name: Build and Publish Application Image

on:
  workflow_call:
    inputs:
      name:
        required: true
        type: string
        description: "The name of the application to build."
      dockerfile:
        required: false
        type: string
        default: "Dockerfile"
        description: "The Dockerfile to use for building the image."
      flavor:
        required: false
        type: string
        default: ""
        description: "The flavor of the image to build."
      platforms:
        required: false
        type: string
        default: "linux/amd64"
        description: "The platforms to build for."

env:
  FLAVOR_PREFIX: ${{ inputs.flavor && format('{0}-', inputs.flavor) || '' }}

jobs:
  build-app:
    name: Build and Publish Application Image
    runs-on: ubuntu-latest
    permissions:
      packages: write
      contents: read
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

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

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

      - name: Extract metadata (tags, labels) for Docker
        uses: docker/metadata-action@v5
        id: meta
        with:
          images: ghcr.io/${{ github.repository }}/${{ env.FLAVOR_PREFIX }}${{ inputs.name }}
          tags: |
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=semver,pattern={{major}}
            type=sha,format=long

      - name: Log in to the 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: apps/${{ inputs.name }}
          file: apps/${{ inputs.name }}/${ inputs.dockerfile || 'Dockerfile' }}
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          build-args: |
            BASE_IMAGE=ghcr.io/${{ github.repository }}/${{ env.FLAVOR_PREFIX }}base:sha-${{ github.sha }}
          platforms: ${{ inputs.platforms || 'linux/amd64' }}