import { getMenus } from '@/api/system/menu'
import { constantRouterIcon } from './router-icons'
import { RouteRecordRaw } from 'vue-router'
import { asyncRoutes } from '@/router/constant'
import { BaseRoute } from '@/router/base'
import type { AppRouteRecordRaw } from '@/router/types'
import deepClone from '@/utils/deep.clone'
import CourseKnowledgePoint from '@/views/teaching-manage/courseware-manage/model/CourseKnowledgePoint'
import { PageEnum } from '@/enums/pageEnum'

const Iframe = () => import('@/views/iframe/index.vue')
const LayoutMap = new Map<string, () => Promise<typeof import('*.vue')>>()

LayoutMap.set('LAYOUT', asyncRoutes.Layout)
LayoutMap.set('IFRAME', Iframe)

/**
 * 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: any, parent?: any): any[] => {
  const asyncRoute: any = asyncRoutes
  const constantRouterI: any = constantRouterIcon
  return routerMap.map((item: any) => {
    if (item.type === 1) {
      return
    }

    const currentRouter: any = {
      // 路由地址 动态拼接生成如 /dashboard/workplace
      path:
        item.path.indexOf('/') > -1 ? item.path : `${(parent && parent.path) || ''}/${item.path}`,
      // 路由名称，建议唯一
      name: item.path || '',
      // 该路由对应页面的 组件
      component: asyncRoute[item.component],
      // meta: 页面标题, 菜单图标, 页面权限(供指令权限用，可去掉)
      show: item.hidden === 0 ? true : false,
      parent: item.parent,
      meta: {
        ...item.meta,
        label: item.name,
        title: item.name,
        id: item.id,
        icon: constantRouterI[item.icon] || null,
        parentPermission: item.parentPermission || null
        // permissions: item.meta.permissions || null,
      },
      props: true
    }
    // console.log(item.name, '格式化路由')

    // 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) {
      //如果未定义 redirect 默认第一个子路由为 redirect
      // !item.redirect && (currentRouter.redirect = `${item.path}/${item.children[0].path}`)
      // Recursion
      currentRouter.children = routerGenerator(item.children, currentRouter)
    }
    return currentRouter
  })
}

// 格式化路由
export const routerFormat = (routerMap: any) => {
  const newArr: any[] = []
  for (let i = 0; i < routerMap.length; i++) {
    if (routerMap[i].type == 1) {
      continue
    }
    const { children, ...res } = routerMap[i]
    const currentRouter: any = {
      ...res
    }
    // 是否有子菜单，并递归处理
    if (children && children.length > 0) {
      const tempChildren = routerFormat(children)
      // console.log(children, 'children', tempChildren)
      currentRouter.children = tempChildren
    }
    // console.log(currentRouter, 'currentRouter')
    newArr.push(currentRouter)
  }
  return newArr
}

// 格式化菜单
export const menuFormat = (menuMap: any, parent?: any) => {
  const newArr: any[] = []
  for (let i = 0; i < menuMap.length; i++) {
    if (menuMap[i].type == 1) {
      continue
    }
    const { children, ...res } = menuMap[i]
    const currentRouter: any = {
      ...res,
      parent: parent ? parent.name : null
    }

    // 是否有子菜单，并递归处理
    if (children && children.length > 0) {
      // let flag = false;
      children.forEach((item: any) => {
        if (item.type == 0 && !item.hidden) {
          item.children = null
        }
      })
      const tempChildren = menuFormat(children, currentRouter)
      currentRouter.children = tempChildren
    }
    newArr.push(currentRouter)
  }
  return newArr
}
/**
 * 路由多级嵌套数组处理成一维数组
 * @param arr 传入路由菜单数据数组
 * @returns 返回处理后的一维路由菜单数组
 */
export function formatFlatteningRoutes(arr: any) {
  if (arr.length <= 0) return false
  for (let i = 0; i < arr.length; i++) {
    if (arr[i].children) {
      arr = arr.slice(0, i + 1).concat(arr[i].children, arr.slice(i + 1))
    }
  }
  return arr
}

