import { BrowserRouter, Routes, Route, Navigate } from 'react-router-dom';
import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
import { Toaster } from 'react-hot-toast';
import { useEffect } from 'react';

import { useAuthStore } from '@/store/authStore';
import { useConfigStore } from '@/store/configStore';
import { MainLayout } from '@/components/layout';
import { LoadingOverlay } from '@/components/ui';

import { Login } from '@/pages/Login';
import { Dashboard } from '@/pages/Dashboard';
import { CustomersList } from '@/pages/customers';
import { ProjectsList } from '@/pages/projects';
import { TasksList } from '@/pages/tasks';
import { EquipmentList } from '@/pages/equipment';
import { RMAList } from '@/pages/rma';
import { SettingsDashboard } from '@/pages/settings';

const queryClient = new QueryClient({
  defaultOptions: {
    queries: {
      staleTime: 1000 * 60 * 5, // 5 minutes
      retry: 1,
    },
  },
});

function ProtectedRoute({ children }: { children: React.ReactNode }) {
  const { isAuthenticated, user, isLoading, fetchProfile } = useAuthStore();
  const { fetchConfig, isLoaded: configLoaded } = useConfigStore();

  useEffect(() => {
    // Only fetch profile if we have a token but no user data
    const token = localStorage.getItem('accessToken');
    if (token && !user) {
      fetchProfile();
    }
  }, [user, fetchProfile]);

  useEffect(() => {
    if (isAuthenticated && !configLoaded) {
      fetchConfig();
    }
  }, [isAuthenticated, configLoaded, fetchConfig]);

  // Show loading only when we're actively fetching
  if (isLoading && !user) {
    return <LoadingOverlay message="Načítavam..." />;
  }

  if (!isAuthenticated) {
    return <Navigate to="/login" replace />;
  }

  return <>{children}</>;
}

function AdminRoute({ children }: { children: React.ReactNode }) {
  const { user } = useAuthStore();

  if (user?.role.code !== 'ROOT' && user?.role.code !== 'ADMIN') {
    return <Navigate to="/" replace />;
  }

  return <>{children}</>;
}

function AppRoutes() {
  const { isAuthenticated } = useAuthStore();

  return (
    <Routes>
      <Route
        path="/login"
        element={isAuthenticated ? <Navigate to="/" replace /> : <Login />}
      />
      <Route
        element={
          <ProtectedRoute>
            <MainLayout />
          </ProtectedRoute>
        }
      >
        <Route path="/" element={<Dashboard />} />
        <Route path="/customers" element={<CustomersList />} />
        <Route path="/projects" element={<ProjectsList />} />
        <Route path="/tasks" element={<TasksList />} />
        <Route path="/equipment" element={<EquipmentList />} />
        <Route path="/rma" element={<RMAList />} />
        <Route
          path="/settings"
          element={
            <AdminRoute>
              <SettingsDashboard />
            </AdminRoute>
          }
        />
      </Route>
      <Route path="*" element={<Navigate to="/" replace />} />
    </Routes>
  );
}

export function App() {
  return (
    <QueryClientProvider client={queryClient}>
      <BrowserRouter>
        <AppRoutes />
        <Toaster
          position="top-right"
          toastOptions={{
            duration: 3000,
            style: {
              background: '#fff',
              color: '#0f172a',
              border: '1px solid #e2e8f0',
            },
          }}
        />
      </BrowserRouter>
    </QueryClientProvider>
  );
}