import {
  ArrowLeftRight,
  Boxes,
  Building2,
  Container,
  FileSignature,
  FileText,
  Hammer,
  LayoutDashboard,
  LayoutGrid,
  MapPin,
  Network,
  Package,
  PackageCheck,
  PackageOpen,
  Paperclip,
  Receipt,
  ScrollText,
  Send,
  Settings,
  ShieldCheck,
  Ship,
  SlidersHorizontal,
  Train,
  Truck,
  Users,
  Wallet,
  LifeBuoy,
  TrainFront,
} from "lucide-react";
import { useEffect } from "react";
import {
  Navigate,
  Outlet,
  Route,
  Routes,
  useLocation,
  useNavigate,
  useParams,
} from "react-router-dom";

import {
  FreightDashboardLayout,
  type SidebarItem,
  type SidebarSection,
} from "@/components/layout";
import { useAuth } from "./auth/useAuth";
import LoadingScreen from "./components/LoadingScreen";
import LoginPage from "./pages/auth/LoginPage";
import ForgotPasswordPage from "./pages/auth/ForgotPasswordPage";
import BookingContractPage from "./pages/bookings/BookingContractPage";
import BookingRequestDetailPage from "./pages/bookings/BookingRequestDetailPage";
import BookingRequestsPage from "./pages/bookings/BookingRequestsPage";
import NewBookingPage from "./pages/bookings/NewBookingPage";
import ContractRequestsPage from "./pages/contracts/ContractRequestsPage";
import ContractRequestDetailPage from "./pages/contracts/ContractRequestDetailPage";
import ContractViewPage from "./pages/contracts/ContractViewPage";
import ContractClearanceListPage from "./pages/contracts/ContractClearanceListPage";
import ContractClearanceDetailPage from "./pages/contracts/ContractClearanceDetailPage";
import ClearanceDocumentsPage from "./pages/contracts/ClearanceDocumentsPage";
import GlDjiboutiClearanceListPage from "./pages/contracts/GlDjiboutiClearanceListPage";
import GlClearanceDetailPage from "./pages/contracts/GlClearanceDetailPage";
import ShipmentRequestsPage from "./pages/contracts/ShipmentRequestsPage";
import ShipmentRequestDetailPage from "./pages/contracts/ShipmentRequestDetailPage";
import GlCreateBookingForm from "./components/contracts/GlCreateBookingForm";
import DocumentClearanceDetailPage from "./pages/bookings/DocumentClearanceDetailPage";
import DocumentClearanceListPage from "./pages/bookings/DocumentClearanceListPage";
import CustomerDetailPage from "./pages/customers/CustomerDetailPage";
import CustomersPage from "./pages/customers/CustomersPage";
import InvoiceDetailPage from "./pages/invoices/InvoiceDetailPage";
import InvoicesPage from "./pages/invoices/InvoicesPage";
import MyProfilePage from "./pages/dashboard/MyProfilePage";
import OverviewPage from "./pages/dashboard/OverviewPage";
import AiBookingMockTestPage from "./pages/ai/AiBookingMockTestPage";
import PaymentsPage from "./pages/payments/PaymentsPage";
//import EmployeesPage from "./pages/dashboard/user-management/EmployeesPage";
import { RequirePermission } from "./components/auth/RequirePermission";
import {
  FREIGHT_PERMS,
  hasPermission as hasFreightPermission,
  isDjiboutiGl,
  isEthiopianGl,
  isSuperAdmin,
} from "./lib/permissions";
import FileUploadSettingsPage from "./pages/documents/FileUploadSettingsPage";
import DropdownSettingsPage from "./pages/dropdown_settings/DropdownSettingsPage";
import ContractTemplatesPage from "./pages/contract_templates/ContractTemplatesPage";
import ContractTemplateEditorPage from "./pages/contract_templates/ContractTemplateEditorPage";
import FleetResourcePage from "./pages/fleet/FleetResourcePage";
import WagonTransfersPage from "./pages/wagons/WagonTransfersPage";
import VehicleDetailPage from "./pages/fleet/VehicleDetailPage";
import DriverDetailPage from "./pages/fleet/DriverDetailPage";
import RoutesPage from "./pages/fleet/RoutesPage";
import FuelPurchasePage from "./pages/fleet/FuelPurchasePage";
import FuelStatsPage from "./pages/fleet/FuelStatsPage";
import { MaintenancePage } from "./pages/fleet/MaintenancePage";
import { FinancialReportsPage } from "./pages/fleet/FinancialReportsPage";
import { FleetDashboard } from "./pages/fleet/FleetDashboard";
import { TrackingPage } from "./pages/fleet/TrackingPage";
import CompliancePage from "./pages/fleet/CompliancePage";
import IncidentsPage from "./pages/fleet/IncidentsPage";
import WorkOrdersPage from "./pages/fleet/WorkOrdersPage";
import ProcurementPage from "./pages/fleet/ProcurementPage";
import { getCategorySidebarChildren } from "./pages/ruleEngine/config/resources";
import RuleEngineLegacyRedirect from "./pages/ruleEngine/RuleEngineLegacyRedirect";
import RuleEngineResourcePage from "./pages/ruleEngine/RuleEngineResourcePage";
import CargoTypesPage from "./pages/ruleEngine/CargoTypesPage";
import TrainScheduleV2ListPage from "./pages/trainScheduling/TrainScheduleV2ListPage";
import BatchBoardPage from "./pages/trainScheduling/BatchBoardPage";
import BatchScheduleDetailPage from "./pages/trainScheduling/BatchScheduleDetailPage";
import TrainScheduleV2DetailPage from "./pages/trainScheduling/TrainScheduleV2DetailPage";
import TrainScheduleTrackPage from "./pages/trainScheduling/TrainScheduleTrackPage";
import TrainSchedulingGlobalRulesPage from "./pages/trainScheduling/TrainSchedulingGlobalRulesPage";
import ContractValidityPeriodsPage from "./pages/configuration/ContractValidityPeriodsPage";
import FirstMilePage from "./pages/operations/FirstMilePage";
import LastMilePage from "./pages/operations/LastMilePage";
import TrainDetailPage from "./pages/trains/TrainDetailPage";
import TrainBuilderDetailPage from "./pages/trainBuilder/TrainBuilderDetailPage";
import TrainBuilderListPage from "./pages/trainBuilder/TrainBuilderListPage";
import ArrivalQueuePage from "./pages/warehouses/ArrivalQueuePage";
import DispatchQueuePage from "./pages/warehouses/DispatchQueuePage";
import ExportDjiboutiUnloadingQueuePage from "./pages/warehouses/ExportDjiboutiUnloadingQueuePage";
import ExportWarehouseFlowPage from "./pages/warehouses/ExportWarehouseFlowPage";
import ImportWarehouseFlowPage from "./pages/warehouses/ImportWarehouseFlowPage";
import InterchangeDocumentsPage from "./pages/warehouses/InterchangeDocumentsPage";
import InventoryInquiryPage from "./pages/warehouses/InventoryInquiryPage";
import LoadedInventoryPage from "./pages/warehouses/LoadedInventoryPage";
import LoadingQueuePage from "./pages/warehouses/LoadingQueuePage";
import IntercityPage from "./pages/warehouses/IntercityPage";
import TrucksOnSitePage from "./pages/warehouses/TrucksOnSitePage";
import WarehouseDashboardPage from "./pages/warehouses/WarehouseDashboardPage";
import WarehouseDetailPage from "./pages/warehouses/WarehouseDetailPage";
import WarehouseInventoryPage from "./pages/warehouses/WarehouseInventoryPage";
import WarehouseInvoicesPage from "./pages/warehouses/WarehouseInvoicesPage";
import WarehouseListPage from "./pages/warehouses/WarehouseListPage";
import WarehouseRulesPage from "./pages/warehouses/WarehouseRulesPage";
import { HealthCheck } from "./features/health/HealthCheck";
import FaydaCallbackPage from "./pages/FaydaCallbackPage";
import { UserManagementRoutes } from "./user-management/route";
import SetPassword from "./shared/components/SetPassword";
import SupportInboxPage from "./pages/support/SupportInboxPage";

