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 = (path,id) => {
  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)
}

/**
 * 后台查询的菜单数据拼装成路由格式的数据
 * @param routes
 */
export function generaMenu(routes, data) {
  data.forEach(item => {
    if (item.url === "/") {
      routes.push({
        path: '/',
        component: Layout,
        redirect: '/dashboard',
        children: [{
          path: 'dashboard',
          name: '系统首页',
          component: () => import('@/views/dashboard/index'),
          meta: {
            title: '系统首页',
            icon: 'dashboard'
          }
        }]
      })
    } else if (item.url === "##") {
       routes.push({
         path: item.path,
         component: Layout,
         children: [{
           path: item.path,
           name: item.name,
          component:  item.url === '#' ? Layout : loadView(item.path),
           meta: {
             title: item.name,
             id: item.id,
             roles: ['admin'],
             icon: item.icon
           }
         }]
       })
    } else {
      var path = item.url;
      if (item.path != "null" && item.path != null && item.path != "") {
        path = item.path
      }
      const menu = {
        path: (path === '#' ? item.id + '_key' : path),
        redirect: (item.children.length > 0 ? "noRedirect" : ""),
        component: item.url === '#' ? Layout : loadView(item.url),
        // hidden: true,
        children: [],
        name: 'menu_' + item.id,
        meta: {
          title: item.name,
          id: item.id,
          roles: ['admin'],

          icon: item.icon
        }
      }
      if (item.children) {
        generaMenu(menu.children, item.children)
      }
      routes.push(menu)
    }
  })
}

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
}