// 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 'dart:ui';

import 'package:flutter/foundation.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter/services.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:flutter/material.dart';

import '../widgets/semantics_tester.dart';

Widget wrap({Widget child}) {
  return MediaQuery(
    data: const MediaQueryData(),
    child: Directionality(
      textDirection: TextDirection.ltr,
      child: Material(child: child),
    ),
  );
}

void main() {
  testWidgets('RadioListTile should initialize according to groupValue',
      (WidgetTester tester) async {
    final List<int> values = <int>[0, 1, 2];
    int selectedValue;
    // Constructor parameters are required for [RadioListTile], but they are
    // irrelevant when searching with [find.byType].
    final Type radioListTileType = const RadioListTile<int>(
      value: 0,
      groupValue: 0,
      onChanged: null,
    ).runtimeType;

    List<RadioListTile<int>> generatedRadioListTiles;
    List<RadioListTile<int>> findTiles() => find
        .byType(radioListTileType)
        .evaluate()
        .map<Widget>((Element element) => element.widget)
        .cast<RadioListTile<int>>()
        .toList();

    Widget buildFrame() {
      return wrap(
        child: StatefulBuilder(
          builder: (BuildContext context, StateSetter setState) {
            return Scaffold(
              body: ListView.builder(
                itemCount: values.length,
                itemBuilder: (BuildContext context, int index) => RadioListTile<int>(
                  onChanged: (int value) {
                    setState(() {
                      selectedValue = value;
                    });
                  },
                  value: values[index],
                  groupValue: selectedValue,
                  title: Text(values[index].toString()),
                ),
              ),
            );
          },
        ),
      );
    }

    await tester.pumpWidget(buildFrame());
    generatedRadioListTiles = findTiles();

    expect(generatedRadioListTiles[0].checked, equals(false));
    expect(generatedRadioListTiles[1].checked, equals(false));
    expect(generatedRadioListTiles[2].checked, equals(false));

    selectedValue = 1;

    await tester.pumpWidget(buildFrame());
    generatedRadioListTiles = findTiles();

    expect(generatedRadioListTiles[0].checked, equals(false));
    expect(generatedRadioListTiles[1].checked, equals(true));
    expect(generatedRadioListTiles[2].checked, equals(false));
  });

  testWidgets('RadioListTile simple control test', (WidgetTester tester) async {
    final Key key = UniqueKey();
    final Key titleKey = UniqueKey();
    final List<int> log = <int>[];

    await tester.pumpWidget(
      wrap(
        child: RadioListTile<int>(
          key: key,
          value: 1,
          groupValue: 2,
          onChanged: log.add,
          title: Text('Title', key: titleKey),
        ),
      ),
    );

    await tester.tap(find.byKey(key));

    expect(log, equals(<int>[1]));
    log.clear();

    await tester.pumpWidget(
      wrap(
        child: RadioListTile<int>(
          key: key,
          value: 1,
          groupValue: 1,
          onChanged: log.add,
          activeColor: Colors.green[500],
          title: Text('Title', key: titleKey),
        ),
      ),
    );

    await tester.tap(find.byKey(key));

    expect(log, isEmpty);

    await tester.pumpWidget(
      wrap(
        child: RadioListTile<int>(
          key: key,
          value: 1,
          groupValue: 2,
          onChanged: null,
          title: Text('Title', key: titleKey),
        ),
      ),
    );

    await tester.tap(find.byKey(key));

    expect(log, isEmpty);

    await tester.pumpWidget(
      wrap(
        child: RadioListTile<int>(
          key: key,
          value: 1,
          groupValue: 2,
          onChanged: log.add,
          title: Text('Title', key: titleKey),
        ),
      ),
    );

    await tester.tap(find.byKey(titleKey));

    expect(log, equals(<int>[1]));
  });

  testWidgets('RadioListTile control tests', (WidgetTester tester) async {
    final List<int> values = <int>[0, 1, 2];
    int selectedValue;
    // Constructor parameters are required for [Radio], but they are irrelevant
    // when searching with [find.byType].
    final Type radioType = const Radio<int>(
      value: 0,
      groupValue: 0,
      onChanged: null,
    ).runtimeType;
    final List<dynamic> log = <dynamic>[];

    Widget buildFrame() {
      return wrap(
        child: StatefulBuilder(
          builder: (BuildContext context, StateSetter setState) {
            return Scaffold(
              body: ListView.builder(
                itemCount: values.length,
                itemBuilder: (BuildContext context, int index) => RadioListTile<int>(
                  onChanged: (int value) {
                    log.add(value);
                    setState(() {
                      selectedValue = value;
                    });
                  },
                  value: values[index],
                  groupValue: selectedValue,
                  title: Text(values[index].toString()),
                ),
              ),
            );
          },
        ),
      );
    }

