pipeline {
  agent any

  tools { 
    nodejs 'Node'   // Name of your NodeJS installation in Jenkins
  }

  environment {
    WEB_IP = '13.49.223.142'     // EC2 Web server IP
    SSH_CRED = 'deploy-ec2-key'  // Jenkins credential ID for SSH key
    NODE_OPTIONS = "--max_old_space_size=512"  // Limit Node memory
  }

  options {
    ansiColor('xterm')            // Colorized console logs
    timestamps()                  // Show timestamps in console
    timeout(time: 30, unit: 'MINUTES') // Fail build if it hangs
  }

  stages {
    stage('Checkout') { 
      steps { 
        echo "🔄 Checking out code..."
        checkout scm 
      } 
    }

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

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

    stage('Package Build') {
      steps {
        script {
          def outDir = fileExists('dist') ? 'dist' : 'build'
          if (!fileExists(outDir)) {
            error "❌ Build output not found in 'build/' or 'dist/'!"
          }
          echo "📦 Packaging build output..."
          sh "tar -czf build.tar.gz -C ${outDir} ."
          archiveArtifacts artifacts: 'build.tar.gz'
        }
      }
    }

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