name: CI/CD Pipeline (Zero Downtime)

on:
  push:
    branches: [ production ]

env:
  NODE_VERSION: '20'
  DOCKER_IMAGE: portfolio-app
  CONTAINER_NAME: portfolio-app
  NEW_CONTAINER_NAME: portfolio-app-new

jobs:
  production:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v3

      - name: Setup Node.js
        uses: actions/setup-node@v3
        with:
          node-version: ${{ env.NODE_VERSION }}
          cache: 'npm'

      - name: Install dependencies
        run: npm ci

      - name: Run linting
        run: npm run lint

      - name: Run tests
        run: npm run test

      - name: Build application
        run: npm run build

      - name: Run security scan
        run: |
          echo "🔍 Running npm audit..."
          npm audit --audit-level=high || echo "⚠️ Some vulnerabilities found, but continuing..."

      - name: Build Docker image
        run: |
          docker build -t ${{ env.DOCKER_IMAGE }}:latest .
          docker tag ${{ env.DOCKER_IMAGE }}:latest ${{ env.DOCKER_IMAGE }}:$(date +%Y%m%d-%H%M%S)

      - name: Verify secrets and variables before deployment
        run: |
          echo "🔍 Verifying secrets and variables..."
          
          # Check Variables
          if [ -z "${{ vars.NEXT_PUBLIC_BASE_URL }}" ]; then
            echo "❌ NEXT_PUBLIC_BASE_URL variable is missing!"
            exit 1
          fi
          if [ -z "${{ vars.MY_EMAIL }}" ]; then
            echo "❌ MY_EMAIL variable is missing!"
            exit 1
          fi
          if [ -z "${{ vars.MY_INFO_EMAIL }}" ]; then
            echo "❌ MY_INFO_EMAIL variable is missing!"
            exit 1
          fi
          
          # Check Secrets
          if [ -z "${{ secrets.MY_PASSWORD }}" ]; then
            echo "❌ MY_PASSWORD secret is missing!"
            exit 1
          fi
          if [ -z "${{ secrets.MY_INFO_PASSWORD }}" ]; then
            echo "❌ MY_INFO_PASSWORD secret is missing!"
            exit 1
          fi
          if [ -z "${{ secrets.ADMIN_BASIC_AUTH }}" ]; then
            echo "❌ ADMIN_BASIC_AUTH secret is missing!"
            exit 1
          fi
          
          echo "✅ All required secrets and variables are present"

      - name: Start new container (zero downtime)
        run: |
          echo "🚀 Starting new container for zero-downtime deployment..."
          
          # Start new container with different name
          docker run -d \
            --name ${{ env.NEW_CONTAINER_NAME }} \
            --restart unless-stopped \
            --network portfolio_net \
            -p 3001:3000 \
            -e NODE_ENV=${{ vars.NODE_ENV }} \
            -e LOG_LEVEL=${{ vars.LOG_LEVEL }} \
            -e DATABASE_URL=postgresql://portfolio_user:portfolio_pass@postgres:5432/portfolio_db?schema=public \
            -e REDIS_URL=redis://redis:6379 \
            -e NEXT_PUBLIC_BASE_URL="${{ vars.NEXT_PUBLIC_BASE_URL }}" \
            -e NEXT_PUBLIC_UMAMI_URL="${{ vars.NEXT_PUBLIC_UMAMI_URL }}" \
            -e NEXT_PUBLIC_UMAMI_WEBSITE_ID="${{ vars.NEXT_PUBLIC_UMAMI_WEBSITE_ID }}" \
            -e MY_EMAIL="${{ vars.MY_EMAIL }}" \
            -e MY_INFO_EMAIL="${{ vars.MY_INFO_EMAIL }}" \
            -e MY_PASSWORD="${{ secrets.MY_PASSWORD }}" \
            -e MY_INFO_PASSWORD="${{ secrets.MY_INFO_PASSWORD }}" \
            -e ADMIN_BASIC_AUTH="${{ secrets.ADMIN_BASIC_AUTH }}" \
            ${{ env.DOCKER_IMAGE }}:latest
          
          echo "✅ New container started on port 3001"

      - name: Health check new container
        run: |
          echo "🔍 Health checking new container..."
          sleep 10
          
          # Health check on new container
          for i in {1..30}; do
            if curl -f http://localhost:3001/api/health > /dev/null 2>&1; then
              echo "✅ New container is healthy!"
              break
            fi
            echo "⏳ Waiting for new container to be ready... ($i/30)"
            sleep 2
          done
          
          # Final health check
          if ! curl -f http://localhost:3001/api/health > /dev/null 2>&1; then
            echo "❌ New container failed health check!"
            docker logs ${{ env.NEW_CONTAINER_NAME }}
            exit 1
          fi

      - name: Switch traffic to new container (zero downtime)
        run: |
          echo "🔄 Switching traffic to new container..."
          
          # Stop old container
          docker stop ${{ env.CONTAINER_NAME }} || true
          
          # Remove old container
          docker rm ${{ env.CONTAINER_NAME }} || true
          
          # Rename new container to production name
          docker rename ${{ env.NEW_CONTAINER_NAME }} ${{ env.CONTAINER_NAME }}
          
          # Update port mapping (requires container restart)
          docker stop ${{ env.CONTAINER_NAME }}
          docker rm ${{ env.CONTAINER_NAME }}
          
          # Start with correct port
          docker run -d \
            --name ${{ env.CONTAINER_NAME }} \
            --restart unless-stopped \
            --network portfolio_net \
            -p 3000:3000 \
            -e NODE_ENV=${{ vars.NODE_ENV }} \
            -e LOG_LEVEL=${{ vars.LOG_LEVEL }} \
            -e DATABASE_URL=postgresql://portfolio_user:portfolio_pass@postgres:5432/portfolio_db?schema=public \
            -e REDIS_URL=redis://redis:6379 \
            -e NEXT_PUBLIC_BASE_URL="${{ vars.NEXT_PUBLIC_BASE_URL }}" \
            -e NEXT_PUBLIC_UMAMI_URL="${{ vars.NEXT_PUBLIC_UMAMI_URL }}" \
            -e NEXT_PUBLIC_UMAMI_WEBSITE_ID="${{ vars.NEXT_PUBLIC_UMAMI_WEBSITE_ID }}" \
            -e MY_EMAIL="${{ vars.MY_EMAIL }}" \
            -e MY_INFO_EMAIL="${{ vars.MY_INFO_EMAIL }}" \
            -e MY_PASSWORD="${{ secrets.MY_PASSWORD }}" \
            -e MY_INFO_PASSWORD="${{ secrets.MY_INFO_PASSWORD }}" \
            -e ADMIN_BASIC_AUTH="${{ secrets.ADMIN_BASIC_AUTH }}" \
            ${{ env.DOCKER_IMAGE }}:latest
          
          echo "✅ Traffic switched successfully!"

      - name: Final health check
        run: |
          echo "🔍 Final health check..."
          sleep 5
          
          for i in {1..10}; do
            if curl -f http://localhost:3000/api/health > /dev/null 2>&1; then
              echo "✅ Deployment successful! Zero downtime achieved!"
              break
            fi
            echo "⏳ Final health check... ($i/10)"
            sleep 2
          done
          
          if ! curl -f http://localhost:3000/api/health > /dev/null 2>&1; then
            echo "❌ Final health check failed!"
            docker logs ${{ env.CONTAINER_NAME }}
            exit 1
          fi

      - name: Cleanup old images
        run: |
          echo "🧹 Cleaning up old images..."
          docker image prune -f
          docker system prune -f
          echo "✅ Cleanup completed"