ibit-flutter/lib/core/router/app_router.dart

import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';
import '../../presentation/screens/home/home_screen.dart';
import '../../presentation/screens/market/futures_market_detail_screen.dart';
import '../../presentation/screens/market/spot_market_detail_screen.dart';
import '../../presentation/screens/market/market_screen.dart';
import '../../presentation/screens/copy_trading/copy_trading_screen.dart';
import '../../presentation/screens/copy_trading/trader_apply_screen.dart';
import '../../presentation/screens/copy_trading/my_trades_screen.dart';
import '../../presentation/screens/copy_trading/trader_settings_screen.dart';
import '../../presentation/screens/copy_trading/my_copy_trading_screen.dart';
import '../../presentation/screens/copy_trading/trader_detail_screen.dart';
import '../../presentation/screens/copy_trading/follow_setting_screen.dart';
import '../../presentation/screens/placeholder_screen.dart';
import '../../presentation/screens/network_error_screen.dart';
import '../../presentation/screens/asset/asset_screen.dart';
import '../../presentation/screens/asset/deposit_screen.dart';
import '../../presentation/screens/asset/deposit_history_screen.dart';
import '../../presentation/screens/asset/withdraw_screen.dart';
import '../../presentation/screens/asset/withdraw_history_screen.dart';
import '../../presentation/screens/asset/withdraw_detail_screen.dart';
import '../../presentation/screens/asset/deposit_detail_screen.dart';
import '../../presentation/screens/asset/transfer_screen.dart';
import '../../presentation/screens/asset/transfer_history_screen.dart';
import '../../presentation/screens/asset/asset_history_screen.dart';
import '../../data/models/asset/withdraw_record.dart';
import '../../data/models/asset/recharge_record.dart';
import '../../presentation/screens/futures/futures_screen.dart';
import '../../presentation/screens/futures/futures_history_screen.dart';
import '../../presentation/screens/futures/position_detail_screen.dart';
import '../../presentation/screens/futures/order_detail_screen.dart';
import '../../presentation/screens/spot/spot_screen.dart';
import '../../presentation/screens/spot/spot_history_screen.dart';
import '../../presentation/screens/spot/spot_account_records_screen.dart';
import '../../providers/futures_provider.dart'
    show FuturesPosition, FuturesOrder, futuresProvider;
import '../../presentation/screens/auth/login_screen.dart';
import '../../presentation/screens/auth/register_screen.dart';
import '../../presentation/screens/auth/forgot_password_screen.dart';
import '../../presentation/screens/auth/two_factor_screen.dart';
import '../../presentation/screens/auth/verify_code_screen.dart';
import '../../presentation/screens/user/change_password_screen.dart';
import '../../presentation/screens/user/fund_password_screen.dart';
import '../../presentation/screens/user/google_auth_screen.dart';
import '../../presentation/screens/user/google_auth_bind_screen.dart';
import '../../presentation/screens/user/notification_detail_screen.dart';
import '../../presentation/screens/user/notifications_screen.dart';
import '../../presentation/screens/user/profile_screen.dart';
import '../../presentation/screens/user/security_screen.dart';
import '../../presentation/screens/user/service_route_screen.dart';
import '../../presentation/screens/invite/invite_friends_screen.dart';
import '../../presentation/screens/broker/broker_apply_screen.dart';
import '../../presentation/screens/broker/broker_screen.dart';
import '../../presentation/screens/broker/my_invitations_screen.dart';
import '../../presentation/screens/broker/team_detail_screen.dart';
import '../../presentation/screens/user/help_center_screen.dart';
import '../../presentation/screens/user/help_detail_screen.dart';
import '../../presentation/screens/user/language_screen.dart';
import '../../presentation/screens/user/protocol_screen.dart';
import '../../presentation/screens/finance/finance_hub_screen.dart';
import '../../presentation/screens/finance/staking_screen.dart';
import '../../presentation/screens/finance/staking_team_screen.dart';
import '../../presentation/screens/common/qr_scanner_screen.dart';
import '../../presentation/widgets/common/bottom_nav_shell.dart';
import '../../providers/auth_provider.dart';
import '../../providers/asset_provider.dart';
import '../../providers/profile_provider.dart';
import '../../providers/home_provider.dart';
import '../l10n/app_localizations.dart';
import '../network/dio_client.dart' show sessionExpiredProvider;

