# LandPPT Docker Build & Push Workflow
# 自动构建并推送 Docker 镜像到容器注册表

name: Docker Build and Push

on:
  # 在 main 分支推送时触发
  push:
    branches:
      - main
      - master
    # 仅当以下文件变更时触发
    paths:
      - 'Dockerfile'
      - 'docker-compose.yml'
      - 'docker-entrypoint.sh'
      - 'docker-healthcheck.sh'
      - 'src/**'
      - 'pyproject.toml'
      - 'uv.lock'
      - '.github/workflows/docker-build.yml'
  
  # 在 PR 时进行构建测试（不推送）
  pull_request:
    branches:
      - main
      - master
  
  # 手动触发
  workflow_dispatch:
    inputs:
      push_image:
        description: '是否推送镜像到注册表'
        required: false
        default: 'true'
        type: boolean

env:
  # Docker 镜像名称 - 请根据实际情况修改
  IMAGE_NAME: landppt
  # 构建平台
  PLATFORMS: linux/amd64

jobs:
  build:
    name: Build Docker Image
    runs-on: ubuntu-latest
    
    permissions:
      contents: read
      packages: write
    
    steps:
      # 检出代码
      - name: Checkout Repository
        uses: actions/checkout@v4
      
      # 清理磁盘空间（防止构建时空间不足）
      - name: Free Disk Space
        run: |
          sudo rm -rf /usr/share/dotnet
          sudo rm -rf /usr/local/lib/android
          sudo rm -rf /opt/ghc
          sudo rm -rf /opt/hostedtoolcache/CodeQL
          sudo docker system prune -af
          df -h
      
      # 设置 Docker Buildx（用于高级构建功能）
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
      
      # 登录到 GitHub Container Registry (ghcr.io)
      - name: Login to GitHub Container Registry
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      
      # 登录到 Docker Hub（可选 - 如果需要推送到 Docker Hub）
      # 需要在 Repository Settings > Secrets 中设置 DOCKERHUB_USERNAME 和 DOCKERHUB_TOKEN
      - name: Login to Docker Hub
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
        continue-on-error: true
      
      # 提取 Docker 元数据（标签、标签等）
      - name: Extract Docker Metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: |
            ghcr.io/${{ github.repository_owner }}/${{ env.IMAGE_NAME }}
            ${{ secrets.DOCKERHUB_USERNAME }}/${{ env.IMAGE_NAME }}
          tags: |
            # 最新标签（仅在 main/master 分支）
            type=raw,value=latest,enable={{is_default_branch}}
            # Git 短 SHA
            type=sha,prefix=
            # 分支名称
            type=ref,event=branch
            # PR 编号
            type=ref,event=pr
            # 语义化版本（如果有标签）
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            # 日期标签
            type=raw,value={{date 'YYYYMMDD-HHmmss'}}
      
      # 构建并推送 Docker 镜像
      - name: Build and Push Docker Image
        uses: docker/build-push-action@v5
        with:
          context: .
          file: ./Dockerfile
          platforms: ${{ env.PLATFORMS }}
          # PR 时不推送，仅构建验证
          push: ${{ github.event_name != 'pull_request' && (github.event.inputs.push_image != 'false') }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          # 利用 GitHub Actions 缓存加速构建
          cache-from: type=gha
          cache-to: type=gha,mode=max
          # 构建参数（如需要可添加）
          build-args: |
            BUILDTIME=${{ github.event.repository.updated_at }}
            VERSION=${{ github.sha }}
      
      # 输出镜像摘要
      - name: Image Digest
        run: |
          echo "### Docker Image Built Successfully! :rocket:" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "**Image Tags:**" >> $GITHUB_STEP_SUMMARY
          echo "\`\`\`" >> $GITHUB_STEP_SUMMARY
          echo "${{ steps.meta.outputs.tags }}" >> $GITHUB_STEP_SUMMARY
          echo "\`\`\`" >> $GITHUB_STEP_SUMMARY

  # 安全扫描（可选但推荐）
  security-scan:
    name: Security Scan
    runs-on: ubuntu-latest
    needs: build
    if: github.event_name != 'pull_request'
    
    steps:
      - name: Checkout Repository
        uses: actions/checkout@v4
      
      # 使用 Trivy 扫描 Dockerfile 漏洞
      - name: Run Trivy vulnerability scanner
        uses: aquasecurity/trivy-action@master
        with:
          scan-type: 'config'
          scan-ref: '.'
          format: 'sarif'
          output: 'trivy-results.sarif'
        continue-on-error: true
      
      # 上传扫描结果到 GitHub Security
      - name: Upload Trivy scan results
        uses: github/codeql-action/upload-sarif@v3
        with:
          sarif_file: 'trivy-results.sarif'
        continue-on-error: true