import { Suspense, type ReactNode } from "react";
import { createBrowserRouter, createRoutesFromElements, Navigate, Outlet, Route } from "react-router-dom";
import { AuthProvider } from "../auth/AuthContext";
import { getManagementRoutePermissions } from "../features/navigation/managementRoutes";
import { RoutePageFallback } from "../components/common/RoutePageFallback";
import { UnsavedChangesProvider } from "../components/common/UnsavedChangesGuard";
import { AppShellLayout } from "../layouts/AppShellLayout";
import { AuthLayout } from "../layouts/AuthLayout";
import { BudgetsPage } from "../pages/BudgetsPage";
import { ChangePasswordPage } from "../pages/ChangePasswordPage";
import { DashboardPage } from "../pages/DashboardPage";
import { ForbiddenPage } from "../pages/ForbiddenPage";
import { ForgotPasswordPage } from "../pages/ForgotPasswordPage";
import { LoginPage } from "../pages/LoginPage";
import { NotFoundPage } from "../pages/NotFoundPage";
import { ProfilePage } from "../pages/ProfilePage";
import {
  ApOperationsPage,
  ApprovalRulesPage,
  AnnouncementsPage,
  AttendancePage,
  AssetCreatePage,
  AssetDetailPage,
  AssetRegistryPage,
  AuditLogsPage,
  CutoverConsolePage,
  EmployeeProfilePage,
  DelegationsPage,
  DepartmentsPage,
  ExpenseStandardsPage,
  FeatureFlagsPage,
  InventoryChecksPage,
  InvoicePoolPage,
  LeaveRequestPage,
  MasterDataPage,
  MobileApprovalsPage,
  MobileAssetScanPage,
  MobileCapturePage,
  MobileLeavePage,
  MobileMePage,
  MobileNotificationsPage,
  MobilePortalPage,
  MobileProfilePage,
  MobilePurchaseRequestDetailPage,
  MobilePurchaseRequestsPage,
  MobileReimbursementDetailPage,
  MobileReimbursementsPage,
  NotificationChannelsPage,
  NotificationsPage,
  OrganizationPage,
  PayrollPage,
  PerformancePage,
  PaymentBatchesPage,
  PaymentAccountsPage,
  PeoplePage,
  PeopleStatsPage,
  PortalAnnouncementsPage,
  PortalHomePage,
  ProjectsPage,
  ProjectDetailPage,
  ContractsRegistryPage,
  ContractRegistryCreatePage,
  ContractRegistryDetailPage,
  SystemSettingsPage,
  TeamPresencePage,
  TodosPage,
  PurchaseRequestsPage,
  PurchaseRequestDetailPage,
  ReimbursementDetailPage,
  ReimbursementDashboardPage,
  ReimbursementPrintPage,
  ReimbursementTemplatesPage,
  ReimbursementsPage,
  TravelRequestsPage,
  UserManagementPage,
  WecomApprovalArchivePage,
  WeeklyReportsPage,
  WorkspaceSetupPage,
  WorkflowDefinitionsPage,
  WorkflowTaskDetailPage,
  WorkflowTasksPage,
} from "./lazy";
import { GuestOnly, RequireAuth, RequireBusinessApprover, RequirePermission } from "./guards";

function withRouteFallback(node: ReactNode) {
  return <Suspense fallback={<RoutePageFallback />}>{node}</Suspense>;
}

function RouterRoot() {
  return (
    <UnsavedChangesProvider>
      <AuthProvider>
        <Outlet />
      </AuthProvider>
    </UnsavedChangesProvider>
  );
}

const routeElements = (
  <Route element={<RouterRoot />}>
      <Route
        path="/login"
        element={
          <GuestOnly>
            <AuthLayout variant="login" />
          </GuestOnly>
        }
      >
        <Route index element={<LoginPage />} />
      </Route>

      <Route
        path="/forgot-password"
        element={
          <GuestOnly>
            <AuthLayout />
          </GuestOnly>
        }
      >
        <Route index element={<ForgotPasswordPage />} />
      </Route>

      <Route
        path="/change-password"
        element={
          <RequireAuth>
            <AuthLayout />
          </RequireAuth>
        }
      >
        <Route index element={<ChangePasswordPage />} />
      </Route>

