name: Build and Publish Docker Image

on:
  push:
    tags:
      - "v*"

jobs:
  build-and-push:
    name: Build and Push to GHCR
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

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

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

      - name: Log in to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata for Docker
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ghcr.io/${{ github.repository }}
          tags: |
            type=semver,pattern={{version}}
            type=raw,value=latest

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

      - name: Get release
        id: get_release
        uses: bruceadams/get-release@v1.3.2
        env:
          GITHUB_TOKEN: ${{ github.token }}

      - name: Attach image to release
        uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const fs = require('fs');
            const release_id = '${{ steps.get_release.outputs.id }}';
            const tag_name = '${{ github.ref_name }}';
            const image_name = 'ghcr.io/${{ github.repository }}:${{ github.ref_name }}';

            await github.rest.repos.updateRelease({
              owner: context.repo.owner,
              repo: context.repo.repo,
              release_id: release_id,
              body: `Docker image: \`${image_name}\`\n\nAlso available as \`ghcr.io/${{ github.repository }}:latest\``
            });

            console.log(`Updated release ${release_id} with Docker image information`);