@echo off
setlocal enabledelayedexpansion

REM Build script for the Parts Lookup app.
REM Run from this folder in a Command Prompt (cmd.exe) or PowerShell.

echo === Detecting Python ===

REM Activate virtual environment if present
if exist .venv\Scripts\activate.bat (
    echo Activating .venv virtual environment...
    call .venv\Scripts\activate.bat
) else if exist venv\Scripts\activate.bat (
    echo Activating venv virtual environment...
    call venv\Scripts\activate.bat
)

REM Determine the python command to use (prefer python, fallback to py)
set PYTHON_CMD=python
where %PYTHON_CMD% >nul 2>nul
if errorlevel 1 (
    set PYTHON_CMD=py
    where !PYTHON_CMD! >nul 2>nul
    if errorlevel 1 (
        echo Python could not be found! Please ensure Python is installed and added to your system PATH.
        pause
        exit /b 1
    )
)

echo Using Python command: !PYTHON_CMD!

echo === Installing/updating dependencies ===
!PYTHON_CMD! -m pip install --upgrade pip
!PYTHON_CMD! -m pip install -r requirements.txt
if errorlevel 1 (
    echo Failed to install dependencies.
    pause
    exit /b 1
)

echo === Preparing assets ===
if exist icon_small.png (
    echo Generating high-quality icon.ico from icon_small.png...
    !PYTHON_CMD! -c "from PIL import Image; import os; img = Image.open('icon_small.png'); img.save(os.path.join('app', 'assets', 'icon.ico'), format='ICO', sizes=[(256, 256), (128, 128), (64, 64), (48, 48), (32, 32), (16, 16)])" >nul 2>nul
)

echo === Cleaning previous build ===
REM Force-terminate any running instances of the app to release file locks
echo Closing any running instances of CSGPackerShipperHelper.exe...
taskkill /f /im CSGPackerShipperHelper.exe >nul 2>nul

REM Clean stale Python bytecode caches. Stale .pyc files from earlier edits
REM can cause PyInstaller to mark a source module as "invalid" and silently
REM omit it from the bundle, leading to ModuleNotFoundError at runtime.
echo Clearing __pycache__ directories...
if exist __pycache__ rmdir /S /Q __pycache__ >nul 2>nul
if exist app\__pycache__ rmdir /S /Q app\__pycache__ >nul 2>nul

REM Clean build folder
if exist build (
    rmdir /S /Q build >nul 2>nul
    if exist build (
        echo [WARNING] Could not clean the 'build' directory. Some files might be locked.
    )
)

REM Clean dist folder with robust lock detection and retry prompt
if exist dist (
    rmdir /S /Q dist >nul 2>nul
    if exist dist (
        echo.
        echo ============================================================
        echo [LOCK ERROR] The 'dist' output folder is locked by Windows!
        echo ============================================================
        echo This usually happens if:
        echo   1. The 'CSGPackerShipperHelper.exe' app is still running in the background.
        echo   2. You have the 'dist' folder open in Windows File Explorer.
        echo.
        echo Please close the application and any open File Explorer windows,
        echo then press any key to retry cleaning and building...
        echo ============================================================
        pause
        
        REM Retry terminating app and deleting dist
        taskkill /f /im CSGPackerShipperHelper.exe >nul 2>nul
        rmdir /S /Q dist >nul 2>nul
        
        if exist dist (
            echo.
            echo [ERROR] Folder is still locked. Please manually delete:
            echo   dist\
            echo then run this script again.
            pause
            exit /b 1
        )
    )
)

echo === Building executable ===
!PYTHON_CMD! -m PyInstaller --clean --noconfirm PartsLookup.spec
if errorlevel 1 (
    echo Build failed.
    pause
    exit /b 1
)

echo.
echo === Done ===
echo Output: dist\CSGPackerShipperHelper\CSGPackerShipperHelper.exe
echo Copy the entire dist\CSGPackerShipperHelper folder to the target workstation,
echo or to a shared drive that workstations can launch from.
pause
endlocal