name: Deploy to Production

on:
  push:
    branches: [ main ]

jobs:
  deploy:
    name: Deploy to Server
    runs-on: ubuntu-latest
    
    steps:
    - name: Deploy via SSH
      uses: appleboy/ssh-action@v1.1.0
      with:
        host: ${{ secrets.SERVER_HOST }}
        username: ${{ secrets.SERVER_USER }}
        key: ${{ secrets.SSH_PRIVATE_KEY }}
        script: |
          set -e
          
          echo "🚀 Starting deployment..."
          
          # Navigate to project directory
          cd /root/docfast
          
          # Check current git status
          echo "📋 Current status:"
          git status --short || true
          
          # Pull latest changes
          echo "📥 Pulling latest changes..."
          git fetch origin
          git pull origin main
          
          # Tag current running image for rollback
          echo "🏷️ Tagging current image for rollback..."
          TIMESTAMP=$(date +%Y%m%d-%H%M%S)
          docker tag docfast-docfast:latest docfast-docfast:rollback-$TIMESTAMP || echo "No existing image to tag"
          
          # Build new image
          echo "🔨 Building new Docker image..."
          docker compose build --no-cache
          
          # Stop services gracefully
          echo "⏹️ Stopping services..."
          docker compose down --timeout 30
          
          # Start services
          echo "▶️ Starting services..."
          docker compose up -d
          
          # Wait for service to be ready
          echo "⏱️ Waiting for service to be ready..."
          for i in {1..30}; do
            if curl -f -s http://127.0.0.1:3100/health > /dev/null; then
              echo "✅ Service is healthy!"
              break
            fi
            if [ $i -eq 30 ]; then
              echo "❌ Service failed to start - initiating rollback..."
              docker compose down
              
              # Try to rollback to previous image
              ROLLBACK_IMAGE=$(docker images --format "table {{.Repository}}:{{.Tag}}" | grep "docfast-docfast:rollback-" | head -n1 | tr -s ' ' | cut -d' ' -f1)
              if [ ! -z "$ROLLBACK_IMAGE" ]; then
                echo "🔄 Rolling back to $ROLLBACK_IMAGE"
                docker tag $ROLLBACK_IMAGE docfast-docfast:latest
                docker compose up -d
                
                # Wait for rollback to be healthy
                sleep 10
                if curl -f -s http://127.0.0.1:3100/health > /dev/null; then
                  echo "✅ Rollback successful"
                else
                  echo "❌ Rollback failed - manual intervention required"
                fi
              else
                echo "❌ No rollback image available"
              fi
              
              exit 1
            fi
            echo "⏳ Attempt $i/30 - waiting 5 seconds..."
            sleep 5
          done
          
          # Cleanup old rollback images (keep last 5)
          echo "🧹 Cleaning up old rollback images..."
          docker images --format "table {{.Repository}}:{{.Tag}}" | grep "docfast-docfast:rollback-" | tail -n +6 | awk '{print $1":"$2}' | xargs -r docker rmi || true
          
          # Final health check and status
          echo "🔍 Final health check..."
          HEALTH_STATUS=$(curl -f -s http://127.0.0.1:3100/health || echo "UNHEALTHY")
          echo "Health status: $HEALTH_STATUS"
          
          echo "📊 Service status:"
          docker compose ps
          
          echo "🎉 Deployment completed successfully!"