name: Build and Publish Docker Image

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

env:
  IMAGE_NAME: ${{ forgejo.repository }}/fizika-admin

jobs:
  build-and-push:
    runs-on: ubuntu-docker

    steps:
      - name: Checkout repository
        uses: https://code.forgejo.org/actions/checkout@v4

      - name: Extract registry host
        id: registry
        run: echo "host=$(echo '${{ forgejo.server_url }}' | sed 's|https\?://||')" >> "$GITHUB_OUTPUT"

      - name: Log into Forgejo registry
        if: forgejo.event_name != 'pull_request'
        run: echo "${{ secrets.FORGEJO_TOKEN }}" | docker login "${{ steps.registry.outputs.host }}" -u "${{ forgejo.actor }}" --password-stdin

      - name: Build Docker image
        run: |
          IMAGE="${{ steps.registry.outputs.host }}/$(echo "${{ env.IMAGE_NAME }}" | tr '[:upper:]' '[:lower:]')"
          SHA_SHORT="$(echo "${{ forgejo.sha }}" | cut -c1-12)"
          TAG_ARGS="-t ${IMAGE}:sha-${SHA_SHORT}"

          if [ "${{ forgejo.ref }}" = "refs/heads/main" ]; then
            TAG_ARGS="${TAG_ARGS} -t ${IMAGE}:main -t ${IMAGE}:latest"
          fi

          if [ "${{ forgejo.ref_type }}" = "tag" ]; then
            REF_NAME="${{ forgejo.ref_name }}"
            TAG_ARGS="${TAG_ARGS} -t ${IMAGE}:${REF_NAME}"

            if echo "$REF_NAME" | grep -Eq '^v[0-9]+\.[0-9]+\.[0-9]+$'; then
              VERSION="${REF_NAME#v}"
              MAJOR_MINOR="$(echo "$VERSION" | cut -d. -f1,2)"
              MAJOR="$(echo "$VERSION" | cut -d. -f1)"
              TAG_ARGS="${TAG_ARGS} -t ${IMAGE}:${VERSION} -t ${IMAGE}:${MAJOR_MINOR} -t ${IMAGE}:${MAJOR}"
            fi
          fi

          docker build \
            --label "org.opencontainers.image.source=${{ forgejo.server_url }}/${{ forgejo.repository }}" \
            --label "org.opencontainers.image.revision=${{ forgejo.sha }}" \
            --label "org.opencontainers.image.created=$(date -u +'%Y-%m-%dT%H:%M:%SZ')" \
            ${TAG_ARGS} \
            ./backend

          echo "IMAGE=${IMAGE}" >> "$GITHUB_ENV"

      - name: Push Docker image
        if: forgejo.event_name != 'pull_request'
        run: docker push --all-tags "$IMAGE"