import { createRouter, createWebHistory } from "vue-router";
import { useSessionStore } from "../stores/session";
import { useConfigStore } from "../stores/config";
import { isDesktop, logEvent } from "../desktop/bridge";

// One-time boot diagnostic: the first navigation is where config + session resolve,
// so it's the moment that tells us whether the app got past its startup gate.
let bootLogged = false;

const router = createRouter({
  history: createWebHistory(),
  routes: [
    {
      // Persistent authed shell (sidebar + top bar + search); children render in it.
      path: "/",
      component: () => import("../components/AppShell.vue"),
      meta: { requiresAuth: true },
      children: [
        { path: "", name: "board", component: () => import("../views/BoardView.vue") },
        { path: "archive", name: "archive", component: () => import("../views/BoardView.vue") },
        { path: "trash", name: "trash", component: () => import("../views/BoardView.vue") },
        { path: "label/:id", name: "label", component: () => import("../views/BoardView.vue") },
        { path: "search", name: "search", component: () => import("../views/SearchView.vue") },
        { path: "graph", name: "graph", component: () => import("../views/GraphView.vue") },
        { path: "reminders", name: "reminders", component: () => import("../views/RemindersView.vue") },
        { path: "timeline", name: "timeline", component: () => import("../views/TimelineView.vue") },
      ],
    },
    {
      path: "/settings",
      name: "settings",
      component: () => import("../views/SettingsView.vue"),
      meta: { requiresAuth: true, requiresAdmin: true },
    },
    {
      // Desktop only: connect this app to a server. Meaningless in the web build,
      // which IS a server's UI — there's nothing for it to link to.
      path: "/sync",
      name: "sync",
      component: () => import("../views/SyncView.vue"),
      meta: { requiresAuth: true, requiresDesktop: true },
    },
    {
      // Per-user account: linked devices (native-client sync tokens). Any user.
      //
      // The mirror of `requiresDesktop` above: this one needs a SERVER. The desktop
      // is itself one of the devices this page lists, so offline the list is always
      // empty and issuing a token rejects — its server relationship lives at /sync.
      // Guarded in the router, not just hidden in the shell, so a typed URL or a
      // restored history entry can't land on a dead end either.
      path: "/account",
      name: "account",
      component: () => import("../views/AccountView.vue"),
      meta: { requiresAuth: true, requiresServer: true },
    },
    {
      path: "/login",
      name: "login",
      component: () => import("../views/LoginView.vue"),
      meta: { guestOnly: true },
    },
    {
      path: "/register",
      name: "register",
      component: () => import("../views/RegisterView.vue"),
      meta: { guestOnly: true },
    },
  ],
});

router.beforeEach(async (to) => {
  const session = useSessionStore();
  const config = useConfigStore();
  await config.load();
  if (!session.loaded) {
    await session.fetchMe();
  }
  if (!bootLogged) {
    bootLogged = true;
    logEvent(
      "info",
      `first route: config(site=${config.siteName}) session(user=${session.user?.email ?? "none"}) -> ${String(to.name ?? to.path)}`,
    );
  }
  if (to.meta.requiresAuth && !session.user) {
    return { name: "login", query: to.fullPath !== "/" ? { redirect: to.fullPath } : undefined };
  }
  if (to.meta.requiresAdmin && !session.user?.is_admin) {
    return { name: "board" };
  }
  if (to.meta.requiresDesktop && !isDesktop()) {
    return { name: "board" };
  }
  // Deliberately NOT applied to /login and /register: bouncing those on desktop
  // would loop against the requiresAuth guard above the moment a session is
  // missing. Nothing on the desktop navigates to them any more (AppShell's sign-out
  // is web-only), and a fresh launch always resolves the local user.
  if (to.meta.requiresServer && isDesktop()) {
    return { name: "board" };
  }
  if (to.name === "register" && !config.allowRegistration) {
    return { name: "login" };
  }
  if (to.meta.guestOnly && session.user) {
    return { name: "board" };
  }
  return true;
});

export default router;