# All files / services log.controller.ts

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     import Router from '@koa/router';
    import { logService, LogLevel } from '../services/log.service';
    import { requestLogger } from '../services/requestLogger';
    import { Context } from 'koa';

    const router = new Router();

    // 获取请求日志列表
    router.get('/logs', async (ctx: Context) => {
      const { level, path, status, startTime, endTime, limit = 100, offset = 0 } = ctx.query;

      const filter: any = {};

      if (level && Object.values(LogLevel).includes(level as LogLevel)) {
        filter.level = level;
      }
      if (path) {
        filter.path = path as string;
      }
      if (status) {
        filter.status = parseInt(status as string, 10);
      }
      if (startTime) {
        filter.startTime = new Date(startTime as string);
      }
      if (endTime) {
        filter.endTime = new Date(endTime as string);
      }

      const logs = logService.getLogs(filter);
      const total = logs.length;
      const paginatedLogs = logs.slice(Number(offset), Number(offset) + Number(limit));

      ctx.body = {
        code: 0,
        message: 'success',
        data: {
          logs: paginatedLogs,
          total,
          limit: Number(limit),
          offset: Number(offset)
        }
      };
    });

    // 获取错误日志
    router.get('/logs/errors', async (ctx: Context) => {
      const { limit = 50 } = ctx.query;
      const errors = logService.getRecentErrors(Number(limit));

      ctx.body = {
        code: 0,
        message: 'success',
        data: {
          errors,
          count: errors.length
        }
      };
    });

    // 获取错误分析
    router.get('/logs/errors/analyze', async (ctx: Context) => {
      const analyses = logService.analyzeErrors();

      ctx.body = {
        code: 0,
        message: 'success',
        data: {
          analyses,
          total: analyses.length
        }
      };
    });

    // 获取最新错误详情
    router.get('/logs/errors/latest', async (ctx: Context) => {
      const errors = logService.getRecentErrors(1);

      ctx.body = {
        code: 0,
        message: 'success',
        data: {
          error: errors.length > 0 ? errors[0] : null
        }
      };
    });

    // 自动分析单条错误并提供修复建议
    router.post('/logs/auto-fix', async (ctx: Context) => {
      const { error, path, method } = ctx.request.body as any;

      if (!error) {
        ctx.status = 400;
        ctx.body = {
          code: 400,
          message: '缺少错误信息',
          data: null
        };
        return;
      }

      // 创建临时日志对象用于分析
      const tempLog = {
        error,
        path: path || 'unknown',
        timestamp: new Date()
      } as any;

      const suggestions = logService.autoAnalyzeError(tempLog);

      ctx.body = {
        code: 0,
        message: 'success',
        data: {
          error,
          suggestions,
          path,
          method
        }
      };
    });

    // 执行自动修复（模拟）
    router.post('/logs/fix/:errorId', async (ctx: Context) => {
      const { errorId } = ctx.params;

      // 这里可以根据errorId执行不同的修复操作
      // 目前是模拟实现
      const fixResults: Record<string, any> = {
        'DB_CONNECTION': {
          success: true,
          action: 'restart_database_connection',
          message: '已重新初始化数据库连接池'
        },
        'JSON_PARSE': {
          success: true,
          action: 'validate_request_body',
          message: '已添加请求体验证中间件'
        },
        'VALIDATION': {
          success: true,
          action: 'sanitize_parameters',
          message: '已添加参数清理逻辑'
        },
        'FILE_NOT_FOUND': {
          success: true,
          action: 'create_default_file',
          message: '已创建默认文件'
        },
        'PERMISSION': {
          success: true,
          action: 'refresh_token',
          message: '已刷新用户权限'
        },
        'TIMEOUT': {
          success: true,
          action: 'increase_timeout',
          message: '已增加超时时间'
        }
      };

      const result = fixResults[errorId] || {
        success: false,
        action: 'unknown',
        message: '未知的错误类型，无法自动修复'
      };

      ctx.body = {
        code: 0,
        message: 'success',
        data: result
      };
    });

    // 获取统计数据
    router.get('/logs/stats', async (ctx: Context) => {
      const stats = logService.getStats();

      ctx.body = {
        code: 0,
        message: 'success',
        data: stats
      };
    });

    // 清除日志
    router.delete('/logs', async (ctx: Context) => {
      const { olderThanHours } = ctx.query;

      const removed = logService.clearLogs(
        olderThanHours ? parseInt(olderThanHours as string, 10) : undefined
      );

      ctx.body = {
        code: 0,
        message: 'success',
        data: {
          removed,
          remaining: logService.getLogs().length
        }
      };
    });

    // 测试接口 - 故意产生错误用于测试
    router.post('/logs/test-error', async (ctx: Context) => {
      const { type = 'TEST' } = ctx.request.body as any;

      if (type === 'DB_CONNECTION') {
        throw new Error('ECONNREFUSED: Connection refused');
      } else if (type === 'JSON_PARSE') {
        throw new Error('JSON.parse: Unexpected token at position 0');
      } else if (type === 'VALIDATION') {
        ctx.status = 400;
        ctx.body = {
          code: 400,
          message: 'validation failed: field "name" is required'
        };
        return;
      } else if (type === 'FILE_NOT_FOUND') {
        throw new Error('ENOENT: no such file or directory \'uploads/test.txt\'');
      } else if (type === 'PERMISSION') {
        throw new Error('EACCES: permission denied');
      } else if (type === 'TIMEOUT') {
        throw new Error('ETIMEDOUT: connection timeout after 30000ms');
      }

      ctx.body = {
        code: 0,
        message: '测试错误已记录'
      };
    });

    export default router;