param(
  [Parameter(Mandatory = $false)]
  [string]$CaddyExe = "caddy",

  [Parameter(Mandatory = $false)]
  [string]$CaddyfilePath = ".\deploy\Caddyfile",

  [Parameter(Mandatory = $false)]
  [string]$ProxyBaseUrl = "http://localhost:8080",

  [Parameter(Mandatory = $false)]
  [int]$WarmupSeconds = 2
)

$ErrorActionPreference = "Stop"

function Stop-CaddyIfRunning($proc) {
  if ($null -ne $proc -and -not $proc.HasExited) {
    try {
      Stop-Process -Id $proc.Id -Force
    } catch {}
  }
}

Write-Host "Step 15 Local Proxy Test"
Write-Host "Caddy: $CaddyExe"
Write-Host "Caddyfile: $CaddyfilePath"
Write-Host "ProxyBaseUrl: $ProxyBaseUrl"

if (-not (Test-Path $CaddyfilePath)) {
  throw "Caddyfile not found at: $CaddyfilePath"
}
if (-not (Test-Path ".\deploy\healthcheck.ps1")) {
  throw "healthcheck.ps1 not found at: .\deploy\healthcheck.ps1"
}

# Ensure local upstream default matches typical backend port
if (-not $env:BACKEND_UPSTREAM_LOCAL -or $env:BACKEND_UPSTREAM_LOCAL.Trim().Length -eq 0) {
  $env:BACKEND_UPSTREAM_LOCAL = "localhost:8000"
}

$caddyProc = $null
try {
  Write-Host "Starting Caddy..."
  $caddyProc = Start-Process -FilePath $CaddyExe -ArgumentList @(
    "run",
    "--config", $CaddyfilePath,
    "--adapter", "caddyfile"
  ) -PassThru -WindowStyle Hidden

  Start-Sleep -Seconds $WarmupSeconds

  Write-Host "Running healthcheck via proxy..."
  & .\deploy\healthcheck.ps1 -BaseUrl $ProxyBaseUrl
  if ($LASTEXITCODE -ne 0) {
    throw "healthcheck.ps1 failed with exit code $LASTEXITCODE"
  }

  Write-Host "OK Step 15 local proxy test passed."
} catch {
  Write-Host "FAIL Step 15 local proxy test: $($_.Exception.Message)"
  throw
} finally {
  Write-Host "Stopping Caddy..."
  Stop-CaddyIfRunning $caddyProc
}