/// 需要登录的路由前缀（startsWith 匹配）
const _authRequiredPrefixes = [
  '/asset',
  '/asset/deposit',
  '/asset/withdraw',
  '/asset/transfer',
  '/user/account',
  '/user/security',
  '/user/kyc',
  '/user/api-keys',
  '/user/referral',
  '/user/messages',
  '/broker',
  '/broker/apply',
  '/broker/my-invitations',
  '/broker/team-detail',
];

/// 全局 Navigator Key，用于在非 Widget 上下文中弹出对话框
final rootNavigatorKey = GlobalKey<NavigatorState>();

// 各 Tab 分支固定 NavigatorKey，避免 StatefulShellRoute 热重载/重建时 GlobalKey 冲突
final _homeTabKey    = GlobalKey<NavigatorState>(debugLabel: 'homeTab');
final _marketTabKey  = GlobalKey<NavigatorState>(debugLabel: 'marketTab');
final _futuresTabKey = GlobalKey<NavigatorState>(debugLabel: 'futuresTab');
final _copyTabKey    = GlobalKey<NavigatorState>(debugLabel: 'copyTab');
final _assetTabKey   = GlobalKey<NavigatorState>(debugLabel: 'assetTab');

/// 路由 Provider — 监听 isLoggedInProvider 实现登录状态自动刷新路由
final appRouterProvider = Provider<GoRouter>((ref) {
  final notifier = _RouterNotifier(ref);

  return GoRouter(
    navigatorKey: rootNavigatorKey,
    initialLocation: '/',
    debugLogDiagnostics: true,
    refreshListenable: notifier,
    redirect: (context, state) {
      final isLoggedIn = ref.read(isLoggedInProvider);
      final path = state.matchedLocation;