    // Tests for tapping between [Radio] and [ListTile]
    await tester.pumpWidget(buildFrame());
    await tester.tap(find.text('1'));
    log.add('-');
    await tester.tap(find.byType(radioType).at(2));
    expect(log, equals(<dynamic>[1, '-', 2]));
    log.add('-');
    await tester.tap(find.text('1'));

    log.clear();
    selectedValue = null;

    // Tests for tapping across [Radio]s exclusively
    await tester.pumpWidget(buildFrame());
    await tester.tap(find.byType(radioType).at(1));
    log.add('-');
    await tester.tap(find.byType(radioType).at(2));
    expect(log, equals(<dynamic>[1, '-', 2]));

    log.clear();
    selectedValue = null;

    // Tests for tapping across [ListTile]s exclusively
    await tester.pumpWidget(buildFrame());
    await tester.tap(find.text('1'));
    log.add('-');
    await tester.tap(find.text('2'));
    expect(log, equals(<dynamic>[1, '-', 2]));
  });

  testWidgets('Selected RadioListTile should not trigger onChanged', (WidgetTester tester) async {
    // Regression test for https://github.com/flutter/flutter/issues/30311
    final List<int> values = <int>[0, 1, 2];
    int selectedValue;
    // Constructor parameters are required for [Radio], but they are irrelevant
    // when searching with [find.byType].
    final Type radioType = const Radio<int>(
      value: 0,
      groupValue: 0,
      onChanged: null,
    ).runtimeType;
    final List<dynamic> log = <dynamic>[];

    Widget buildFrame() {
      return wrap(
        child: StatefulBuilder(
          builder: (BuildContext context, StateSetter setState) {
            return Scaffold(
              body: ListView.builder(
                itemCount: values.length,
                itemBuilder: (BuildContext context, int index) => RadioListTile<int>(
                  onChanged: (int value) {
                    log.add(value);
                    setState(() {
                      selectedValue = value;
                    });
                  },
                  value: values[index],
                  groupValue: selectedValue,
                  title: Text(values[index].toString()),
                ),
              ),
            );
          },
        ),
      );
    }

    await tester.pumpWidget(buildFrame());
    await tester.tap(find.text('0'));
    await tester.pump();
    expect(log, equals(<int>[0]));

    await tester.tap(find.text('0'));
    await tester.pump();
    expect(log, equals(<int>[0]));

    await tester.tap(find.byType(radioType).at(0));
    await tester.pump();
    expect(log, equals(<int>[0]));
  });

  testWidgets('Selected RadioListTile should trigger onChanged when toggleable',
      (WidgetTester tester) async {
    final List<int> values = <int>[0, 1, 2];
    int selectedValue;
    // Constructor parameters are required for [Radio], but they are irrelevant
    // when searching with [find.byType].
    final Type radioType = const Radio<int>(
      value: 0,
      groupValue: 0,
      onChanged: null,
    ).runtimeType;
    final List<dynamic> log = <dynamic>[];

    Widget buildFrame() {
      return wrap(
        child: StatefulBuilder(
          builder: (BuildContext context, StateSetter setState) {
            return Scaffold(
              body: ListView.builder(
                itemCount: values.length,
                itemBuilder: (BuildContext context, int index) {
                  return RadioListTile<int>(
                    onChanged: (int value) {
                      log.add(value);
                      setState(() {
                        selectedValue = value;
                      });
                    },
                    toggleable: true,
                    value: values[index],
                    groupValue: selectedValue,
                    title: Text(values[index].toString()),
                  );
                },
              ),
            );
          },
        ),
      );
    }

    await tester.pumpWidget(buildFrame());
    await tester.tap(find.text('0'));
    await tester.pump();
    expect(log, equals(<int>[0]));

    await tester.tap(find.text('0'));
    await tester.pump();
    expect(log, equals(<int>[0, null]));

    await tester.tap(find.byType(radioType).at(0));
    await tester.pump();
    expect(log, equals(<int>[0, null, 0]));
  });

  testWidgets('RadioListTile can be toggled when toggleable is set', (WidgetTester tester) async {
    final Key key = UniqueKey();
    final List<int> log = <int>[];

    await tester.pumpWidget(Material(
      child: Center(
        child: Radio<int>(
          key: key,
          value: 1,
          groupValue: 2,
          onChanged: log.add,
          toggleable: true,
        ),
      ),
    ));

    await tester.tap(find.byKey(key));

    expect(log, equals(<int>[1]));
    log.clear();

    await tester.pumpWidget(Material(
      child: Center(
        child: Radio<int>(
          key: key,
          value: 1,
          groupValue: 1,
          onChanged: log.add,
          toggleable: true,
        ),
      ),
    ));

    await tester.tap(find.byKey(key));

    expect(log, equals(<int>[null]));
    log.clear();

    await tester.pumpWidget(Material(
      child: Center(
        child: Radio<int>(
          key: key,
          value: 1,
          groupValue: null,
          onChanged: log.add,
          toggleable: true,
        ),
      ),
    ));