const buildSidebarSections = (demoItems: SidebarItem[]): SidebarSection[] => [
  {
    title: "Main menu",
    items: [
      {
        label: "Overview",
        href: "/dashboard/overview",
        icon: <LayoutDashboard />,
        permission: FREIGHT_PERMS.overview.view,
      },
      {
        label: "Customers",
        href: "/dashboard/customers",
        icon: <Building2 />,
        permission: FREIGHT_PERMS.customers.view,
      },
      {
        label: "Contracts",
        href: "/dashboard/contract-requests",
        icon: <FileSignature />,
        permission: FREIGHT_PERMS.contracts.view,
      },
      {
        label: "Bookings",
        href: "/dashboard/booking-requests",
        icon: <FileText />,
        permission: FREIGHT_PERMS.bookings.view,
      },
      // Operations hub: clearance-document review for contracts WITHOUT
      // customs clearing (contract-level for one-time, per-booking for general).
      {
        label: "Clearance Documents",
        href: "/dashboard/contracts/clearance-documents",
        icon: <ShieldCheck />,
        permission: FREIGHT_PERMS.contracts.opsClearanceReview,
      },
      {
        label: "Payments",
        href: "/dashboard/payments",
        icon: <Wallet />,
        permission: FREIGHT_PERMS.bookings.view,
      },
      {
        label: "Invoices",
        href: "/dashboard/invoices",
        icon: <Receipt />,
        permission: FREIGHT_PERMS.bookings.view,
      },
      {
        label: "Support",
        href: "/dashboard/support",
        icon: <LifeBuoy />,
        permission: FREIGHT_PERMS.support.view,
      },
      ...demoItems,
    ],
  },
  {
    // title: "Port & Terminal",
    items: [
      {
        label: "Operations",
        icon: <Settings />,
        children: [
          {
            label: "Clearance",
            href: "/dashboard/contracts/clearance",
            icon: <ShieldCheck />,
            permission: [
              FREIGHT_PERMS.contracts.clearanceReview,
              FREIGHT_PERMS.contracts.clearanceEtActions,
            ],
          },
          // {
          //   label: "Shipment Requests",
          //   href: "/dashboard/shipment-requests",
          //   icon: <Send />,
          //   permission: FREIGHT_PERMS.contracts.createBooking,
          // },
          // Operations Path A queue: per-booking self-clearance review for
          // GENERAL non-customs booking instances (and legacy self-clear bookings).
          // {
          //   label: "Self-Clearance Review",
          //   href: "/dashboard/contracts/ops-clearance",
          //   icon: <ShieldCheck />,
          //   permission: FREIGHT_PERMS.contracts.opsClearanceReview,
          // },
          {
            label: "GL Djibouti Clearance",
            href: "/dashboard/gl-djibouti/clearance",
            icon: <Ship />,
            permission: FREIGHT_PERMS.contracts.clearanceDjActions,
          },
          {
            label: "Train Schedules",
            href: "/dashboard/operations/train-scheduling-v2",
            icon: <Train />,
            permission: FREIGHT_PERMS.trainScheduling.view,
          },
          {
            label: "Batch Board",
            href: "/dashboard/operations/batch-board",
            icon: <LayoutGrid />,
            permission: FREIGHT_PERMS.trainScheduling.view,
          },
          {
            label: "First Mile",
            href: "/dashboard/operations/first-mile",
            icon: <Truck />,
            permission: FREIGHT_PERMS.firstMile.view,
          },
          {
            label: "Last Mile",
            href: "/dashboard/operations/last-mile",
            icon: <Truck />,
            permission: FREIGHT_PERMS.lastMile.view,
          },
        ],
      },
      {
        label: "Fleet Management",
        icon: <Truck />,
        children: [
          {
            label: "Fleet Dashboard",
            href: "/dashboard/fleet-dashboard",
            icon: <LayoutDashboard />,
            permission: FREIGHT_PERMS.fleetDashboard.view,
          },
          {
            label: "Routes",
            href: "/dashboard/routes",
            icon: <Network />,
            permission: [FREIGHT_PERMS.routes.view, FREIGHT_PERMS.fleet.view],
          },
          {
            label: "Locomotives",
            href: "/dashboard/locomotives",
            icon: <Train />,
            permission: [FREIGHT_PERMS.locomotives.view, FREIGHT_PERMS.fleet.view],
          },
          {
            label: "Train Builder",
            href: "/dashboard/train-builder",
            icon: <Hammer />,
            permission: [FREIGHT_PERMS.trains.view, FREIGHT_PERMS.fleet.view],
          },

