@echo off
setlocal DisableDelayedExpansion
cd /d "%~dp0"

set "PYTHON_ARGS="
if defined VIRTUAL_ENV (
    set "PYTHON_EXE=%VIRTUAL_ENV%\Scripts\python.exe"
    call :probe_python
    if not errorlevel 1 goto python_ready
)

set "PYTHON_EXE=%~dp0.venv\Scripts\python.exe"
call :probe_python
if not errorlevel 1 goto python_ready

set "PYTHON_EXE=py.exe"
set "PYTHON_ARGS=-3"
call :probe_python
if not errorlevel 1 goto python_ready

set "PYTHON_EXE=python.exe"
set "PYTHON_ARGS="
call :probe_python
if not errorlevel 1 goto python_ready

echo [ERROR] No working Python 3 interpreter found. Install Python or recreate .venv.
if /i "%~1"=="--check-python" exit /b 1
pause
exit /b 1

:python_ready
if /i "%~1"=="--check-python" (
    "%PYTHON_EXE%" %PYTHON_ARGS% -c "import sys; print(sys.executable)"
    exit /b
)

chcp 936 >nul
title Baiyue Logistics AI Customer Service
echo ============================================
echo   Baiyue Logistics AI Customer Service
echo ============================================
echo.

echo [1/3] Checking port 5000 ...
netstat -ano | findstr "LISTENING" | findstr /C:":5000 " >nul
if not errorlevel 1 (
    echo.
    echo [INFO] Port 5000 is already in use, a server is probably running:
    echo.
    netstat -ano | findstr "LISTENING" | findstr /C:":5000 "
    echo.
    echo The last column is the process id. To stop it:
    echo     taskkill /PID 12345 /F
    echo.
    start "" http://127.0.0.1:5000
    echo Browser opened. Press any key to close this window.
    pause
    exit /b 0
)
echo       OK - port is free.

echo [2/3] Checking dependencies ...
"%PYTHON_EXE%" %PYTHON_ARGS% -c "import flask, requests, waitress, dotenv, openpyxl" >nul 2>nul
if errorlevel 1 (
    echo       Missing packages, installing ...
    "%PYTHON_EXE%" %PYTHON_ARGS% -m pip install -r requirements.txt
    if errorlevel 1 (
        echo [ERROR] pip install failed, check network and retry.
        pause
        exit /b 1
    )
)
echo       OK - dependencies ready.

echo [3/3] Checking DeepSeek configuration ...
"%PYTHON_EXE%" %PYTHON_ARGS% -c "import sys; from logistics_chat.config import default_config; sys.exit(0 if default_config()['DEEPSEEK_API_KEY'] else 1)" >nul
if errorlevel 1 (
    echo [WARN] No DeepSeek API key configured.
    echo Copy .env.example to .env and set DEEPSEEK_API_KEY, then restart.
) else (
    echo       OK - key detected in .env or environment.
)

echo.
echo ============================================
echo   Starting: http://127.0.0.1:5000
echo   Close this window or press Ctrl+C to stop
echo ============================================
echo.

start "" http://127.0.0.1:5000
"%PYTHON_EXE%" %PYTHON_ARGS% am.py
set "APP_EXIT_CODE=%ERRORLEVEL%"

echo.
echo Server stopped.
pause
exit /b %APP_EXIT_CODE%

:probe_python
"%PYTHON_EXE%" %PYTHON_ARGS% -c "import sys; sys.exit(0 if sys.version_info.major == 3 else 1)" >nul 2>nul
if "%ERRORLEVEL%"=="0" exit /b 0
exit /b 1