import { constantRoutes } from "@/router";
import { getRouters } from "@/api/menu";
import Layout from "@/layout/index";
import ParentView from "@/components/ParentView";
import api from "@/api/api";
import InnerLink from "@/layout/components/InnerLink";

const permission = {
  state: {
    routes: [],
    addRoutes: [],
    defaultRoutes: [],
    topbarRouters: [],
    sidebarRouters: [],
    dictManages: {}, //字典数据
  },
  getters: {
    dictManages: (state) => state.dictManages,
  },
  mutations: {
    SET_ROUTES: (state, routes) => {
      state.addRoutes = routes;
      state.routes = constantRoutes.concat(routes);
    },
    GET_DICT_INFO(state) {
      // api.obtaindictdata().then((res) => {
      //   let newList = {};
      //   let list = res.rows || [];
      //   for (let i = 0; i < list.length; i++) {
      //     let item = list[i];
      //     if (newList.hasOwnProperty(item.dictType)) {
      //       newList[item.dictType].push(item.dictLabel);
      //     } else {
      //       newList[item.dictType] = [item.dictLabel];
      //     }
      //   }
      //   state.dictManages = newList;
      // });
    },
    SET_DEFAULT_ROUTES: (state, routes) => {
      state.defaultRoutes = constantRoutes.concat(routes);
    },
    SET_TOPBAR_ROUTES: (state, routes) => {
      // 顶部导航菜单默认添加统计报表栏指向首页
      const index = [
        {
          path: "index",
          meta: { title: "工作台", icon: "dashboard" },
        },
      ];
      let ary = [];
      state.topbarRouters = ary.concat(index, routes);
    },
    SET_SIDEBAR_ROUTERS: (state, routes) => {
      state.sidebarRouters = routes;
    },
  },
  actions: {
    // 生成路由
    GenerateRoutes({ commit }) {
      return new Promise((resolve) => {
        // 向后端请求路由数据
        getRouters().then((res) => {
          res.data.forEach((item, i) => {
            if (!item.children) {
              res.data[i] = {
                meta: "",
                path: "",
                redirect: "/redirect",
                component: "Layout",
                alwaysShow: false,
                children: [
                  {
                    name: item.name,
                    path: item.path.substr(0),
                    component: item.component,
                    hidden: false,
                    noChildren: true,
                    meta: item.meta,
                  },
                ],
              };
            }
          });
          const sdata = JSON.parse(JSON.stringify(res.data));
          const rdata = JSON.parse(JSON.stringify(res.data));
          const sidebarRoutes = filterAsyncRouter(sdata);
          const rewriteRoutes = filterAsyncRouter(rdata, false, true);
          commit("SET_ROUTES", rewriteRoutes);
          commit("SET_SIDEBAR_ROUTERS", constantRoutes.concat(sidebarRoutes));
          commit("SET_DEFAULT_ROUTES", sidebarRoutes);
          commit("SET_TOPBAR_ROUTES", sidebarRoutes);
          commit("GET_DICT_INFO");
          resolve(rewriteRoutes);
        });
      });
    },
  },
};

// 遍历后台传来的路由字符串，转换为组件对象
function filterAsyncRouter(asyncRouterMap, lastRouter = false, type = false) {
  return asyncRouterMap.filter((route) => {
    if (type && route.children) {
      route.children = filterChildren(route.children);
    }
    if (route.component) {
      // Layout ParentView 组件特殊处理
      if (route.component === "Layout") {
        route.component = Layout;
      } else if (route.component === "ParentView") {
        route.component = ParentView;
      } else if (route.component === "InnerLink") {
        route.component = InnerLink;
      } else {
        route.component = loadView(route.component);
      }
    }
    if (route.children != null && route.children && route.children.length) {
      route.children = filterAsyncRouter(route.children, route, type);
    } else {
      delete route["children"];
      delete route["redirect"];
    }
    return true;
  });
}

function filterChildren(childrenMap, lastRouter = false) {
  var children = [];
  childrenMap.forEach((el, index) => {
    if (el.children && el.children.length) {
      if (el.component === "ParentView" && !lastRouter) {
        el.children.forEach((c) => {
          c.path = el.path + "/" + c.path;
          if (c.children && c.children.length) {
            children = children.concat(filterChildren(c.children, c));
            return;
          }
          children.push(c);
        });
        return;
      }
    }
    if (lastRouter) {
      el.path = lastRouter.path + "/" + el.path;
    }
    children = children.concat(el);
  });
  return children;
}

export const loadView = (view) => {
  if (process.env.NODE_ENV === "development") {
    return (resolve) => require([`@/views/${view}`], resolve);
  } else {
    // 使用 import 实现生产环境的路由懒加载
    return (resolve) => require([`@/views/${view}`], resolve);
  }
};

export default permission;