@echo off
setlocal EnableExtensions EnableDelayedExpansion

rem ============================================
rem  PPTX Image Compressor - Installer/Runner
rem  - No admin rights required
rem  - Uses local CaesiumCLT and Python Embeddable
rem  - Pass-through of all CLI args to the .py
rem ============================================

set "APP_NAME=PPTX Image Compressor"
set "SELF_DIR=%~dp0"
set "SCRIPT=%SELF_DIR%pptx_image_compress.py"

rem ---- Python Embeddable config (adjust if needed) ----
set "PY_EMBED_VERSION=3.11.9"
set "PY_EMBED_ZIP=python-%PY_EMBED_VERSION%-embed-amd64.zip"
set "PY_EMBED_URL=https://www.python.org/ftp/python/%PY_EMBED_VERSION%/%PY_EMBED_ZIP%"
set "PY_DIR=%SELF_DIR%python-embed"
set "PY_EXE=%PY_DIR%\python.exe"

rem ---- CaesiumCLT discovery ----
set "CAE_EXE=caesiumclt.exe"

if exist "%SELF_DIR%%CAE_EXE%" (
    rem Prefer local caesiumclt.exe near the BAT
    set "PATH=%SELF_DIR%;%PATH%"
) else (
    where /q %CAE_EXE%
    if errorlevel 1 (
        echo [ERROR] ^> 'caesiumclt.exe' nicht gefunden.
        echo         Lege 'caesiumclt.exe' neben diese BAT (empfohlen)
        echo         oder sorge dafuer, dass es im PATH liegt.
        exit /b 2
    )
)

rem ---- Python discovery / installation ----
set "PY_CMD="

rem 1) existing python in PATH?
where /q python
if %errorlevel%==0 (
    for /f "delims=" %%P in ('where python 2^>nul') do (
        set "PY_CMD=%%P"
        goto :have_python
    )
)

rem 2) local embeddable python present?
if exist "%PY_EXE%" (
    set "PY_CMD=%PY_EXE%"
    goto :have_python
)

rem 3) download embeddable python locally
echo [INFO] Kein Python gefunden. Lade Embeddable Python %PY_EMBED_VERSION% ...
powershell -NoLogo -NoProfile -Command ^
 "try { Invoke-WebRequest -Uri '%PY_EMBED_URL%' -OutFile '%SELF_DIR%%PY_EMBED_ZIP%' -UseBasicParsing; exit 0 } catch { Write-Error $_; exit 1 }"
if errorlevel 1 (
    echo [WARN] Automatischer Download fehlgeschlagen.
    echo        Bitte lade die Datei manuell herunter:
    echo        %PY_EMBED_URL%
    echo        und speichere sie als:
    echo        %SELF_DIR%%PY_EMBED_ZIP%
    pause
)

if not exist "%SELF_DIR%%PY_EMBED_ZIP%" (
    echo [ERROR] Embeddable-Python ZIP nicht vorhanden. Abbruch.
    exit /b 3
)

echo [INFO] Entpacke Embeddable Python nach "%PY_DIR%" ...
if exist "%PY_DIR%" rmdir /s /q "%PY_DIR%"
mkdir "%PY_DIR%" >nul 2>&1
powershell -NoLogo -NoProfile -Command ^
 "Expand-Archive -Path '%SELF_DIR%%PY_EMBED_ZIP%' -DestinationPath '%PY_DIR%' -Force"
if errorlevel 1 (
    echo [ERROR] Konnte ZIP nicht entpacken. Abbruch.
    exit /b 4
)

set "PY_CMD=%PY_EXE%"

:have_python
if not defined PY_CMD (
    echo [ERROR] Konnte Python nicht ermitteln. Abbruch.
    exit /b 5
)

rem ---- Optional: 'import site' im Embeddable aktivieren ----
if exist "%PY_DIR%" (
    for /f "delims=" %%F in ('dir /b "%PY_DIR%\python3*.pth" 2^>nul') do (
        set "PTH_FILE=%PY_DIR%\%%F"
    )
    if defined PTH_FILE (
        powershell -NoLogo -NoProfile -Command ^
          "(Get-Content -Raw '%PTH_FILE%') -replace '^\s*#\s*import site','import site' | Set-Content -Encoding ASCII '%PTH_FILE%'"
    )
)

rem ---- Verify script presence ----
if not exist "%SCRIPT%" (
    echo [ERROR] Script nicht gefunden: "%SCRIPT%"
    echo         Lege 'pptx_image_compress.py' neben diese BAT.
    exit /b 6
)

echo.
echo [%APP_NAME%] Starte ...
echo Command: "%PY_CMD%" "%SCRIPT%" %*
echo.
"%PY_CMD%" "%SCRIPT%" %*
set "RC=%ERRORLEVEL%"

echo.
if "%RC%"=="0" (
    echo [OK] Fertig.
) else (
    echo [ERROR] Prozess endete mit Code %RC%.
)

endlocal & exit /b %RC%