          // {
          //   label: "Wagon types",
          //   href: "/dashboard/wagon-types",
          //   icon: <Boxes />,
          // },
          {
            label: "Wagons",
            href: "/dashboard/wagons",
            icon: <Truck />,
            permission: [FREIGHT_PERMS.wagons.view, FREIGHT_PERMS.fleet.view],
          },
          {
            label: "Wagon Transfers",
            href: "/dashboard/wagon-transfers",
            icon: <ArrowLeftRight />,
            permission: [
              FREIGHT_PERMS.wagons.transferView,
              FREIGHT_PERMS.wagons.view,
            ],
          },
          {
            label: "Vehicles",
            href: "/dashboard/vehicles",
            icon: <Truck />,
            permission: FREIGHT_PERMS.vehicles.view,
          },
          {
            label: "Drivers",
            href: "/dashboard/drivers",
            icon: <Users />,
            permission: FREIGHT_PERMS.drivers.view,
          },
          {
            label: "Track Vehicles",
            href: "/dashboard/tracking",
            icon: <MapPin />,
            permission: FREIGHT_PERMS.tracking.view,
          },
          {
            label: "Fuel Purchases",
            href: "/dashboard/fuel-purchases",
            icon: <Truck />,
            permission: FREIGHT_PERMS.fuel.view,
          },
          {
            label: "Fuel Analytics",
            href: "/dashboard/fuel-stats",
            icon: <Truck />,
            permission: FREIGHT_PERMS.fuel.view,
          },
          {
            label: "Maintenance",
            href: "/dashboard/maintenance",
            icon: <Truck />,
            permission: FREIGHT_PERMS.maintenance.view,
          },
          {
            label: "Work Orders",
            href: "/dashboard/work-orders",
            icon: <SlidersHorizontal />,
            permission: FREIGHT_PERMS.maintenance.view,
          },
          {
            label: "Compliance & Alerts",
            href: "/dashboard/compliance",
            icon: <ShieldCheck />,
            permission: FREIGHT_PERMS.fleet.view,
          },
          {
            label: "Incidents",
            href: "/dashboard/incidents",
            icon: <FileText />,
            permission: FREIGHT_PERMS.fleet.view,
          },
          {
            label: "Procurement",
            href: "/dashboard/procurement",
            icon: <Package />,
            permission: FREIGHT_PERMS.fleet.view,
          },
          {
            label: "Financial Reports",
            href: "/dashboard/financial-reports",
            icon: <Wallet />,
            permission: FREIGHT_PERMS.fleetReports.view,
          },
          // {
          //   label: "Containers",
          //   href: "/dashboard/containers",
          //   icon: <Container />,
          // },
          // {
          //   label: "Cargoes",
          //   href: "/dashboard/cargoes",
          //   icon: <Package />,
          // },
        ],
      },
      {
        label: "Imports",
        href: "/dashboard/import-warehouse",
        icon: <PackageOpen />,
        permission: FREIGHT_PERMS.warehouseInventory.view,
        children: [
          {
            label: "Import Overview",
            href: "/dashboard/import-warehouse",
            icon: <PackageOpen />,
            permission: FREIGHT_PERMS.warehouseInventory.view,
          },
          {
            label: "Arrival Queue",
            href: "/dashboard/arrival-queue",
            icon: <PackageOpen />,
            permission: FREIGHT_PERMS.warehouseInventory.view,
          },
          {
            label: "Dispatch Queue",
            href: "/dashboard/dispatch-queue",
            icon: <Send />,
            permission: FREIGHT_PERMS.warehouseInventory.view,
          },
          {
            label: "Terminal Inventory",
            href: "/dashboard/warehouse-inventory?direction=IMPORT",
            icon: <Package />,
            permission: FREIGHT_PERMS.warehouseInventory.view,
          },
          {
            label: "Inventory Inquiry",
            href: "/dashboard/inventory-inquiry",
            icon: <Boxes />,
            permission: FREIGHT_PERMS.warehouseInventory.view,
          },
        ],
      },
      {
        label: "Exports",
        href: "/dashboard/export-warehouse",
        icon: <Truck />,
        permission: FREIGHT_PERMS.warehouseInventory.view,
        children: [
          {
            label: "Export Overview",
            href: "/dashboard/export-warehouse",
            icon: <Truck />,
            permission: FREIGHT_PERMS.warehouseInventory.view,
          },
          {
            label: "Loading Queue",
            href: "/dashboard/loading-queue",
            icon: <Truck />,
            permission: FREIGHT_PERMS.warehouseInventory.view,
          },
          {
            label: "Loaded Inventory",
            href: "/dashboard/loaded-inventory",
            icon: <PackageCheck />,
            permission: FREIGHT_PERMS.warehouseInventory.view,
          },
          {
            label: "Dispatch Queue",
            href: "/dashboard/dispatch-queue",
            icon: <Send />,
            permission: FREIGHT_PERMS.warehouseInventory.view,
          },
          {
            label: "Djibouti Unloading",
            href: "/dashboard/export-djibouti-unloading",
            icon: <PackageOpen />,
            permission: FREIGHT_PERMS.warehouseInventory.view,
          },
          {
            label: "Interchange Documents",
            href: "/dashboard/interchange-documents",
            icon: <FileText />,
            permission: FREIGHT_PERMS.interchangeDocuments.view,
          },
          {
            label: "Terminal Inventory",
            href: "/dashboard/warehouse-inventory?direction=EXPORT",
            icon: <Package />,
            permission: FREIGHT_PERMS.warehouseInventory.view,
          },
        ],
      },
      {
        label: "Intercity",
        href: "/dashboard/intercity",
        icon: <TrainFront />,
        permission: FREIGHT_PERMS.trainScheduling.view,
        children: [
          {
            label: "Intercity Cargo",
            href: "/dashboard/intercity",
            icon: <TrainFront />,
            permission: FREIGHT_PERMS.warehouseInventory.view,
          },
        ],
      },
      {
        label: "Warehouse Management",
        icon: <Container />,
        children: [
          {
            label: "Warehouse Dashboard",
            href: "/dashboard/warehouse-dashboard",
            icon: <LayoutDashboard />,
            permission: FREIGHT_PERMS.warehouseDashboard.view,
          },
          {
            // Yard-wide, not per-direction: the gate sees import and export
            // trucks at the same barrier.
            label: "Trucks on Site",
            href: "/dashboard/trucks-on-site",
            icon: <Truck />,
            permission: FREIGHT_PERMS.warehouseInventory.view,
          },
          {
            label: "Warehouses",
            href: "/dashboard/warehouses",
            icon: <Container />,
            permission: FREIGHT_PERMS.warehouses.view,
          },
          {
            label: "Allocation & Fees",
            href: "/dashboard/warehouse-rules",
            icon: <SlidersHorizontal />,
            permission: [
              FREIGHT_PERMS.warehouseAllocationRules.view,
              FREIGHT_PERMS.warehouseFeeRules.view,
            ],
          },
          {
            label: "Fee Invoices",
            href: "/dashboard/warehouse-fee-invoices",
            icon: <Wallet />,
            permission: FREIGHT_PERMS.warehouseFeeInvoices.view,
          },
        ],
      },
    ],
  },
  {
    title: "Freight configuration",
    mutedTitle: true,
    items: [
      {
        label: "File settings",
        href: "/dashboard/file-settings",
        icon: <Paperclip />,
        permission: FREIGHT_PERMS.admin,
      },
      {
        label: "Dropdown settings",
        href: "/dashboard/dropdown-settings",
        icon: <Settings />,
        permission: FREIGHT_PERMS.admin,
      },
      {
        label: "Contract templates",
        href: "/dashboard/contract-templates",
        icon: <ScrollText />,
        permission: FREIGHT_PERMS.admin,
      },
      {
        label: "Configuration",
        href: "/dashboard/configuration",
        icon: <Boxes />,
        children: [
          ...getCategorySidebarChildren("configuration"),
          {
            label: "Train scheduling rules",
            href: "/dashboard/configuration/train-scheduling-rules",
            permission: FREIGHT_PERMS.trainScheduling.rulesManage,
          },
        ],
      },
      {
        label: "Rules",
        href: "/dashboard/rules",
        icon: <SlidersHorizontal />,
        children: getCategorySidebarChildren("rules"),
      },

