import { adminMenus } from '@/api/system/menu';
import { constantRouterComponents, constantRouterIcon } from './constantRouterComponents';
import router from '@/router/index';
import { constantRouter } from '@/router/index';
import { RouteRecordRaw } from 'vue-router';

/**
 * 格式化 后端 结构信息并递归生成层级路由表
 *
 * @param routerMap
 * @param parent
 * @returns {*}
 */
export const routerGenerator = (routerMap, parent?): any[] => {
  return routerMap.map((item) => {
    const currentRouter: any = {
      // 路由地址 动态拼接生成如 /dashboard/workplace
      path: `${(parent && parent.path) || ''}/${item.path}`,
      // 路由名称，建议唯一
      name: item.name || '',
      // 该路由对应页面的 组件
      component: constantRouterComponents[item.component],
      // meta: 页面标题, 菜单图标, 页面权限(供指令权限用，可去掉)
      meta: {
        ...item.meta,
        label: item.meta.title,
        icon: constantRouterIcon[item.meta.icon] || null,
        permission: item.meta.permission || null,
      },
    };
    // 为了防止出现后端返回结果不规范，处理有可能出现拼接出两个 反斜杠
    currentRouter.path = currentRouter.path.replace('//', '/');
    // 重定向
    item.redirect && (currentRouter.redirect = item.redirect);
    // 是否有子菜单，并递归处理
    if (item.children && item.children.length > 0) {
      // Recursion
      currentRouter.children = routerGenerator(item.children, currentRouter);
    }
    return currentRouter;
  });
};

/**
 * 动态生成菜单
 * @param token
 * @returns {Promise<Router>}
 */
export const generatorDynamicRouter = (): Promise<RouteRecordRaw[]> => {
  return new Promise((resolve, reject) => {
    adminMenus()
      .then((result) => {
        const routeList = routerGenerator(result);
        const asyncRoutesList = [...constantRouter, ...routeList];
        asyncRoutesList.forEach((item) => {
          router.addRoute(item);
        });
        resolve(asyncRoutesList);
      })
      .catch((err) => {
        reject(err);
      });
  });
};