name: Build and Push Container

on:
  push:
    branches:
      - main
    tags:
      - 'v*'

jobs:
  build:
    runs-on: ubuntu-latest

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

      - name: Extract registry hostname
        id: registry
        run: |
          echo "host=$(echo '${{ gitea.server_url }}' | sed 's|https://||;s|http://||')" >> $GITHUB_OUTPUT

      - name: Docker metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ steps.registry.outputs.host }}/${{ gitea.repository_owner }}/announcements
          tags: |
            # latest on main branch
            type=raw,value=latest,enable={{is_default_branch}}
            # branch name on non-main pushes
            type=ref,event=branch,enable=${{ gitea.ref_name != 'main' }}
            # semver tags: v1.2.3 → 1.2.3 and 1.2
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            # short SHA always
            type=sha,prefix=,format=short

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

      - name: Log in to Gitea registry
        uses: docker/login-action@v3
        with:
          registry: ${{ steps.registry.outputs.host }}
          username: ${{ gitea.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build and push
        uses: docker/build-push-action@v6
        with:
          context: .
          file: Containerfile
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}