import React from 'react';
import { createBrowserRouter, Outlet, Navigate, useLocation, useParams } from 'react-router-dom';
import { useQuery } from '@tanstack/react-query';
import RouteErrorElement from '@/components/RouteErrorElement';
import { useAuth } from './auth/context';
import { useEventContext } from './context/EventContext';
import {
  ADMIN_BASE_PATH,
  ADMIN_BILLING_PATH,
  ADMIN_DEFAULT_AFTER_LOGIN_PATH,
  ADMIN_EVENTS_PATH,
  ADMIN_LOGIN_PATH,
  ADMIN_LOGIN_START_PATH,
  ADMIN_PUBLIC_LANDING_PATH,
  ADMIN_WELCOME_BASE_PATH,
} from './constants';
import { fetchOnboardingStatus, getTenantPackagesOverview } from './api';
import { resolveOnboardingRedirect } from './mobile/lib/onboardingGuard';
const AuthCallbackPage = React.lazy(() => import('./mobile/AuthCallbackPage'));
const LoginStartPage = React.lazy(() => import('./mobile/LoginStartPage'));
const LogoutPage = React.lazy(() => import('./mobile/LogoutPage'));
const MobileEventsPage = React.lazy(() => import('./mobile/EventsPage'));
const MobileEventPhotoboothPage = React.lazy(() => import('./mobile/EventPhotoboothPage'));
const MobileBrandingPage = React.lazy(() => import('./mobile/BrandingPage'));
const MobileEventFormPage = React.lazy(() => import('./mobile/EventFormPage'));
const MobileQrPrintPage = React.lazy(() => import('./mobile/QrPrintPage'));
const MobileQrLayoutCustomizePage = React.lazy(() => import('./mobile/QrLayoutCustomizePage'));
const MobileEventGuestNotificationsPage = React.lazy(() => import('./mobile/EventGuestNotificationsPage'));
const MobileEventControlRoomPage = React.lazy(() => import('./mobile/EventControlRoomPage'));
const MobileEventLiveShowSettingsPage = React.lazy(() => import('./mobile/EventLiveShowSettingsPage'));
const MobileEventMembersPage = React.lazy(() => import('./mobile/EventMembersPage'));
const MobileEventTasksPage = React.lazy(() => import('./mobile/EventTasksPage'));
const MobileEventRecapPage = React.lazy(() => import('./mobile/EventRecapPage'));
const MobileEventAnalyticsPage = React.lazy(() => import('./mobile/EventAnalyticsPage'));
const MobileNotificationsPage = React.lazy(() => import('./mobile/NotificationsPage'));
const MobileProfilePage = React.lazy(() => import('./mobile/ProfilePage'));
const MobileProfileAccountPage = React.lazy(() => import('./mobile/ProfileAccountPage'));
const MobileBillingPage = React.lazy(() => import('./mobile/BillingPage'));
const MobilePackageShopPage = React.lazy(() => import('./mobile/PackageShopPage'));
const MobileSettingsPage = React.lazy(() => import('./mobile/SettingsPage'));
const MobileDataExportsPage = React.lazy(() => import('./mobile/DataExportsPage'));
const MobileLoginPage = React.lazy(() => import('./mobile/LoginPage'));
const MobilePublicHelpPage = React.lazy(() => import('./mobile/PublicHelpPage'));
const MobileForgotPasswordPage = React.lazy(() => import('./mobile/ForgotPasswordPage'));
const MobileResetPasswordPage = React.lazy(() => import('./mobile/ResetPasswordPage'));
const MobileDashboardPage = React.lazy(() => import('./mobile/DashboardPage'));
const MobileTasksTabPage = React.lazy(() => import('./mobile/TasksTabPage'));
const MobileUploadsTabPage = React.lazy(() => import('./mobile/UploadsTabPage'));
const MobileAnimatedOutlet = React.lazy(() => import('./mobile/components/MobileAnimatedOutlet'));
const MobileWelcomeLandingPage = React.lazy(() => import('./mobile/welcome/WelcomeLandingPage'));
const MobileWelcomePackagesPage = React.lazy(() => import('./mobile/welcome/WelcomePackagesPage'));
const MobileWelcomeSummaryPage = React.lazy(() => import('./mobile/welcome/WelcomeSummaryPage'));
const MobileWelcomeEventPage = React.lazy(() => import('./mobile/welcome/WelcomeEventPage'));