      {
        label: "Staff",
        href: "/user-management",
        icon: <Users />,
        permission: [
          FREIGHT_PERMS.admin,
          FREIGHT_PERMS.staff.roles.view,
          FREIGHT_PERMS.staff.employeeRegistration.view,
          FREIGHT_PERMS.staff.roleAssignment.view,
        ],
      },
    ],
  },
];

/** Hrefs of the two document-clearance menu items (stable identifiers). */
const ET_CLEARANCE_HREF = "/dashboard/contracts/clearance";
const DJ_CLEARANCE_HREF = "/dashboard/gl-djibouti/clearance";

// Routes a GL officer may reach beyond their clearance hub. Path B booking is
// part of their job (create/rebook under a cleared contract, then view that
// booking's clearance), but those routes live outside the clearance prefix —
// without this allowlist the single-prefix lock bounces them out of their own
// workflow. Matched against location.pathname (no query string).
const GL_WORKFLOW_PATH_PATTERNS: RegExp[] = [
  /^\/dashboard\/contracts\/[^/]+\/create-booking(\/|$)/,
  /^\/dashboard\/bookings\/[^/]+\/clearance(\/|$)/,
];

const isEtClearanceItem = (item: SidebarItem): boolean =>
  item.href === ET_CLEARANCE_HREF;
const isDjClearanceItem = (item: SidebarItem): boolean =>
  item.href === DJ_CLEARANCE_HREF;
const isClearanceItem = (item: SidebarItem): boolean =>
  isEtClearanceItem(item) || isDjClearanceItem(item);

/**
 * Keep only items the user is permitted to see; drop now-empty sections.
 *
 * Position-scoped visibility (super_admin sees everything):
 * - Super Admin → sees all items (all permissions pass, all tabs visible)
 * - Ethiopian GL  → sees ONLY the ET document-clearance page.
 * - Djibouti GL   → sees ONLY the DJ clearance page.
 * - Everyone else → sees everything they have permission for, EXCEPT the two
 *   clearance pages (those are GL-only).
 */
const filterSidebarByPermission = (
  sections: SidebarSection[],
  user: ReturnType<typeof useAuth>["user"],
): SidebarSection[] => {
  // Superadmin sees every section and item — no permission filtering.
  if (isSuperAdmin(user)) return sections;

  const etGl = isEthiopianGl(user);
  const djGl = isDjiboutiGl(user);

  const permissionAllowed = (item: SidebarItem): boolean => {
    if (!item.permission) return true;
    const keys = Array.isArray(item.permission)
      ? item.permission
      : [item.permission];
    return keys.some((key) => hasFreightPermission(user, key));
  };

  // Recursive: children are filtered first; a group (item with children) stays
  // only while it still has visible children — so parents without their own
  // permission key never leak a whole subtree the user cannot open.
  const filterItems = (items: SidebarItem[]): SidebarItem[] =>
    items
      .map((item) =>
        item.children
          ? { ...item, children: filterItems(item.children) }
          : item,
      )
      .filter((item) => {
        if (etGl || djGl) {
          // GL positions are locked to their single clearance page (parents
          // survive only as the path to that page).
          const isTarget = etGl ? isEtClearanceItem : isDjClearanceItem;
          return isTarget(item) || (item.children?.length ?? 0) > 0;
        }
        // Everyone else: hide the GL-only clearance pages entirely.
        if (isClearanceItem(item)) return false;
        if (!permissionAllowed(item)) return false;
        if (item.children) return item.children.length > 0;
        return true;
      });

  return sections
    .map((section) => ({
      ...section,
      items: filterItems(section.items),
    }))
    .filter((section) => section.items.length > 0);
};

const APP_TITLE = "EDR Freight Backoffice";

/** Flatten sidebar sections (incl. nested children) into {href, label} pairs. */
const flattenSidebarItems = (
  sections: SidebarSection[],
): { href: string; label: string }[] =>
  sections.flatMap((section) =>
    section.items.flatMap((item) => [
      ...(item.href ? [{ href: item.href, label: item.label }] : []),
      ...(item.children ?? [])
        .filter((child): child is SidebarItem & { href: string } =>
          Boolean(child.href),
        )
        .map((child) => ({ href: child.href, label: child.label })),
    ]),
  );

