@echo off
setlocal EnableExtensions

chcp 65001 >nul

REM Paths and settings
set "ROOT_DIR=%~dp0"
set "PROJECT_DIR=%ROOT_DIR%"
set "DIST_DIR=%PROJECT_DIR%docs\.vuepress\dist"
set "PUBLISH_DIR=%PROJECT_DIR%_publish"
set "REMOTE_URL=https://gitea.simengweb.com/si-meng-spec/build_notes_simengweb.git"
set "BRANCH=main"

REM Args
set "LIGHT_FLAG=%~1"
set "COMMIT_MSG=%~2"

echo [Info] Working dir: %PROJECT_DIR%

REM Pre-checks
where npm >nul 2>&1
if errorlevel 1 goto :npm_missing
where git >nul 2>&1
if errorlevel 1 goto :git_missing

REM Install deps on first run
if not exist "%PROJECT_DIR%node_modules" (
  echo [Info] Installing deps ^(npm ci^)...
  call npm ci
  if errorlevel 1 goto :fail
) else (
  echo [Info] node_modules exists, skip install.
)

REM Light build mode
if /I "%LIGHT_FLAG%"=="light" (
  set "LIGHT_BUILD=1"
  echo [Info] LIGHT_BUILD=1 enabled
)

set "NODE_OPTIONS=--max-old-space-size=4096"

echo [Info] Building docs...
call npm run docs:build
if errorlevel 1 goto :fail

if not exist "%DIST_DIR%" goto :no_dist

REM Prepare publish repo
if not exist "%PUBLISH_DIR%\.git" (
  echo [Info] Cloning publish repo...
  git clone "%REMOTE_URL%" "%PUBLISH_DIR%"
  if errorlevel 1 goto :fail
) else (
  echo [Info] Updating publish repo...
  pushd "%PUBLISH_DIR%"
  git fetch --all
  if errorlevel 1 goto :gitfail
  git checkout "%BRANCH%"
  if errorlevel 1 goto :gitfail
  git reset --hard "origin/%BRANCH%"
  if errorlevel 1 goto :gitfail
  popd
)

echo [Info] Cleaning publish directory ^(keep .git^)...
pushd "%PUBLISH_DIR%"
for /f "delims=" %%F in ('dir /a /b') do (
  if /I not "%%F"==".git" (
    if exist "%%F" (
      attrib -R "%%F" >nul 2>&1
      rd /s /q "%%F" 2>nul
      del /f /q "%%F" 2>nul
    )
  )
)
popd

echo [Info] Copying dist to publish...
robocopy "%DIST_DIR%" "%PUBLISH_DIR%" *.* /E /NFL /NDL /NP /NJH /NJS >nul
if errorlevel 8 goto :fail

pushd "%PUBLISH_DIR%"
if defined GIT_USERNAME git config user.name "%GIT_USERNAME%"
if defined GIT_EMAIL git config user.email "%GIT_EMAIL%"

git add -A

if "%COMMIT_MSG%"=="" set "COMMIT_MSG=Build: %DATE% %TIME%"

set "HAS_CHANGES=1"
git diff --cached --quiet
if not errorlevel 1 set "HAS_CHANGES=0"

if "%HAS_CHANGES%"=="0" (
  echo [Info] No changes to commit; skipping push.
) else (
  git commit -m "%COMMIT_MSG%"
  if errorlevel 1 (
    popd
    goto :fail
  )
  git push origin "%BRANCH%"
  if errorlevel 1 (
    popd
    goto :fail
  )
  echo [Info] Pushed to %REMOTE_URL% ^(branch %BRANCH%^).
)
popd

echo [Success] Build and publish done.
exit /b 0

:npm_missing
echo [ERROR] npm not found. Please install Node.js.
goto :fail

:git_missing
echo [ERROR] git not found. Please install Git.
goto :fail

:no_dist
echo [ERROR] Dist directory not found: %DIST_DIR%
goto :fail

:gitfail
echo [ERROR] Git operation failed.
popd
goto :fail

:fail
exit /b 1