function RequireAuth() {
  const { status, user } = useAuth();
  const location = useLocation();
  const { hasEvents, isLoading: eventsLoading } = useEventContext();
  const isWelcomePath = location.pathname.startsWith(ADMIN_WELCOME_BASE_PATH);
  const isBillingPath = location.pathname.startsWith(ADMIN_BILLING_PATH);
  const isTenantAdmin = Boolean(user && user.role !== 'member');
  const shouldCheckPackages =
    status === 'authenticated' && isTenantAdmin && !eventsLoading && !hasEvents && !isWelcomePath && !isBillingPath;

  const { data: packagesData, isLoading: packagesLoading } = useQuery({
    queryKey: ['mobile', 'onboarding', 'packages-overview'],
    queryFn: () => getTenantPackagesOverview({ force: true }),
    enabled: shouldCheckPackages,
    staleTime: 60_000,
  });

  const { data: onboardingStatus, isLoading: onboardingLoading } = useQuery({
    queryKey: ['mobile', 'onboarding', 'status'],
    queryFn: fetchOnboardingStatus,
    enabled: shouldCheckPackages,
    staleTime: 60_000,
  });

  const hasActivePackage =
    Boolean(packagesData?.activePackage) || Boolean(packagesData?.packages?.some((pkg) => pkg.active));
  const remainingEvents = packagesData?.activePackage?.remaining_events ?? null;
  const isOnboardingDismissed = Boolean(onboardingStatus?.steps?.dismissed_at);
  const isOnboardingCompleted = Boolean(onboardingStatus?.steps?.completed_at);
  const shouldBlockOnboarding = shouldCheckPackages && onboardingLoading;

  const redirectTarget = resolveOnboardingRedirect({
    hasEvents,
    hasActivePackage,
    remainingEvents,
    pathname: location.pathname,
    isBillingPath,
    isOnboardingDismissed,
    isOnboardingCompleted,
  });

  if (status === 'loading') {
    return (
      <div className="flex min-h-screen items-center justify-center text-sm text-muted-foreground">
        Bitte warten ...
      </div>
    );
  }

  if (status === 'unauthenticated') {
    return <Navigate to={ADMIN_LOGIN_START_PATH} state={{ from: location }} replace />;
  }

  if (!isWelcomePath && !isBillingPath && (eventsLoading || packagesLoading || shouldBlockOnboarding)) {
    return (
      <div className="flex min-h-screen items-center justify-center text-sm text-muted-foreground">
        Bitte warten ...
      </div>
    );
  }

  if (redirectTarget) {
    return <Navigate to={redirectTarget} replace />;
  }

  return (
    <React.Suspense fallback={<Outlet />}>
      <MobileAnimatedOutlet />
    </React.Suspense>
  );
}

function LandingGate() {
  const { status } = useAuth();

  if (status === 'loading') {
    return (
      <div className="flex min-h-screen items-center justify-center text-sm text-muted-foreground">
        Bitte warten ...
      </div>
    );
  }

  if (status === 'authenticated') {
    return <Navigate to={ADMIN_DEFAULT_AFTER_LOGIN_PATH} replace />;
  }

  return <Navigate to={ADMIN_LOGIN_PATH} replace />;
}

function RequireAdminAccess({ children }: { children: React.ReactNode }) {
  const { user } = useAuth();

  if (user?.role === 'member') {
    return <Navigate to={ADMIN_EVENTS_PATH} replace />;
  }

