import { createRouter, createWebHistory } from 'vue-router'
import { useUserStore } from '@/stores/user-store'
import { getToken } from '@/utils/auth'


const router = createRouter({
  history: createWebHistory(),
  routes: [
    {
      path: '/login',
      name: 'Login',
      component: () => import('@/views/login/index.vue'),
      meta: { hidden: true }
    },
    {
      path: '/profile',
      component: () => import('@/components/Layout/index.vue'),
      meta: { hidden: true },
      children: [
        {
          path: '',
          name: 'Profile',
          component: () => import('@/views/profile/index.vue'),
          meta: { title: '个人中心' }
        }
      ]
    },
    {
      path: '/:pathMatch(.*)*',
      name: 'NotFound',
      component: () => import('@/views/error/404.vue'),
      meta: { hidden: true }
    },
    {
      path: '/',
      component: () => import('@/components/Layout/index.vue'),
      redirect: '/dashboard',
      children: [
        {
          path: 'dashboard',
          name: 'Dashboard',
          component: () => import('@/views/dashboard/index.vue'),
          meta: { title: '首页', icon: 'HomeFilled' }
        }
      ]
    },
    {
      path: '/workbench',
      component: () => import('@/components/Layout/index.vue'),
      meta: { title: '工作台', icon: 'Monitor' },
      children: [
        {
          path: '',
          name: 'Workbench',
          component: () => import('@/views/workbench/index.vue'),
          meta: { title: '智能工作台', icon: 'Monitor' }
        }
      ]
    },
    {
      path: '/analysis',
      component: () => import('@/components/Layout/index.vue'),
      redirect: '/analysis/flow',
      meta: { title: '数据看板', icon: 'TrendCharts' },
      children: [
        {
          path: 'flow',
          name: 'FlowAnalysis',
          component: () => import('@/views/analysis/index.vue'),
          meta: { title: '流程分析看板', icon: 'TrendCharts' }
        }
      ]
    },
    {
      path: '/system',
      component: () => import('@/components/Layout/index.vue'),
      redirect: '/system/user',
      meta: { title: '系统管理', icon: 'Setting' },
      children: [
        {
          path: 'user',
          name: 'User',
          component: () => import('@/views/system/user/index.vue'),
          meta: { title: '用户管理', icon: 'UserFilled' }
        },
        {
          path: 'role',
          name: 'Role',
          component: () => import('@/views/system/role/index.vue'),
          meta: { title: '审批角色', icon: 'User' }
        },
      ]
    },
    {
      path: '/flow',
      component: () => import('@/components/Layout/index.vue'),
      redirect: '/flow/definition',
      meta: { title: '流程管理', icon: 'Connection' },
      children: [
        {
          path: 'designer',
          name: 'FlowDesigner',
          component: () => import('@/views/flow/designer/index.vue'),
          meta: { title: '流程设计器', icon: 'EditPen' }
        },
        {
          path: 'definition',
          name: 'FlowDefinition',
          component: () => import('@/views/flow/definition/index.vue'),
          meta: { title: '流程管理', icon: 'Document' }
        }
      ]
    },
    {
      path: '/approval',
      component: () => import('@/components/Layout/index.vue'),
      redirect: '/approval/todo',
      meta: { title: '审批中心', icon: 'Stamp' },
      children: [
        {
          path: 'todo',
          name: 'Todo',
          component: () => import('@/views/flow/task/todo.vue'),
          meta: { title: '我的待办', icon: 'Bell' }
        },
        {
          path: 'handled',
          name: 'Handled',
          component: () => import('@/views/flow/task/handled.vue'),
          meta: { title: '我的已办', icon: 'CircleCheck' }
        },
        {
          path: 'cc',
          name: 'Cc',
          component: () => import('@/views/flow/task/cc.vue'),
          meta: { title: '我的抄送', icon: 'Message' }
        },
        {
          path: 'mine',
          name: 'MyInstance',
          component: () => import('@/views/flow/instance/mine.vue'),
          meta: { title: '我的流程', icon: 'List' }
        },
        {
          path: 'execute',
          name: 'FlowExecute',
          component: () => import('@/views/flow/execute/index.vue'),
          meta: { title: '流程执行', icon: 'Pointer' }
        },
        {
          path: 'all',
          name: 'AllInstance',
          component: () => import('@/views/flow/instance/all.vue'),
          meta: { title: '流程明细', icon: 'Document' }
        }
      ]
    }
  ]
})

const publicPaths = new Set(['/login'])

// 按员工类型限制的路径
const permissionPaths: Record<string, Set<string>> = {
  common_user: new Set(['/', '/dashboard', '/login', '/profile', '/approval/todo', '/approval/handled', '/approval/mine', '/approval/execute', '/approval/cc']),
  dept_manager: new Set(['/', '/dashboard', '/login', '/profile', '/system/user', '/system/role', '/approval/todo', '/approval/handled', '/approval/mine', '/approval/execute', '/approval/cc']),
  flow_manager: new Set(['/', '/dashboard', '/login', '/profile', '/flow/designer', '/flow/definition', '/flow/instance/all', '/approval/todo', '/approval/handled', '/approval/mine', '/approval/execute', '/approval/cc', '/analysis']),
  super_admin: new Set(['/', '/dashboard', '/login', '/profile', '/system/user', '/system/role', '/flow/designer', '/flow/definition', '/flow/instance/all', '/approval/todo', '/approval/handled', '/approval/mine', '/approval/execute', '/approval/cc', '/analysis'])
}

function isPathAllowed(allowedSet: Set<string>, path: string): boolean {
  if (allowedSet.has(path)) return true
  // 允许子路径，但父路径必须以 / 结尾或精确匹配
  for (const allowed of allowedSet) {
    if (allowed !== '/' && path.startsWith(allowed + '/')) {
      return true
    }
  }
  return false
}

// 防止快速切换 tab 时并发多次拉取用户信息
let fetchingUserInfo: Promise<unknown> | null = null

router.beforeEach(async (to, from, next) => {
  const token = getToken()
  // 404、登录页等公开页面直接放行
  if (publicPaths.has(to.path) || to.name === 'NotFound') {
    next()
    return
  }
  if (token) {
    const userStore = useUserStore()
    if (!userStore.userInfo) {
      try {
        if (!fetchingUserInfo) {
          fetchingUserInfo = userStore.fetchUserInfo().catch(async (err) => {
            await userStore.logoutAction()
            throw err
          })
        }
        await fetchingUserInfo
      } catch {
        next(`/login?redirect=${to.path}`)
        return
      } finally {
        fetchingUserInfo = null
      }
    }
    // 按 employeeType 限制
    const employeeType = userStore.userInfo?.employeeType || 'common_user'
    const allowedPaths = permissionPaths[employeeType] || permissionPaths['common_user']
    if (!isPathAllowed(allowedPaths, to.path)) {
      next('/dashboard')
      return
    }
    next()
  } else {
    next(`/login?redirect=${to.path}`)
  }
})

export default router