name: Build and publish Docker image

on:
  push:
    branches: [main]
    tags: ['v*']
  workflow_dispatch:

jobs:
  build-and-push:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

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

      - name: Resolve registry and image metadata
        id: meta
        run: |
          host="${GITEA_SERVER_URL#*://}"
          image="$host/${GITEA_REPOSITORY,,}"
          echo "host=$host" >> "$GITHUB_OUTPUT"
          echo "image=$image" >> "$GITHUB_OUTPUT"
          if [ "$GITEA_REF_TYPE" = "tag" ]; then
            echo "tag=$GITEA_REF_NAME" >> "$GITHUB_OUTPUT"
          else
            echo "tag=latest" >> "$GITHUB_OUTPUT"
          fi
        env:
          GITEA_SERVER_URL: ${{ gitea.server_url }}
          GITEA_REPOSITORY: ${{ gitea.repository }}
          GITEA_REF_TYPE: ${{ gitea.ref_type }}
          GITEA_REF_NAME: ${{ gitea.ref_name }}

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

      - name: Build and push
        uses: docker/build-push-action@v6
        with:
          context: .
          push: true
          tags: |
            ${{ steps.meta.outputs.image }}:${{ steps.meta.outputs.tag }}
            ${{ steps.meta.outputs.image }}:${{ gitea.sha }}