pipeline {
  agent any

  environment {
    APP_PORT = 6767
    PID_FILE = "${WORKSPACE}/app.pid"
  }
  
  stages {
    stage('Echo Version') {
      steps {
        sh 'echo Print Maven Version'
        sh 'mvn -version '
      }
    }

    stage('Build') {
      steps {
        sh 'mvn clean package -DskipTests=true'
        archiveArtifacts 'target/hello-demo-*.jar'
      }
    }

    stage('Unit Test') {
      steps {
        script {
          sh "mvn test"
        }

        junit(testResults: 'target/surefire-reports/TEST-*.xml', keepProperties: true, keepTestNames: true)
      }
    }
    stage('Start App') {
      steps {
        sh '''
          set -e

          if [ -f "$PID_FILE" ]; then
            kill "$(cat "$PID_FILE")" || true
            rm -f "$PID_FILE"
          fi

          echo "Starting JAR..."
          nohup java -jar target/hello-demo-*.jar \
            > app.log 2>&1 &

          echo $! > "$PID_FILE"
          echo "App started (PID: $(cat "$PID_FILE"))"
        '''
      }
    }

    stage('Integration Test') {
      steps {
        sh '''
          set -e

          echo "Waiting for app..."
          for i in {1..15}; do
            if curl -fs http://localhost:$APP_PORT/hello >/dev/null; then
              echo "Integration test passed"
              curl -s http://localhost:$APP_PORT/hello
              exit 0
            fi
            sleep 1
          done

          echo "Integration test failed"
          cat app.log || true
          exit 1
        '''
      }
    }
  }

  post {
    always {
      sh '''
        if [ -f "$PID_FILE" ]; then
          echo "Stopping application"
          kill "$(cat "$PID_FILE")" || true
          rm -f "$PID_FILE"
        fi
      '''
    }
  }
  tools {
    maven 'M398'
  }
}