      // 未登录访问受保护路由 → 跳转登录
      final needsAuth = _authRequiredPrefixes.any((p) => path.startsWith(p));
      if (!isLoggedIn && needsAuth) {
        return '/login';
      }
      // 已登录访问登录/注册页 → 跳转首页
      if (isLoggedIn && (path == '/login' || path == '/register')) {
        return '/';
      }
      return null;
    },
    routes: [
      // ── 带底部导航的 Tab 路由 ─────────────────────────
      StatefulShellRoute.indexedStack(
        pageBuilder: (context, state, navigationShell) {
          return NoTransitionPage(
            child: BottomNavShell(navigationShell: navigationShell),
          );
        },
        branches: [
          // Tab 0: 首页
          StatefulShellBranch(
            navigatorKey: _homeTabKey,
            routes: [
              GoRoute(
                path: '/',
                builder: (context, state) => const HomeScreen(),
              ),
            ],
          ),
          // Tab 1: 行情
          StatefulShellBranch(
            navigatorKey: _marketTabKey,
            routes: [
              GoRoute(
                path: '/market',
                builder: (context, state) => const MarketScreen(),
              ),
            ],
          ),
          // Tab 2: 合约 / 现货
          StatefulShellBranch(
            navigatorKey: _futuresTabKey,
            initialLocation: '/spot/BTCUSDT',
            routes: [
              GoRoute(
                path: '/spot/:symbol',
                builder: (context, state) => SpotScreen(
                  symbol: state.pathParameters['symbol'] ?? 'BTCUSDT',
                ),
                routes: [
                  GoRoute(
                    path: 'history',
                    redirect: (context, state) {
                      final loggedIn = ref.read(isLoggedInProvider);
                      return loggedIn ? null : '/login';
                    },
                    builder: (context, state) => SpotHistoryScreen(
                      symbol: state.pathParameters['symbol'] ?? 'BTCUSDT',
                    ),
                  ),
                  GoRoute(
                    path: 'records',
                    redirect: (context, state) {
                      final loggedIn = ref.read(isLoggedInProvider);
                      return loggedIn ? null : '/login';
                    },
                    builder: (context, state) => SpotAccountRecordsScreen(
                      initialSymbol: state.uri.queryParameters['symbol'],
                    ),
                  ),
                ],
              ),
              GoRoute(
                path: '/futures/:symbol',
                builder: (context, state) => FuturesScreen(
                  symbol: state.pathParameters['symbol'] ?? 'BTCUSDT',
                ),
                routes: [
                  GoRoute(
                    path: 'history',
                    redirect: (context, state) {
                      final loggedIn = ref.read(isLoggedInProvider);
                      return loggedIn ? null : '/login';
                    },
                    builder: (context, state) => const FuturesHistoryScreen(),
                    routes: [
                      GoRoute(
                        path: 'position-detail',
                        builder: (context, state) =>
                            PositionHistoryDetailScreen(
                          data: state.extra! as Map<String, dynamic>,
                        ),
                      ),
                      GoRoute(
                        path: 'order-detail',
                        builder: (context, state) => OrderHistoryDetailScreen(
                          data: state.extra! as Map<String, dynamic>,
                        ),
                      ),
                    ],
                  ),
                  GoRoute(
                    path: 'position-detail',
                    builder: (context, state) => PositionDetailScreen(
                      position: state.extra! as FuturesPosition,
                      symbol: state.pathParameters['symbol'] ?? 'BTCUSDT',
                    ),
                  ),
                  GoRoute(
                    path: 'order-detail',
                    builder: (context, state) => OrderDetailScreen(
                      order: state.extra! as FuturesOrder,
                    ),
                  ),
                ],
              ),
            ],
          ),
          // Tab 3: 合约
          StatefulShellBranch(
            initialLocation: '/contracts',
            routes: [
              GoRoute(
                path: '/contracts',
                builder: (context, state) => const FuturesScreen(
                  symbol: 'BTCUSDT',
                  showSpotSwitcher: false,
                ),
                routes: [
                  GoRoute(
                    path: ':symbol',
                    builder: (context, state) => FuturesScreen(
                      symbol: state.pathParameters['symbol'] ?? 'BTCUSDT',
                      showSpotSwitcher: false,
                    ),
                  ),
                ],
              ),
            ],
          ),
          // Tab 4: 跟单
          StatefulShellBranch(
            navigatorKey: _copyTabKey,
            routes: [
              GoRoute(
                path: '/copy-trading',
                builder: (context, state) => const CopyTradingScreen(),
              ),
            ],
          ),
          // Tab 5: 资产
          StatefulShellBranch(
            navigatorKey: _assetTabKey,
            routes: [
              GoRoute(
                path: '/asset',
                builder: (context, state) {
                  final tab = state.uri.queryParameters['tab'];
                  int? initialSubTab;
                  if (tab == 'staking' || tab == 'locked') {
                    initialSubTab = 5;
                  }
                  return AssetScreen(initialSubTab: initialSubTab);
                },
              ),
            ],
          ),
        ],
      ),

      // ── 认证流程（无底部导航，使用右滑入/左滑出转场）───
      GoRoute(
        path: '/login',
        pageBuilder: (context, state) => CustomTransitionPage(
          key: state.pageKey,
          child: const LoginScreen(),
          transitionsBuilder: (context, animation, secondaryAnimation, child) {
            const begin = Offset(1, 0);
            const end = Offset.zero;
            final tween = Tween(begin: begin, end: end)
                .chain(CurveTween(curve: Curves.easeInOut));
            return SlideTransition(
                position: animation.drive(tween), child: child);
          },
        ),
      ),
      GoRoute(
        path: '/register',
        pageBuilder: (context, state) => CustomTransitionPage(
          key: state.pageKey,
          child: const RegisterScreen(),
          transitionsBuilder: (context, animation, secondaryAnimation, child) {
            const begin = Offset(1, 0);
            const end = Offset.zero;
            final tween = Tween(begin: begin, end: end)
                .chain(CurveTween(curve: Curves.easeInOut));
            return SlideTransition(
                position: animation.drive(tween), child: child);
          },
        ),
      ),
      GoRoute(
        path: '/two-factor',
        pageBuilder: (context, state) => CustomTransitionPage(
          key: state.pageKey,
          child: const TwoFactorScreen(),
          transitionsBuilder: (context, animation, secondaryAnimation, child) {
            const begin = Offset(1, 0);
            const end = Offset.zero;
            final tween = Tween(begin: begin, end: end)
                .chain(CurveTween(curve: Curves.easeInOut));
            return SlideTransition(
                position: animation.drive(tween), child: child);
          },
        ),
      ),
      GoRoute(
        path: '/verify-code',
        pageBuilder: (context, state) => CustomTransitionPage(
          key: state.pageKey,
          child: VerifyCodeScreen(args: state.extra! as VerifyCodeArgs),
          transitionsBuilder: (context, animation, secondaryAnimation, child) {
            const begin = Offset(1, 0);
            const end = Offset.zero;
            final tween = Tween(begin: begin, end: end)
                .chain(CurveTween(curve: Curves.easeInOut));
            return SlideTransition(
                position: animation.drive(tween), child: child);
          },
        ),
      ),
      GoRoute(
        path: '/forgot-password',
        pageBuilder: (context, state) => CustomTransitionPage(
          key: state.pageKey,
          child: const ForgotPasswordScreen(),
          transitionsBuilder: (context, animation, secondaryAnimation, child) {
            const begin = Offset(1, 0);
            const end = Offset.zero;
            final tween = Tween(begin: begin, end: end)
                .chain(CurveTween(curve: Curves.easeInOut));
            return SlideTransition(
                position: animation.drive(tween), child: child);
          },
        ),
      ),