      <Route
        path="/"
        element={
          <RequireAuth>
            <AppShellLayout />
          </RequireAuth>
        }
      >
        <Route index element={<Navigate to="/portal" replace />} />
        <Route path="portal" element={withRouteFallback(<PortalHomePage />)} />
        <Route path="announcements" element={withRouteFallback(<AnnouncementsPage />)} />
        <Route path="team" element={withRouteFallback(<TeamPresencePage />)} />
        <Route
          path="projects"
          element={
            <RequirePermission anyOf={["project.view_own", "project.view_all", "project.manage", "system.settings"]}>
              {withRouteFallback(<ProjectsPage />)}
            </RequirePermission>
          }
        />
        <Route
          path="projects/:projectId"
          element={
            <RequirePermission anyOf={["project.view_own", "project.view_all", "project.manage", "system.settings"]}>
              {withRouteFallback(<ProjectDetailPage />)}
            </RequirePermission>
          }
        />
        <Route
          path="contracts-registry"
          element={
            <RequirePermission anyOf={["project.view_own", "project.view_all", "project.manage", "system.settings"]}>
              {withRouteFallback(<ContractsRegistryPage />)}
            </RequirePermission>
          }
        />
        <Route
          path="contracts-registry/new"
          element={
            <RequirePermission anyOf={["project.view_all", "project.manage", "system.settings"]}>
              {withRouteFallback(<ContractRegistryCreatePage />)}
            </RequirePermission>
          }
        />
        <Route
          path="contracts-registry/:contractId"
          element={
            <RequirePermission anyOf={["project.view_own", "project.view_all", "project.manage", "system.settings"]}>
              {withRouteFallback(<ContractRegistryDetailPage />)}
            </RequirePermission>
          }
        />
        <Route path="weekly-reports" element={withRouteFallback(<WeeklyReportsPage />)} />
        <Route path="todos" element={withRouteFallback(<TodosPage />)} />
        <Route path="dashboard" element={<DashboardPage />} />

        <Route
          path="budgets"
          element={
            <RequirePermission anyOf={["budget.view", "budget.manage"]}>
              <BudgetsPage />
            </RequirePermission>
          }
        />

        <Route
          path="attendance"
          element={withRouteFallback(<AttendancePage />)}
        />

        <Route
          path="wecom-approval-archive"
          element={
            <RequirePermission anyOf={["leave.view_own", "attendance.view_own", "leave.view_all", "attendance.view_all", "*"]}>
              {withRouteFallback(<WecomApprovalArchivePage />)}
            </RequirePermission>
          }
        />

        <Route
          path="reimbursements"
          element={
            <RequirePermission anyOf={["expense.view_own", "expense.view_all"]}>
              {withRouteFallback(<ReimbursementsPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="reimbursements/dashboard"
          element={
            <RequirePermission anyOf={["expense.view_all"]}>
              {withRouteFallback(<ReimbursementDashboardPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="system/reimbursement-templates"
          element={
            <RequirePermission anyOf={getManagementRoutePermissions("reimbursement_templates")}>
              {withRouteFallback(<ReimbursementTemplatesPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="reimbursements/:reimbursementId"
          element={
            <RequirePermission anyOf={["expense.view_own", "expense.view_all"]}>
              {withRouteFallback(<ReimbursementDetailPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="reimbursements/:reimbursementId/print"
          element={
            <RequirePermission anyOf={["expense.view_own", "expense.view_all"]}>
              {withRouteFallback(<ReimbursementPrintPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="leave-requests"
          element={
            <RequirePermission anyOf={["leave.view_own", "leave.view_all"]}>
              {withRouteFallback(<LeaveRequestPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="purchase-requests"
          element={
            <RequirePermission
              anyOf={["procurement.create", "procurement.view_own", "procurement.view_all", "procurement.manage"]}
            >
              {withRouteFallback(<PurchaseRequestsPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="purchase-requests/:purchaseRequestId"
          element={
            <RequirePermission anyOf={["procurement.create", "procurement.view_own", "procurement.view_all", "procurement.manage"]}>
              {withRouteFallback(<PurchaseRequestDetailPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="travel-requests"
          element={
            <RequirePermission
              anyOf={[
                "travel.create",
                "travel.view_own",
                "travel.view_all",
                "travel.manage",
                "travel.payment.manage",
                "integration.manage",
              ]}
            >
              {withRouteFallback(<TravelRequestsPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="payment-batches"
          element={
            <RequirePermission anyOf={["payment.batch.manage", "risk.review.manage", "payment.batch.review"]}>
              {withRouteFallback(<PaymentBatchesPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="ap-operations"
          element={
            <RequirePermission anyOf={["payment.batch.manage", "risk.review.manage", "payment.batch.review"]}>
              {withRouteFallback(<ApOperationsPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="assets"
          element={
            <RequirePermission
              anyOf={["asset.view_own", "asset.view_all", "asset.manage", "asset.transfer", "asset.inventory"]}
            >
              {withRouteFallback(<AssetRegistryPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="assets/new"
          element={
            <RequirePermission anyOf={["asset.manage"]}>
              {withRouteFallback(<AssetCreatePage />)}
            </RequirePermission>
          }
        />

