@echo off
setlocal

set "APP_DIR=%~dp0"
set "PORT=3000"
set "APP_URL=http://127.0.0.1:3000/"

powershell -NoProfile -ExecutionPolicy Bypass -Command ^
  "$ErrorActionPreference = 'Stop';" ^
  "$appDir = $env:APP_DIR;" ^
  "$port = [int]$env:PORT;" ^
  "$url = $env:APP_URL;" ^
  "$listener = Get-NetTCPConnection -LocalPort $port -State Listen -ErrorAction SilentlyContinue;" ^
  "if (-not $listener) {" ^
  "  Start-Process -FilePath 'node' -ArgumentList 'server.mjs' -WorkingDirectory $appDir -WindowStyle Hidden;" ^
  "  Start-Sleep -Milliseconds 900;" ^
  "}" ^
  "Start-Process $url;"

if errorlevel 1 (
  echo Fehler: Server konnte nicht gestartet oder Browser nicht geoeffnet werden.
  echo Pruefe, ob Node.js installiert ist und Port %PORT% frei ist.
  pause
  exit /b 1
)

endlocal