import { BrowserRouter, Routes, Route, Navigate, useLocation } from 'react-router'
import { QueryClientProvider } from '@tanstack/react-query'
import { queryClient } from '@/lib/queryClient'
import { useAuthStore } from '@/store/authStore'
import type { UserRole } from '@/store/authStore'
import LoginPage from '@/pages/auth/LoginPage'
import AppDashboardPage from '@/pages/app/DashboardPage'
import ClientsPage from '@/pages/app/ClientsPage'
import CatalogPage from '@/pages/app/CatalogPage'
import WorkOrdersPage from '@/pages/app/WorkOrdersPage'
import WorkOrderDetailPage from '@/pages/app/WorkOrderDetailPage'
import StaffPage from '@/pages/app/StaffPage'
import ExpensesPage from '@/pages/app/ExpensesPage'
import SettingsPage from '@/pages/app/SettingsPage'
import InvoicesPage from '@/pages/app/InvoicesPage'
import ReportsPage from '@/pages/app/ReportsPage'
import VehicleReportsPage from '@/pages/app/VehicleReportsPage'
import ExpenseReportsPage from '@/pages/app/ExpenseReportsPage'
import TechnicianReportsPage from '@/pages/app/TechnicianReportsPage'
import HelpPage from '@/pages/app/HelpPage'
import AdminDashboardPage from '@/pages/admin/DashboardPage'
import TenantsPage from '@/pages/admin/TenantsPage'
import AdminSettingsPage from '@/pages/admin/SettingsPage'
import InviteRedeemPage from '@/pages/public/InviteRedeemPage'
import AppLayout from '@/components/layout/AppLayout'
import AdminLayout from '@/components/layout/AdminLayout'

function RequireAuth({
  children,
  allowedRoles,
}: {
  children: React.ReactNode
  allowedRoles: UserRole[]
}) {
  const { isAuthenticated, user } = useAuthStore()
  const location = useLocation()
  if (!isAuthenticated) return <Navigate to="/login" replace />
  // Allow super_admin carrying an impersonation payload through to /app —
  // AppLayout applies the role switch on mount via useLayoutEffect.
  const hasImpersonation = !!location.state?.impersonation
  if (user && !allowedRoles.includes(user.role) && !hasImpersonation) {
    return <Navigate to="/login" replace />
  }
  return <>{children}</>
}

export default function App() {
  return (
    <QueryClientProvider client={queryClient}>
      <BrowserRouter>
        <Routes>
          <Route path="/login" element={<LoginPage />} />
          <Route path="/invite/:token" element={<InviteRedeemPage />} />

          <Route
            path="/admin"
            element={
              <RequireAuth allowedRoles={['super_admin']}>
                <AdminLayout />
              </RequireAuth>
            }
          >
            <Route index element={<AdminDashboardPage />} />
            <Route path="tenants" element={<TenantsPage />} />
            <Route path="settings" element={<AdminSettingsPage />} />
          </Route>

          <Route
            path="/app"
            element={
              <RequireAuth allowedRoles={['tenant_admin', 'manager', 'technician']}>
                <AppLayout />
              </RequireAuth>
            }
          >
            <Route index element={<AppDashboardPage />} />
            <Route path="clients" element={<ClientsPage />} />
            <Route path="catalog" element={<CatalogPage />} />
            <Route path="work-orders" element={<WorkOrdersPage />} />
            <Route path="work-orders/:id" element={<WorkOrderDetailPage />} />
            <Route path="staff" element={<StaffPage />} />
            <Route path="expenses" element={<ExpensesPage />} />
            <Route path="invoices" element={<InvoicesPage />} />
            <Route path="reports" element={<ReportsPage />} />
            <Route path="reports/vehicles" element={<VehicleReportsPage />} />
            <Route path="reports/expenses" element={<ExpenseReportsPage />} />
            <Route path="reports/technicians" element={<TechnicianReportsPage />} />
            <Route path="settings" element={<SettingsPage />} />
            <Route path="help" element={<HelpPage />} />
          </Route>

          <Route path="/" element={<Navigate to="/app" replace />} />
        </Routes>
      </BrowserRouter>
    </QueryClientProvider>
  )
}