const express = require('express');
const app = express();
const port = process.env.PORT || 3000;

// 基本的Hello World路由
app.get('/', (req, res) => {
  res.json({
    message: 'Hello World from Node.js Docker! 🎉',
    timestamp: new Date().toISOString(),
    version: '1.0.0'
  });
});

// 健康检查路由
app.get('/health', (req, res) => {
  res.json({
    status: 'healthy',
    uptime: process.uptime(),
    timestamp: new Date().toISOString()
  });
});

// 启动服务器
app.listen(port, '0.0.0.0', () => {
  console.log(`🚀 Hello World 应用启动成功！`);
  console.log(`📡 服务器运行在 http://0.0.0.0:${port}`);
  console.log(`🎯 访问 http://localhost:${port} 查看Hello World`);
  console.log(`💚 访问 http://localhost:${port}/health 查看健康状态`);
});

// 优雅关闭
process.on('SIGTERM', () => {
  console.log('📴 收到SIGTERM信号，正在关闭服务器...');
  process.exit(0);
});

process.on('SIGINT', () => {
  console.log('📴 收到SIGINT信号，正在关闭服务器...');
  process.exit(0);
});