import Vue from 'vue';
import NProgress from 'nprogress';
import VueRouter from 'vue-router';
import {
  WHITE_LIST,
  REDIRECT_PATH,
  LAYOUT_PATH,
  SYSTEM_NAME,
  HOME_PATH,
  isHomeAliasPath,
} from '@/config/setting';
import store from '@/store';
import { getToken, setToken, getCurrentUser, removeToken } from '@/utils/token-util';
import { routes, getMenuRoutes } from './routes';
import { changeRole } from '@/api/layout';
import { rewriteLegacyHrMenus } from '@/utils/menu-rewrite';

Vue.use(VueRouter);

// 与 EOM/WT 一致：
// - 乾坤嵌入：base = /page-{SYSTEM_NAME}/（对应主应用 activeRule）
// - 独立运行：base = /{SYSTEM_NAME}/（对应 publicPath /hr）
const routerOptions = {
  base: window.__POWERED_BY_QIANKUN__
    ? `/page-${SYSTEM_NAME}/`
    : `/${SYSTEM_NAME}/`,
  routes,
  mode: 'history',
  scrollBehavior() {
    return { y: 0 };
  },
};

function createRouter() {
  return new VueRouter(routerOptions);
}

const router = createRouter();

/** 动态路由是否已挂到当前 matcher（用标记，避免 getRoutes 长度比较死循环） */
let dynamicRoutesReady = false;

/** 重新登录 / 切角色前清空动态路由，避免重复注册导致白屏 */
export function resetRouter() {
  const newRouter = createRouter();
  router.matcher = newRouter.matcher;
  dynamicRoutesReady = false;
}

function registerMenuRoutes(menus, homePath, authoritiesRouter = []) {
  resetRouter();
  const nextMenus = rewriteLegacyHrMenus(menus || []);
  const nextAuth = rewriteLegacyHrMenus(authoritiesRouter || []);
  store.commit('user/setMenus', nextMenus);
  store.commit('user/setAuthoritiesRouter', nextAuth);
  router.addRoute(
    getMenuRoutes(
      [...nextMenus, ...nextAuth],
      homePath || HOME_PATH || '/home',
    ),
  );
  dynamicRoutesReady = true;
}

/** 供登录页等外部主动注册动态路由 */
export function setupDynamicRoutes(menus, homePath, authoritiesRouter = []) {
  registerMenuRoutes(menus, homePath, authoritiesRouter);
}

router.beforeEach((to, from, next) => {
  if (!from.path.includes(REDIRECT_PATH)) {
    NProgress.start();
  }

  if (getToken()) {
    // 已登录访问登录页：直接进首页，避免停在空白态
    if (to.path === '/login') {
      next({ path: HOME_PATH || '/home', replace: true });
      return;
    }

    // 旧首页别名统一跳到 /home，避免再开「首页」可关闭页签
    if (isHomeAliasPath(to.path) && to.path !== (HOME_PATH || '/home')) {
      next({
        path: HOME_PATH || '/home',
        query: to.query,
        hash: to.hash,
        replace: true,
      });
      return;
    }

    if (!store.state.user.menus?.length) {
      store
        .dispatch('user/fetchUserInfo')
        .then(({ menus, homePath, authoritiesRouter }) => {
          registerMenuRoutes(menus, homePath, authoritiesRouter);
          next({ ...to, replace: true });
        })
        .catch((e) => {
          console.error(e);
          removeToken();
          store.commit('user/setMenus', null);
          store.commit('user/setAuthoritiesRouter', []);
          resetRouter();
          next({ path: '/login', replace: true });
        });
      return;
    }

    // 有菜单但动态路由未就绪时补注册（热更新 / reset 后）
    if (!dynamicRoutesReady) {
      registerMenuRoutes(
        store.state.user.menus,
        HOME_PATH || '/home',
        store.state.user.authoritiesRouter || [],
      );
      next({ ...to, replace: true });
      return;
    }

    next();
    return;
  }

  if (WHITE_LIST.includes(to.path)) {
    next();
    return;
  }

  next({
    path: '/login',
    query: to.path === LAYOUT_PATH ? {} : { from: to.path },
  });
});

router.afterEach((to) => {
  if (!to.path.includes(REDIRECT_PATH) && NProgress.isStarted()) {
    setTimeout(() => {
      NProgress.done(true);
    }, 200);
  }
});

router.roleChange = async ({ menus, homePath, authoritiesRouter }) => {
  const currentUser = getCurrentUser();
  if (menus?.length) {
    registerMenuRoutes(menus, homePath, authoritiesRouter);
    const target = HOME_PATH || menus[0].redirect || menus[0].path;
    if (router.currentRoute.path !== target) {
      await router.replace({ path: target });
    }
    const newToken = await changeRole({
      groupId: currentUser.currentGroupId,
      roleId: currentUser.currentRoleId,
    });
    setToken(newToken);
    setTimeout(() => {
      window.location.reload();
    }, 100);
  }
};

export function getRouter() {
  return router;
}

export default router;