  return <>{children}</>;
}

function RedirectToMobileEvent({ buildPath }: { buildPath: (slug: string) => string }) {
  const { slug } = useParams<{ slug?: string }>();
  if (!slug) {
    return <Navigate to={ADMIN_EVENTS_PATH} replace />;
  }
  return <Navigate to={buildPath(slug)} replace />;
}

export const router = createBrowserRouter([
  {
    path: ADMIN_BASE_PATH,
    element: <Outlet />,
    errorElement: <RouteErrorElement />,
    children: [
      { index: true, element: <LandingGate /> },
      { path: 'login', element: <MobileLoginPage /> },
      { path: 'mobile/login', element: <MobileLoginPage /> },
      { path: 'help', element: <MobilePublicHelpPage /> },
      { path: 'forgot-password', element: <MobileForgotPasswordPage /> },
      { path: 'reset-password/:token', element: <MobileResetPasswordPage /> },
      { path: 'start', element: <LoginStartPage /> },
      { path: 'logout', element: <LogoutPage /> },
      { path: 'auth/callback', element: <AuthCallbackPage /> },
      {
        element: <RequireAuth />,
        children: [
          { path: 'dashboard', element: <RequireAdminAccess><MobileDashboardPage /></RequireAdminAccess> },
          { path: 'live', element: <RequireAdminAccess><MobileDashboardPage /></RequireAdminAccess> },
          { path: 'events', element: <Navigate to={ADMIN_EVENTS_PATH} replace /> },
          { path: 'events/new', element: <Navigate to={`${ADMIN_EVENTS_PATH}/new`} replace /> },
          { path: 'events/:slug', element: <RedirectToMobileEvent buildPath={(slug) => `${ADMIN_EVENTS_PATH}/${slug}`} /> },
          { path: 'events/:slug/recap', element: <RedirectToMobileEvent buildPath={(slug) => `${ADMIN_EVENTS_PATH}/${slug}`} /> },
          { path: 'events/:slug/edit', element: <RedirectToMobileEvent buildPath={(slug) => `${ADMIN_EVENTS_PATH}/${slug}/edit`} /> },
          { path: 'events/:slug/photos', element: <RedirectToMobileEvent buildPath={(slug) => `${ADMIN_EVENTS_PATH}/${slug}/control-room`} /> },
          { path: 'events/:slug/members', element: <RedirectToMobileEvent buildPath={(slug) => `${ADMIN_EVENTS_PATH}/${slug}/members`} /> },
          { path: 'events/:slug/tasks', element: <RedirectToMobileEvent buildPath={(slug) => `${ADMIN_EVENTS_PATH}/${slug}/tasks`} /> },
          { path: 'events/:slug/invites', element: <RedirectToMobileEvent buildPath={(slug) => `${ADMIN_EVENTS_PATH}/${slug}/qr`} /> },
          { path: 'events/:slug/branding', element: <RedirectToMobileEvent buildPath={(slug) => `${ADMIN_EVENTS_PATH}/${slug}/branding`} /> },
          { path: 'events/:slug/photobooth', element: <RedirectToMobileEvent buildPath={(slug) => `${ADMIN_EVENTS_PATH}/${slug}/photobooth`} /> },
          { path: 'events/:slug/guest-notifications', element: <RedirectToMobileEvent buildPath={(slug) => `${ADMIN_EVENTS_PATH}/${slug}/guest-notifications`} /> },
          { path: 'events/:slug/toolkit', element: <RedirectToMobileEvent buildPath={(slug) => `${ADMIN_EVENTS_PATH}/${slug}`} /> },
          { path: 'mobile/events', element: <MobileEventsPage /> },
          { path: 'mobile/events/:slug', element: <MobileDashboardPage /> },
          { path: 'mobile/events/:slug/branding', element: <RequireAdminAccess><MobileBrandingPage /></RequireAdminAccess> },
          { path: 'mobile/events/new', element: <RequireAdminAccess><MobileEventFormPage /></RequireAdminAccess> },
