name: Docker Build and Publish

on:
  push:
    branches:
      - main
      - github-actions

jobs:
  build-and-push:
    runs-on: ubuntu-latest
    outputs:
      EXISTS: ${{ steps.check-version.outputs.EXISTS }}
      VERSION: ${{ steps.package-version.outputs.VERSION }}

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

      - name: Set up Node.js
        uses: actions/setup-node@v4
        with:
          node-version: "20"

      - name: Get version from package.json
        id: package-version
        run: echo "VERSION=$(node -p "require('./package.json').version")" >> $GITHUB_OUTPUT

      - name: Login to DockerHub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Check if version exists
        id: check-version
        run: |
          if docker pull dohsimpson/habittrove:v${{ steps.package-version.outputs.VERSION }} 2>/dev/null; then
            echo "EXISTS=true" >> $GITHUB_OUTPUT
          else
            echo "EXISTS=false" >> $GITHUB_OUTPUT
          fi

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

      - name: Build and push Docker images
        uses: docker/build-push-action@v5
        with:
          context: .
          platforms: linux/amd64,linux/arm64
          push: true
          tags: |
            ${{ steps.check-version.outputs.EXISTS == 'false' && format('dohsimpson/habittrove:v{0}', steps.package-version.outputs.VERSION) || '' }}
            ${{ steps.check-version.outputs.EXISTS == 'false' && 'dohsimpson/habittrove:latest' || '' }}
            dohsimpson/habittrove:dev

  deploy-demo:
    runs-on: ubuntu-latest
    needs: build-and-push
    # demo tracks the latest tag
    if: needs.build-and-push.outputs.EXISTS == 'false'
    steps:
      - uses: actions/checkout@v4
      - uses: actions-hub/kubectl@master
        env:
          KUBE_CONFIG: ${{ secrets.KUBE_CONFIG }}
        with:
          args: rollout restart -n ${{ secrets.KUBE_NAMESPACE }} deploy/${{ secrets.KUBE_DEPLOYMENT }}

  create-release:
    runs-on: ubuntu-latest
    needs: build-and-push
    if: needs.build-and-push.outputs.EXISTS == 'false'
    permissions:
      contents: write
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Create GitHub release
        env:
          GH_TOKEN: ${{ secrets.GH_TOKEN }}
          VERSION: ${{ needs.build-and-push.outputs.VERSION }}
        run: |
          # Extract release notes from CHANGELOG.md
          notes=$(awk -v version="$VERSION" '
            $0 ~ "## Version " version {flag=1;next}
            $0 ~ "## Version " && flag {exit}
            flag' CHANGELOG.md)

          gh release create "v$VERSION" \
              --repo="$GITHUB_REPOSITORY" \
              --title="v$VERSION" \
              --notes="$notes"