name: Build and Publish Docker Image

on:
  push:
    # branches: [main]
    tags: ["v*"]
  workflow_dispatch:
    inputs:
      version:
        description: "Version to set (e.g. v1.2.3). Leave empty to auto-detect."
        required: false
        default: ""

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  build-and-push:
    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: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Determine version
        id: version
        run: |
          if [[ -n "${{ github.event.inputs.version }}" ]]; then
            echo "value=${{ github.event.inputs.version }}" >> "$GITHUB_OUTPUT"
          elif [[ "${{ github.ref_type }}" == "tag" ]]; then
            echo "value=${{ github.ref_name }}" >> "$GITHUB_OUTPUT"
          else
            TAG=$(git describe --tags --abbrev=0 2>/dev/null || echo "development")
            echo "value=${TAG}" >> "$GITHUB_OUTPUT"
          fi

      - name: Extract metadata (tags, labels)
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=raw,value=latest
            type=semver,pattern=v{{version}}

      - name: Build and push Docker image
        uses: docker/build-push-action@v6
        with:
          context: .
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          build-args: |
            APP_VERSION=${{ steps.version.outputs.value }}
          cache-from: type=gha
          cache-to: type=gha,mode=max