import router from '@/router';
import { RouteRecordRaw } from 'vue-router';
import { useUserStoreHook } from '@/store/modules/user';
import { usePermissionStoreHook } from '@/store/modules/permission';

import NProgress from 'nprogress';
import 'nprogress/nprogress.css';
NProgress.configure({ showSpinner: false });

const permissionStore = usePermissionStoreHook();

// 白名单路由
const whiteList = ['/login'];

// 查找第一个可用路由
function findFirstAvailableRoute(routes: RouteRecordRaw[]): string | undefined {
  for (const route of routes) {
    if (route.meta?.hidden) continue;
    
    if (route.children?.length > 0) {
      const child = route.children[0];
      // 优先使用 opturl 或 path
      const targetPath = child.opturl || child.path;
      return targetPath?.startsWith('/') ? targetPath : `/${targetPath}`;
    }
    
    const targetPath = route.opturl || route.path;
    return targetPath;
  }
  return '/404';
}

router.beforeEach(async (to, from, next) => {
  NProgress.start();
  const userStore = useUserStoreHook();
  
  if (userStore.Token) {
    // 登录成功，跳转到首页
    if (to.path === '/login') {
      next({ path: '/' });
      NProgress.done();
    } else {
      const hasGetUserInfo = userStore.roles.length > 0;
      
      if (hasGetUserInfo) {
        // 已获取用户信息，检查路由匹配
        if (to.matched.length === 0) {
          // 路由未匹配，可能是访问根路径
          if (to.path === '/') {
            const firstRoute = findFirstAvailableRoute(permissionStore.routes);
            if (firstRoute) {
              next(firstRoute);
              NProgress.done();
              return;
            }
          }
          from.name ? next({ name: from.name as any }) : next('/401');
        } else {
          next();
        }
      } else {
        try {
          const { roles } = await userStore.getInfo();
          const accessRoutes: RouteRecordRaw[] = await permissionStore.generateRoutes(roles);
          
          accessRoutes.forEach((route: any) => {
            router.addRoute(route);
          });
          
          // 关键：如果是根路径，加载完路由后跳转到第一个可用路由
          if (to.path === '/') {
            const firstRoute = findFirstAvailableRoute(accessRoutes);
            if (firstRoute) {
              next(firstRoute);
              NProgress.done();
              return;
            }
          }
          
          next({ ...to, replace: true });
        } catch (error) {
          console.log(error);
          await userStore.resetToken();
          next(`/login?redirect=${to.path}`);
          NProgress.done();
        }
      }
    }
  } else {
    // 未登录可以访问白名单页面
    if (whiteList.indexOf(to.path) !== -1) {
      next();
    } else {
      next(`/login?redirect=${to.path}`);
      NProgress.done();
    }
  }
});

router.afterEach(() => {
  NProgress.done();
});