import { spawn } from 'child_process';
import { fileURLToPath } from 'url';
import { dirname, join } from 'path';
import fs from 'fs';
import os from 'os';
import dotenv from 'dotenv';
import chalk from 'chalk';

// 获取当前文件的目录路径
const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);

// 加载环境变量
dotenv.config({ path: join(dirname(__dirname), '.env') });

// 日志配置
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}`)),
  // 新增一个专门用于子进程输出的 logger
  subprocess: (message) => console.log(chalk.gray(`[ProxyBinary] ${message}`)),
};

class ProxyServer {
  constructor() {
    this.proxyProcess = null;
    this.platform = process.env.PROXY_SERVER_PLATFORM || 'auto';
    this.port = process.env.PROXY_SERVER_PORT || 10655;
    // ***【修改 1】*** 移除了 this.logPath 和 this.logStream
    this.enabled = process.env.ENABLE_PROXY_SERVER === 'true';
    this.proxyAuthToken = process.env.PROXY_AUTH_TOKEN || 'default_token';
  }

  // 获取当前系统平台 (无变化)
  detectPlatform() {
    if (this.platform !== 'auto') {
      return this.platform;
    }
    const platform = os.platform();
    const arch = os.arch();
    if (platform === 'win32') return 'windows';
    if (platform === 'linux') return (arch === 'arm64' ? 'android' : 'linux');
    if (platform === 'android') return 'android';
    logger.warning(`未知平台: ${platform}, ${arch}, 默认使用linux版本`);
    return 'linux';
  }

  // 获取代理服务器可执行文件路径 (无变化)
  getProxyServerPath() {
    const platform = this.detectPlatform();
    const isProduction = process.env.NODE_ENV === 'production';
    const proxyDir = isProduction ? '/tmp/proxy' : join(__dirname, 'proxy');
    logger.info(`环境: ${isProduction ? 'Production' : 'Development'}, 代理二进制目录: ${proxyDir}`);

    switch (platform) {
      case 'windows': return join(proxyDir, 'chrome_proxy_server_windows_amd64.exe');
      case 'linux': return join(proxyDir, 'chrome_proxy_server_linux_amd64');
      case 'android': return join(proxyDir, 'chrome_proxy_server_android_arm64');
      default:
        logger.error(`不支持的平台: ${platform}`);
        return null;
    }
  }

  // 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;
    }
    if (this.proxyProcess) {
      logger.warning('代理服务器已经在运行中');
      return;
    }

    const proxyServerPath = this.getProxyServerPath();
    if (!proxyServerPath || !fs.existsSync(proxyServerPath)) {
      logger.error(`代理二进制文件不存在于路径: ${proxyServerPath || '未知'}`);
      return;
    }
    
    try {
      // ***【修改 2】*** 移除了所有与文件日志相关的代码
      
      // 启动代理服务器进程
      this.proxyProcess = spawn(proxyServerPath, [
        '--port', this.port.toString(),
        '--token', this.proxyAuthToken
      ], {
        stdio: ['ignore', 'pipe', 'pipe'],
        detached: false
      });

      // ***【修改 3】*** 将子进程的输出直接打印到控制台
      if (this.proxyProcess.stdout) {
        this.proxyProcess.stdout.on('data', (data) => {
          logger.subprocess(data.toString().trim());
        });
      }
      if (this.proxyProcess.stderr) {
        this.proxyProcess.stderr.on('data', (data) => {
          logger.error(`[ProxyBinary-Error] ${data.toString().trim()}`);
        });
      }

      this.proxyProcess.on('error', (err) => {
        logger.error(`代理服务器启动失败: ${err.message}`);
        this.proxyProcess = null;
      });
      this.proxyProcess.on('exit', (code, signal) => {
        logger.info(`代理服务器已退出，退出码: ${code}, 信号: ${signal}`);
        this.proxyProcess = null;
      });

      await new Promise(resolve => setTimeout(resolve, 1000));
      
      if (this.proxyProcess && this.proxyProcess.exitCode === null) {
        logger.success(`代理服务器已启动，端口: ${this.port}`);
        return true;
      } else {
        logger.error('代理服务器启动失败或立即退出。');
        return false;
      }
    } catch (error) {
      logger.error(`启动代理服务器时出错: ${error.message}`);
      return false;
    }
  }

  // 停止代理服务器 (无变化)
  stop() {
    if (!this.proxyProcess) return;
    try {
      if (this.detectPlatform() === 'windows' && this.proxyProcess.pid) {
        spawn('taskkill', ['/pid', this.proxyProcess.pid, '/f', '/t']);
      } else {
        this.proxyProcess.kill('SIGTERM');
      }
      logger.success('代理服务器已停止');
    } catch (error) {
      logger.error(`停止代理服务器时出错: ${error.message}`);
    } finally {
      this.proxyProcess = null;
    }
  }
}

// 创建单例
const proxyServer = new ProxyServer();

// 导出
export { proxyServer };