        <Route
          path="assets/:assetId"
          element={
            <RequirePermission
              anyOf={["asset.view_own", "asset.view_all", "asset.manage", "asset.transfer", "asset.inventory"]}
            >
              {withRouteFallback(<AssetDetailPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="inventory-checks"
          element={
            <RequirePermission anyOf={["asset.inventory"]}>
              {withRouteFallback(<InventoryChecksPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="workflow/tasks"
          element={
            <RequireBusinessApprover>
              {withRouteFallback(<WorkflowTasksPage />)}
            </RequireBusinessApprover>
          }
        />

        <Route
          path="workflow/tasks/:taskId"
          element={
            <RequireBusinessApprover>
              {withRouteFallback(<WorkflowTaskDetailPage />)}
            </RequireBusinessApprover>
          }
        />

        <Route
          path="invoice-pool"
          element={
            <RequirePermission anyOf={["invoice.upload", "invoice.view_own", "invoice.manage"]}>
              {withRouteFallback(<InvoicePoolPage />)}
            </RequirePermission>
          }
        />

        <Route path="mobile" element={withRouteFallback(<MobilePortalPage />)} />

        <Route
          path="mobile/attendance"
          element={
            <RequirePermission anyOf={["attendance.view_own", "attendance.view_all", "*"]}>
              {withRouteFallback(<AttendancePage />)}
            </RequirePermission>
          }
        />

        <Route path="mobile/me" element={withRouteFallback(<MobileMePage />)} />

        <Route path="mobile/profile" element={withRouteFallback(<MobileProfilePage />)} />

        <Route path="mobile/notifications" element={withRouteFallback(<MobileNotificationsPage />)} />

        <Route
          path="mobile/payment-batches"
          element={
            <RequirePermission anyOf={["payment.batch.manage", "risk.review.manage", "payment.batch.review"]}>
              {withRouteFallback(<PaymentBatchesPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="mobile/wecom-approval-archive"
          element={
            <RequirePermission anyOf={["leave.view_own", "attendance.view_own", "leave.view_all", "attendance.view_all", "*"]}>
              {withRouteFallback(<WecomApprovalArchivePage />)}
            </RequirePermission>
          }
        />

        <Route
          path="mobile/capture"
          element={
            <RequirePermission anyOf={["invoice.upload", "invoice.manage"]}>
              {withRouteFallback(<MobileCapturePage />)}
            </RequirePermission>
          }
        />

        <Route
          path="mobile/reimbursements"
          element={
            <RequirePermission anyOf={["expense.view_own", "expense.view_all"]}>
              {withRouteFallback(<MobileReimbursementsPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="mobile/reimbursements/:reimbursementId"
          element={
            <RequirePermission anyOf={["expense.view_own", "expense.view_all"]}>
              {withRouteFallback(<MobileReimbursementDetailPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="mobile/leave"
          element={
            <RequirePermission anyOf={["leave.view_own", "leave.view_all"]}>
              {withRouteFallback(<MobileLeavePage />)}
            </RequirePermission>
          }
        />

        <Route
          path="mobile/leave/:leaveRequestId"
          element={
            <RequirePermission anyOf={["leave.view_own", "leave.view_all"]}>
              {withRouteFallback(<MobileLeavePage />)}
            </RequirePermission>
          }
        />

        <Route
          path="mobile/purchase-requests"
          element={
            <RequirePermission
              anyOf={["procurement.create", "procurement.view_own", "procurement.view_all", "procurement.manage"]}
            >
              {withRouteFallback(<MobilePurchaseRequestsPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="mobile/purchase-requests/:purchaseRequestId"
          element={
            <RequirePermission
              anyOf={["procurement.create", "procurement.view_own", "procurement.view_all", "procurement.manage"]}
            >
              {withRouteFallback(<MobilePurchaseRequestDetailPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="mobile/assets/scan"
          element={
            <RequirePermission
              anyOf={["asset.view_own", "asset.view_all", "asset.manage", "asset.transfer", "asset.inventory"]}
            >
              {withRouteFallback(<MobileAssetScanPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="mobile/approvals"
          element={
            <RequirePermission
              anyOf={[
                "expense.view_own",
                "leave.view_own",
                "procurement.view_own",
                "travel.view_own",
                "expense.approve",
                "leave.approve",
                "procurement.approve",
                "travel.approve",
              ]}
            >
              {withRouteFallback(<MobileApprovalsPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="mobile/approvals/:taskId"
          element={
            <RequirePermission
              anyOf={[
                "expense.view_own",
                "leave.view_own",
                "procurement.view_own",
                "travel.view_own",
                "expense.approve",
                "leave.approve",
                "procurement.approve",
                "travel.approve",
              ]}
            >
              {withRouteFallback(<MobileApprovalsPage />)}
            </RequirePermission>
          }
        />

