import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
import React from "react";
import ReactDOM from "react-dom/client";
import { createBrowserRouter, Navigate, RouterProvider } from "react-router-dom";
import { permissions } from "@mrp/shared";

import { AppShell } from "./components/AppShell";
import { ProtectedRoute } from "./components/ProtectedRoute";
import { AuthProvider } from "./auth/AuthProvider";
import { DashboardPage } from "./modules/dashboard/DashboardPage";
import { LoginPage } from "./modules/login/LoginPage";
import { ThemeProvider } from "./theme/ThemeProvider";
import "./index.css";

const queryClient = new QueryClient();

const CompanySettingsPage = React.lazy(() =>
  import("./modules/settings/CompanySettingsPage").then((module) => ({ default: module.CompanySettingsPage }))
);
const AdminDiagnosticsPage = React.lazy(() =>
  import("./modules/settings/AdminDiagnosticsPage").then((module) => ({ default: module.AdminDiagnosticsPage }))
);
const UserManagementPage = React.lazy(() =>
  import("./modules/settings/UserManagementPage").then((module) => ({ default: module.UserManagementPage }))
);
const CustomersPage = React.lazy(() =>
  import("./modules/crm/CustomersPage").then((module) => ({ default: module.CustomersPage }))
);
const VendorsPage = React.lazy(() =>
  import("./modules/crm/VendorsPage").then((module) => ({ default: module.VendorsPage }))
);
const CrmDetailPage = React.lazy(() =>
  import("./modules/crm/CrmDetailPage").then((module) => ({ default: module.CrmDetailPage }))
);
const CrmFormPage = React.lazy(() =>
  import("./modules/crm/CrmFormPage").then((module) => ({ default: module.CrmFormPage }))
);
const InventoryItemsPage = React.lazy(() =>
  import("./modules/inventory/InventoryItemsPage").then((module) => ({ default: module.InventoryItemsPage }))
);
const InventoryDetailPage = React.lazy(() =>
  import("./modules/inventory/InventoryDetailPage").then((module) => ({ default: module.InventoryDetailPage }))
);
const InventoryFormPage = React.lazy(() =>
  import("./modules/inventory/InventoryFormPage").then((module) => ({ default: module.InventoryFormPage }))
);
const WarehousesPage = React.lazy(() =>
  import("./modules/inventory/WarehousesPage").then((module) => ({ default: module.WarehousesPage }))
);
const WarehouseDetailPage = React.lazy(() =>
  import("./modules/inventory/WarehouseDetailPage").then((module) => ({ default: module.WarehouseDetailPage }))
);
const WarehouseFormPage = React.lazy(() =>
  import("./modules/inventory/WarehouseFormPage").then((module) => ({ default: module.WarehouseFormPage }))
);
const ProjectsPage = React.lazy(() =>
  import("./modules/projects/ProjectsPage").then((module) => ({ default: module.ProjectsPage }))
);
const ProjectDetailPage = React.lazy(() =>
  import("./modules/projects/ProjectDetailPage").then((module) => ({ default: module.ProjectDetailPage }))
);
const ProjectFormPage = React.lazy(() =>
  import("./modules/projects/ProjectFormPage").then((module) => ({ default: module.ProjectFormPage }))
);
const ManufacturingPage = React.lazy(() =>
  import("./modules/manufacturing/ManufacturingPage").then((module) => ({ default: module.ManufacturingPage }))
);
const WorkOrderDetailPage = React.lazy(() =>
  import("./modules/manufacturing/WorkOrderDetailPage").then((module) => ({ default: module.WorkOrderDetailPage }))
);
const WorkOrderFormPage = React.lazy(() =>
  import("./modules/manufacturing/WorkOrderFormPage").then((module) => ({ default: module.WorkOrderFormPage }))
);
const PurchaseListPage = React.lazy(() =>
  import("./modules/purchasing/PurchaseListPage").then((module) => ({ default: module.PurchaseListPage }))
);
const PurchaseDetailPage = React.lazy(() =>
  import("./modules/purchasing/PurchaseDetailPage").then((module) => ({ default: module.PurchaseDetailPage }))
);
const PurchaseFormPage = React.lazy(() =>
  import("./modules/purchasing/PurchaseFormPage").then((module) => ({ default: module.PurchaseFormPage }))
);
const SalesListPage = React.lazy(() =>
  import("./modules/sales/SalesListPage").then((module) => ({ default: module.SalesListPage }))
);
const SalesDetailPage = React.lazy(() =>
  import("./modules/sales/SalesDetailPage").then((module) => ({ default: module.SalesDetailPage }))
);
const SalesFormPage = React.lazy(() =>
  import("./modules/sales/SalesFormPage").then((module) => ({ default: module.SalesFormPage }))
);
const ShipmentListPage = React.lazy(() =>
  import("./modules/shipping/ShipmentListPage").then((module) => ({ default: module.ShipmentListPage }))
);
const ShipmentDetailPage = React.lazy(() =>
  import("./modules/shipping/ShipmentDetailPage").then((module) => ({ default: module.ShipmentDetailPage }))
);
const ShipmentFormPage = React.lazy(() =>
  import("./modules/shipping/ShipmentFormPage").then((module) => ({ default: module.ShipmentFormPage }))
);
const GanttPage = React.lazy(() =>
  import("./modules/gantt/GanttPage").then((module) => ({ default: module.GanttPage }))
);

