@echo off
setlocal EnableExtensions
set "PREP_ROOT=%~1"
if "%PREP_ROOT%"=="" (
  echo   [Prep] ERROR: launch-prep.bat requires repo root path.
  exit /b 1
)

echo.
echo   Pulling latest from origin/main...
if exist "%PREP_ROOT%\.git" (
  pushd "%PREP_ROOT%" >nul
  git pull origin main
  if errorlevel 1 (
    echo   [Prep] Note: git pull skipped or failed ^(offline, no remote, or local changes^).
  ) else (
    echo   [Prep] Git pull finished.
  )
  popd >nul
) else (
  echo   [Prep] Skipped ^(not a git checkout^).
)

if not exist "%PREP_ROOT%\server\web\package.json" (
  echo   [Prep] No server\web\package.json - skipping UI build.
  exit /b 0
)

set "PATH=C:\Program Files\nodejs;%PATH%"
where npm >nul 2>nul
if errorlevel 1 (
  echo   [Prep] WARNING: npm not found - skipping UI build.
  exit /b 0
)

echo.
echo   Building UI ^(server\web^)...
cd /d "%PREP_ROOT%\server\web"
if not exist "node_modules" (
  if exist "package-lock.json" (
    echo   [Prep] npm ci...
    call npm ci
  ) else (
    echo   [Prep] npm install...
    call npm install
  )
  if errorlevel 1 (
    cd /d "%PREP_ROOT%"
    echo   [Prep] ERROR: npm install failed.
    exit /b 1
  )
)

echo   [Prep] npm run build ^(this may take a few minutes^)...
call npm run build
if errorlevel 1 (
  cd /d "%PREP_ROOT%"
  echo   [Prep] ERROR: Frontend build failed.
  exit /b 1
)
cd /d "%PREP_ROOT%"

if not exist "%PREP_ROOT%\server\webroot" mkdir "%PREP_ROOT%\server\webroot"
echo   [Prep] Syncing server\webroot...
xcopy /E /I /Y /Q "server\web\dist\*" "server\webroot\" >nul

if exist "%PREP_ROOT%\usb" (
  if not exist "%PREP_ROOT%\usb\webroot" mkdir "%PREP_ROOT%\usb\webroot"
  echo   [Prep] Syncing usb\webroot...
  xcopy /E /I /Y /Q "server\web\dist\*" "usb\webroot\" >nul
)

echo   [Prep] UI build complete.
exit /b 0