name: Build and Push Docker Images

on:
  push:
    branches: [ main ]
    tags: [ 'v*' ]
    paths:
      - 'backend/**'
      - 'frontend/**'
      - '.gitea/workflows/docker-build.yml'
  workflow_dispatch:

jobs:
  changes:
    runs-on: docker
    container:
      image: ghcr.io/catthehacker/ubuntu:act-latest
    outputs:
      backend: ${{ steps.filter.outputs.backend }}
      frontend: ${{ steps.filter.outputs.frontend }}
    steps:
      - name: Checkout Repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0  # Needed to get all history for path filtering

      - name: Check for changed files
        id: filter
        shell: bash
        run: |
          echo "Checking for changes..."
          
          # Initialize outputs
          BACKEND="false"
          FRONTEND="false"
          
          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
            echo "Workflow manually triggered - building both"
            BACKEND="true"
            FRONTEND="true"
          elif [ "${{ github.ref }}" = refs/tags/* ]; then
            echo "Tag detected - building both"
            BACKEND="true"
            FRONTEND="true"
          else
            echo "Checking changed files..."
          
            # For push events, compare with the parent commit
            if [ "${{ github.event_name }}" = "push" ]; then
              echo "Push event detected"
              # Get the parent commit
              PARENT_SHA=$(git rev-parse HEAD^)
              CURRENT_SHA=${{ github.sha }}
          
              echo "Comparing parent ${PARENT_SHA} with current ${CURRENT_SHA}"
          
              # List all changed files
              CHANGED_FILES=$(git diff --name-only ${PARENT_SHA} ${CURRENT_SHA})
              echo "Changed files:"
              echo "$CHANGED_FILES"
          
              # Check for changes in specific directories
              if echo "$CHANGED_FILES" | grep -q "^backend/"; then
                echo "Backend changes detected"
                BACKEND="true"
              fi
          
              if echo "$CHANGED_FILES" | grep -q "^frontend/"; then
                echo "Frontend changes detected"
                FRONTEND="true"
              fi
            fi
          fi
          
          # Output results
          echo "backend=$BACKEND" >> $GITHUB_OUTPUT
          echo "frontend=$FRONTEND" >> $GITHUB_OUTPUT
          
          # Debug output
          echo "Debug: Backend will build: $BACKEND"
          echo "Debug: Frontend will build: $FRONTEND"


  build-backend:
    needs: changes
    if: ${{ needs.changes.outputs.backend == 'true' }}
    runs-on: docker
    container:
      image: ghcr.io/catthehacker/ubuntu:act-latest
    steps:
      - name: Debug output
        run: |
          echo "Backend build triggered"
          echo "Backend output was: ${{ needs.changes.outputs.backend }}"
      - name: Checkout Repository
        uses: actions/checkout@v4

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

      - name: Login to Gitea Registry
        uses: docker/login-action@v3
        with:
          registry: gitea.pragmazest.com
          username: ${{ secrets.DOCKER_REGISTRY_USERNAME }}
          password: ${{ secrets.DOCKER_REGISTRY_ACCESS_TOKEN }}

      - name: Extract metadata
        id: meta
        shell: bash
        run: |
          if [ "$GITHUB_REF" = refs/tags/* ]; then
            VERSION=${GITHUB_REF#refs/tags/v}
          else
            VERSION=latest
          fi
          echo "version=${VERSION}" >> $GITHUB_OUTPUT
          echo "date=$(date -u +'%Y-%m-%dT%H:%M:%SZ')" >> $GITHUB_OUTPUT

      - name: Build and push backend
        uses: docker/build-push-action@v5
        with:
          context: ./backend
          file: ./backend/Dockerfile
          push: true
          target: production
          tags: |
            gitea.pragmazest.com/${{ github.repository }}/backend:${{ steps.meta.outputs.version }}
            gitea.pragmazest.com/${{ github.repository }}/backend:latest
          labels: |
            org.opencontainers.image.created=${{ steps.meta.outputs.date }}
            org.opencontainers.image.version=${{ steps.meta.outputs.version }}
            org.opencontainers.image.revision=${{ github.sha }}

      - name: Image digest
        run: |
          echo "Backend image: gitea.pragmazest.com/${{ github.repository }}/backend:${{ steps.meta.outputs.version }}"

  build-frontend:
    needs: changes
    if: ${{ needs.changes.outputs.frontend == 'true' }}
    runs-on: docker
    container:
      image: ghcr.io/catthehacker/ubuntu:act-latest
    steps:
      - name: Debug output
        run: |
          echo "Frontend build triggered"
          echo "Frontend output was: ${{ needs.changes.outputs.frontend }}"
      - name: Checkout Repository
        uses: actions/checkout@v4

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

      - name: Login to Gitea Registry
        uses: docker/login-action@v3
        with:
          registry: gitea.pragmazest.com
          username: ${{ secrets.DOCKER_REGISTRY_USERNAME }}
          password: ${{ secrets.DOCKER_REGISTRY_ACCESS_TOKEN }}

      - name: Extract metadata
        id: meta
        shell: bash
        run: |
          if [ "$GITHUB_REF" = refs/tags/* ]; then
            VERSION=${GITHUB_REF#refs/tags/v}
          else
            VERSION=latest
          fi
          echo "version=${VERSION}" >> $GITHUB_OUTPUT
          echo "date=$(date -u +'%Y-%m-%dT%H:%M:%SZ')" >> $GITHUB_OUTPUT

      - name: Build and push frontend
        uses: docker/build-push-action@v5
        with:
          context: ./frontend
          file: ./frontend/Dockerfile
          push: true
          target: runner
          tags: |
            gitea.pragmazest.com/${{ github.repository }}/frontend:${{ steps.meta.outputs.version }}
            gitea.pragmazest.com/${{ github.repository }}/frontend:latest
          labels: |
            org.opencontainers.image.created=${{ steps.meta.outputs.date }}
            org.opencontainers.image.version=${{ steps.meta.outputs.version }}
            org.opencontainers.image.revision=${{ github.sha }}

      - name: Image digest
        run: |
          echo "Frontend image: gitea.pragmazest.com/${{ github.repository }}/frontend:${{ steps.meta.outputs.version }}"