使用typescript反应，定义环境模块

// 环境模块的定义
interface Environment {
  apiUrl: string;
  apiKey: string;
  logLevel: string;
}

// 开发环境配置
const development: Environment = {
  apiUrl: 'http://localhost:3000',
  apiKey: 'your-api-key',
  logLevel: 'debug'
};

// 测试环境配置
const testing: Environment = {
  apiUrl: 'http://test-server:3000',
  apiKey: 'test-api-key',
  logLevel: 'info'
};

// 生产环境配置
const production: Environment = {
  apiUrl: 'https://api.example.com',
  apiKey: 'production-api-key',
  logLevel: 'warn'
};

// 根据环境变量加载相应的配置
let environment: Environment;

if (process.env.NODE_ENV === 'development') {
  environment = development;
} else if (process.env.NODE_ENV === 'testing') {
  environment = testing;
} else {
  environment = production;
}

export default environment;