name: Build and Push Docker Image

on:
  release:
    types:
      - published  # 当通过 GitHub Releases 页面创建 release 时触发
      - deleted     # 当删除 release 时触发

jobs:
  build-and-push:
    runs-on: ubuntu-latest
    
    steps:
      - name: Checkout code
        if: github.event.action == 'published'
        uses: actions/checkout@v4
        with:
          ref: ${{ github.event.release.tag_name }}  # 使用 release 对应的 tag
      
      # 构建和推送镜像（仅在发布 release 时）
      - name: Extract version from release
        if: github.event.action == 'published'
        id: extract_version
        run: |
          # 从 release tag 中提取版本号（例如 v1.0.0 -> 1.0.0）
          TAG_NAME="${{ github.event.release.tag_name }}"
          if [ -z "$TAG_NAME" ]; then
            TAG_NAME=${GITHUB_REF#refs/tags/}
          fi
          
          # 验证版本号格式：v数字.数字.数字[-后缀]（例如 v1.0.0, v2.10.102, v1.0.0-beta）
          if [[ ! "$TAG_NAME" =~ ^v[0-9]+\.[0-9]+\.[0-9]+(-[a-zA-Z0-9.-]+)?$ ]]; then
            echo "错误: 版本号格式不正确，应为 v数字.数字.数字 或 v数字.数字.数字-后缀 (例如: v1.0.0, v1.0.0-beta)"
            exit 1
          fi
          
          VERSION=${TAG_NAME#v}  # 移除 v 前缀
          echo "VERSION=$VERSION" >> $GITHUB_OUTPUT
          echo "TAG=$TAG_NAME" >> $GITHUB_OUTPUT
          echo "Extracted version: $VERSION"
          echo "Full tag: $TAG_NAME"
      
      - name: Set up Docker Buildx
        if: github.event.action == 'published'
        uses: docker/setup-buildx-action@v3
      
      - name: Log in to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}
      
      - name: Build and push Docker image
        if: github.event.action == 'published'
        uses: docker/build-push-action@v5
        with:
          context: .
          file: ./Dockerfile
          push: true
          tags: |
            wrbug/polyhermes:${{ steps.extract_version.outputs.TAG }}
            wrbug/polyhermes:latest
          build-args: |
            VERSION=${{ steps.extract_version.outputs.VERSION }}
            GIT_TAG=${{ steps.extract_version.outputs.TAG }}
            GITHUB_REPO_URL=https://github.com/WrBug/PolyHermes
          cache-from: type=registry,ref=wrbug/polyhermes:latest
          cache-to: type=inline
      
      # 删除镜像（仅在删除 release 时）
      - name: Delete Docker image (when release is deleted)
        if: github.event.action == 'deleted'
        run: |
          TAG_NAME="${{ github.event.release.tag_name }}"
          
          # 验证版本号格式：v数字.数字.数字[-后缀]（精准匹配）
          if [[ ! "$TAG_NAME" =~ ^v[0-9]+\.[0-9]+\.[0-9]+(-[a-zA-Z0-9.-]+)?$ ]]; then
            echo "警告: 版本号格式不正确 ($TAG_NAME)，应为 v数字.数字.数字 或 v数字.数字.数字-后缀 (例如: v1.0.0, v1.0.0-beta)"
            echo "跳过删除操作"
            exit 0
          fi
          
          IMAGE_NAME="wrbug/polyhermes"
          DOCKER_USERNAME="${{ secrets.DOCKER_USERNAME }}"
          DOCKER_PASSWORD="${{ secrets.DOCKER_PASSWORD }}"
          
          echo "正在删除 Docker 镜像: ${IMAGE_NAME}:${TAG_NAME}"
          
          # 使用 Docker Hub API v2 删除镜像标签
          RESPONSE=$(curl -s -w "\n%{http_code}" -X DELETE \
            -u "${DOCKER_USERNAME}:${DOCKER_PASSWORD}" \
            "https://hub.docker.com/v2/repositories/${IMAGE_NAME}/tags/${TAG_NAME}/")
          
          HTTP_CODE=$(echo "$RESPONSE" | tail -n1)
          BODY=$(echo "$RESPONSE" | head -n-1)
          
          if [ "$HTTP_CODE" = "204" ]; then
            echo "✅ 成功删除 Docker 镜像标签: ${IMAGE_NAME}:${TAG_NAME}"
          elif [ "$HTTP_CODE" = "404" ]; then
            echo "⚠️  镜像标签不存在: ${IMAGE_NAME}:${TAG_NAME}，可能已被删除或不存在"
          else
            echo "❌ 删除失败 (HTTP $HTTP_CODE): $BODY"
            exit 1
          fi