name: CI/CD Pipeline (Fully Isolated DinD)

on:
  push:
    branches: [ main, develop ]
  pull_request:
    branches: [ main ]

env:
  REGISTRY: ${{ secrets.CI_HOST }}:5000
  IMAGE_NAME: ${{ secrets.APP_NAME || 'sharenet' }}

jobs:
  # Job 1: Testing - Uses DinD with multiple containers for comprehensive testing
  test:
    name: Run Tests (DinD)
    runs-on: [self-hosted, dind]
    if: github.ref == 'refs/heads/main'

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

    - name: Setup Containerized Testing Environment
      run: |
        # Start testing environment using dedicated compose file
        docker compose -f docker-compose.test.yml up -d
        
        # Wait for all services to be ready
        echo "Waiting for testing environment to be ready..."
        timeout 120 bash -c 'until docker compose -f docker-compose.test.yml ps | grep -q "healthy" && docker compose -f docker-compose.test.yml ps | grep -q "Up"; do sleep 2; done'
        
        # Verify all containers are running
        docker compose -f docker-compose.test.yml ps

    - name: Install SQLx CLI in Rust container
      run: |
        docker exec ci-cd-test-rust cargo install sqlx-cli --no-default-features --features postgres

    - name: Validate migration files
      env:
        DATABASE_URL: postgres://postgres:postgres@localhost:5432/sharenet_test
      run: |
        # Wait for PostgreSQL to be ready
        echo "Waiting for PostgreSQL to be ready..."
        timeout 60 bash -c 'until pg_isready -h localhost -p 5432 -U postgres; do sleep 1; done'
        
        # Create test database if it doesn't exist
        docker exec ci-cd-test-rust sqlx database create --database-url "$DATABASE_URL" || true
        
        # Run initial migrations to set up the database
        docker exec ci-cd-test-rust sqlx migrate run --database-url "$DATABASE_URL" || true
        
        # Validate migration files
        docker exec ci-cd-test-rust ./scripts/validate_migrations.sh --verbose

    - name: Run backend tests
      working-directory: ./backend
      env:
        DATABASE_URL: postgres://postgres:postgres@localhost:5432/sharenet_test
      run: |
        # Run tests with increased parallelism for Rust
        docker exec ci-cd-test-rust cargo test --all --jobs 4
        docker exec ci-cd-test-rust cargo clippy --all -- -D warnings
        docker exec ci-cd-test-rust cargo fmt --all -- --check

    - name: Install frontend dependencies
      run: |
        docker exec ci-cd-test-node npm ci

    - name: Run frontend tests
      run: |
        docker exec ci-cd-test-node npm run lint
        docker exec ci-cd-test-node npm run type-check
        docker exec ci-cd-test-node npm run build

    - name: Cleanup Containerized Environment
      if: always()
      run: |
        # Stop and remove all testing containers
        docker compose -f docker-compose.test.yml down

  # Job 2: Building - Uses DinD for isolated image building and pushing
  build-and-push:
    name: Build and Push Docker Images (DinD)
    needs: [test]
    runs-on: [self-hosted, dind]
    if: github.ref == 'refs/heads/main'

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

    - name: Setup DinD environment
      run: |
        # Start DinD container for isolated Docker operations
        docker run -d \
          --name ci-cd-build-dind \
          --privileged \
          -p 2375:2375 \
          -e DOCKER_TLS_CERTDIR="" \
          docker:dind
        
        # Wait for DinD to be ready
        echo "Waiting for DinD container to be ready..."
        timeout 60 bash -c 'until docker exec ci-cd-build-dind docker version; do sleep 2; done'
        
        # Configure Docker for Harbor registry (needed for pushing images)
        docker exec ci-cd-build-dind sh -c 'echo "{\"insecure-registries\": [\"${{ secrets.CI_HOST }}:5000\"]}" > /etc/docker/daemon.json'
        docker exec ci-cd-build-dind sh -c 'kill -HUP 1'
        
        # Wait for Docker daemon to reload
        sleep 5
        
        # Verify DinD is working
        docker exec ci-cd-build-dind docker version

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

    - name: Build and push backend image
      uses: docker/build-push-action@v5
      with:
        context: ./backend
        file: ./backend/Dockerfile
        push: true
        tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}/backend:${{ github.sha }}
        cache-from: type=gha
        cache-to: type=gha,mode=max
        platforms: linux/amd64

    - name: Build and push frontend image
      uses: docker/build-push-action@v5
      with:
        context: ./frontend
        file: ./frontend/Dockerfile
        push: true
        tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}/frontend:${{ github.sha }}
        cache-from: type=gha
        cache-to: type=gha,mode=max
        platforms: linux/amd64

    - name: Cleanup DinD environment
      if: always()
      run: |
        # Stop and remove DinD container
        docker stop ci-cd-build-dind || true
        docker rm ci-cd-build-dind || true

  # Job 3: Deployment - Runs directly on production runner (no DinD needed)
  deploy:
    name: Deploy to Production
    needs: build-and-push
    runs-on: [self-hosted, production]
    if: github.ref == 'refs/heads/main'

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

    - name: Create environment file for deployment
      run: |
        # Create environment file for this deployment
        echo "IMAGE_TAG=${{ github.sha }}" > .env
        echo "REGISTRY=${{ secrets.CI_HOST }}:5000" >> .env
        echo "IMAGE_NAME=${{ secrets.APP_NAME || 'sharenet' }}" >> .env
        echo "POSTGRES_PASSWORD=${{ secrets.POSTGRES_PASSWORD || 'your_secure_password_here' }}" >> .env
        echo "POSTGRES_USER=${{ secrets.POSTGRES_USER || 'sharenet' }}" >> .env
        echo "POSTGRES_DB=${{ secrets.POSTGRES_DB || 'sharenet' }}" >> .env
        echo "DATABASE_URL=postgresql://${{ secrets.POSTGRES_USER || 'sharenet' }}:${{ secrets.POSTGRES_PASSWORD || 'your_secure_password_here' }}@postgres:5432/${{ secrets.POSTGRES_DB || 'sharenet' }}" >> .env
        echo "NODE_ENV=production" >> .env
        echo "RUST_LOG=info" >> .env

    - name: Make scripts executable
      run: chmod +x scripts/*.sh

    - name: Configure Docker for Harbor access
      run: |
        # Configure Docker to access Harbor registry on CI Linode
        echo '{"insecure-registries": ["${{ secrets.CI_HOST }}:5000"]}' | sudo tee /etc/docker/daemon.json
        sudo systemctl restart docker
        
        # Wait for Docker to be ready
        timeout 30 bash -c 'until docker info; do sleep 1; done'

    - name: Validate migration files
      run: |
        echo "Validating migration files before deployment..."
        ./scripts/validate_migrations.sh --verbose || {
          echo "ERROR: Migration validation failed. Deployment aborted."
          exit 1
        }

    - name: Pull and deploy application
      run: |
        # Pull latest images from Harbor registry
        echo "Pulling latest images from Harbor registry..."
        docker compose -f docker-compose.prod.yml pull
        
        # Deploy the application stack
        echo "Deploying application stack..."
        docker compose -f docker-compose.prod.yml up -d
        
        # Wait for all services to be healthy
        echo "Waiting for all services to be healthy..."
        timeout 120 bash -c 'until docker compose -f docker-compose.prod.yml ps | grep -q "healthy" && docker compose -f docker-compose.prod.yml ps | grep -q "Up"; do sleep 2; done'
        
        # Verify deployment
        echo "Verifying deployment..."
        docker compose -f docker-compose.prod.yml ps