import {
  asyncRoutes,
  constantRoutes
} from '@/router'
import Layout from '@/layout'
import {
  getAuthMenu
} from '@/api/user.js'
/**
 * Use meta.role to determine if the current user has permission
 * @param roles
 * @param route
 */
function hasPermission(roles, route) {
  if (route.meta && route.meta.roles) {
    return roles.some(role => route.meta.roles.includes(role))
  } else {
    return true
  }
}
/**
 * 静态路由懒加载
 * @param view  格式必须为 xxx/xxx 开头不要加斜杠
 * @returns
 */
export const loadView = (view) => {
  return (resolve) => require([`@/views${view}`], resolve);
}


/**
 * Filter asynchronous routing tables by recursion
 * @param routes asyncRoutes
 * @param roles
 */
export function filterAsyncRoutes(routes, roles) {
  const res = []

  routes.forEach(route => {
    const tmp = {
      ...route
    }
    if (hasPermission(roles, tmp)) {
      if (tmp.children) {
        tmp.children = filterAsyncRoutes(tmp.children, roles)
      }
      res.push(tmp)
    }
  })

  return res
}

const state = {
  routes: [],
  addRoutes: []
}

/**
 * 后台查询的菜单数据拼装成路由格式的数据
 * @param routes
 */
const pathHandler = (item) => {
  if(!item.path || item.path?.includes('#') || item.path == ''){
    return item.id + '_key'
  }
  if(/^\^/.test(item.path)){
    return item.path.replace(/^\^+/g,"")
  }
  if(/^\$/.test(item.path)){
    return item.path.replace(/^\$+/g,"")
  }
  return item.path
  // if(path.includes('$')){
  //   return path.replace(/^\$+/g,"")
  // }
  // if(path.includes('^')){
  //   return path.replace(/^\^+/g,"")
  // }
  // if(path.includes('#') || path == ''){
  //   return id + '_key'
  // }
  // return path
}
const componentHandler = (path) => {
  //return path === '#'|| path == ''  ? Layout : loadView(path)
  if(path === '#' || path === ''){
    return Layout
  }
  if(path.includes('#') && path !== '#'){
    return ()=>import('@/layout/noLayout')
  }
  return loadView(path)
}

// path为#,左边栏根目录无视图，##下级根目录无视图，$不显示在左边栏视图，^左边栏根目录有视图
export function generaMenu(routes, data) {
  data.forEach(item => {
    if (!item.path) {
      item.path = item.url
    }
    let params = {};
    if(item.path?.includes('?')){
      let flag = item.path.split('?')
      item.path = flag[0]
      if(flag[1]){
        let list = flag[1].split('&')
        list.forEach(item => {
          let kv = item.split('=')
          Object.defineProperty(params,kv[0],{
            value:kv[1],
            writable:true,
            enumerable:true,
            configurable:false
          })
        })
      }
    }
    if (item.url === "/") {

    } else if(/^\^/.test(item.path)){
      const menu = {
        name: item.children?.length > 1 ? 'menu_' + item.id : item.children[0]?.id,
        path:  pathHandler(item),
        component: Layout,
        meta: {
          title: item.children?.length > 1 ? item.name : item.children[0]?.name,
          id: item.children?.length > 1 ? item.id : item.children[0]?.id,
          roles: ['admin'],
          params,

          icon: item.children?.length > 1 ? item.icon : item.children[0]?.icon
        },
        children: []
      }
      if (item.children) {
        if (item.children.length > 1) {
          menu['redirect'] = `${pathHandler(item)}${item.children[0].path}`
          item.children.unshift({
            id: item.id,
            name: item.name,
            path: item.path.replace(/\^/g,""),
            url: item.url,
            icon: item.icon,
            children: [],
            hidden: true
          })
        } else {
          menu.children.push({
            path: "",
            name: 'menu_' + item.id,
            component: (item.url.includes('#')||item.path == '')  ? Layout : loadView(item.url),
            // component: Layout,
            meta: {
              title: item.name,
              id: item.id,
              roles: ['admin'],
              params,

              icon: item.icon
            }
          })
        }
        generaMenu(menu.children, item.children)
      }
      console.log(77, menu)
      routes.push(menu)
    } else {
      const menu = {
        path: pathHandler(item),
        //(item.path === '#'||item.path == '' ? item.id + '_key' : item.path),
        component: componentHandler(item.url),
        //(item.path === '#'||item.path == ''  ? Layout : loadView(item.path)),
        // hidden: true,
        children: [],
        name: 'menu_' + item.id,
        meta: {
          title: item.name,
          id: item.id,
          roles: ['admin'],
          auths:item.has_auth_node_tags,
          params,
          icon: item.icon
        },
        hidden: item.hidden
      }
      if(item.path?.includes("$")){
        menu.hidden = true
      }
      if (item.children) {
        generaMenu(menu.children, item.children)
      }
      routes.push(menu)
    }

  })
  // routes.push({
  //   path: '*',
  //   redirect: '/404',
  //   hidden: true
  // })
}

const mutations = {
  SET_ROUTES: (state, routes) => {
    state.addRoutes = routes
    state.routes = constantRoutes.concat(routes)
  }
}



// const actions = {
//   generateRoutes({
//     commit
//   }, roles) {
//     const loadMenuData = []
//     return new Promise(resolve => {
//       let accessedRoutes
//       let data = _routes2;
//       Object.assign(loadMenuData, data)
//       generaMenu(asyncRoutes, loadMenuData)
//       if (roles.includes('admin')) {
//         // alert(JSON.stringify(asyncRoutes))
//         accessedRoutes = asyncRoutes || []
//       } else {
//         accessedRoutes = filterAsyncRoutes(asyncRoutes, roles)
//       }
//       commit('SET_ROUTES', accessedRoutes)
//       resolve(accessedRoutes)
//     })
//   }
// }

const actions = {
  generateRoutes({
                   commit
                 }, roles) {
    return new Promise(resolve => {
      const loadMenuData = []
      // 先查询后台并返回左侧菜单数据并把数据添加到路由
      getAuthMenu(state.token).then(response => {
        let data = response

        //console.log(JSON.stringify(data))

        Object.assign(loadMenuData, data)
        asyncRoutes.length=0;
        generaMenu(asyncRoutes, loadMenuData)
        let accessedRoutes
        if (roles.includes('admin')) {
          // alert(JSON.stringify(asyncRoutes))
          accessedRoutes = asyncRoutes || []
        } else {
          accessedRoutes = filterAsyncRoutes(asyncRoutes, roles)
        }
        commit('SET_ROUTES', accessedRoutes)
        resolve(accessedRoutes)

        // generaMenu(asyncRoutes, data)
      }).catch(error => {
        console.log(error)
      })
    })
  }
}


export default {
  namespaced: true,
  state,
  mutations,
  actions
}