/**
 * 日志记录模块
 * 负责应用日志记录和输出重定向
 */
const path = require('path');
const fs = require('fs');

/**
 * 设置应用日志系统
 * @param {string} userDataPath 用户数据目录路径
 * @returns {string} 日志文件路径
 */
function setupLogging(userDataPath) {
  const logPath = path.join(
    userDataPath,
    'logs',
    `app-${new Date().toISOString().replace(/:/g, '-')}.log`
  );
  
  // 确保日志目录存在
  const logDir = path.dirname(logPath);
  if (!fs.existsSync(logDir)) {
    fs.mkdirSync(logDir, { recursive: true });
  }
  
  console.log(`日志文件将保存在: ${logPath}`);
  
  // 创建日志文件写入流
  const logStream = fs.createWriteStream(logPath, { flags: 'a' });
  
  // 重定向console输出到文件
  const originalConsoleLog = console.log;
  const originalConsoleError = console.error;
  
  console.log = function(...args) {
    const message = args.map(arg => 
      typeof arg === 'object' ? JSON.stringify(arg) : arg
    ).join(' ');
    
    const timestamp = new Date().toISOString();
    const logMessage = `[${timestamp}] [INFO] ${message}\n`;
    
    logStream.write(logMessage);
    originalConsoleLog.apply(console, args);
  };
  
  console.error = function(...args) {
    const message = args.map(arg => 
      typeof arg === 'object' ? JSON.stringify(arg) : arg
    ).join(' ');
    
    const timestamp = new Date().toISOString();
    const logMessage = `[${timestamp}] [ERROR] ${message}\n`;
    
    logStream.write(logMessage);
    originalConsoleError.apply(console, args);
  };
  
  // 记录未捕获的异常
  process.on('uncaughtException', (error) => {
    console.error('未捕获的异常:', error);
  });
  
  process.on('unhandledRejection', (reason, promise) => {
    console.error('未处理的Promise拒绝:', reason);
  });
  
  return logPath;
}

module.exports = {
  setupLogging
};