helpers/gcp/discover-gcp-resources-discover-then-add.ps1

# Configuration
$GCPKeyFilePath = "C:\path\to\service-account-key.json"  # Path to GCP service account JSON key
$GCPProjects    = @("your-project-id")                   # GCP project IDs to scan
$WUGServer      = "192.168.1.250"

# Credentials
if (!$WUGCred) { $WUGCred = Get-Credential -Message "Enter credentials for WUG server" }

# Check if required modules are installed and loaded
if (-not (Get-Module -Name WhatsUpGoldPS)) { Import-Module WhatsUpGoldPS }

if (-not (Get-Module -Name GoogleCloud -ListAvailable)) {
    throw "Required module 'GoogleCloud' is not installed. Run: Install-Module -Name GoogleCloud -Scope CurrentUser -Force"
}
if (-not (Get-Module -Name GoogleCloud)) { Import-Module GoogleCloud }

# Load helper functions
. "$PSScriptRoot\GCPHelpers.ps1"

# ========================
# Connect to GCP
# ========================
Write-Host "`n=== Connecting to GCP ===" -ForegroundColor Cyan
Connect-GCPAccount -KeyFilePath $GCPKeyFilePath -Project $GCPProjects[0]

# ========================
# Discover Resources and Collect IPs
# ========================
$allIPs = @()

foreach ($project in $GCPProjects) {
    Write-Host "`n=== Project: $project ===" -ForegroundColor Cyan

    # --- Compute Engine Instances ---
    Write-Host " Gathering Compute Engine instances..." -ForegroundColor Gray
    try {
        $vms = @(Get-GCPComputeInstances -Project $project)
        Write-Host " Found $($vms.Count) VM instances" -ForegroundColor Gray
        foreach ($vm in $vms) {
            $ip = Resolve-GCPResourceIP -ResourceType ComputeEngine -Resource $vm
            if ($ip -and $ip -match '^\d{1,3}(\.\d{1,3}){3}$') {
                Write-Host " $($vm.Name) -> $ip" -ForegroundColor DarkGray
                $allIPs += $ip
            } else {
                Write-Warning " Skipping VM $($vm.Name) - no resolvable IP"
            }
        }
    }
    catch {
        Write-Warning " Could not enumerate Compute Engine in $project : $($_.Exception.Message)"
    }

    # --- Cloud SQL Instances ---
    Write-Host " Gathering Cloud SQL instances..." -ForegroundColor Gray
    try {
        $sqlInstances = @(Get-GCPCloudSQLInstances -Project $project)
        Write-Host " Found $($sqlInstances.Count) Cloud SQL instances" -ForegroundColor Gray
        foreach ($db in $sqlInstances) {
            $ip = Resolve-GCPResourceIP -ResourceType CloudSQL -Resource $db
            if ($ip -and $ip -match '^\d{1,3}(\.\d{1,3}){3}$') {
                Write-Host " $($db.InstanceName) -> $ip" -ForegroundColor DarkGray
                $allIPs += $ip
            } else {
                Write-Warning " Skipping Cloud SQL $($db.InstanceName) - no resolvable IP"
            }
        }
    }
    catch {
        Write-Warning " Could not enumerate Cloud SQL in $project : $($_.Exception.Message)"
    }

    # --- Forwarding Rules (Load Balancers) ---
    Write-Host " Gathering Forwarding Rules (Load Balancers)..." -ForegroundColor Gray
    try {
        $lbs = @(Get-GCPForwardingRules -Project $project)
        Write-Host " Found $($lbs.Count) forwarding rules" -ForegroundColor Gray
        foreach ($lb in $lbs) {
            $ip = Resolve-GCPResourceIP -ResourceType ForwardingRule -Resource $lb
            if ($ip -and $ip -match '^\d{1,3}(\.\d{1,3}){3}$') {
                Write-Host " $($lb.Name) -> $ip" -ForegroundColor DarkGray
                $allIPs += $ip
            } else {
                Write-Warning " Skipping LB $($lb.Name) - no resolvable IP"
            }
        }
    }
    catch {
        Write-Warning " Could not enumerate forwarding rules in $project : $($_.Exception.Message)"
    }
}

# Deduplicate IPs
$allIPs = $allIPs | Select-Object -Unique

Write-Host "`n=== Discovery Summary ===" -ForegroundColor Cyan
Write-Host " Unique resolvable IPs: $($allIPs.Count)"

# ========================
# Add to WhatsUp Gold (bulk discover-then-add)
# ========================
Connect-WUGServer -serverUri $WUGServer -Credential $WUGCred -Protocol https -IgnoreSSLErrors

if ($allIPs.Count -gt 0) {
    Write-Host "`nAdding $($allIPs.Count) devices to WhatsUp Gold..." -ForegroundColor Cyan
    Add-WUGDevice -IpOrNames $allIPs
} else {
    Write-Warning "No valid IP addresses found to add."
}

# Cleanup
if ($Global:WUGConnection) {
    Disconnect-WUGServer
}

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