import { createRouter, createWebHistory } from 'vue-router';
import { useSessionStore } from '../stores/session';
import { useNavStore } from '../stores/navStore';
import { useTransitionStore } from '../stores/transitionStore';

// Legacy lazy-loaded every route component (`component: () => import(...)`) so
// the initial bundle only carries the entry route. Matched here.
export const router = createRouter({
  history: createWebHistory(),
  // Ported from legacy router/index.ts:225-237 — restore saved scroll on
  // back/forward, otherwise jump to top on every navigation.
  scrollBehavior(_to, _from, savedPosition) {
    if (savedPosition) return savedPosition;
    return { top: 0 };
  },
  routes: [
    // legacy's actual home route is /home (name: 'home'), not '/' — matched here.
    { path: '/home', name: 'home', component: () => import('../views/HomeView.vue') },
    {
      path: '/product/:id',
      name: 'singleProduct',
      component: () => import('../components/product/SingleProduct.vue'),
      props: true,
      meta: { layout: 'FullPage' },
    },
    { path: '/newest', name: 'newestProduct', component: () => import('../views/NewestView.vue'), meta: { layout: 'FullPage' } },
    { path: '/cart', name: 'cart', component: () => import('../views/CartView.vue') },
    { path: '/login', name: 'login', component: () => import('../views/user/LoginRegisterView.vue'), meta: { layout: 'FullPage' } },
    { path: '/user', name: 'userPage::hasSubRoute', component: () => import('../views/user/DashboardView.vue') },
    { path: '/orders', name: 'ordersList', component: () => import('../views/user/OrdersView.vue'), meta: { requiresAuth: true } },
    {
      path: '/transactions',
      name: 'transactionsList',
      component: () => import('../views/user/TransactionsView.vue'),
      meta: { requiresAuth: true },
    },
    { path: '/profile', name: 'profileData', component: () => import('../views/user/ProfileView.vue'), meta: { requiresAuth: true } },
    { path: '/favorites', name: 'favoritesList', component: () => import('../views/user/FavoritesView.vue'), meta: { requiresAuth: true } },
    { path: '/notifications', name: 'notifications', component: () => import('../views/user/NotificationsView.vue') },
    { path: '/search', name: 'search', component: () => import('../views/search/SearchView.vue') },
    { path: '/collection/:id?', name: 'collection', component: () => import('../views/search/CollectionView.vue') },
    // legacy redirects any unmatched path (including '/') to the home route by name.
    { path: '/', redirect: { name: 'home' } },
    { path: '/:pathMatch(.*)*', redirect: { name: 'home' } },
  ],
});

// Ported from legacy's main router guard: redirects an already-logged-in
// user away from /login, and blocks unauthenticated access to routes that
// require a session (legacy blocked ordersList/transactionsList/profileData/
// favoritesList/completeProfile the same way).
router.beforeEach((to) => {
  const session = useSessionStore();
  const nav = useNavStore();

  if (to.name === 'login' && session.customerId) {
    return { name: 'home' };
  }
  if (to.meta.requiresAuth && !session.customerId) {
    return { name: 'login', query: { redirect: to.fullPath } };
  }

  // legacy router/index.ts:268-270 — the product page slides down into view.
  if (to.name === 'singleProduct') nav.setPgaTransition('slideDown');
  else nav.setPgaTransition(undefined);
});

// Ported from legacy router/index.ts:273-286.
//
// setActiveLink moves the bottom-nav GSAP notch + bubble to the current tab,
// and this hook is its ONLY caller in the whole app — that part is live.
//
// The transitionFlag cycling below used to replay AppHeader's "shutter" enter
// animation. AppHeader was deleted when every screen moved to the redesigned
// components/ui/PageBar.vue, and nothing reads transitionFlag any more, so
// that half is currently inert. It is left in place rather than ripped out
// because transitionStore is still the shared home for this kind of
// page-transition state; flagged here so the next reader doesn't assume it
// still drives a visible animation.
router.afterEach((to) => {
  const nav = useNavStore();
  const transition = useTransitionStore();

  transition.setTransitionFlag(false);
  transition.setTransitionEnded(false);
  setTimeout(() => {
    transition.setTransitionFlag(true);
  }, 100);

  // Unconditional on both branches: this hook is the single source of truth for
  // tab-bar visibility. A screen may hide the bar for its own reasons while it
  // is open (SearchView does, for its filter sheet), and this is what clears
  // that override on the way out — the old `if (!nav.showNav)` guard made the
  // same write, just phrased as if something else might own the flag.
  const route = nav.navBarRoutes.find((x) => to.name === x.name);
  if (route) {
    nav.setActiveLink(route.index);
    nav.setNavVisibility(true);
  } else {
    nav.setNavVisibility(false);
  }
});