/** Find the sidebar label whose href matches (exactly or as a prefix of) the current path. */
const findActiveSidebarLabel = (
  pathname: string,
  sections: SidebarSection[],
): string | undefined => {
  const path = pathname.toLowerCase();
  const candidates = flattenSidebarItems(sections)
    .map(({ href, label }) => ({
      label,
      href: href.split("?")[0].toLowerCase(),
    }))
    .sort((a, b) => b.href.length - a.href.length);

  return candidates.find(
    ({ href }) => path === href || path.startsWith(`${href}/`),
  )?.label;
};

const DashboardShell = () => {
  const navigate = useNavigate();
  const location = useLocation();
  const { user, logout } = useAuth();

  const demoItems: SidebarItem[] = [];

  const sidebarSections = filterSidebarByPermission(
    buildSidebarSections(demoItems),
    user,
  );
  const displayName = user?.name?.en || user?.username || user?.email || "User";

  // GL positions are locked to their single clearance page: if they navigate
  // (or deep-link) anywhere else, send them back to their clearance hub.
  // Super admin is exempt. Allow the clearance path + its detail sub-routes.
  const superAdmin = isSuperAdmin(user);
  const glClearanceHome = !superAdmin
    ? isEthiopianGl(user)
      ? ET_CLEARANCE_HREF
      : isDjiboutiGl(user)
        ? DJ_CLEARANCE_HREF
        : null
    : null;

  useEffect(() => {
    const activeLabel = findActiveSidebarLabel(
      location.pathname,
      sidebarSections,
    );
    document.title = activeLabel ? `${activeLabel} | ${APP_TITLE}` : APP_TITLE;
  }, [location.pathname, sidebarSections]);

  if (
    glClearanceHome &&
    !location.pathname.startsWith(glClearanceHome) &&
    !GL_WORKFLOW_PATH_PATTERNS.some((re) => re.test(location.pathname))
  ) {
    return <Navigate to={glClearanceHome} replace />;
  }

  return (
    <FreightDashboardLayout
      sidebarSections={sidebarSections}
      // GL Ethiopia / GL Djibouti are locked to a single clearance page — no
      // sidebar (or mobile burger) at all; the page renders full width.
      hideSidebar={Boolean(glClearanceHome)}
      activeHref={location.pathname}
      onNavigate={navigate}
      enableThemeToggle
      userName={displayName}
      userEmail={user?.email}
      onLogout={logout}
    >
      <Outlet />
    </FreightDashboardLayout>
  );
};

const App = () => {
  const { user, loading } = useAuth();

  if (loading) {
    return <LoadingScreen />;
  }

  if (!user) {
    return (
      <Routes>
        <Route path="/auth" element={<LoginPage />} />
        <Route path="/forgot-password" element={<ForgotPasswordPage />} />
        {/* <Route path="/um/*" element={<UserManagementHostPage />} /> */}
        <Route path="um/set-password" element={<SetPassword />} />
        <Route path="/fayda/callback" element={<FaydaCallbackPage />} />
        <Route path="*" element={<Navigate to="/auth" replace />} />
      </Routes>
    );
  }

  return (
    <Routes>
      {UserManagementRoutes()}
      {/* <Route path="/um/*" element={<UserManagementHostPage />} /> */}
      <Route path="/health" element={<HealthCheck />} />
      <Route path="/callback" element={<FaydaCallbackPage />} />
      <Route path="/" element={<Navigate to="/dashboard/overview" replace />} />
      <Route
        path="/dashboard"
        element={<Navigate to="/dashboard/overview" replace />}
      />
      <Route path="/dashboard" element={<DashboardShell />}>
        <Route path="overview" element={<OverviewPage />} />
        {/* Dev/testing page for the mock AI booking assistant. */}
        <Route
          path="ai-booking-mock-test"
          element={<AiBookingMockTestPage />}
        />
        <Route path="profile" element={<MyProfilePage />} />

        <Route path="booking-requests" element={<BookingRequestsPage />} />
        <Route
          path="payments"
          element={
            <RequirePermission permission={FREIGHT_PERMS.bookings.view}>
              <PaymentsPage />
            </RequirePermission>
          }
        />
        <Route path="support" element={<SupportInboxPage />} />
        <Route
          path="customers"
          element={
            <RequirePermission permission={FREIGHT_PERMS.customers.view}>
              <CustomersPage />
            </RequirePermission>
          }
        />
        <Route
          path="customers/:id"
          element={
            <RequirePermission permission={FREIGHT_PERMS.customers.view}>
              <CustomerDetailPage />
            </RequirePermission>
          }
        />
        <Route
          path="invoices"
          element={
            <RequirePermission permission={FREIGHT_PERMS.bookings.view}>
              <InvoicesPage />
            </RequirePermission>
          }
        />
        <Route
          path="invoices/:id"
          element={
            <RequirePermission permission={FREIGHT_PERMS.bookings.view}>
              <InvoiceDetailPage />
            </RequirePermission>
          }
        />
        <Route path="booking-requests/new" element={<NewBookingPage />} />
        <Route
          path="booking-requests/:id"
          element={<BookingRequestDetailPage />}
        />
        <Route
          path="booking-requests/:id/contract"
          element={<BookingContractPage />}
        />
        {/* Legacy booking-based clearance URLs → the contract clearance hub. */}
        <Route
          path="clearance"
          element={<Navigate to="/dashboard/contracts/clearance" replace />}
        />
        <Route
          path="clearance/:id"
          element={
            <RequirePermission
              permission={FREIGHT_PERMS.bookings.clearanceView}
            >
              <DocumentClearanceDetailPage />
            </RequirePermission>
          }
        />