    await tester.tap(find.byKey(key));

    expect(log, equals(<int>[1]));
  });

  testWidgets('RadioListTile semantics', (WidgetTester tester) async {
    final SemanticsTester semantics = SemanticsTester(tester);

    await tester.pumpWidget(
      wrap(
        child: RadioListTile<int>(
          value: 1,
          groupValue: 2,
          onChanged: (int i) {},
          title: const Text('Title'),
        ),
      ),
    );

    expect(
      semantics,
      hasSemantics(
        TestSemantics.root(
          children: <TestSemantics>[
            TestSemantics(
              id: 1,
              flags: <SemanticsFlag>[
                SemanticsFlag.hasCheckedState,
                SemanticsFlag.hasEnabledState,
                SemanticsFlag.isEnabled,
                SemanticsFlag.isInMutuallyExclusiveGroup,
                SemanticsFlag.isFocusable,
              ],
              actions: <SemanticsAction>[SemanticsAction.tap],
              label: 'Title',
              textDirection: TextDirection.ltr,
            ),
          ],
        ),
        ignoreRect: true,
        ignoreTransform: true,
      ),
    );

    await tester.pumpWidget(
      wrap(
        child: RadioListTile<int>(
          value: 2,
          groupValue: 2,
          onChanged: (int i) {},
          title: const Text('Title'),
        ),
      ),
    );

    expect(
      semantics,
      hasSemantics(
        TestSemantics.root(
          children: <TestSemantics>[
            TestSemantics(
              id: 1,
              flags: <SemanticsFlag>[
                SemanticsFlag.hasCheckedState,
                SemanticsFlag.isChecked,
                SemanticsFlag.hasEnabledState,
                SemanticsFlag.isEnabled,
                SemanticsFlag.isInMutuallyExclusiveGroup,
                SemanticsFlag.isFocusable,
              ],
              actions: <SemanticsAction>[SemanticsAction.tap],
              label: 'Title',
              textDirection: TextDirection.ltr,
            ),
          ],
        ),
        ignoreRect: true,
        ignoreTransform: true,
      ),
    );

    await tester.pumpWidget(
      wrap(
        child: const RadioListTile<int>(
          value: 1,
          groupValue: 2,
          onChanged: null,
          title: Text('Title'),
        ),
      ),
    );

    expect(
      semantics,
      hasSemantics(
        TestSemantics.root(
          children: <TestSemantics>[
            TestSemantics(
              id: 1,
              flags: <SemanticsFlag>[
                SemanticsFlag.hasCheckedState,
                SemanticsFlag.hasEnabledState,
                SemanticsFlag.isInMutuallyExclusiveGroup,
                SemanticsFlag.isFocusable,
              ],
              label: 'Title',
              textDirection: TextDirection.ltr,
            ),
          ],
        ),
        ignoreId: true,
        ignoreRect: true,
        ignoreTransform: true,
      ),
    );

    await tester.pumpWidget(
      wrap(
        child: const RadioListTile<int>(
          value: 2,
          groupValue: 2,
          onChanged: null,
          title: Text('Title'),
        ),
      ),
    );

    expect(
      semantics,
      hasSemantics(
        TestSemantics.root(
          children: <TestSemantics>[
            TestSemantics(
              id: 1,
              flags: <SemanticsFlag>[
                SemanticsFlag.hasCheckedState,
                SemanticsFlag.isChecked,
                SemanticsFlag.hasEnabledState,
                SemanticsFlag.isInMutuallyExclusiveGroup,
              ],
              label: 'Title',
              textDirection: TextDirection.ltr,
            ),
          ],
        ),
        ignoreId: true,
        ignoreRect: true,
        ignoreTransform: true,
      ),
    );

    semantics.dispose();
  });

  testWidgets('RadioListTile has semantic events', (WidgetTester tester) async {
    final SemanticsTester semantics = SemanticsTester(tester);
    final Key key = UniqueKey();
    dynamic semanticEvent;
    int radioValue = 2;
    SystemChannels.accessibility.setMockMessageHandler((dynamic message) async {
      semanticEvent = message;
    });

    await tester.pumpWidget(
      wrap(
        child: RadioListTile<int>(
          key: key,
          value: 1,
          groupValue: radioValue,
          onChanged: (int i) {
            radioValue = i;
          },
          title: const Text('Title'),
        ),
      ),
    );

    await tester.tap(find.byKey(key));
    await tester.pump();
    final RenderObject object = tester.firstRenderObject(find.byKey(key));

    expect(radioValue, 1);
    expect(semanticEvent, <String, dynamic>{
      'type': 'tap',
      'nodeId': object.debugSemantics.id,
      'data': <String, dynamic>{},
    });
    expect(object.debugSemantics.getSemanticsData().hasAction(SemanticsAction.tap), true);

    semantics.dispose();
    SystemChannels.accessibility.setMockMessageHandler(null);
  });
}