/**
 * 日志管理工具
 * 解决微信小程序真机调试时的日志文件访问问题
 */

/**
 * 初始化日志文件系统
 * 在应用启动时调用，确保日志文件存在
 */
export function initLogFiles() {
  // #ifdef MP-WEIXIN
  try {
    const fs = wx.getFileSystemManager();
    const logDirPath = `${wx.env.USER_DATA_PATH}/miniprogramLog`;
    const logFiles = ['log1', 'log2', 'log3'];
    
    // 检查并创建日志文件的函数
    function checkAndCreateFiles() {
      logFiles.forEach(fileName => {
        const filePath = `${logDirPath}/${fileName}`;
        fs.access({
          path: filePath,
          success: () => {
            console.log(`Log file ${fileName} exists`);
          },
          fail: () => {
            console.log(`Log file ${fileName} does not exist, creating it`);
            fs.writeFile({
              filePath: filePath,
              data: '',
              success: () => {
                console.log(`Log file ${fileName} created successfully`);
              },
              fail: err => {
                console.error(`Failed to create log file ${fileName}`, err);
              }
            });
          }
        });
      });
    }
    
    // 创建目录
    fs.access({
      path: logDirPath,
      success: () => {
        console.log('Log directory exists');
        checkAndCreateFiles();
      },
      fail: () => {
        console.log('Log directory does not exist, creating it');
        fs.mkdir({
          dirPath: logDirPath,
          success: () => {
            console.log('Log directory created successfully');
            checkAndCreateFiles();
          },
          fail: err => {
            console.error('Failed to create log directory', err);
          }
        });
      }
    });
  } catch (error) {
    console.error('Failed to initialize log files:', error);
  }
  // #endif
}

/**
 * 安全的日志写入
 * @param {string} message - 日志消息
 * @param {string} level - 日志级别 (info, warn, error)
 */
export function writeLog(message, level = 'info') {
  // #ifdef MP-WEIXIN
  try {
    const fs = wx.getFileSystemManager();
    const logDirPath = `${wx.env.USER_DATA_PATH}/miniprogramLog`;
    const timestamp = new Date().toISOString();
    const logEntry = `[${timestamp}] [${level.toUpperCase()}] ${message}\n`;
    
    fs.appendFile({
      filePath: `${logDirPath}/log1`,
      data: logEntry,
      success: () => {
        // 日志写入成功
      },
      fail: err => {
        console.error('Failed to write log:', err);
      }
    });
  } catch (error) {
    console.error('Failed to write log:', error);
  }
  // #endif
}

/**
 * 清理旧日志文件
 */
export function cleanOldLogs() {
  // #ifdef MP-WEIXIN
  try {
    const fs = wx.getFileSystemManager();
    const logDirPath = `${wx.env.USER_DATA_PATH}/miniprogramLog`;
    
    fs.readdir({
      dirPath: logDirPath,
      success: (res) => {
        const files = res.files;
        const now = Date.now();
        const maxAge = 7 * 24 * 60 * 60 * 1000; // 7天
        
        files.forEach(fileName => {
          const filePath = `${logDirPath}/${fileName}`;
          fs.stat({
            path: filePath,
            success: (statRes) => {
              if (now - statRes.stats.lastAccessedTime > maxAge) {
                fs.unlink({
                  filePath: filePath,
                  success: () => {
                    console.log(`Deleted old log file: ${fileName}`);
                  },
                  fail: err => {
                    console.error(`Failed to delete old log file: ${fileName}`, err);
                  }
                });
              }
            }
          });
        });
      },
      fail: err => {
        console.error('Failed to read log directory:', err);
      }
    });
  } catch (error) {
    console.error('Failed to clean old logs:', error);
  }
  // #endif
}