name: Submodule Sync

on:
  schedule:
    - cron: '0 0 * * *' # 每天凌晨运行
  workflow_dispatch: # 支持手动触发

jobs:
  sync:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          fetch-depth: 0

      - name: Update submodules
        run: |
          git submodule init
          # 获取所有子模块路径
          sm_paths=$(git config --file .gitmodules --get-regexp path | awk '{print $2}')
          
          echo "### Submodule Sync Report" >> $GITHUB_STEP_SUMMARY
          echo "| Submodule | Status | Action |" >> $GITHUB_STEP_SUMMARY
          echo "|-----------|--------|--------|" >> $GITHUB_STEP_SUMMARY

          for sm in $sm_paths; do
            echo "--------------------------------------------------"
            echo "Checking submodule: $sm"
            URL=$(git config --file .gitmodules --get "submodule.$sm.url")
            
            # 检查远程仓库是否存活
            if curl --output /dev/null --silent --head --fail -L "$URL"; then
              echo "Upstream $URL is healthy. Updating to latest commit..."
              if git submodule update --init --recursive --remote "$sm"; then
                echo "Successfully updated $sm"
                echo "| $sm | ✅ OK | Updated to latest |" >> $GITHUB_STEP_SUMMARY
              else
                echo "::warning:: Failed to update $sm (check branch/ref). Skipping."
                echo "| $sm | ⚠️ WARN | Update failed |" >> $GITHUB_STEP_SUMMARY
              fi
            else
              echo "::error:: Submodule $sm upstream ($URL) is 404 or unreachable!"
              echo "Skipping $sm to avoid build failure. Manual intervention required (fork or flatten)."
              echo "| $sm | ❌ 404 | **Action required** |" >> $GITHUB_STEP_SUMMARY
            fi
          done
          
      - name: Commit and push if changed
        run: |
          git config --global user.name "github-actions[bot]"
          git config --global user.email "github-actions[bot]@users.noreply.github.com"
          git add .
          if git diff --staged --quiet; then
            echo "No changes to commit"
          else
            git commit -m "chore: sync submodules [skip ci]"
            git push
          fi