function RouteFallback() {
  return (
    <div className="rounded-[20px] border border-line/70 bg-surface/90 p-4 text-sm text-muted shadow-panel">
      Loading module...
    </div>
  );
}

function lazyElement(element: React.ReactNode) {
  return <React.Suspense fallback={<RouteFallback />}>{element}</React.Suspense>;
}

const router = createBrowserRouter([
  { path: "/login", element: <LoginPage /> },
  {
    element: <ProtectedRoute />,
    children: [
      {
        element: <AppShell />,
        children: [
          { path: "/", element: <DashboardPage /> },
          {
            element: <ProtectedRoute requiredPermissions={[permissions.companyRead]} />,
            children: [{ path: "/settings/company", element: lazyElement(<CompanySettingsPage />) }],
          },
          {
            element: <ProtectedRoute requiredPermissions={[permissions.adminManage]} />,
            children: [
              { path: "/settings/admin-diagnostics", element: lazyElement(<AdminDiagnosticsPage />) },
              { path: "/settings/users", element: lazyElement(<UserManagementPage />) },
            ],
          },
          {
            element: <ProtectedRoute requiredPermissions={[permissions.crmRead]} />,
            children: [
              { path: "/crm/customers", element: lazyElement(<CustomersPage />) },
              { path: "/crm/customers/:customerId", element: lazyElement(<CrmDetailPage entity="customer" />) },
              { path: "/crm/vendors", element: lazyElement(<VendorsPage />) },
              { path: "/crm/vendors/:vendorId", element: lazyElement(<CrmDetailPage entity="vendor" />) },
            ],
          },
          {
            element: <ProtectedRoute requiredPermissions={[permissions.inventoryRead]} />,
            children: [
              { path: "/inventory/items", element: lazyElement(<InventoryItemsPage />) },
              { path: "/inventory/items/:itemId", element: lazyElement(<InventoryDetailPage />) },
              { path: "/inventory/warehouses", element: lazyElement(<WarehousesPage />) },
              { path: "/inventory/warehouses/:warehouseId", element: lazyElement(<WarehouseDetailPage />) },
            ],
          },
          {
            element: <ProtectedRoute requiredPermissions={[permissions.projectsRead]} />,
            children: [
              { path: "/projects", element: lazyElement(<ProjectsPage />) },
              { path: "/projects/:projectId", element: lazyElement(<ProjectDetailPage />) },
            ],
          },
          {
            element: <ProtectedRoute requiredPermissions={[permissions.manufacturingRead]} />,
            children: [
              { path: "/manufacturing/work-orders", element: lazyElement(<ManufacturingPage />) },
              { path: "/manufacturing/work-orders/:workOrderId", element: lazyElement(<WorkOrderDetailPage />) },
            ],
          },
          {
            element: <ProtectedRoute requiredPermissions={["purchasing.read"]} />,
            children: [
              { path: "/purchasing/orders", element: lazyElement(<PurchaseListPage />) },
              { path: "/purchasing/orders/:orderId", element: lazyElement(<PurchaseDetailPage />) },
            ],
          },
          {
            element: <ProtectedRoute requiredPermissions={[permissions.salesRead]} />,
            children: [
              { path: "/sales/quotes", element: lazyElement(<SalesListPage entity="quote" />) },
              { path: "/sales/quotes/:quoteId", element: lazyElement(<SalesDetailPage entity="quote" />) },
              { path: "/sales/orders", element: lazyElement(<SalesListPage entity="order" />) },
              { path: "/sales/orders/:orderId", element: lazyElement(<SalesDetailPage entity="order" />) },
            ],
          },
          {
            element: <ProtectedRoute requiredPermissions={[permissions.shippingRead]} />,
            children: [
              { path: "/shipping/shipments", element: lazyElement(<ShipmentListPage />) },
              { path: "/shipping/shipments/:shipmentId", element: lazyElement(<ShipmentDetailPage />) },
