import dayjs from 'dayjs';

export type LogTabKey = 'login-log' | 'operate-log' | 'api-access-log' | 'api-error-log';

export interface LogTabOption {
  name: LogTabKey;
  label: string;
  description: string;
  queryPermission: string;
  exportPermission: string;
}

export interface LogDetailField {
  label: string;
  key?: string;
  span?: number;
  type?: 'text' | 'datetime' | 'dict' | 'multiline';
  dictCode?: string;
  formatter?: (detail: Record<string, unknown>) => string;
}

export interface LogDetailSection {
  title: string;
  fields: LogDetailField[];
}

export const LogPermission = {
  LoginQuery: 'system:login-log:query',
  LoginExport: 'system:login-log:export',
  OperateQuery: 'system:operate-log:query',
  OperateExport: 'system:operate-log:export',
  ApiAccessQuery: 'system:api-access-log:query',
  ApiAccessExport: 'system:api-access-log:export',
  ApiErrorQuery: 'system:api-error-log:query',
  ApiErrorExport: 'system:api-error-log:export'
} as const;

export const LOG_TABS: LogTabOption[] = [
  {
    name: 'login-log',
    label: '登录日志',
    description: '查看系统登录行为、登录结果与登录时间。',
    queryPermission: LogPermission.LoginQuery,
    exportPermission: LogPermission.LoginExport
  },
  {
    name: 'operate-log',
    label: '操作日志',
    description: '查看系统操作轨迹、请求地址与业务编号。',
    queryPermission: LogPermission.OperateQuery,
    exportPermission: LogPermission.OperateExport
  },
  {
    name: 'api-access-log',
    label: 'API访问日志',
    description: '查看接口访问结果、执行时长与请求链路。',
    queryPermission: LogPermission.ApiAccessQuery,
    exportPermission: LogPermission.ApiAccessExport
  },
  {
    name: 'api-error-log',
    label: 'API错误日志',
    description: '查看接口异常、处理状态与错误上下文。',
    queryPermission: LogPermission.ApiErrorQuery,
    exportPermission: LogPermission.ApiErrorExport
  }
];

export function formatDateTime(value?: string | null) {
  if (!value) return '--';

  const target = dayjs(value);
  return target.isValid() ? target.format('YYYY-MM-DD HH:mm:ss') : value;
}

export function formatText(value: unknown) {
  if (value === null || value === undefined || value === '') return '--';
  return String(value);
}

export function formatDuration(value: unknown) {
  if (value === null || value === undefined || value === '') return '--';

  const duration = Number(value);
  return Number.isFinite(duration) ? `${duration} ms` : String(value);
}

export function formatMultilineText(value: unknown) {
  if (value === null || value === undefined || value === '') return '--';

  const text = String(value);
  const normalized = text.trim();

  if (!normalized) return '--';

  if (
    (normalized.startsWith('{') && normalized.endsWith('}')) ||
    (normalized.startsWith('[') && normalized.endsWith(']'))
  ) {
    try {
      return JSON.stringify(JSON.parse(normalized), null, 2);
    } catch {
      return text;
    }
  }

  return text;
}

export function downloadBlob(blob: Blob, fileName: string) {
  const url = URL.createObjectURL(blob);
  const link = document.createElement('a');

  link.href = url;
  link.download = fileName;
  link.click();

  URL.revokeObjectURL(url);
}

export function getLogExportFileName(label: string) {
  return `${label}_${dayjs().format('YYYY-MM-DD')}.xls`;
}