name: Build and Push Docker Image

on:
  push:
    branches:
      - main
  workflow_dispatch:
  schedule:
    - cron: '0 * * * *'  # Every hour

jobs:
  check-version:
    runs-on: ubuntu-latest
    outputs:
      should_build: ${{ steps.compare.outputs.should_build }}
      latest_version: ${{ steps.get_version.outputs.version }}
    steps:
      - name: Get latest Nicotine+ version from PyPI
        id: get_version
        run: |
          VERSION=$(curl -s https://pypi.org/pypi/nicotine-plus/json | jq -r '.info.version')
          echo "version=$VERSION" >> $GITHUB_OUTPUT
          echo "Latest Nicotine+ version: $VERSION"

      - name: Get current built version
        id: current_version
        run: |
          CURRENT=$(curl -s https://git.nicola.sh/api/v1/repos/public/nicotine-less/releases/latest 2>/dev/null | jq -r '.tag_name // "none"')
          echo "current=$CURRENT" >> $GITHUB_OUTPUT
          echo "Current built version: $CURRENT"

      - name: Compare versions
        id: compare
        run: |
          if [ "${{ steps.get_version.outputs.version }}" != "${{ steps.current_version.outputs.current }}" ]; then
            echo "should_build=true" >> $GITHUB_OUTPUT
            echo "New version detected, will build"
          else
            echo "should_build=false" >> $GITHUB_OUTPUT
            echo "Already up to date"
          fi

  build:
    needs: check-version
    if: needs.check-version.outputs.should_build == 'true' || github.event_name == 'push' || github.event_name == 'workflow_dispatch'
    strategy:
      matrix:
        include:
          - platform: linux/amd64
            runner: linux-amd64
            arch: amd64
          - platform: linux/arm64
            runner: linux-arm64
            arch: arm64
    runs-on: ${{ matrix.runner }}
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

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

      - name: Login to Gitea Container Registry
        uses: docker/login-action@v3
        with:
          registry: git.nicola.sh
          username: ${{ secrets.REGISTRY_USERNAME }}
          password: ${{ secrets.REGISTRY_PASSWORD }}

      - name: Build and push by digest
        id: build
        uses: docker/build-push-action@v5
        with:
          context: .
          platforms: ${{ matrix.platform }}
          outputs: type=image,name=git.nicola.sh/public/nicotine-less,push-by-digest=true,name-canonical=true,push=true
          cache-from: type=registry,ref=git.nicola.sh/public/nicotine-less:buildcache-${{ matrix.platform }}
          cache-to: type=registry,ref=git.nicola.sh/public/nicotine-less:buildcache-${{ matrix.platform }},mode=max

      - name: Export digest
        run: |
          mkdir -p /tmp/digests
          digest="${{ steps.build.outputs.digest }}"
          touch "/tmp/digests/${digest#sha256:}"

      - name: Upload digest
        uses: actions/upload-artifact@v4
        with:
          name: digests-${{ matrix.platform }}
          path: /tmp/digests/*
          if-no-files-found: error
          retention-days: 1

  merge:
    needs: build
    runs-on: linux-amd64
    steps:
      - name: Download digests
        uses: actions/download-artifact@v4
        with:
          path: /tmp/digests
          pattern: digests-*
          merge-multiple: true

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

      - name: Login to Gitea Container Registry
        uses: docker/login-action@v3
        with:
          registry: git.nicola.sh
          username: ${{ secrets.REGISTRY_USERNAME }}
          password: ${{ secrets.REGISTRY_PASSWORD }}

      - name: Create manifest list and push
        working-directory: /tmp/digests
        run: |
          docker buildx imagetools create \
            -t git.nicola.sh/public/nicotine-less:latest \
            -t git.nicola.sh/public/nicotine-less:${{ needs.check-version.outputs.latest_version }} \
            $(printf 'git.nicola.sh/public/nicotine-less@sha256:%s ' *)

      - name: Create release
        if: needs.check-version.outputs.should_build == 'true'
        run: |
          curl -X POST "https://git.nicola.sh/api/v1/repos/public/nicotine-less/releases" \
            -H "Authorization: token ${{ secrets.TOKEN }}" \
            -H "Content-Type: application/json" \
            -d "{
              \"tag_name\": \"${{ needs.check-version.outputs.latest_version }}\",
              \"name\": \"Nicotine+ ${{ needs.check-version.outputs.latest_version }}\",
              \"body\": \"Automated build with Nicotine+ version ${{ needs.check-version.outputs.latest_version }}\"
            }"