name: Sync from Fork

on:
  # 每天 UTC 00:00 执行
  schedule:
    - cron: "0 0 * * *"

  # GitHub 页面手动执行
  workflow_dispatch:

permissions:
  contents: write

concurrency:
  group: sync-from-fork
  cancel-in-progress: false

jobs:
  sync:
    name: Sync Fork main to Original main
    runs-on: ubuntu-latest

    steps:
      # ==========================================
      # 1. Checkout 原仓库
      # ==========================================
      - name: Checkout original repository
        uses: actions/checkout@v4
        with:
          ref: main
          fetch-depth: 0

      # ==========================================
      # 2. Clone Fork
      # ==========================================
      - name: Clone fork repository
        run: |
          git clone \
            --depth 1 \
            --branch main \
            "https://github.com/SnapHutaoRemasteringProject/Snap.Metadata.Work.git" \
            ../fork

      # ==========================================
      # 3. 显示同步前后的 Commit
      # ==========================================
      - name: Show source commit
        working-directory: ../fork
        run: |
          echo "Fork commit:"
          git log -1 --oneline

      - name: Show original commit
        run: |
          echo "Original commit:"
          git log -1 --oneline

      # ==========================================
      # 4. 同步文件
      #
      # --delete：
      #   Fork 删除的文件，原仓库也删除
      #
      # 排除 .git：
      #   不复制 Git 元数据
      #
      # 排除 .github/workflows：
      #   原仓库自己的 Workflow 永远保留
      # ==========================================
      - name: Sync files
        run: |
          rsync -av --delete \
            --exclude='.git/' \
            --exclude='.github/workflows/' \
            ../fork/ ./

      # ==========================================
      # 5. 查看变化
      # ==========================================
      - name: Show changes
        run: |
          git status --short
          git diff --stat

      # ==========================================
      # 6. 如果有变化则提交
      # ==========================================
      - name: Commit changes
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"

          if git diff --quiet; then
            echo "No changes detected."
            exit 0
          fi

          git add -A

          git commit \
            -m "chore: sync from fork"

      # ==========================================
      # 7. Push 到原仓库 main
      # ==========================================
      - name: Push changes
        run: |
          git push origin HEAD:main