      // ── 行情详情（无底部导航）──────────────────────────
      GoRoute(
        path: '/market/futures/:symbol',
        builder: (context, state) => FuturesMarketDetailScreen(
          symbol: state.pathParameters['symbol'] ?? 'BTCUSDT',
        ),
      ),
      GoRoute(
        path: '/market/spot/:symbol',
        builder: (context, state) => SpotMarketDetailScreen(
          symbol: state.pathParameters['symbol'] ?? 'BTCUSDT',
        ),
      ),

      // ── 我的跟单（无底部导航）──────────────────────────
      GoRoute(
        path: '/my-copy-trading',
        builder: (context, state) => const MyCopyTradingScreen(),
      ),
      GoRoute(
        path: '/trader-apply',
        builder: (context, state) => const TraderApplyScreen(),
      ),
      // ── 我的带单（带单员专用）────────────────────────────
      GoRoute(
        path: '/my-trades',
        builder: (context, state) => const MyTradesScreen(),
      ),
      GoRoute(
        path: '/trader-settings',
        builder: (context, state) => const TraderSettingsScreen(),
      ),
      GoRoute(
        path: '/trader-detail/:traderId',
        builder: (context, state) => TraderDetailScreen(
          traderId: state.pathParameters['traderId'] ?? '',
        ),
      ),
      GoRoute(
        path: '/follow-setting',
        builder: (context, state) => FollowSettingScreen(
          trader: state.extra! as Map<String, dynamic>,
        ),
      ),

      // ── 资产操作（无底部导航）──────────────────────────
      GoRoute(
        path: '/asset/deposit',
        builder: (context, state) => const DepositScreen(),
      ),
      GoRoute(
        path: '/asset/deposit/history',
        builder: (context, state) => const DepositHistoryScreen(),
      ),
      GoRoute(
        path: '/asset/deposit/detail',
        builder: (context, state) {
          final record = state.extra as RechargeRecord;
          return DepositDetailScreen(record: record);
        },
      ),
      GoRoute(
        path: '/asset/withdraw',
        builder: (context, state) => const WithdrawScreen(),
      ),
      GoRoute(
        path: '/asset/withdraw/history',
        builder: (context, state) => const WithdrawHistoryScreen(),
      ),
      GoRoute(
        path: '/asset/withdraw/detail',
        builder: (context, state) {
          final record = state.extra as WithdrawRecord;
          final isTransfer = state.uri.queryParameters['isTransfer'] == 'true';
          return WithdrawDetailScreen(record: record, isTransfer: isTransfer);
        },
      ),
      GoRoute(
        path: '/asset/transfer',
        builder: (context, state) {
          final qp = state.uri.queryParameters;
          return TransferScreen(
            initialFrom: qp['from'],
            initialTo: qp['to'],
            initialSymbol: qp['symbol'],
            preferDefaultSymbol: qp['preferSymbol'] == '1',
            spotTradingBridgeOnly: qp['bridgeOnly'] == '1',
          );
        },
      ),
      GoRoute(
        path: '/asset/transfer/history',
        builder: (context, state) => const TransferHistoryScreen(),
      ),
      GoRoute(
        path: '/asset/history',
        builder: (context, state) => const AssetHistoryScreen(),
      ),
      GoRoute(
        path: '/qr-scanner',
        builder: (context, state) => const QrScannerScreen(),
      ),

