import { HttpsProxyAgent } from 'https-proxy-agent';
import { SocksProxyAgent } from 'socks-proxy-agent';
import type { ProxyConfig } from './types.js';
import { validateProxyConfig } from './types.js';

export class ProxyManager {
  /**
   * Create appropriate proxy agent based on configuration
   */
  static createAgent(proxy: ProxyConfig): HttpsProxyAgent<string> | SocksProxyAgent {
    const { type, host, port, username, password } = proxy;

    let proxyUrl: string;
    
    if (username && password) {
      proxyUrl = `${type}://${encodeURIComponent(username)}:${encodeURIComponent(password)}@${host}:${port}`;
    } else {
      proxyUrl = `${type}://${host}:${port}`;
    }

    switch (type) {
      case 'http':
      case 'https':
        return new HttpsProxyAgent(proxyUrl);
      case 'socks4':
      case 'socks5':
        return new SocksProxyAgent(proxyUrl);
      default:
        throw new Error(`Unsupported proxy type: ${type}`);
    }
  }
  /**
   * Validate proxy configuration
   */
  static validateConfig(proxy: ProxyConfig): void {
    // Use the centralized validation function
    validateProxyConfig(proxy);
  }
}