name: CI

on:
  push:
    branches: [master, dev]
  pull_request:
    branches: [master]

env:
  BACKEND_IMAGE: ${{ secrets.DOCKERHUB_USERNAME }}/trekr-backend
  FRONTEND_IMAGE: ${{ secrets.DOCKERHUB_USERNAME }}/trekr-frontend

jobs:
  build:
    name: Build
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

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

      - name: Build backend image
        uses: docker/build-push-action@v5
        with:
          context: ./backend
          push: false
          cache-from: type=gha,scope=backend
          cache-to:   type=gha,scope=backend,mode=max

      - name: Build frontend image
        uses: docker/build-push-action@v5
        with:
          context: ./frontend
          push: false
          cache-from: type=gha,scope=frontend
          cache-to:   type=gha,scope=frontend,mode=max

  push:
    name: Push to DockerHub
    runs-on: ubuntu-latest
    needs: build
    if: github.ref == 'refs/heads/master' && github.event_name == 'push'
    steps:
      - uses: actions/checkout@v4

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

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

      - name: Build and push backend
        uses: docker/build-push-action@v5
        with:
          context: ./backend
          push: true
          platforms: linux/amd64,linux/arm64
          tags: |
            ${{ env.BACKEND_IMAGE }}:latest
            ${{ env.BACKEND_IMAGE }}:${{ github.sha }}
          cache-from: type=gha,scope=backend
          cache-to:   type=gha,scope=backend,mode=max

      - name: Build and push frontend
        uses: docker/build-push-action@v5
        with:
          context: ./frontend
          push: true
          platforms: linux/amd64,linux/arm64
          tags: |
            ${{ env.FRONTEND_IMAGE }}:latest
            ${{ env.FRONTEND_IMAGE }}:${{ github.sha }}
          cache-from: type=gha,scope=frontend
          cache-to:   type=gha,scope=frontend,mode=max