// Ported from legacy henza_admin/src/router.js
import { createRouter, createWebHistory } from 'vue-router';
import { adminRoute, fullPageAdminRoute } from './admin';
import { branchRoute, fullPageBranchRoute } from './branch';
import { iamAppUrl, isBranch, tokenName, userName } from '../utils';
import { useUsersStore } from '../stores/users';
import api from '../api/client';

const router = createRouter({
  history: createWebHistory(import.meta.env.BASE_URL),
  // legacy router.js:17-19
  scrollBehavior() {
    return { left: 0, top: 0 };
  },
  routes: [
    // ── MAIN LAYOUT ROUTES ──────────────────────────────────────────
    {
      path: '',
      component: () => import('../layouts/main/Main.vue'),
      children: isBranch() ? branchRoute : adminRoute,
    },
    // ── FULL PAGE LAYOUTS ───────────────────────────────────────────
    {
      path: '',
      component: () => import('../layouts/full-page/FullPage.vue'),
      children: [
        ...(isBranch() ? fullPageBranchRoute : fullPageAdminRoute),
        {
          path: '/auth/iam/callback',
          name: 'iam-callback',
          component: () => import('../views/auth/IamCallback.vue'),
          meta: { rule: 'editor' },
        },
        {
          path: '/pages/error-404',
          name: 'page-error-404',
          component: () => import('../views/pages/Error404.vue'),
          meta: { rule: 'editor' },
        },
        {
          path: '/pages/error-500',
          name: 'page-error-500',
          component: () => import('../views/pages/Error500.vue'),
          meta: { rule: 'editor' },
        },
        {
          path: '/pages/not-authorized',
          name: 'page-not-authorized',
          component: () => import('../views/pages/NotAuthorized.vue'),
          meta: { rule: 'editor' },
        },
        {
          path: '/pages/maintenance',
          name: 'page-maintenance',
          component: () => import('../views/pages/Maintenance.vue'),
          meta: { rule: 'editor' },
        },
      ],
    },
    // Redirect to 404 page, if no match found
    {
      path: '/:pathMatch(.*)*',
      redirect: '/pages/error-404',
    },
  ],
});

// legacy router.js:147-153
router.afterEach(() => {
  const appLoading = document.getElementById('loading-bg');
  if (appLoading) {
    appLoading.style.display = 'none';
  }
});

// legacy router.js:156-161
const noneAuthUrl = ['/auth/login', '/auth/forgot-password', '/auth/register', '/reg', '/auth/iam/callback'];

/**
 * Port of legacy getPermission() (router.js:163-182).
 *
 * Legacy cached the result in a MODULE-SCOPED `let roles`, which was never reset
 * on logout — so the next user to sign in on the same tab inherited the previous
 * user's permissions (bug #2 in docs/ADMIN-PORT-PLAN.md). Here the cache is the
 * Pinia users store, which auth.logout() clears; `roles === undefined` still
 * means "not fetched", exactly as legacy's check did.
 */
async function getPermission(): Promise<string[] | undefined> {
  const users = useUsersStore();
  if (users.roles) return users.roles;

  try {
    const { data } = await api.get('users/show');
    users.getRoles(data.permission);
    // Legacy stripped these before caching the user blob.
    delete data.permission;
    delete data.ut;
    if (data.api_token) {
      localStorage.setItem(tokenName, data.api_token);
    }
    localStorage.setItem(userName, JSON.stringify(data));
  } catch (e) {
    console.log(e);
  }
  return users.roles;
}

/**
 * Port of legacy router.beforeEach (router.js:184-199).
 *
 * One deliberate change: legacy's final line was a bare
 *   router.push({path: '/auth/login'})
 * with no next() call, which in Vue Router 4 leaves the navigation permanently
 * pending and hangs the app (bug #1). Returning the redirect is the Vue Router 4
 * equivalent and produces the same user-visible result.
 */
router.beforeEach(async (to) => {
  if (!localStorage.getItem(tokenName) && to.path !== '/auth/iam/callback' && sessionStorage.getItem('gb_admin_iam_sso_checked') !== '1') {
    sessionStorage.setItem('gb_admin_iam_sso_checked', '1');
    try {
      const { data } = await api.get('admin/auth/sso/start', {
        params: { redirect_uri: iamAppUrl('auth/iam/callback') },
      });
      if (data?.enabled && data.authorize_url) {
        window.location.assign(data.authorize_url);
        return false;
      }
    } catch {
      // سامانه هویت برای این پنل تنظیم نشده
    }
  }

  if (noneAuthUrl.indexOf(to.path) > -1) {
    return true;
  }

  const token = localStorage.getItem(tokenName);
  if (token) {
    const roles = await getPermission();
    if (roles && to.meta && to.meta.role && !roles.includes(to.meta.role as string)) {
      if (to.name === 'dashboard-ecommerce' || to.name === 'dashboard-analytics') {
        return { name: 'my-data' };
      }
      return { name: 'page-not-authorized' };
    }
    return true;
  }

  return { path: '/auth/login' };
});

export default router;