name: Build and Push Docker Image

on:
  push:
    branches:
      - master
      - develop
  pull_request:
    branches:
      - master
      - develop
  workflow_dispatch:

jobs:
  build_docker_image:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

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

      - name: Log in to Docker Hub
        # 只有当你的 DOCKER_USERNAME 存在时才执行此步骤
        if: secrets.DOCKER_USERNAME != ''
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}

      - name: Extract Docker metadata (tags, labels)
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ secrets.DOCKER_USERNAME }}/nostr-relay # 你的 Docker Hub 仓库名称，替换为你的用户名
          tags: |
            type=schedule
            type=ref,event=branch
            type=ref,event=pr
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=semver,pattern={{major}}
            type=sha,format=long,prefix=
            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' || github.ref == 'refs/heads/master' }} # main/master 分支打 latest 标签

      - name: Build and push Docker image
        uses: docker/build-push-action@v5
        with:
          context: .
          file: ./Dockerfile
          push: ${{ github.event_name != 'pull_request' }} # 只有在非 PR 事件时才推送
          tags: ${{ steps.meta.outputs.tags }} # 使用 docker/metadata-action 生成的标签
          labels: ${{ steps.meta.outputs.labels }} # 使用 docker/metadata-action 生成的标签
          cache-from: type=gha # 启用 GitHub Actions 缓存构建层
          cache-to: type=gha,mode=max # 将构建层写入缓存