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

final router = GoRouter(
  routes: [
    GoRoute(
      name: 'A',
      path: '/',
      builder: (_, __) => const PageA(),
    ),
    GoRoute(
      name: 'B',
      path: '/B',
      builder: (_, __) => const PageB(),
    ),
  ],
);

void main() => runApp(const App());

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp.router(
      routerConfig: router,
    );
  }
}

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.white,
      body: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Center(
            child: TextButton(
              onPressed: () {
                context.pushNamed('B');
              },
              child: const Text('Go to page B'),
            ),
          ),
        ],
      ),
    );
  }
}

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.grey,
      body: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Center(
            child: TextButton(
              onPressed: () {
                final ctx = router.routerDelegate.navigatorKey.currentContext!;
                ctx.goNamed('A');
                showDialog(
                  context: ctx,
                  builder: (_) => const AlertDialog(
                    title: Text('Dialog Title'),
                    content: Text('This is my content'),
                  ),
                );
              },
              child: const Text('Go Page A and Show dialog'),
            ),
          ),
        ],
      ),
    );
  }
}