// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'package:flutter/material.dart';

import 'controls_constants.dart';
export 'controls_constants.dart';

/// A test page with a checkbox, three radio buttons, and a switch.
class SelectionControlsPage extends StatefulWidget {
  const SelectionControlsPage({super.key});

  @override
  State<StatefulWidget> createState() => _SelectionControlsPageState();
}

class _SelectionControlsPageState extends State<SelectionControlsPage> {
  static const ValueKey<String> checkbox1Key = ValueKey<String>(checkboxKeyValue);
  static const ValueKey<String> checkbox2Key = ValueKey<String>(disabledCheckboxKeyValue);
  static const ValueKey<String> radio1Key = ValueKey<String>(radio1KeyValue);
  static const ValueKey<String> radio2Key = ValueKey<String>(radio2KeyValue);
  static const ValueKey<String> radio3Key = ValueKey<String>(radio3KeyValue);
  static const ValueKey<String> switchKey = ValueKey<String>(switchKeyValue);
  static const ValueKey<String> labeledSwitchKey = ValueKey<String>(labeledSwitchKeyValue);
  bool _isChecked = false;
  bool _isOn = false;
  bool _isLabeledOn = false;
  int _radio = 0;

  void _updateCheckbox(bool? newValue) {
    setState(() {
      _isChecked = newValue!;
    });
  }

  void _updateRadio(int? newValue) {
    setState(() {
      _radio = newValue!;
    });
  }

  void _updateSwitch(bool newValue) {
    setState(() {
      _isOn = newValue;
    });
  }

  void _updateLabeledSwitch(bool newValue) {
    setState(() {
      _isLabeledOn = newValue;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(leading: const BackButton(key: ValueKey<String>('back'))),
      body: Material(
        child: Column(
          children: <Widget>[
            Row(
              children: <Widget>[
                Checkbox(key: checkbox1Key, value: _isChecked, onChanged: _updateCheckbox),
                const Checkbox(key: checkbox2Key, value: false, onChanged: null),
              ],
            ),
            const Spacer(),
            Row(
              children: <Widget>[
                Radio<int>(key: radio1Key, value: 0, groupValue: _radio, onChanged: _updateRadio),
                Radio<int>(key: radio2Key, value: 1, groupValue: _radio, onChanged: _updateRadio),
                Radio<int>(key: radio3Key, value: 2, groupValue: _radio, onChanged: _updateRadio),
              ],
            ),
            const Spacer(),
            Switch(key: switchKey, value: _isOn, onChanged: _updateSwitch),
            const Spacer(),
            MergeSemantics(
              child: Row(
                children: <Widget>[
                  const Text(switchLabel),
                  Switch(
                    key: labeledSwitchKey,
                    value: _isLabeledOn,
                    onChanged: _updateLabeledSwitch,
                  ),
                ],
              ),
            ),
          ],
        ),
      ),
    );
  }
}