@echo off
setlocal EnableExtensions

set "ROOT_DIR=%~dp0"
set "BACKEND_HOST=%BACKEND_HOST%"
set "BACKEND_PORT=%BACKEND_PORT%"
set "FRONTEND_HOST=%FRONTEND_HOST%"
set "FRONTEND_PORT=%FRONTEND_PORT%"

if not defined BACKEND_HOST set "BACKEND_HOST=127.0.0.1"
if not defined BACKEND_PORT set "BACKEND_PORT=8000"
if not defined FRONTEND_HOST set "FRONTEND_HOST=127.0.0.1"
if not defined FRONTEND_PORT set "FRONTEND_PORT=5173"
if not defined PYTHON_BIN set "PYTHON_BIN=python"

call "%PYTHON_BIN%" --version >nul 2>&1
if errorlevel 1 (
    if /i "%PYTHON_BIN%"=="python" (
        call py --version >nul 2>&1
        if not errorlevel 1 set "PYTHON_BIN=py"
    )
)
set "BACKEND_VENV=%ROOT_DIR%backend\.venv"
set "BACKEND_PYTHON=%BACKEND_VENV%\Scripts\python.exe"

if not exist "%ROOT_DIR%backend\app\main.py" (
    echo Backend entrypoint not found: backend\app\main.py
    exit /b 1
)

if not exist "%ROOT_DIR%frontend\package.json" (
    echo Frontend package manifest not found: frontend\package.json
    exit /b 1
)

if not exist "%ROOT_DIR%backend\requirements.txt" (
    echo Backend requirements not found: backend\requirements.txt
    exit /b 1
)

call "%PYTHON_BIN%" --version >nul 2>&1
if errorlevel 1 (
    echo Python executable not found: %PYTHON_BIN%
    echo Set PYTHON_BIN to the Python executable path and run this script again.
    exit /b 1
)

where npm >nul 2>&1
if errorlevel 1 (
    echo npm is required to start the frontend.
    exit /b 1
)

if not exist "%BACKEND_PYTHON%" (
    echo Creating backend virtual environment...
    call "%PYTHON_BIN%" -m venv "%BACKEND_VENV%"
    if errorlevel 1 exit /b 1
)

call "%BACKEND_PYTHON%" -c "import build123d, dotenv, fastapi, httpx, jsonschema, multipart, uvicorn" >nul 2>&1
if errorlevel 1 (
    echo Installing backend dependencies...
    call "%BACKEND_PYTHON%" -m pip install -r "%ROOT_DIR%backend\requirements.txt"
    if errorlevel 1 exit /b 1
)

if not exist "%ROOT_DIR%frontend\node_modules\next" (
    echo Installing frontend dependencies...
    pushd "%ROOT_DIR%frontend"
    if exist package-lock.json (
        call npm ci
    ) else (
        call npm install
    )
    if errorlevel 1 (
        popd
        exit /b 1
    )
    popd
)

echo Starting backend on %BACKEND_HOST%:%BACKEND_PORT%
start "CAD CDSL Backend" /D "%ROOT_DIR%backend" cmd /k call "%BACKEND_PYTHON%" -m uvicorn app.main:app --host %BACKEND_HOST% --port %BACKEND_PORT% --reload

echo Starting frontend on %FRONTEND_HOST%:%FRONTEND_PORT%
start "CAD CDSL Frontend" /D "%ROOT_DIR%frontend" cmd /k call npm run dev -- -H %FRONTEND_HOST% -p %FRONTEND_PORT%

echo.
echo Frontend: http://%FRONTEND_HOST%:%FRONTEND_PORT%
echo Backend:  http://%BACKEND_HOST%:%BACKEND_PORT%
echo The backend and frontend are running in separate command windows.
echo Close those windows to stop the services.

endlocal