import { Routes, Route, Navigate, useLocation } from 'react-router-dom';
import { useAuth } from '@/hooks/useAuth';
import Layout from '@/components/layout/Layout';
import { ReleaseNotesDialog } from '@/components/ReleaseNotesDialog';
import LoginPage from '@/pages/LoginPage';
import AdminPage from '@/pages/AdminPage';
import TrackerPage from '@/pages/TrackerPage';
import BillsPage from '@/pages/BillsPage';
import CategoriesPage from '@/pages/CategoriesPage';
import SettingsPage from '@/pages/SettingsPage';
import StatusPage from '@/pages/StatusPage';
import ReleaseNotesPage from '@/pages/ReleaseNotesPage';
import DataPage from '@/pages/DataPage';
import ProfilePage from '@/pages/ProfilePage';

function RequireAuth({ children, role }) {
  const { user, singleUserMode } = useAuth();
  const location = useLocation();

  // Loading state
  if (user === undefined) {
    return (
      <div className="flex items-center justify-center min-h-screen bg-background text-muted-foreground text-sm">
        Loading...
      </div>
    );
  }

  // Single-user mode bypass
  if (singleUserMode && role === 'user') return children;

  // Not authenticated
  if (!user) {
    return <Navigate to="/login" state={{ from: location }} replace />;
  }

  const roleAllowed = !role || user.role === role || (role === 'user' && user.role === 'admin');

  // Role mismatch
  if (!roleAllowed) {
    return <Navigate to={user.role === 'admin' ? '/admin' : '/'} replace />;
  }

  return children;
}

export default function App() {
  const { user } = useAuth();

  return (
    <>
      {/* Release notes (only for user role) */}
      {user?.role === 'user' && <ReleaseNotesDialog />}

      <Routes>
        <Route path="/login" element={<LoginPage />} />

        <Route
          path="/admin"
          element={
            <RequireAuth role="admin">
              <AdminPage />
            </RequireAuth>
          }
        />

        <Route
          element={
            <RequireAuth role="user">
              <Layout />
            </RequireAuth>
          }
        >
          <Route index element={<TrackerPage />} />
          <Route path="bills" element={<BillsPage />} />
          <Route path="categories" element={<CategoriesPage />} />
          <Route path="settings" element={<SettingsPage />} />
          <Route path="data" element={<DataPage />} />
          <Route path="profile" element={<ProfilePage />} />
          <Route path="status" element={<StatusPage />} />
          <Route path="release-notes" element={<ReleaseNotesPage />} />
          <Route path="*" element={<Navigate to="/" replace />} />
        </Route>
      </Routes>
    </>
  );
}