import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class RouteParser extends RouteInformationParser<RouteInformation> {
  RouteParser();

  @override
  Future<RouteInformation> parseRouteInformation(RouteInformation routeInformation) => SynchronousFuture(routeInformation);
}

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  static final outerRouterDelegate = OuterRouterDelegate();

  @override
  void dispose() {
    outerRouterDelegate.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp.router(
      title: 'PopScope Test',
      routerDelegate: outerRouterDelegate,
      routeInformationParser: RouteParser(),
    );
  }
}

class OuterRouterDelegate extends RouterDelegate<RouteInformation> with ChangeNotifier {
  List<Page<dynamic>> get pages => [const MaterialPage(child: OuterScreen())];

  @override
  Widget build(BuildContext context) {
    return Navigator(
      pages: pages,
      onPopPage: (_, __) => false,
    );
  }

  @override
  Future<bool> popRoute() async => true;

  @override
  Future<void> setNewRoutePath(RouteInformation configuration) async {}
}

class OuterScreen extends StatelessWidget {
  const OuterScreen({super.key});

  @override
  Widget build(BuildContext context) {
    return const Column(
      children: [
        Expanded(child: Text('Outer')),
        SizedBox(width: 8),
        Flexible(child: InnerScreen()),
      ],
    );
  }
}

class InnerScreen extends StatefulWidget {
  const InnerScreen({super.key});

  @override
  State<InnerScreen> createState() => _InnerScreenState();
}

class _InnerScreenState extends State<InnerScreen> {
  static final innerRouterDelegate = InnerRouterDelegate();

  @override
  void dispose() {
    innerRouterDelegate.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Router(
      routerDelegate: innerRouterDelegate,
      routeInformationParser: RouteParser(),
    );
  }
}

class InnerRouterDelegate extends RouterDelegate<RouteInformation> with ChangeNotifier {
  @override
  Widget build(BuildContext context) {
    return Navigator(
      pages: [
        MaterialPage(
          child: PopScope(
            canPop: false,
            onPopInvoked: print,
            child: Column(
              children: [
                const Text('Inner'),
                const SizedBox(height: 8),
                ElevatedButton(onPressed: _MyAppState.outerRouterDelegate.notifyListeners, child: const Text('Rebuild Outer Navigator')),
                const SizedBox(height: 8),
                ElevatedButton(onPressed: _InnerScreenState.innerRouterDelegate.notifyListeners, child: const Text('Rebuild Inner Navigator')),
              ],
            ),
          ),
        ),
      ],
      onPopPage: (_, __) => false,
    );
  }

  @override
  Future<bool> popRoute() async => true;

  @override
  Future<void> setNewRoutePath(RouteInformation configuration) async {}
}