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

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

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

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      title: 'Flutter Demo',
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key, required this.title}) : super(key: key);

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  var hidden = true;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title, style: const TextStyle(fontFamily: 'ProductSans')),
      ),
      body: Container(
        alignment: Alignment.center,
        padding: const EdgeInsets.symmetric(horizontal: 100),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: [
            const Text(
              'If a11y is enabled before toggling the card contents, '
              'the aria-label for the card will be missing. If it is not '
              'enabled until after toggling the contents visible, then the '
              'aria-label will be correct.',
            ),
            Card(
              child: Semantics(
                button: true,
                child: InkWell(
                  onTap: debugDumpSemanticsTree,
                  child: Padding(
                    padding: const EdgeInsets.all(20),
                    child: hidden
                        ? const CircularProgressIndicator()
                        : const Text('Click on me to debugDumpSemanticsTree()'),
                  ),
                ),
              ),
            ),
            const SizedBox(height: 24),
            FilledButton(
              onPressed: () => setState(() {
                hidden = !hidden;
              }),
              child: const Text('Toggle card contents'),
            ),
            const SizedBox(height: 24),
            FilledButton(
              onPressed: () => SemanticsBinding.instance.ensureSemantics(),
              child: const Text('Enable accessibility'),
            ),
          ],
        ),
      ),
    );
  }
}