name: Build and Publish Docker Images

on:
  push:
    branches: [main, develop]
    tags: ["v*"]
  pull_request:
    branches: [main]
  workflow_dispatch:
    inputs:
      platforms:
        description: "Platforms to build (comma-separated)"
        required: false
        default: "linux/amd64,linux/arm64"
        type: string
      push_to_registry:
        description: "Push to registry"
        required: false
        default: true
        type: boolean

permissions:
  contents: read      # ソースコードのクローンに必要
  packages: write     # GHCR へイメージをプッシュするのに必要

env:
  REGISTRY: ghcr.io
  IMAGE_NAME_1: ${{ github.repository_owner }}/voice-rss-summary

jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

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

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

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

      - name: Log in to Container Registry
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: |
            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME_1 }}
          tags: |
            type=ref,event=branch
            type=ref,event=pr
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=semver,pattern={{major}}
            type=raw,value=latest,enable={{is_default_branch}}

      - name: Determine platforms
        id: platforms
        run: |
          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
            echo "platforms=${{ github.event.inputs.platforms }}" >> $GITHUB_OUTPUT
          elif [ "${{ github.event_name }}" = "pull_request" ]; then
            echo "platforms=linux/amd64" >> $GITHUB_OUTPUT
          else
            echo "platforms=linux/amd64,linux/arm64" >> $GITHUB_OUTPUT
          fi

      - name: Determine push setting
        id: push
        run: |
          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
            echo "push=${{ github.event.inputs.push_to_registry }}" >> $GITHUB_OUTPUT
          elif [ "${{ github.event_name }}" = "pull_request" ]; then
            echo "push=false" >> $GITHUB_OUTPUT
          else
            echo "push=true" >> $GITHUB_OUTPUT
          fi

      - name: Build and push Docker image
        uses: docker/build-push-action@v5
        with:
          context: .
          platforms: ${{ steps.platforms.outputs.platforms }}
          push: ${{ steps.push.outputs.push }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max
          build-args: |
            BUILDKIT_INLINE_CACHE=1

      - name: Generate summary
        if: always()
        run: |
          echo "## Build Summary" >> $GITHUB_STEP_SUMMARY
          echo "- **Event**: ${{ github.event_name }}" >> $GITHUB_STEP_SUMMARY
          echo "- **Ref**: ${{ github.ref }}" >> $GITHUB_STEP_SUMMARY
          echo "- **Platforms**: ${{ steps.platforms.outputs.platforms }}" >> $GITHUB_STEP_SUMMARY
          echo "- **Push to registry**: ${{ steps.push.outputs.push }}" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "### Images built:" >> $GITHUB_STEP_SUMMARY
          echo '```' >> $GITHUB_STEP_SUMMARY
          echo "${{ steps.meta.outputs.tags }}" >> $GITHUB_STEP_SUMMARY
          echo '```' >> $GITHUB_STEP_SUMMARY