name: Release Docker Image

on:
  release:
    types: [published]
  workflow_dispatch:
    inputs:
      release_tag:
        description: "Release tag to build"
        required: true

permissions:
  contents: read
  packages: write

jobs:
  build-and-push:
    name: Build and push image to GHCR
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Prepare image name (lowercase)
        id: prep
        run: |
          REPO_LC="${GITHUB_REPOSITORY,,}"
          echo "IMAGE=ghcr.io/${REPO_LC}" >> $GITHUB_ENV
          if [ "${{ github.event_name }}" = "release" ]; then
            echo "RELEASE_VERSION=${{ github.event.release.tag_name }}" >> $GITHUB_ENV
          else
            echo "RELEASE_VERSION=${{ github.event.inputs.release_tag }}" >> $GITHUB_ENV
          fi

      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.IMAGE }}
          tags: |
            type=raw,value=${{ env.RELEASE_VERSION }}

      - name: Add "latest" tag for any non-prerelease release
        run: echo "EXTRA_TAGS=${{ env.IMAGE }}:latest" >> $GITHUB_ENV

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

      - name: Build and push
        uses: docker/build-push-action@v6
        with:
          context: .
          file: Dockerfile
          push: true
          platforms: linux/amd64,linux/arm64
          tags: |
            ${{ steps.meta.outputs.tags }}
            ${{ env.EXTRA_TAGS }}
          labels: ${{ steps.meta.outputs.labels }}
          build-args: |
            RELEASE_VERSION=${{ env.RELEASE_VERSION }}