// 统一响应格式
class ApiResponse {
  static success(data, message = 'success') {
    return {
      success: true,
      message,
      data,
      timestamp: new Date().toISOString()
    };
  }

  static error(message = 'error', code = 500) {
    return {
      success: false,
      message,
      code,
      timestamp: new Date().toISOString()
    };
  }

  static paginate(data, page, pageSize, total) {
    return {
      success: true,
      data,
      pagination: {
        page,
        pageSize,
        total,
        totalPages: Math.ceil(total / pageSize)
      },
      timestamp: new Date().toISOString()
    };
  }
}

module.exports = ApiResponse;