param(
  [int] $Port = 8797,
  [string] $StateDir = "E:\Projects\Odin\scratch\odin",
  [switch] $Foreground
)

$ErrorActionPreference = "Stop"

$repoRoot = Split-Path -Parent $PSScriptRoot
$scriptPath = Join-Path $repoRoot "src\odin-coordinator.cjs"
$pidPath = Join-Path $StateDir "odin.pid"
$outLog = Join-Path $StateDir "odin.out.log"
$errLog = Join-Path $StateDir "odin.err.log"

New-Item -ItemType Directory -Force -Path $StateDir | Out-Null

if (Test-Path $pidPath) {
  $oldPid = (Get-Content -Raw $pidPath).Trim()
  if ($oldPid -match "^\d+$") {
    $old = Get-Process -Id ([int] $oldPid) -ErrorAction SilentlyContinue
    if ($old) {
      throw "Odin already appears to be running as PID $oldPid."
    }
  }
  Remove-Item -LiteralPath $pidPath -Force
}

$env:NODE_PATH = "E:\Projects\CultLib\packages"
$args = @(
  $scriptPath,
  "--port", "$Port",
  "--stateDir", $StateDir
)

if ($Foreground) {
  & node @args
  exit $LASTEXITCODE
}

$proc = Start-Process -FilePath "node" -ArgumentList $args -WorkingDirectory $repoRoot -WindowStyle Hidden -PassThru -RedirectStandardOutput $outLog -RedirectStandardError $errLog
$proc.Id | Set-Content -Encoding ASCII -LiteralPath $pidPath
Start-Sleep -Seconds 1
if ($proc.HasExited) {
  $detail = ""
  if (Test-Path $outLog) { $detail += Get-Content -Raw $outLog }
  if (Test-Path $errLog) { $detail += Get-Content -Raw $errLog }
  throw "Odin exited immediately with code $($proc.ExitCode).`n$detail"
}

Write-Host "Odin started as PID $($proc.Id)."
Write-Host "Health: http://127.0.0.1:$Port/health"
Write-Host "Eve deck: ws://127.0.0.1:$Port/eve/deck"