import dotenv from 'dotenv';
import chalk from 'chalk';
import { fileURLToPath } from 'url';
import { dirname, join } from 'path';

const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);

dotenv.config({ path: join(dirname(__dirname), '.env') });

const logger = {
  info: (message) => console.log(chalk.blue(`[ProxyServer] ${message}`)),
  error: (message) => console.error(chalk.red(`[ProxyServer] ${message}`)),
  warning: (message) => console.warn(chalk.yellow(`[ProxyServer] ${message}`)),
  success: (message) => console.log(chalk.green(`[ProxyServer] ${message}`)),
};

/**
 * 简化的代理服务器管理类
 */
class ProxyServer {
  constructor() {
    this.enabled = process.env.ENABLE_PROXY_SERVER === 'true';
    this.proxyUrl = process.env.HTTP_PROXY || process.env.HTTPS_PROXY || '';
    this.isConnected = false;
  }

  /**
   * 启动代理服务器
   */
  async start() {
    if (!this.enabled) {
      logger.info('代理服务器未启用，跳过启动');
      return false;
    }

    if (!this.proxyUrl) {
      logger.warning('未设置代理URL (HTTP_PROXY)，跳过代理验证');
      return false;
    }

    logger.info('正在验证代理连接...');
    
    try {
      const isValid = await this.validateProxyConnection();
      
      if (isValid) {
        this.isConnected = true;
        logger.success('代理服务连接成功');
        return true;
      } else {
        logger.error('代理服务连接失败');
        return false;
      }
    } catch (error) {
      logger.error(`连接代理服务时出错: ${error.message}`);
      return false;
    }
  }

  /**
   * 验证代理连接
   */
  async validateProxyConnection() {
    try {
      // 修复导入方式
      const HttpProxyAgent = (await import('http-proxy-agent')).default;
      const fetch = (await import('node-fetch')).default;
      
      const agent = new HttpProxyAgent(this.proxyUrl);
      
      const response = await fetch('https://httpbin.org/ip', {
        agent,
        timeout: 10000
      });
      
      if (response.ok) {
        const data = await response.json();
        logger.info(`代理连接测试成功，出口IP: ${data.origin}`);
        return true;
      } else {
        logger.error(`代理连接测试失败，状态码: ${response.status}`);
        return false;
      }
    } catch (error) {
      logger.error(`代理连接验证失败: ${error.message}`);
      return false;
    }
  }

  /**
   * 停止代理服务器
   */
  stop() {
    this.isConnected = false;
    logger.success('代理服务已断开');
  }

  /**
   * 获取代理状态
   */
  getStatus() {
    return {
      enabled: this.enabled,
      connected: this.isConnected,
      proxyConfigured: !!this.proxyUrl
    };
  }
}

const proxyServer = new ProxyServer();

export { proxyServer };