $null = Connect-AzAccount
            }

            $Key = Get-CosmosDbAccountMasterKey `
                -ResourceGroupName $ResourceGroupName `
                -Name $Account `
                -MasterKeyType $MasterKeyType

            $BaseUri = (Get-CosmosDbUri -Account $Account)
        }

        'Account'
        {
            $BaseUri = (Get-CosmosDbUri -Account $Account)
        }

        'Token'
        {
            $BaseUri = (Get-CosmosDbUri -Account $Account)
        }
    }

    if ($PSCmdlet.ShouldProcess('Azure', ($LocalizedData.ShouldCreateAzureCosmosDBContext -f $Account, $Database, $BaseUri)))
    {
        $context = New-Object -TypeName 'CosmosDB.Context' -Property @{
            Account       = $Account
            Database      = $Database
            Key           = $Key
            KeyType       = $KeyType
            BaseUri       = $BaseUri
            Token         = $Token
            BackoffPolicy = $BackoffPolicy
        }

        return $context
    }
}

function New-CosmosDbContextToken
{

    [CmdletBinding()]
    [OutputType([System.Management.Automation.PSCustomObject])]
    [Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSAvoidUsingConvertToSecureStringWithPlainText', '', Scope = 'Function')]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $Resource,

        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.DateTime]
        $TimeStamp,

        [Parameter()]
        [ValidateRange(600, 18000)]
        [System.Int32]
        $TokenExpiry = 3600,

        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.Security.SecureString]
        $Token
    )

    $contextToken = New-Object -TypeName 'CosmosDB.ContextToken' -Property @{
        Resource  = $Resource
        TimeStamp = $TimeStamp
        Expires   = $TimeStamp.AddSeconds($TokenExpiry)
        Token     = $Token
    }

    return $contextToken
}

function New-CosmosDbInvalidArgumentException
{

    [CmdletBinding()]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $Message,

        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $ArgumentName
    )

    $argumentException = New-Object -TypeName 'ArgumentException' -ArgumentList @( $Message,
        $ArgumentName )
    $newObjectParams = @{
        TypeName     = 'System.Management.Automation.ErrorRecord'
        ArgumentList = @( $argumentException, $ArgumentName, 'InvalidArgument', $null )
    }
    $errorRecord = New-Object @newObjectParams

    throw $errorRecord
}

function New-CosmosDbInvalidOperationException
{

    [CmdletBinding()]
    param
    (
        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $Message,

        [Parameter()]
        [ValidateNotNull()]
        [System.Management.Automation.ErrorRecord]
        $ErrorRecord
    )

    if ($null -eq $Message)
    {
        $invalidOperationException = New-Object -TypeName 'InvalidOperationException'
    }
    elseif ($null -eq $ErrorRecord)
    {
        $invalidOperationException =
        New-Object -TypeName 'InvalidOperationException' -ArgumentList @( $Message )
    }
    else
    {
        $invalidOperationException =
        New-Object -TypeName 'InvalidOperationException' -ArgumentList @( $Message,
            $ErrorRecord.Exception )
    }

    $newObjectParams = @{
        TypeName     = 'System.Management.Automation.ErrorRecord'
        ArgumentList = @( $invalidOperationException.ToString(), 'MachineStateIncorrect',
            'InvalidOperation', $null )
    }
    $errorRecordToThrow = New-Object @newObjectParams
    throw $errorRecordToThrow
}


#endregion

# Add Aliases
New-Alias -Name 'New-CosmosDbConnection' -Value 'New-CosmosDbContext' -Force