name: Build Sphinx Documentation

on:
  pull_request:
    types: [opened, synchronize, reopened, edited]
    branches: [master]

jobs:
  build-docs:
    name: Build Documentation from PR Branch
    runs-on: linux

    steps:
      # 第一步：检出PR分支代码
      - name: Checkout PR branch
        uses: actions/checkout@v4
        with:
          ref: ${{ github.head_ref }}  # 检出PR分支而不是主分支
          fetch-depth: 0

      # 第二步：设置Python虚拟环境
      - name: Set up Python virtual environment
        run: |
          echo "Setting up Python environment for PR branch"
          python -m venv /home/ly0kos/work/test_env/.venv-pr-${{ github.head_ref }}
          source /home/ly0kos/work/test_env/.venv-pr-${{ github.head_ref }}/bin/activate
          pip install --upgrade pip
          if [ -f requirements.txt ]; then
            pip install -r requirements.txt
          else
            echo "No requirements.txt found, installing sphinx"
            pip install sphinx
          fi

      # 第三步：构建文档（从PR分支）
      - name: Build documentation from PR branch
        run: |
          echo "=== Building documentation from PR branch: ${{ github.head_ref }} ==="
          source /home/ly0kos/work/test_env/.venv-pr-${{ github.head_ref }}/bin/activate
          
          # 在PR分支目录中构建
          sphinx-build -b html ./docs ./build -v -j 4
          
          # 将构建结果移动到共享位置，便于查看
          rm -rf /home/ly0kos/work/test_env/pr-builds/${{ github.head_ref }}
          mkdir -p /home/ly0kos/work/test_env/pr-builds/${{ github.head_ref }}
          cp -r ./build/* /home/ly0kos/work/test_env/pr-builds/${{ github.head_ref }}/
          
          echo "✓ Build completed for PR branch: ${{ github.head_ref }}"

      # 第四步：验证构建结果
      - name: Verify build
        run: |
          echo "Build output for PR ${{ github.head_ref }}:"
          ls -la /home/ly0kos/work/test_env/pr-builds/${{ github.head_ref }}/ | head -10