        {/* Contracts (Path A/B) */}
        <Route
          path="contract-requests"
          element={
            <RequirePermission permission={FREIGHT_PERMS.contracts.view}>
              <ContractRequestsPage />
            </RequirePermission>
          }
        />
        <Route
          path="contract-requests/:id"
          element={
            <RequirePermission permission={FREIGHT_PERMS.contracts.view}>
              <ContractRequestDetailPage />
            </RequirePermission>
          }
        />
        <Route
          path="contract-requests/:id/view"
          element={
            <RequirePermission permission={FREIGHT_PERMS.contracts.view}>
              <ContractViewPage />
            </RequirePermission>
          }
        />
        <Route
          path="bookings/:bookingId/clearance"
          element={
            <RequirePermission
              permission={FREIGHT_PERMS.bookings.clearanceView}
            >
              <DocumentClearanceDetailPage />
            </RequirePermission>
          }
        />
        <Route
          path="shipment-requests"
          element={
            <RequirePermission
              permission={FREIGHT_PERMS.contracts.createBooking}
            >
              <ShipmentRequestsPage />
            </RequirePermission>
          }
        />
        <Route
          path="shipment-requests/:id"
          element={
            <RequirePermission
              permission={FREIGHT_PERMS.contracts.createBooking}
            >
              <ShipmentRequestDetailPage />
            </RequirePermission>
          }
        />
        {/* Operations hub: clearance documents for non-customs contracts —
            Contracts tab (contract-level) + General tab (per-booking). */}
        <Route
          path="contracts/clearance-documents"
          element={
            <RequirePermission
              permission={FREIGHT_PERMS.contracts.opsClearanceReview}
            >
              <ClearanceDocumentsPage />
            </RequirePermission>
          }
        />
        <Route
          path="contracts/clearance-documents/:id"
          element={
            <RequirePermission
              permission={FREIGHT_PERMS.contracts.opsClearanceReview}
            >
              <ContractClearanceDetailPage />
            </RequirePermission>
          }
        />
        {/* GL (Path B) contract clearance review hub */}
        <Route
          path="contracts/clearance"
          element={
            <RequirePermission
              permission={[
                FREIGHT_PERMS.contracts.clearanceReview,
                FREIGHT_PERMS.contracts.clearanceEtActions,
              ]}
            >
              <ContractClearanceListPage />
            </RequirePermission>
          }
        />
        <Route
          path="contracts/clearance/:id"
          element={
            <RequirePermission
              permission={[
                FREIGHT_PERMS.contracts.clearanceReview,
                FREIGHT_PERMS.contracts.clearanceEtActions,
              ]}
            >
              <ContractClearanceDetailPage />
            </RequirePermission>
          }
        />
        <Route
          path="gl-ethiopia/clearance"
          element={<LegacyGlEthiopiaClearanceRedirect />}
        />
        <Route
          path="gl-ethiopia/clearance/:id"
          element={<LegacyGlEthiopiaClearanceRedirect />}
        />
        <Route
          path="gl-djibouti/clearance"
          element={
            <RequirePermission
              permission={FREIGHT_PERMS.contracts.clearanceDjActions}
            >
              <GlDjiboutiClearanceListPage />
            </RequirePermission>
          }
        />
        <Route
          path="gl-djibouti/clearance/:id"
          element={
            <RequirePermission
              permission={FREIGHT_PERMS.contracts.clearanceDjActions}
            >
              <GlClearanceDetailPage />
            </RequirePermission>
          }
        />
        {/* Path A — Operations reviews per-booking self-clearance documents
            (GENERAL contracts without customs). */}
        <Route
          path="contracts/ops-clearance"
          element={
            <RequirePermission
              permission={FREIGHT_PERMS.contracts.opsClearanceReview}
            >
              <DocumentClearanceListPage opsMode />
            </RequirePermission>
          }
        />
        <Route
          path="contracts/:id/create-booking"
          element={
            <RequirePermission
              permission={FREIGHT_PERMS.contracts.createBooking}
            >
              <GlCreateBookingForm />
            </RequirePermission>
          }
        />
        {/* Completion of an initiated (bare) instance after per-booking
            clearance — same form, submits to the complete endpoint. */}
        <Route
          path="contracts/:id/bookings/:bookingId/complete"
          element={
            <RequirePermission
              permission={FREIGHT_PERMS.contracts.createBooking}
            >
              <GlCreateBookingForm />
            </RequirePermission>
          }
        />
        <Route
          path="bookings/:id/milestones"
          element={<BookingMilestonesRedirect />}
        />
        <Route path="warehouses" element={<WarehouseListPage />} />
        <Route path="warehouses/:id" element={<WarehouseDetailPage />} />
        <Route
          path="warehouse-inventory"
          element={<WarehouseInventoryPage />}
        />
        <Route path="import-warehouse" element={<ImportWarehouseFlowPage />} />
        <Route path="export-warehouse" element={<ExportWarehouseFlowPage />} />
        <Route path="arrival-queue" element={<ArrivalQueuePage />} />
        <Route path="loading-queue" element={<LoadingQueuePage />} />
        <Route path="intercity" element={<IntercityPage />} />
        <Route path="trucks-on-site" element={<TrucksOnSitePage />} />
        <Route path="loaded-inventory" element={<LoadedInventoryPage />} />
        <Route path="dispatch-queue" element={<DispatchQueuePage />} />
        <Route
          path="export-djibouti-unloading"
          element={<ExportDjiboutiUnloadingQueuePage />}
        />
        <Route
          path="interchange-documents"
          element={<InterchangeDocumentsPage />}
        />
        <Route path="inventory-inquiry" element={<InventoryInquiryPage />} />
        <Route path="warehouse-rules" element={<WarehouseRulesPage />} />
        <Route
          path="warehouse-fee-invoices"
          element={<WarehouseInvoicesPage />}
        />
        <Route
          path="warehouse-dashboard"
          element={<WarehouseDashboardPage />}
        />

