<#
.SYNOPSIS
  Export GraphQL schemas, pack subgraphs and compose the gateway (PowerShell).
.DESCRIPTION
  - Searches for FictionArchive.Service.* folders one directory above this script.
  - Reads skip-projects.txt next to the script.
  - Builds each service (Release).
  - Runs `dotnet run --no-build --no-launch-profile -- schema export` in each service to avoid running the web host.
  - Packs subgraphs.
  - Composes the gateway from FictionArchive.API.
#>

[CmdletBinding()]
param()

function Write-ErrExit {
    param($Message, $Code = 1)
    Write-Error $Message
    exit $Code
}

# Resolve directories
$ScriptDir = Split-Path -Parent $MyInvocation.MyCommand.Definition
$ServicesDir = Resolve-Path -Path (Join-Path $ScriptDir '..') -ErrorAction Stop
$ApiDir = Join-Path $ServicesDir 'FictionArchive.API'

Write-Host "Script dir: $ScriptDir"
Write-Host "Services dir: $ServicesDir"

# Load skip list
$SkipFile = Join-Path $ScriptDir 'gateway_skip.txt'
$SkipList = @()

Write-Host "----------------------------------------"
Write-Host "  Loading skip list..."
Write-Host "----------------------------------------"

if (Test-Path $SkipFile) {
    $SkipList = Get-Content $SkipFile |
                ForEach-Object { $_.Trim() } |
                Where-Object { $_ -and -not $_.StartsWith('#') }

    Write-Host "Skipping: $($SkipList -join ', ')"
} else {
    Write-Warning "skip-projects.txt not found — no services will be skipped."
}

# Find service directories
Write-Host
Write-Host "----------------------------------------"
Write-Host "  Finding GraphQL services..."
Write-Host "----------------------------------------"

$servicePattern = 'FictionArchive.Service.*'
$serviceDirs = Get-ChildItem -Path $ServicesDir -Directory -Filter 'FictionArchive.Service.*'

if (-not $serviceDirs) {
    Write-ErrExit "No service folders found matching FictionArchive.Service.* under $ServicesDir"
}

$selectedServices = @()

foreach ($d in $serviceDirs) {
    if ($SkipList -contains $d.Name) {
        Write-Host "Skipping: $($d.Name)"
        continue
    }

    Write-Host "Found: $($d.Name)"
    $selectedServices += $d.FullName
}

if (-not $selectedServices) {
    Write-ErrExit "All services skipped — nothing to do."
}

# Export schemas and pack subgraphs
Write-Host
Write-Host "----------------------------------------"
Write-Host "  Exporting schemas & packing subgraphs..."
Write-Host "----------------------------------------"

foreach ($svcPath in $selectedServices) {
    $svcName = Split-Path -Leaf $svcPath
    Write-Host "`nProcessing: $svcName"

    Push-Location $svcPath
    try {
        # Build Release
        Write-Host "Building $svcName..."
        dotnet build -c Release
        if ($LASTEXITCODE -ne 0) { Write-ErrExit "dotnet build failed for $svcName" }

        # Schema export using dotnet run (no server)
        Write-Host "Running schema export..."
        dotnet run --no-build --no-launch-profile -- schema export --output schema.graphql
        if ($LASTEXITCODE -ne 0) { Write-ErrExit "Schema export failed for $svcName" }

        # Pack subgraph
        Write-Host "Running fusion subgraph pack..."
        fusion subgraph pack
        if ($LASTEXITCODE -ne 0) { Write-ErrExit "fusion subgraph pack failed for $svcName" }

        Write-Host "Completed: $svcName"
    }
    finally {
        Pop-Location
    }
}

# Compose gateway
Write-Host
Write-Host "----------------------------------------"
Write-Host "  Running fusion compose..."
Write-Host "----------------------------------------"

if (-not (Test-Path $ApiDir)) {
    Write-ErrExit "API directory not found: $ApiDir"
}

Push-Location $ApiDir
try {
    if (Test-Path "gateway.fgp") { Remove-Item "gateway.fgp" -Force }

    foreach ($svcPath in $selectedServices) {
        $svcName = Split-Path -Leaf $svcPath
        Write-Host "Composing: $svcName"
        fusion compose -p gateway.fgp -s ("..\" + $svcName)
        if ($LASTEXITCODE -ne 0) { Write-ErrExit "fusion compose failed for $svcName" }
    }

    Write-Host "`nFusion build complete!"
}
finally {
    Pop-Location
}

exit 0