      // ── 个人中心（无底部导航）──────────────────────────
      GoRoute(
        path: '/user',
        builder: (context, state) => const ProfileScreen(),
      ),
      GoRoute(
        path: '/user/account',
        builder: (context, state) =>
            const PlaceholderScreen(title: '账户设置', icon: Icons.settings),
      ),
      GoRoute(
        path: '/user/security',
        builder: (context, state) => const SecurityScreen(),
      ),
      GoRoute(
        path: '/user/security/google-auth',
        builder: (context, state) => const GoogleAuthScreen(),
      ),
      GoRoute(
        path: '/user/security/google-auth/bind',
        builder: (context, state) => const GoogleAuthBindScreen(),
      ),
      GoRoute(
        path: '/user/security/fund-password',
        builder: (context, state) {
          final isReset = state.extra as bool? ?? false;
          return FundPasswordScreen(isResetMode: isReset);
        },
      ),
      GoRoute(
        path: '/user/security/change-password',
        builder: (context, state) => const ChangePasswordScreen(),
      ),
      GoRoute(
        path: '/user/kyc',
        builder: (context, state) =>
            const PlaceholderScreen(title: '身份认证', icon: Icons.verified_user),
      ),
      GoRoute(
        path: '/user/api-keys',
        builder: (context, state) =>
            const PlaceholderScreen(title: 'API 管理', icon: Icons.key),
      ),
      GoRoute(
        path: '/user/referral',
        builder: (context, state) => const InviteFriendsScreen(),
      ),
      GoRoute(
        path: '/user/messages',
        builder: (context, state) => const NotificationsScreen(),
      ),
      GoRoute(
        path: '/user/messages/:id',
        builder: (context, state) => NotificationDetailScreen(
          id: state.pathParameters['id'] ?? '',
        ),
      ),
      GoRoute(
        path: '/user/service-route',
        builder: (context, state) => const ServiceRouteScreen(),
      ),
      GoRoute(
        path: '/user/language',
        builder: (context, state) => const LanguageScreen(),
      ),
      GoRoute(
        path: '/user/help',
        builder: (context, state) => const HelpCenterScreen(),
      ),
      GoRoute(
        path: '/user/help/:id',
        builder: (context, state) => HelpDetailScreen(
          id: state.pathParameters['id'] ?? '',
        ),
      ),
      GoRoute(
        path: '/protocol',
        builder: (context, state) {
          final args = state.extra as ProtocolArgs?;
          return ProtocolScreen(
            title: args?.title ?? '',
            categoryCode: args?.categoryCode ?? 'PROTOCOL',
          );
        },
      ),
      GoRoute(
        path: '/finance/ido',
        builder: (context, state) {
          final tab = state.uri.queryParameters['tab'];
          final initialTab = tab == 'airdrop' ? 1 : 0;
          return FinanceHubScreen(initialTab: initialTab);
        },
      ),
      GoRoute(
        path: '/finance/stake/:configId',
        builder: (context, state) => StakingScreen(
          configId: state.pathParameters['configId'],
        ),
      ),
      GoRoute(
        path: '/finance/airdrop',
        builder: (context, state) => const FinanceHubScreen(initialTab: 1),
      ),
      GoRoute(
        path: '/finance/team',
        builder: (context, state) => const StakingTeamScreen(),
      ),
      GoRoute(
        path: '/user/about',
        builder: (context, state) =>
            const PlaceholderScreen(title: '关于', icon: Icons.info),
      ),

      // ── 经纪商 ────────────────────────────────────────
      GoRoute(
        path: '/broker',
        builder: (context, state) => const BrokerScreen(),
      ),
      GoRoute(
        path: '/broker/apply',
        builder: (context, state) => const BrokerApplyScreen(),
      ),
      GoRoute(
        path: '/broker/my-invitations',
        builder: (context, state) => const MyInvitationsScreen(),
      ),
      GoRoute(
        path: '/broker/team-detail',
        builder: (context, state) => const TeamDetailScreen(),
      ),

