@echo off
setlocal EnableExtensions DisableDelayedExpansion

for %%I in ("%~dp0..") do set "REPO_ROOT=%%~fI"
set "FRONTEND_DIR=%REPO_ROOT%\frontend"
title SystemSimulationApp ReactFlow - 127.0.0.1:5173

if not exist "%FRONTEND_DIR%\package.json" (
  echo [ERROR] Frontend package.json was not found:
  echo         %FRONTEND_DIR%\package.json
  echo.
  pause
  exit /b 1
)

set "NODE_DIR="
for /d %%D in ("%REPO_ROOT%\.tools\node-*-win-x64") do (
  if not defined NODE_DIR if exist "%%~fD\node.exe" if exist "%%~fD\npm.cmd" (
    "%%~fD\node.exe" -e "v=process.versions.node.split('.');M=+v[0];m=+v[1];process.exit((M===20&&m>=19)||(M===22&&m>=12)||M>=23?0:1)" >nul 2>&1
    if not errorlevel 1 set "NODE_DIR=%%~fD"
  )
)

if not defined NODE_DIR (
  echo [ERROR] A compatible Node.js portable runtime was not found under:
  echo         %REPO_ROOT%\.tools
  echo Vite requires Node.js 20.19+ or 22.12+.
  echo.
  pause
  exit /b 1
)

set "NPM_EXE=%NODE_DIR%\npm.cmd"
if not exist "%NPM_EXE%" (
  echo [ERROR] npm.cmd was not found:
  echo         %NPM_EXE%
  echo.
  pause
  exit /b 1
)

if not exist "%FRONTEND_DIR%\node_modules\.bin\vite.cmd" (
  echo [ERROR] Frontend dependencies are not installed.
  echo Run the following command first:
  echo         cd /d "%FRONTEND_DIR%"
  echo         call "%NPM_EXE%" ci
  echo.
  pause
  exit /b 1
)

pushd "%FRONTEND_DIR%" >nul
if errorlevel 1 (
  echo [ERROR] Unable to enter the frontend directory:
  echo         %FRONTEND_DIR%
  echo.
  pause
  exit /b 1
)

set "PATH=%NODE_DIR%;%PATH%"

echo Starting ReactFlow at http://127.0.0.1:5173
echo Press Ctrl+C to stop the service.
echo.

call "%NPM_EXE%" run dev -- --strictPort
set "EXIT_CODE=%ERRORLEVEL%"

if not "%EXIT_CODE%"=="0" (
  echo.
  echo [ERROR] ReactFlow exited with code %EXIT_CODE%.
  pause
)

popd
exit /b %EXIT_CODE%