        <Route
          path="operations/train-scheduling"
          element={
            <Navigate to="/dashboard/operations/train-scheduling-v2" replace />
          }
        />
        <Route
          path="operations/batch-board"
          element={
            <RequirePermission permission={FREIGHT_PERMS.trainScheduling.view}>
              <BatchBoardPage />
            </RequirePermission>
          }
        />
        <Route
          path="operations/first-mile"
          element={
            <RequirePermission permission={FREIGHT_PERMS.firstMile.view}>
              <FirstMilePage />
            </RequirePermission>
          }
        />
        <Route
          path="operations/last-mile"
          element={
            <RequirePermission permission={FREIGHT_PERMS.lastMile.view}>
              <LastMilePage />
            </RequirePermission>
          }
        />
        <Route
          path="operations/batch-board/:scheduleId"
          element={
            <RequirePermission permission={FREIGHT_PERMS.trainScheduling.view}>
              <BatchScheduleDetailPage />
            </RequirePermission>
          }
        />
        <Route
          path="operations/train-scheduling-v2"
          element={
            <RequirePermission permission={FREIGHT_PERMS.trainScheduling.view}>
              <TrainScheduleV2ListPage />
            </RequirePermission>
          }
        />
        <Route
          path="operations/train-scheduling-v2/:scheduleId"
          element={
            <RequirePermission permission={FREIGHT_PERMS.trainScheduling.view}>
              <TrainScheduleV2DetailPage />
            </RequirePermission>
          }
        />
        <Route
          path="operations/train-scheduling-v2/:scheduleId/track"
          element={
            <RequirePermission permission={FREIGHT_PERMS.trainScheduling.view}>
              <TrainScheduleTrackPage />
            </RequirePermission>
          }
        />
        <Route
          path="routes"
          element={
            <RequirePermission permission={[FREIGHT_PERMS.routes.view, FREIGHT_PERMS.fleet.view]}>
              <RoutesPage />
            </RequirePermission>
          }
        />
        <Route
          path="locomotives"
          element={
            <RequirePermission permission={[FREIGHT_PERMS.locomotives.view, FREIGHT_PERMS.fleet.view]}>
              <FleetResourcePage />
            </RequirePermission>
          }
        />
        <Route
          path="trains"
          element={
            <RequirePermission permission={[FREIGHT_PERMS.trains.view, FREIGHT_PERMS.fleet.view]}>
              <FleetResourcePage />
            </RequirePermission>
          }
        />
        <Route
          path="trains/:id"
          element={
            <RequirePermission permission={[FREIGHT_PERMS.trains.view, FREIGHT_PERMS.fleet.view]}>
              <TrainDetailPage />
            </RequirePermission>
          }
        />
        <Route
          path="train-builder"
          element={
            <RequirePermission permission={[FREIGHT_PERMS.trains.view, FREIGHT_PERMS.fleet.view]}>
              <TrainBuilderListPage />
            </RequirePermission>
          }
        />
        <Route
          path="train-builder/:id"
          element={
            <RequirePermission permission={[FREIGHT_PERMS.trains.view, FREIGHT_PERMS.fleet.view]}>
              <TrainBuilderDetailPage />
            </RequirePermission>
          }
        />
        <Route
          path="wagons"
          element={
            <RequirePermission permission={[FREIGHT_PERMS.wagons.view, FREIGHT_PERMS.fleet.view]}>
              <FleetResourcePage />
            </RequirePermission>
          }
        />
        <Route
          path="wagon-transfers"
          element={
            <RequirePermission
              permission={[
                FREIGHT_PERMS.wagons.transferView,
                FREIGHT_PERMS.wagons.view,
              ]}
            >
              <WagonTransfersPage />
            </RequirePermission>
          }
        />
        <Route
          path="containers"
          element={
            <RequirePermission permission={[FREIGHT_PERMS.containers.view, FREIGHT_PERMS.fleet.view]}>
              <FleetResourcePage />
            </RequirePermission>
          }
        />
        <Route
          path="cargoes"
          element={
            <RequirePermission permission={[FREIGHT_PERMS.cargoes.view, FREIGHT_PERMS.fleet.view]}>
              <FleetResourcePage />
            </RequirePermission>
          }
        />
        <Route
          path="vehicles"
          element={
            <RequirePermission permission={FREIGHT_PERMS.vehicles.view}>
              <FleetResourcePage />
            </RequirePermission>
          }
        />
        <Route
          path="vehicles/:id"
          element={
            <RequirePermission permission={FREIGHT_PERMS.vehicles.view}>
              <VehicleDetailPage />
            </RequirePermission>
          }
        />
        <Route
          path="drivers"
          element={
            <RequirePermission permission={FREIGHT_PERMS.drivers.view}>
              <FleetResourcePage />
            </RequirePermission>
          }
        />
        <Route
          path="drivers/:id"
          element={
            <RequirePermission permission={FREIGHT_PERMS.drivers.view}>
              <DriverDetailPage />
            </RequirePermission>
          }
        />
        <Route
          path="operations/train-scheduling"
          element={
            <Navigate to="/dashboard/operations/train-scheduling-v2" replace />
          }
        />
        <Route
          path="operations/batch-board"
          element={
            <RequirePermission permission={FREIGHT_PERMS.trainScheduling.view}>
              <BatchBoardPage />
            </RequirePermission>
          }
        />
        <Route
          path="operations/batch-board/:scheduleId"
          element={
            <RequirePermission permission={FREIGHT_PERMS.trainScheduling.view}>
              <BatchScheduleDetailPage />
            </RequirePermission>
          }
        />
        <Route
          path="operations/train-scheduling-v2"
          element={
            <RequirePermission permission={FREIGHT_PERMS.trainScheduling.view}>
              <TrainScheduleV2ListPage />
            </RequirePermission>
          }
        />
        <Route
          path="operations/train-scheduling-v2/:scheduleId"
          element={
            <RequirePermission permission={FREIGHT_PERMS.trainScheduling.view}>
              <TrainScheduleV2DetailPage />
            </RequirePermission>
          }
        />
        <Route
          path="operations/train-scheduling-v2/:scheduleId/track"
          element={
            <RequirePermission permission={FREIGHT_PERMS.trainScheduling.view}>
              <TrainScheduleTrackPage />
            </RequirePermission>
          }
        />
        <Route
          path="routes"
          element={
            <RequirePermission permission={[FREIGHT_PERMS.routes.view, FREIGHT_PERMS.fleet.view]}>
              <RoutesPage />
            </RequirePermission>
          }
        />
        <Route
          path="fuel-purchases"
          element={
            <RequirePermission permission={FREIGHT_PERMS.fuel.view}>
              <FuelPurchasePage />
            </RequirePermission>
          }
        />
        <Route
          path="fuel-stats"
          element={
            <RequirePermission permission={FREIGHT_PERMS.fuel.view}>
              <FuelStatsPage />
            </RequirePermission>
          }
        />
        <Route
          path="maintenance"
          element={
            <RequirePermission permission={FREIGHT_PERMS.maintenance.view}>
              <MaintenancePage />
            </RequirePermission>
          }
        />
        <Route
          path="financial-reports"
          element={
            <RequirePermission permission={FREIGHT_PERMS.fleetReports.view}>
              <FinancialReportsPage />
            </RequirePermission>
          }
        />
        <Route
          path="fleet-dashboard"
          element={
            <RequirePermission permission={FREIGHT_PERMS.fleetDashboard.view}>
              <FleetDashboard />
            </RequirePermission>
          }
        />
        <Route
          path="tracking"
          element={
            <RequirePermission permission={FREIGHT_PERMS.tracking.view}>
              <TrackingPage />
            </RequirePermission>
          }
        />
        <Route
          path="compliance"
          element={
            <RequirePermission permission={FREIGHT_PERMS.fleet.view}>
              <CompliancePage />
            </RequirePermission>
          }
        />
        <Route
          path="incidents"
          element={
            <RequirePermission permission={FREIGHT_PERMS.fleet.view}>
              <IncidentsPage />
            </RequirePermission>
          }
        />
        <Route
          path="work-orders"
          element={
            <RequirePermission permission={FREIGHT_PERMS.maintenance.view}>
              <WorkOrdersPage />
            </RequirePermission>
          }
        />
        <Route
          path="procurement"
          element={
            <RequirePermission permission={FREIGHT_PERMS.fleet.view}>
              <ProcurementPage />
            </RequirePermission>
          }
        />
        <Route
          path="locomotives"
          element={
            <RequirePermission permission={[FREIGHT_PERMS.locomotives.view, FREIGHT_PERMS.fleet.view]}>
              <FleetResourcePage />
            </RequirePermission>
          }
        />
        <Route
          path="trains"
          element={
            <RequirePermission permission={[FREIGHT_PERMS.trains.view, FREIGHT_PERMS.fleet.view]}>
              <FleetResourcePage />
            </RequirePermission>
          }
        />
        <Route
          path="trains/:id"
          element={
            <RequirePermission permission={[FREIGHT_PERMS.trains.view, FREIGHT_PERMS.fleet.view]}>
              <TrainDetailPage />
            </RequirePermission>
          }
        />
        <Route
          path="train-builder"
          element={
            <RequirePermission permission={[FREIGHT_PERMS.trains.view, FREIGHT_PERMS.fleet.view]}>
              <TrainBuilderListPage />
            </RequirePermission>
          }
        />
        <Route
          path="train-builder/:id"
          element={
            <RequirePermission permission={[FREIGHT_PERMS.trains.view, FREIGHT_PERMS.fleet.view]}>
              <TrainBuilderDetailPage />
            </RequirePermission>
          }
        />
        <Route
          path="wagons"
          element={
            <RequirePermission permission={[FREIGHT_PERMS.wagons.view, FREIGHT_PERMS.fleet.view]}>
              <FleetResourcePage />
            </RequirePermission>
          }
        />
        <Route
          path="wagon-transfers"
          element={
            <RequirePermission
              permission={[
                FREIGHT_PERMS.wagons.transferView,
                FREIGHT_PERMS.wagons.view,
              ]}
            >
              <WagonTransfersPage />
            </RequirePermission>
          }
        />
        <Route
          path="containers"
          element={
            <RequirePermission permission={[FREIGHT_PERMS.containers.view, FREIGHT_PERMS.fleet.view]}>
              <FleetResourcePage />
            </RequirePermission>
          }
        />
        <Route
          path="cargoes"
          element={
            <RequirePermission permission={[FREIGHT_PERMS.cargoes.view, FREIGHT_PERMS.fleet.view]}>
              <FleetResourcePage />
            </RequirePermission>
          }
        />