function getFirstMenu(routes: any) {
  // 可能没有权限  提示管理
  if (routes && routes.length > 0) {
    let firstMenu: any = null
    routes.forEach((item: any) => {
      // 判断是否有首页菜单
      if (!firstMenu) {
        if (item.children?.length > 0 && !item.hidden) {
          firstMenu = pathErgodic(item)
        }
      }
    })
    if (checkPathUrl(firstMenu)) {
      return firstMenu
    } else {
      return '/' + firstMenu
    }
  }
}

function pathErgodic(item: any) {
  // console.log(item)
  let firstMenu: any = null
  item.children.forEach((i: any) => {
    if (!firstMenu && i.children?.length > 0 && !i.hidden) {
      let isChildrenList = false
      i.children.forEach((ii: any) => {
        if (!ii.hidden && ii.type) {
          isChildrenList = true
        }
      })
      if (isChildrenList) {
        firstMenu = pathErgodic(i)
      } else {
        if (!firstMenu && checkPathUrl(i.path)) {
          firstMenu = i.path
        } else {
          if (!firstMenu && !i.hidden) {
            firstMenu = item.path + '/' + i.path
          }
        }
      }
    } else {
      if (!firstMenu && checkPathUrl(i.path)) {
        firstMenu = i.path
      } else {
        if (!firstMenu && !i.hidden) {
          firstMenu = item.path + '/' + i.path
        }
      }
    }
  })
  return firstMenu
}

// 判断path有没有带/,并且是第一个位置
function checkPathUrl(path: any) {
  return path.indexOf('/') === 0 ? true : false
}

let tempArr: Array<any> = []
/**
 * 动态生成菜单
 * @returns {Promise<Router>}
 */
export const generatorDynamicRouter = (): any => {
  return new Promise((resolve, reject) => {
    getMenus({ delFlag: false })
      .then((result) => {
        // 设置路由
        setAuthList(result.data)
        const t = menuFormat(deepClone(result.data))
        const routers = routerFormat(deepClone(result.data))
        // 讲多级路由转化1级路由
        // 格式化路由
        BaseRoute.children = formatFlatteningRoutes(routerGenerator(routers))
        const menu = routerGenerator(t)
        const firstMenu = getFirstMenu(routers)
        // console.log(firstMenu, 'firstMenu', BaseRoute)
        PageEnum.BASE_HOME = firstMenu
        // 同步 异步路由
        resolve({
          routes: BaseRoute,
          authList: tempArr,
          menu: menu
        })
      })
      .catch((err) => {
        reject(err)
      })
  })
}

/**
 * 设置所有的权限集合
 * @returns
 */
export const setAuthList = (arr: any) => {
  arr.map((item: any) => {
    tempArr.push(item.permission + item.id)
    if (item.children && item.children.length > 0) {
      setAuthList(item.children)
    }
  })
}

/**
 *
 * @param routes: any
 * @param component
 * @returns 格式化后带顶部的路由
 */
export function addTopMenu(routes: any) {
  if (routes.length > 0) {
    let newArr = []
    for (let i = 0; i < routes.length; i++) {
      if (routes[i].type == 1) {
        continue
      }
      let obj = routes[i]
      obj.belongTopMenu = obj.path
      if (routes[i].sysMenus && routes[i].sysMenus.length > 0) {
        obj.sysMenus = setTopMenu(routes[i].sysMenus, obj)
      }

      newArr.push(obj)
    }
    return newArr
  }
}

/**
 *
 * @param routes: any
 * @param 递归给每一层菜单附上一个  belongTopMenu
 * @returns
 */

export function setTopMenu(arr: any, topParentArr: any) {
  let newArr = []
  for (let i = 0; i < arr.length; i++) {
    let obj = arr[i]
    obj.belongTopMenu = topParentArr.path
    if (arr[i].sysMenus && arr[i].sysMenus.length > 0) {
      obj.sysMenus = setTopMenu(arr[i].sysMenus, topParentArr)
    }

    newArr.push(obj)
  }
  return newArr
}