name: Build Flutter Docker Image

on:
  schedule:
    - cron: '0 3 * * *' # Every day at 03:00 UTC
  workflow_dispatch:
  release: # Trigger on release creation
    types: [ published ]

env:
  IMAGE_NAME: singatias/flutter

jobs:
  build:
    runs-on: ubuntu-latest

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

      - name: Install dependencies
        run: |
          sudo apt-get update
          sudo apt-get install -y jq curl

      - name: Get latest Flutter version
        id: flutter_version
        run: |
          FLUTTER_VERSION=$(curl -s https://storage.googleapis.com/flutter_infra_release/releases/releases_linux.json | \
            jq -r '. as $root | $root.current_release.stable as $stable_hash | $root.releases[] | select(.hash == $stable_hash) | .version')
          echo "FLUTTER_VERSION=$FLUTTER_VERSION" >> $GITHUB_ENV
          echo "Latest Flutter version: $FLUTTER_VERSION"

      - name: Check if Docker image exists
        id: check_image
        run: |
          IMAGE_TAG="${IMAGE_NAME}:${FLUTTER_VERSION}"
          if docker manifest inspect $IMAGE_TAG > /dev/null 2>&1; then
            echo "Image already exists for $FLUTTER_VERSION"
            echo "exists=true" >> $GITHUB_OUTPUT
          else
            echo "Image does not exist for $FLUTTER_VERSION"
            echo "exists=false" >> $GITHUB_OUTPUT
          fi

      - name: Debug - Image Name
        run: |
          echo "Image Name: ${{ env.IMAGE_NAME }}"

      - name: Debug - Image Version
        run: |
          echo "Flutter Version: ${{ env.FLUTTER_VERSION }}"

      - name: Debug - Image Exists
        run: |
          echo "Exists: ${{ steps.check_image.outputs.exists }}"

      - name: Log in to DockerHub
        if: steps.check_image.outputs.exists == 'false'
        uses: docker/login-action@v2
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_ACCESS_TOKEN }}

      - name: Build, push, and generate SBOM and provenance
        # if: steps.check_image.outputs.exists == 'false'
        run: |
          docker buildx build \
            --build-arg FLUTTER_VERSION=${{ FLUTTER_VERSION }} \
            --provenance=true \
            --sbom=true \
            --push \
            -t ${{ IMAGE_NAME }}:${{ FLUTTER_VERSION }} \
            -t ${{ IMAGE_NAME }}:latest \
            .