import {
  createRouter,
  createWebHashHistory,
  type RouteRecordRaw
} from 'vue-router'
import { usePermissionStoreHook } from '@/stores/modules/permission'


const Layouts = () => import('@/layouts/index.vue')

/**
 * 路由 name 与 FunctionList key 的映射
 * 一级菜单: route name → FunctionList 一级 key
 * 二级菜单(Settings 子路由): route name → FunctionList Settings 下的 key
 */
const menuPermissionMap: Record<string, string> = {
  // 一级菜单
  Settings: 'Settings',
  RemoteViewing: 'Remote',
  StandardProtocol: 'Protocol',
}

const subMenuPermissionMap: Record<string, string> = {
  // Settings 下的二级菜单
  SystemSettings: 'System_Settings',
  ImageDisplay: 'Image_Display',
  AudioVideo: 'Audio_Video',
  NetSettings: 'Network_Settings',
  AlarmSettings: 'Alarm_Settings',
}

export const constantRoutes: RouteRecordRaw[] = [
  {
    path: '/',
    name: 'PreviewLayout',
    component: Layouts,
    redirect: '/preview',
    children: [
      {
        path: '/preview',
        component: () => import('@/views/preview/index.vue'),
        name: 'Preview',
        meta: {
          title: 'Preview',
          isShow: true,
          icon: 'View'
        }
      }
    ]
  },
  {
    path: '/settings',
    name: 'Settings',
    component: Layouts,
    redirect: '/settings',
    meta: {
      title: 'Settings',
      isShow: true,
      icon: 'Setting'
    },
    children: [
      {
        path: '/settings/systemSettings',
        component: () => import('@/views/settings/systemSettings/index.vue'),
        name: 'SystemSettings',
        meta: {
          title: 'System Settings'
        }
      },
      {
        path: '/settings/imageDisplay',
        component: () => import('@/views/settings/imageDisplay/index.vue'),
        name: 'ImageDisplay',
        meta: {
          title: 'Image Display'
        }
      },
      {
        path: '/settings/audioVideo',
        component: () => import('@/views/settings/audioVideo/index.vue'),
        name: 'AudioVideo',
        meta: {
          title: 'Audio & Video'
        }
      },
      {
        path: '/settings/netSetting',
        component: () => import('@/views/settings/netSettings/index.vue'),
        name: 'NetSettings',
        meta: {
          title: 'Network Settings'
        }
      },
      {
        path: '/settings/alarmSettings',
        component: () => import('@/views/settings/alarmSettings/index.vue'),
        name: 'AlarmSettings',
        meta: {
          title: 'Alarm Settings'
        }
      }
    ]
  },
  {
    path: '/',
    name: 'RemoteLayout',
    component: Layouts,
    redirect: '/remoteViewing',
    children: [
      {
        path: '/remoteViewing',
        component: () => import('@/views/remoteViewing/index.vue'),
        name: 'RemoteViewing',
        meta: {
          title: 'Remote',
          isShow: true,
          icon: 'Monitor'
        }
      }
    ]
  },
  {
    path: '/',
    name: 'ProtocolLayout',
    component: Layouts,
    redirect: '/standardProtocol',
    children: [
      {
        path: '/standardProtocol',
        component: () => import('@/views/standardProtocol/index.vue'),
        name: 'StandardProtocol',
        meta: {
          title: 'Protocol',
          isShow: true,
          icon: 'Document'
        }
      }
    ]
  },
]

export const history = createWebHashHistory()

const router = createRouter({
  history,
  routes: [
    {
      path: '/login',
      component: () => import('@/views/login/index.vue'),
      name: 'Login'
    }
  ]
})

export default router

/** 清除所有动态注册的路由 */
function resetRouter() {
  // 移除所有 constantRoutes 中定义的路由（按 name 移除）
  const routeNames: string[] = []
  constantRoutes.forEach((route) => {
    if (route.name) {
      routeNames.push(route.name as string)
    }
    if (route.children) {
      route.children.forEach((child) => {
        if (child.name) {
          routeNames.push(child.name as string)
        }
      })
    }
  })
  routeNames.forEach((name) => {
    if (router.hasRoute(name)) {
      router.removeRoute(name)
    }
  })
}

/** 根据权限过滤路由并注册 */
export function setRouter() {
  // 先清除旧路由，避免重复注册
  resetRouter()

  const permissionStore = usePermissionStoreHook()

  const filteredRoutes = constantRoutes
    .filter((route) => {
      // 对于有单个子路由的一级菜单（Preview / Remote / Protocol）
      if (route.children && route.children.length === 1) {
        const child = route.children[0]
        const routeName = child.name as string
        const permKey = menuPermissionMap[routeName]
        if (permKey && !permissionStore.isMenuVisible(permKey)) {
          return false
        }
      }
      // 对于 Settings 这种有多个子路由的一级菜单
      if (route.name && menuPermissionMap[route.name as string]) {
        const permKey = menuPermissionMap[route.name as string]
        if (!permissionStore.isMenuVisible(permKey)) {
          return false
        }
      }
      return true
    })
    .map((route) => {
      // 过滤 Settings 的子路由
      if (route.name === 'Settings' && route.children) {
        const filteredChildren = route.children.filter((child) => {
          const childName = child.name as string
          const subPermKey = subMenuPermissionMap[childName]
          if (subPermKey) {
            return permissionStore.isSubMenuVisible(subPermKey)
          }
          return true
        })
        return { ...route, children: filteredChildren }
      }
      return route
    })
    // 如果 Settings 的子路由全被过滤掉了，移除 Settings 本身
    .filter((route) => {
      if (route.name === 'Settings' && route.children && route.children.length === 0) {
        return false
      }
      return true
    })

  filteredRoutes.forEach((item) => {
    router.addRoute(item)
  })
}