        <Route path="notifications" element={withRouteFallback(<NotificationsPage />)} />

        <Route
          path="audit-logs"
          element={
            <RequirePermission anyOf={getManagementRoutePermissions("audit_logs")}>
              {withRouteFallback(<AuditLogsPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="delegations"
          element={
            <RequirePermission anyOf={["expense.proxy_manage"]}>
              {withRouteFallback(<DelegationsPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="payroll"
          element={
            <RequirePermission anyOf={["payroll.manage"]}>
              {withRouteFallback(<PayrollPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="performance"
          element={
            <RequirePermission anyOf={getManagementRoutePermissions("performance")}>
              {withRouteFallback(<PerformancePage />)}
            </RequirePermission>
          }
        />

        <Route
          path="organization"
          element={
            <RequirePermission anyOf={getManagementRoutePermissions("organization")}>
              {withRouteFallback(<OrganizationPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="people"
          element={
            <RequirePermission anyOf={getManagementRoutePermissions("people")}>
              {withRouteFallback(<PeoplePage />)}
            </RequirePermission>
          }
        />

        <Route
          path="people/stats"
          element={
            <RequirePermission anyOf={getManagementRoutePermissions("people_stats")}>
              {withRouteFallback(<PeopleStatsPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="people/:employeeId"
          element={
            <RequirePermission anyOf={getManagementRoutePermissions("employee_profile")}>
              {withRouteFallback(<EmployeeProfilePage />)}
            </RequirePermission>
          }
        />

        <Route
          path="system/users"
          element={
            <RequirePermission anyOf={getManagementRoutePermissions("user_accounts")}>
              {withRouteFallback(<UserManagementPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="system/departments"
          element={
            <RequirePermission anyOf={getManagementRoutePermissions("departments")}>
              {withRouteFallback(<DepartmentsPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="system/master-data"
          element={
            <RequirePermission anyOf={getManagementRoutePermissions("company_information")}>
              {withRouteFallback(<MasterDataPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="system/payment-accounts"
          element={
            <RequirePermission anyOf={getManagementRoutePermissions("payment_accounts")}>
              {withRouteFallback(<PaymentAccountsPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="system/notification-channels"
          element={
            <RequirePermission anyOf={getManagementRoutePermissions("notification_channels")}>
              {withRouteFallback(<NotificationChannelsPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="system/workspace"
          element={
            <RequirePermission anyOf={getManagementRoutePermissions("workspace")}>
              {withRouteFallback(<WorkspaceSetupPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="system/settings"
          element={
            <RequirePermission anyOf={getManagementRoutePermissions("management")}>
              {withRouteFallback(<SystemSettingsPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="system/approval-rules"
          element={
            <RequirePermission anyOf={getManagementRoutePermissions("approval_rules")}>
              {withRouteFallback(<ApprovalRulesPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="system/expense-standards"
          element={
            <RequirePermission anyOf={getManagementRoutePermissions("expense_standards")}>
              {withRouteFallback(<ExpenseStandardsPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="system/feature-flags"
          element={
            <RequirePermission anyOf={getManagementRoutePermissions("feature_flags")}>
              {withRouteFallback(<FeatureFlagsPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="system/announcements"
          element={
            <RequirePermission anyOf={getManagementRoutePermissions("system_announcements")}>
              {withRouteFallback(<PortalAnnouncementsPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="system/workflow-definitions"
          element={
            <RequirePermission anyOf={getManagementRoutePermissions("workflow_definitions")}>
              {withRouteFallback(<WorkflowDefinitionsPage />)}
            </RequirePermission>
          }
        />

        <Route
          path="system/cutover"
          element={
            <RequirePermission anyOf={getManagementRoutePermissions("cutover")}>
              {withRouteFallback(<CutoverConsolePage />)}
            </RequirePermission>
          }
        />

        <Route path="settings/profile" element={<ProfilePage />} />
      </Route>

      <Route path="/403" element={<ForbiddenPage />} />
      <Route path="*" element={<NotFoundPage />} />
  </Route>
);

export const appRouter = createBrowserRouter(createRoutesFromElements(routeElements));