            ],
          },
          {
            element: <ProtectedRoute requiredPermissions={[permissions.crmWrite]} />,
            children: [
              { path: "/crm/customers/new", element: lazyElement(<CrmFormPage entity="customer" mode="create" />) },
              { path: "/crm/customers/:customerId/edit", element: lazyElement(<CrmFormPage entity="customer" mode="edit" />) },
              { path: "/crm/vendors/new", element: lazyElement(<CrmFormPage entity="vendor" mode="create" />) },
              { path: "/crm/vendors/:vendorId/edit", element: lazyElement(<CrmFormPage entity="vendor" mode="edit" />) },
            ],
          },
          {
            element: <ProtectedRoute requiredPermissions={[permissions.projectsWrite]} />,
            children: [
              { path: "/projects/new", element: lazyElement(<ProjectFormPage mode="create" />) },
              { path: "/projects/:projectId/edit", element: lazyElement(<ProjectFormPage mode="edit" />) },
            ],
          },
          {
            element: <ProtectedRoute requiredPermissions={[permissions.manufacturingWrite]} />,
            children: [
              { path: "/manufacturing/work-orders/new", element: lazyElement(<WorkOrderFormPage mode="create" />) },
              { path: "/manufacturing/work-orders/:workOrderId/edit", element: lazyElement(<WorkOrderFormPage mode="edit" />) },
            ],
          },
          {
            element: <ProtectedRoute requiredPermissions={["purchasing.write"]} />,
            children: [
              { path: "/purchasing/orders/new", element: lazyElement(<PurchaseFormPage mode="create" />) },
              { path: "/purchasing/orders/:orderId/edit", element: lazyElement(<PurchaseFormPage mode="edit" />) },
            ],
          },
          {
            element: <ProtectedRoute requiredPermissions={[permissions.salesWrite]} />,
            children: [
              { path: "/sales/quotes/new", element: lazyElement(<SalesFormPage entity="quote" mode="create" />) },
              { path: "/sales/quotes/:quoteId/edit", element: lazyElement(<SalesFormPage entity="quote" mode="edit" />) },
              { path: "/sales/orders/new", element: lazyElement(<SalesFormPage entity="order" mode="create" />) },
              { path: "/sales/orders/:orderId/edit", element: lazyElement(<SalesFormPage entity="order" mode="edit" />) },
            ],
          },
          {
            element: <ProtectedRoute requiredPermissions={[permissions.shippingWrite]} />,
            children: [
              { path: "/shipping/shipments/new", element: lazyElement(<ShipmentFormPage mode="create" />) },
              { path: "/shipping/shipments/:shipmentId/edit", element: lazyElement(<ShipmentFormPage mode="edit" />) },
            ],
          },
          {
            element: <ProtectedRoute requiredPermissions={[permissions.inventoryWrite]} />,
            children: [
              { path: "/inventory/items/new", element: lazyElement(<InventoryFormPage mode="create" />) },
              { path: "/inventory/items/:itemId/edit", element: lazyElement(<InventoryFormPage mode="edit" />) },
              { path: "/inventory/warehouses/new", element: lazyElement(<WarehouseFormPage mode="create" />) },
              { path: "/inventory/warehouses/:warehouseId/edit", element: lazyElement(<WarehouseFormPage mode="edit" />) },
            ],
          },
          {
            element: <ProtectedRoute requiredPermissions={[permissions.ganttRead]} />,
            children: [{ path: "/planning/gantt", element: lazyElement(<GanttPage />) }],
          },
        ],
      },
    ],
  },
  { path: "*", element: <Navigate to="/" replace /> },
]);

ReactDOM.createRoot(document.getElementById("root")!).render(
  <React.StrictMode>
    <ThemeProvider>
      <QueryClientProvider client={queryClient}>
        <AuthProvider>
          <RouterProvider router={router} />
        </AuthProvider>
      </QueryClientProvider>
    </ThemeProvider>
  </React.StrictMode>
);