import { createBrowserRouter } from 'react-router-dom';
import { lazy, Suspense } from 'react';
import Layout from './components/Layout';
import ProtectedRoute from './components/ProtectedRoute';
import LoginPage from './pages/LoginPage';
import { RouterErrorPage, NotFoundPage } from './pages/ErrorPages';

// Core pages - loaded immediately
import DashboardPage from './pages/DashboardPage';

// Lazy load all other pages to reduce initial bundle
const DailyWalkthroughPage = lazy(() => import('./pages/DailyWalkthroughPage'));
const RoomsPage = lazy(() => import('./pages/RoomsPage'));
const RoomDetailPage = lazy(() => import('./pages/RoomDetailPage'));
const BatchesPage = lazy(() => import('./pages/BatchesPage'));
const BatchDetailPage = lazy(() => import('./pages/BatchDetailPage'));
const TimeclockPage = lazy(() => import('./pages/TimeclockPage'));
const SuppliesPage = lazy(() => import('./pages/SuppliesPage'));
const TasksPage = lazy(() => import('./pages/TasksPage'));
const TaskTemplatesPage = lazy(() => import('./pages/TaskTemplatesPage'));
const WalkthroughSettingsPage = lazy(() => import('./pages/WalkthroughSettingsPage'));
const RolesPage = lazy(() => import('./pages/RolesPage'));
const TouchPointPage = lazy(() => import('./pages/TouchPointPage'));
const IPMDashboardPage = lazy(() => import('./pages/IPMDashboardPage'));
const SettingsPage = lazy(() => import('./pages/SettingsPage'));
const ReportsPage = lazy(() => import('./pages/ReportsPage'));

// Heavy components
const LayoutDesignerPage = lazy(() => import('./features/layout-designer/LayoutDesignerPage'));
const VisitorKioskPage = lazy(() => import('./pages/VisitorKioskPage'));
const VisitorManagementPage = lazy(() => import('./pages/VisitorManagementPage'));
const BadgePage = lazy(() => import('./pages/BadgePage'));

// Phase 10: Compliance & Audit
const AuditLogPage = lazy(() => import('./pages/AuditLogPage'));
const DocumentsPage = lazy(() => import('./pages/DocumentsPage'));

// Phase 13: Advanced Features
const EnvironmentDashboard = lazy(() => import('./pages/EnvironmentDashboard'));
const FinancialDashboard = lazy(() => import('./pages/FinancialDashboard'));
const InsightsDashboard = lazy(() => import('./pages/InsightsDashboard'));

// Loading spinner component for Suspense fallbacks
const PageLoader = () => (
    <div className="flex items-center justify-center p-8">
        <div className="animate-spin w-6 h-6 border-2 border-emerald-500 border-t-transparent rounded-full" />
    </div>
);

export const router = createBrowserRouter([
    {
        path: '/login',
        element: <LoginPage />,
    },
    // Visitor Kiosk - Public, no auth required
    {
        path: '/kiosk',
        element: (
            <Suspense fallback={
                <div className="h-screen w-screen bg-slate-900 flex items-center justify-center">
                    <div className="animate-spin w-8 h-8 border-2 border-emerald-500 border-t-transparent rounded-full" />
                </div>
            }>
                <VisitorKioskPage />
            </Suspense>
        ),
        errorElement: <RouterErrorPage />,
    },
    {
        path: '/badges/:id',
        element: (
            <Suspense fallback={
                <div className="h-screen w-screen bg-slate-900 flex items-center justify-center">
                    <div className="animate-spin w-8 h-8 border-2 border-emerald-500 border-t-transparent rounded-full" />
                </div>
            }>
                <BadgePage />
            </Suspense>
        ),
        errorElement: <RouterErrorPage />,
    },
    {
        path: '/',
        element: (
            <ProtectedRoute>
                <Layout />
            </ProtectedRoute>
        ),
        errorElement: <RouterErrorPage />,
        children: [
            {
                index: true,
                element: <DashboardPage />,
            },
            {
                path: 'walkthrough',
                element: <Suspense fallback={<PageLoader />}><DailyWalkthroughPage /></Suspense>,
            },
            {
                path: 'touch-points',
                element: <Suspense fallback={<PageLoader />}><TouchPointPage /></Suspense>,
            },
            {
                path: 'ipm',
                element: <Suspense fallback={<PageLoader />}><IPMDashboardPage /></Suspense>,
            },
            {
                path: 'rooms',
                element: <Suspense fallback={<PageLoader />}><RoomsPage /></Suspense>,
            },
            {
                path: 'rooms/:id',
                element: <Suspense fallback={<PageLoader />}><RoomDetailPage /></Suspense>,
            },
            {
                path: 'batches',
                element: <Suspense fallback={<PageLoader />}><BatchesPage /></Suspense>,
            },
            {
                path: 'batches/:id',
                element: <Suspense fallback={<PageLoader />}><BatchDetailPage /></Suspense>,
            },
            {
                path: 'timeclock',
                element: <Suspense fallback={<PageLoader />}><TimeclockPage /></Suspense>,
            },
            {
                path: 'supplies',
                element: <Suspense fallback={<PageLoader />}><SuppliesPage /></Suspense>,
            },
            {
                path: 'tasks',
                element: <Suspense fallback={<PageLoader />}><TasksPage /></Suspense>,
            },
            {
                path: 'tasks/templates',
                element: <Suspense fallback={<PageLoader />}><TaskTemplatesPage /></Suspense>,
            },
            {
                path: 'reports',
                element: <Suspense fallback={<PageLoader />}><ReportsPage /></Suspense>,
            },
            {
                path: 'roles',
                element: <Suspense fallback={<PageLoader />}><RolesPage /></Suspense>,
            },
            {
                path: 'visitors',
                element: <Suspense fallback={<PageLoader />}><VisitorManagementPage /></Suspense>,
            },
            {
                path: 'settings',
                element: <Suspense fallback={<PageLoader />}><SettingsPage /></Suspense>,
            },
            {
                path: 'settings/walkthrough',
                element: <Suspense fallback={<PageLoader />}><WalkthroughSettingsPage /></Suspense>,
            },
            // Phase 10: Compliance & Audit
            {
                path: 'compliance/audit',
                element: <Suspense fallback={<PageLoader />}><AuditLogPage /></Suspense>,
            },
            {
                path: 'compliance/documents',
                element: <Suspense fallback={<PageLoader />}><DocumentsPage /></Suspense>,
            },
            // Phase 13: Advanced Features
            {
                path: 'environment',
                element: <Suspense fallback={<PageLoader />}><EnvironmentDashboard /></Suspense>,
            },
            {
                path: 'financial',
                element: <Suspense fallback={<PageLoader />}><FinancialDashboard /></Suspense>,
            },
            {
                path: 'insights',
                element: <Suspense fallback={<PageLoader />}><InsightsDashboard /></Suspense>,
            },
            // 404 catch-all
            {
                path: '*',
                element: <NotFoundPage />,
            },
        ],
    },
    // Layout Designer - Full screen, outside main layout
    {
        path: '/layout-designer',
        element: (
            <ProtectedRoute>
                <Suspense fallback={
                    <div className="h-screen w-screen bg-slate-950 flex items-center justify-center">
                        <div className="animate-spin w-8 h-8 border-2 border-emerald-500 border-t-transparent rounded-full" />
                    </div>
                }>
                    <LayoutDesignerPage />
                </Suspense>
            </ProtectedRoute>
        ),
        errorElement: <RouterErrorPage />,
    },
]);