name: 部署后端服务

on:
  push:
    branches: [ main ]
    paths:
      - 'backend/**'
      - '.env.example'
      - '.gitea/workflows/deploy-backend.yml'
  workflow_dispatch:

env:
  REGISTRY: registry.cn-hangzhou.aliyuncs.com
  IMAGE_NAME: photography/backend

jobs:
  build-and-deploy:
    name: 🚀 构建并部署
    runs-on: ubuntu-latest
    if: github.ref == 'refs/heads/main'

    steps:
      - name: 📥 检出代码
        uses: actions/checkout@v4

      - name: 🐳 设置 Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: 🔑 登录到镜像仓库
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}

      - name: 📝 提取元数据
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=ref,event=branch
            type=ref,event=pr
            type=sha,prefix={{branch}}-
            type=raw,value=latest,enable={{is_default_branch}}

      - name: 🏗️ 构建并推送镜像
        uses: docker/build-push-action@v5
        with:
          context: ./backend
          file: ./backend/Dockerfile
          platforms: linux/amd64
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max

      - name: 📦 同步配置文件
        run: |
          # 安装sshpass用于密码认证
          sudo apt-get update && sudo apt-get install -y sshpass
          
          # 同步配置文件到服务器
          echo "📋 同步配置文件到服务器..."
          export SSHPASS=${{ secrets.TYY_PWD }}
          sshpass -e scp -o StrictHostKeyChecking=no -P ${{ secrets.PORT }} backend/docker-compose.prod.yml ${{ secrets.TYY_USER }}@${{ secrets.HOST }}:/data/docker/photography/backend/docker-compose.yml
          
          # 创建生产环境配置文件
          echo "📋 创建生产环境配置..."
          sed -e "s/DB_USER=.*/DB_USER=${{ secrets.POSTGRES_PHOTO_USER }}/" \
              -e "s/DB_PASSWORD=.*/DB_PASSWORD=${{ secrets.POSTGRES_PHOTO_PWD }}/" \
              -e "s/DB_HOST=.*/DB_HOST=localhost/" \
              -e "s/APP_ENV=.*/APP_ENV=production/" \
              backend/.env.example > /tmp/production.env
          
          sshpass -e scp -o StrictHostKeyChecking=no -P ${{ secrets.PORT }} /tmp/production.env ${{ secrets.TYY_USER }}@${{ secrets.HOST }}:/data/docker/photography/backend/.env
          echo "✅ 配置文件同步完成"

      - name: 🚀 部署到生产环境
        uses: appleboy/ssh-action@v1.0.0
        with:
          host: ${{ secrets.HOST }}
          username: ${{ secrets.TYY_USER }}
          password: ${{ secrets.TYY_PWD }}
          port: ${{ secrets.PORT }}
          script: |
            # 切换到后端项目目录
            cd /data/docker/photography/backend
            
            # 备份当前运行的容器 (如果存在)
            if docker ps -q -f name=photography-api; then
              echo "📦 备份当前后端容器..."
              docker commit photography-api photography_backend_backup_$(date +%Y%m%d_%H%M%S)
            fi
            
            # 停止现有服务
            echo "🛑 停止现有服务..."
            docker-compose down api || true
            
            # 拉取最新镜像
            echo "📥 拉取最新镜像..."
            docker-compose pull api
            
            # 数据库迁移需要手动执行
            echo "⚠️  数据库迁移需要手动执行，请在部署后运行："
            echo "   docker-compose exec api ./main migrate"
            
            # 启动后端服务
            echo "🚀 启动后端服务..."
            docker-compose up -d api
            
            # 等待服务启动
            echo "⏳ 等待服务启动..."
            sleep 30
            
            # 健康检查
            echo "🔍 执行健康检查..."
            for i in {1..30}; do
              if curl -f http://localhost:8080/health > /dev/null 2>&1; then
                echo "✅ 后端服务健康检查通过"
                break
              fi
              echo "等待后端服务启动... ($i/30)"
              sleep 10
            done
            
            # 检查服务状态
            echo "📊 检查服务状态..."
            docker-compose ps
            
            # 清理旧镜像 (保留最近3个)
            echo "🧹 清理旧镜像..."
            docker images ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }} --format "table {{.Repository}}:{{.Tag}}\t{{.CreatedAt}}" | tail -n +2 | sort -k2 -r | tail -n +4 | awk '{print $1}' | xargs -r docker rmi || true
            
            # 清理旧备份容器 (保留最近5个)
            docker images photography_backend_backup_* --format "table {{.Repository}}:{{.Tag}}\t{{.CreatedAt}}" | tail -n +2 | sort -k2 -r | tail -n +6 | awk '{print $1}' | xargs -r docker rmi || true
            
            echo "🎉 后端部署完成!"
            echo "📋 请记住手动运行数据库迁移："
            echo "   docker-compose exec api ./main migrate"

      - name: 📧 发送部署通知
        if: always()
        uses: appleboy/telegram-action@master
        with:
          to: ${{ secrets.TELEGRAM_TO }}
          token: ${{ secrets.TELEGRAM_TOKEN }}
          message: |
            🔧 摄影作品集后端部署
            
            📦 项目: ${{ github.repository }}
            🌿 分支: ${{ github.ref_name }}
            👤 提交者: ${{ github.actor }}
            📝 提交信息: ${{ github.event.head_commit.message }}
            
            ${{ job.status == 'success' && '✅ 部署成功' || '❌ 部署失败' }}
            
            ${{ job.status == 'success' && '⚠️  请记住手动运行数据库迁移: docker-compose exec api ./main migrate' || '' }}
            
            🌐 API: https://api.photography.iriver.top/health
            📊 监控: https://admin.photography.iriver.top

  rollback:
    name: 🔄 回滚部署
    runs-on: ubuntu-latest
    if: failure() && github.ref == 'refs/heads/main'
    needs: build-and-deploy

    steps:
      - name: 🔄 执行回滚
        uses: appleboy/ssh-action@v1.0.0
        with:
          host: ${{ secrets.HOST }}
          username: ${{ secrets.TYY_USER }}
          password: ${{ secrets.TYY_PWD }}
          port: ${{ secrets.PORT }}
          script: |
            cd /data/docker/photography/backend
            
            echo "🔄 开始回滚后端服务..."
            
            # 查找最新的备份容器
            BACKUP_IMAGE=$(docker images photography_backend_backup_* --format "table {{.Repository}}:{{.Tag}}\t{{.CreatedAt}}" | tail -n +2 | sort -k2 -r | head -n 1 | awk '{print $1}')
            
            if [ -n "$BACKUP_IMAGE" ]; then
              echo "📦 找到备份镜像: $BACKUP_IMAGE"
              
              # 停止当前服务
              docker-compose down backend
              
              # 标记备份镜像为最新
              docker tag $BACKUP_IMAGE photography_backend:rollback
              
              # 修改 docker-compose 使用回滚镜像
              sed -i 's|build: .*|image: photography_backend:rollback|g' docker-compose.yml
              
              # 启动回滚版本
              docker-compose up -d backend
              
              echo "✅ 回滚完成"
            else
              echo "❌ 未找到备份镜像，无法回滚"
              exit 1
            fi