pipeline {
  agent any

  tools { 
    nodejs 'Node'   // Jenkins -> Global Tool Config -> NodeJS must be named "Node"
  }

  environment {
    WEB_IP = '13.49.223.142'     // update if EC2 IP changes
    SSH_CRED = 'deploy-ec2-key'  // Jenkins credential ID for your EC2 SSH key
    NODE_OPTIONS = "--max_old_space_size=512"  // prevent Node from eating all memory
  }

  stages {
    stage('Checkout') { 
      steps { 
        checkout scm 
      } 
    }

    stage('Install') { 
      steps { 
        sh '''
          echo "📦 Installing dependencies..."
          npm install
        '''
      } 
    }

    stage('Build') { 
      steps { 
        sh '''
          echo "🏗️  Building project..."
          npm run build
        '''
      } 
    }

    stage('Package') {
      steps {
        sh '''
          OUT_DIR="build"
          [ -d dist ] && OUT_DIR="dist"

          if [ ! -d "$OUT_DIR" ]; then
            echo "❌ ERROR: No build output found (build/ or dist/)"
            ls -la
            exit 1
          fi

          echo "📦 Packaging build output..."
          tar -czf build.tar.gz -C "$OUT_DIR" .
        '''
        archiveArtifacts artifacts: 'build.tar.gz'
      }
    }

    stage('Deploy') {
      steps {
        sshagent(credentials: [env.SSH_CRED]) {
          sh '''
            echo "🚀 Deploying to ${WEB_IP} ..."
            scp -o StrictHostKeyChecking=no build.tar.gz deploy@${WEB_IP}:/tmp/build.tar.gz

            ssh -o StrictHostKeyChecking=no deploy@${WEB_IP} '
              sudo rm -rf /var/www/reactapp/*;
              sudo mkdir -p /var/www/reactapp;
              sudo tar -xzf /tmp/build.tar.gz -C /var/www/reactapp;
              sudo systemctl reload nginx
            '

            echo "✅ Deployment finished"
          '''
        }
      }
    }
  }

  post {
    success { echo "✅ Pipeline completed successfully" }
    failure { echo "❌ Pipeline failed — check console log" }
  }
}