# ============================================
# 构建并推送 Docker 镜像到 GitHub Container Registry
# ============================================
name: Build and Push Docker Images

on:
  push:
    branches:
      - master
    tags:
      - 'v*'
  pull_request:
    branches:
      - master
  workflow_dispatch:

env:
  REGISTRY: ghcr.io
  NAMESPACE: ${{ github.repository_owner }}
  BACKEND_IMAGE: idc-backend
  FRONTEND_IMAGE: idc-frontend

jobs:
  build-backend:
    name: Build Backend Image
    runs-on: ubuntu-latest
    if: github.event_name != 'pull_request'

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

      - name: 登录 GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: 提取版本号
        id: meta
        run: |
          if [[ "${{ github.ref_type }}" == "tag" ]]; then
            VERSION=${GITHUB_REF#refs/tags/}
          else
            VERSION=latest
          fi
          echo "VERSION=${VERSION}" >> $GITHUB_OUTPUT
          echo "COMMIT_SHA=${GITHUB_SHA::7}" >> $GITHUB_OUTPUT

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

      - name: 构建并推送后端镜像
        uses: docker/build-push-action@v5
        with:
          context: ./backend
          file: ./backend/Dockerfile
          push: true
          tags: |
            ${{ env.REGISTRY }}/${{ env.NAMESPACE }}/${{ env.BACKEND_IMAGE }}:${{ steps.meta.outputs.VERSION }}
            ${{ env.REGISTRY }}/${{ env.NAMESPACE }}/${{ env.BACKEND_IMAGE }}:${{ steps.meta.outputs.COMMIT_SHA }}
          cache-from: type=gha
          cache-to: type=gha,mode=max

  build-frontend:
    name: Build Frontend Image
    runs-on: ubuntu-latest
    if: github.event_name != 'pull_request'

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

      - name: 登录 GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: 提取版本号
        id: meta
        run: |
          if [[ "${{ github.ref_type }}" == "tag" ]]; then
            VERSION=${GITHUB_REF#refs/tags/}
          else
            VERSION=latest
          fi
          echo "VERSION=${VERSION}" >> $GITHUB_OUTPUT
          echo "COMMIT_SHA=${GITHUB_SHA::7}" >> $GITHUB_OUTPUT

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

      - name: 构建并推送前端镜像
        uses: docker/build-push-action@v5
        with:
          context: ./frontend
          file: ./frontend/Dockerfile
          push: true
          tags: |
            ${{ env.REGISTRY }}/${{ env.NAMESPACE }}/${{ env.FRONTEND_IMAGE }}:${{ steps.meta.outputs.VERSION }}
            ${{ env.REGISTRY }}/${{ env.NAMESPACE }}/${{ env.FRONTEND_IMAGE }}:${{ steps.meta.outputs.COMMIT_SHA }}
          cache-from: type=gha
          cache-to: type=gha,mode=max

  notify:
    name: Notify Build Complete
    runs-on: ubuntu-latest
    needs: [build-backend, build-frontend]
    if: always() && github.event_name != 'pull_request'

    steps:
      - name: 输出构建结果
        run: |
          echo "=== 构建结果 ==="
          echo "后端镜像: ${{ needs.build-backend.result }}"
          echo "前端镜像: ${{ needs.build-frontend.result }}"
          echo ""
          echo "ghcr.io 镜像地址："
          echo "  后端: ${{ env.REGISTRY }}/${{ env.NAMESPACE }}/${{ env.BACKEND_IMAGE }}:latest"
          echo "  前端: ${{ env.REGISTRY }}/${{ env.NAMESPACE }}/${{ env.FRONTEND_IMAGE }}:latest"
          if [[ "${{ needs.build-backend.result }}" == "success" && "${{ needs.build-frontend.result }}" == "success" ]]; then
            echo "所有镜像构建成功，已推送到 ghcr.io"
          else
            echo "部分镜像构建失败"
            exit 1
          fi