      // ── 网络加载失败页 ────────────────────────────────
      GoRoute(
        path: '/network-error',
        builder: (context, state) {
          final extra = state.extra as Map<String, dynamic>?;
          return NetworkErrorScreen(
            title: extra?['title'] as String? ?? '行情',
            errorCode: extra?['errorCode'] as String?,
            onRetry: extra?['onRetry'] as VoidCallback?,
          );
        },
      ),

      // ── Deep Link 路径映射 ────────────────────────────
      GoRoute(
        path: '/f/:symbol',
        redirect: (context, state) {
          final symbol = state.pathParameters['symbol'] ?? 'BTCUSDT';
          return '/futures/$symbol';
        },
      ),
    ],
  );
});

/// 桥接 Riverpod → GoRouter refreshListenable
class _RouterNotifier extends ChangeNotifier {
  /// true 时跳过 isLoggedInProvider 变化引发的 notifyListeners，
  /// 用于 session 过期场景：由 dialog 按钮统一执行导航，避免双重导航断言。
  bool _suppressLoggedOutNotify = false;

  /// 保存 ref，供 dialog 按钮回调中延迟 invalidate 使用
  late final Ref _ref;

  _RouterNotifier(Ref ref) {
    _ref = ref;
    ref.listen(isLoggedInProvider, (prev, next) {
      if (prev == true && next == false) {
        if (_suppressLoggedOutNotify) return;
        // 主动登出：先触发 redirect 导航，下一帧再 invalidate provider，
        // 避免 invalidate rebuild 与 GoRouter navigation 并发导致 Duplicate GlobalKey 崩溃
        notifyListeners();
        // 下一帧再 invalidate：profile 由 isLoggedIn 监听同步降为访客，
        // 另行 invalidate 易与_uc/member/my-info 等在途请求收尾并发，触发 element 断言。
        WidgetsBinding.instance.addPostFrameCallback((_) {
          ref.invalidate(assetProvider);
          ref.invalidate(homeProvider);
          ref.invalidate(futuresProvider);
        });
      }
      // 登录：导航由页面显式 context.go('/') 处理，不在此触发 notifyListeners，
      // 避免与 context.go 并发导致 element._lifecycleState 断言失败。
    });
    ref.listen(sessionExpiredProvider, (_, expired) {
      if (expired) {
        ref.read(sessionExpiredProvider.notifier).state = false;
        // 阻止 isLoggedInProvider 监听器触发 notifyListeners（→ redirect），
        // 导航由 dialog 按钮的 context.go('/login') 统一处理，避免双重导航。
        _suppressLoggedOutNotify = true;
        // 只清本地登录态，不请求 logout 接口（token 已失效，请求也会报 4000）
        ref.read(authProvider.notifier).clearLocalSession();
        _suppressLoggedOutNotify = false;
        // 下一帧再弹 dialog，此时 clearLocalSession 的 rebuild 已完成；
        // provider invalidate 推迟到用户点击确认后导航完成再执行，
        // 确保 navigation 与 invalidate 完全不在同一帧
        WidgetsBinding.instance.addPostFrameCallback((_) {
          _showSessionExpiredDialog();
        });
      }
    });
  }

  void _showSessionExpiredDialog() {
    final ctx = rootNavigatorKey.currentContext;
    if (ctx == null) return;
    final cs = Theme.of(ctx).colorScheme;
    final l10n = AppLocalizations.of(ctx)!;
    showDialog(
      context: ctx,
      barrierDismissible: false,
      builder: (dialogCtx) => AlertDialog(
        backgroundColor: cs.surface,
        title: Text(l10n.sessionExpiredTitle, style: TextStyle(color: cs.onSurface)),
        content: Text(
          l10n.sessionExpiredContent,
          style: TextStyle(color: cs.onSurface.withAlpha(153)),
        ),
        actions: [
          TextButton(
            onPressed: () {
              Navigator.of(dialogCtx).pop();
              rootNavigatorKey.currentContext?.go('/login');
              // 导航完成后下一帧再 invalidate，避免与 navigation 并发
              WidgetsBinding.instance.addPostFrameCallback((_) {
                _ref.invalidate(assetProvider);
                _ref.invalidate(profileProvider);
                _ref.invalidate(homeProvider);
                _ref.invalidate(futuresProvider);
              });
            },
            child: Text(l10n.relogin, style: TextStyle(color: cs.onSurface)),
          ),
        ],
      ),
    );
  }
}