        {/* Legacy embedded user management routes */}
        {/* <Route path="user-management" element={<UserManagementPage />} />
        <Route path="user-management/users" element={<UsersPage />} />
        <Route
          path="user-management/position-types"
          element={<PositionTypesPage />}
        /> */}
        {/* <Route path="user-management/employees" element={<EmployeesPage />} /> */}
        {/* <Route
          path="user-management/permissions"
          element={<PermissionsPage />}
        />
        <Route path="user-management/roles" element={<RolesPage />} /> */}

        <Route
          path="file-settings"
          element={
            <RequirePermission permission={FREIGHT_PERMS.admin}>
              <FileUploadSettingsPage />
            </RequirePermission>
          }
        />
        <Route
          path="dropdown-settings"
          element={
            <RequirePermission permission={FREIGHT_PERMS.admin}>
              <DropdownSettingsPage />
            </RequirePermission>
          }
        />
        <Route
          path="contract-templates"
          element={
            <RequirePermission permission={FREIGHT_PERMS.admin}>
              <ContractTemplatesPage />
            </RequirePermission>
          }
        />
        <Route
          path="contract-templates/:code"
          element={
            <RequirePermission permission={FREIGHT_PERMS.admin}>
              <ContractTemplateEditorPage />
            </RequirePermission>
          }
        />

        <Route
          path="configuration"
          element={
            <Navigate to="/dashboard/configuration/cargo-types" replace />
          }
        />
        <Route
          path="configuration/train-scheduling-rules"
          element={
            <RequirePermission permission={FREIGHT_PERMS.trainScheduling.view}>
              <TrainSchedulingGlobalRulesPage />
            </RequirePermission>
          }
        />
        {/* <Route
          path="configuration/contract-validity-periods"
          element={
            <RequirePermission permission={FREIGHT_PERMS.admin}>
              <ContractValidityPeriodsPage />
            </RequirePermission>
          }
        /> */}
        <Route path="configuration/cargo-types" element={<CargoTypesPage />} />
        <Route
          path="configuration/cargo-types/:id"
          element={<CargoTypesPage />}
        />
        <Route
          path="configuration/:resource"
          element={<RuleEngineResourcePage />}
        />

        <Route
          path="rules"
          element={<Navigate to="/dashboard/rules/priority-configs" replace />}
        />
        <Route path="rules/:resource" element={<RuleEngineResourcePage />} />

        <Route
          path="rule-engine"
          element={
            <Navigate to="/dashboard/configuration/cargo-types" replace />
          }
        />
        <Route
          path="rule-engine/:resource"
          element={<RuleEngineLegacyRedirect />}
        />
        <Route path="org-structure" element={<Navigate to="/um" replace />} />
        <Route path="org-structure/*" element={<Navigate to="/um" replace />} />
      </Route>

      <Route path="*" element={<Navigate to="/dashboard/overview" replace />} />
    </Routes>
  );
};

/** Redirect removed milestones page to document clearance. */
function BookingMilestonesRedirect() {
  const { id } = useParams();
  return <Navigate to={`/dashboard/bookings/${id}/clearance`} replace />;
}

/** Redirect legacy GL Ethiopia clearance URLs to the unified document clearance hub. */
function LegacyGlEthiopiaClearanceRedirect() {
  const { id } = useParams();
  if (id) {
    return <Navigate to={`/dashboard/contracts/clearance/${id}`} replace />;
  }
  return <Navigate to="/dashboard/contracts/clearance" replace />;
}

export default App;