          { path: 'mobile/events/:slug/edit', element: <RequireAdminAccess><MobileEventFormPage /></RequireAdminAccess> },
          { path: 'mobile/events/:slug/qr', element: <RequireAdminAccess><MobileQrPrintPage /></RequireAdminAccess> },
          { path: 'mobile/events/:slug/qr/customize/:tokenId?', element: <RequireAdminAccess><MobileQrLayoutCustomizePage /></RequireAdminAccess> },
          { path: 'mobile/events/:slug/control-room', element: <RequireAdminAccess><MobileEventControlRoomPage /></RequireAdminAccess> },
          { path: 'mobile/events/:slug/photos/:photoId?', element: <RedirectToMobileEvent buildPath={(slug) => `${ADMIN_EVENTS_PATH}/${slug}/control-room`} /> },
          { path: 'mobile/events/:slug/live-show', element: <RedirectToMobileEvent buildPath={(slug) => `${ADMIN_EVENTS_PATH}/${slug}/control-room`} /> },
          { path: 'mobile/events/:slug/live-show/settings', element: <RequireAdminAccess><MobileEventLiveShowSettingsPage /></RequireAdminAccess> },
          { path: 'mobile/events/:slug/recap', element: <RequireAdminAccess><MobileEventRecapPage /></RequireAdminAccess> },
          { path: 'mobile/events/:slug/analytics', element: <RequireAdminAccess><MobileEventAnalyticsPage /></RequireAdminAccess> },
          { path: 'mobile/events/:slug/members', element: <RequireAdminAccess><MobileEventMembersPage /></RequireAdminAccess> },
          { path: 'mobile/events/:slug/tasks', element: <MobileEventTasksPage /> },
          { path: 'mobile/events/:slug/photobooth', element: <RequireAdminAccess><MobileEventPhotoboothPage /></RequireAdminAccess> },
          { path: 'mobile/events/:slug/guest-notifications', element: <RequireAdminAccess><MobileEventGuestNotificationsPage /></RequireAdminAccess> },
          { path: 'mobile/notifications', element: <MobileNotificationsPage /> },
          { path: 'mobile/notifications/:notificationId', element: <MobileNotificationsPage /> },
          { path: 'mobile/profile', element: <RequireAdminAccess><MobileProfilePage /></RequireAdminAccess> },
          { path: 'mobile/profile/account', element: <RequireAdminAccess><MobileProfileAccountPage /></RequireAdminAccess> },
          { path: 'mobile/billing', element: <RequireAdminAccess><MobileBillingPage /></RequireAdminAccess> },
          { path: 'mobile/billing/shop', element: <RequireAdminAccess><MobilePackageShopPage /></RequireAdminAccess> },
          { path: 'mobile/settings', element: <RequireAdminAccess><MobileSettingsPage /></RequireAdminAccess> },
          { path: 'mobile/exports', element: <RequireAdminAccess><MobileDataExportsPage /></RequireAdminAccess> },
          { path: 'mobile/dashboard', element: <MobileDashboardPage /> },
          { path: 'mobile/tasks', element: <MobileTasksTabPage /> },
          { path: 'mobile/uploads', element: <MobileUploadsTabPage /> },
          { path: 'mobile/welcome', element: <MobileWelcomeLandingPage /> },
          { path: 'mobile/welcome/packages', element: <MobileWelcomePackagesPage /> },
          { path: 'mobile/welcome/summary', element: <MobileWelcomeSummaryPage /> },
          { path: 'mobile/welcome/event', element: <MobileWelcomeEventPage /> },
        ],
      },
    ],
  },
  {
    path: '*',
    element: <Navigate to={ADMIN_PUBLIC_LANDING_PATH} replace />,
    errorElement: <RouteErrorElement />,
  },
]);