// 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/services.dart';
import 'package:flutter_test/flutter_test.dart';

import 'text_input_utils.dart';

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  group('AutofillClient', () {
    late FakeTextChannel fakeTextChannel;
    final FakeAutofillScope scope = FakeAutofillScope();

    setUp(() {
      fakeTextChannel = FakeTextChannel((MethodCall call) async {});
      TextInput.setChannel(fakeTextChannel);
      scope.clients.clear();
    });

    tearDown(() {
      TextInputConnection.debugResetId();
      TextInput.setChannel(SystemChannels.textInput);
    });

    test('Does not throw if the hint list is empty', () async {
      Object? exception;
      try {
        const AutofillConfiguration(
          uniqueIdentifier: 'id',
          autofillHints: <String>[],
          currentEditingValue: TextEditingValue.empty,
        );
      } catch (e) {
        exception = e;
      }

      expect(exception, isNull);
    });

    test(
      'AutofillClients send the correct configuration to the platform and responds to updateEditingStateWithTag method correctly',
      () async {
        final FakeAutofillClient client1 = FakeAutofillClient(const TextEditingValue(text: 'test1'));
        final FakeAutofillClient client2 = FakeAutofillClient(const TextEditingValue(text: 'test2'));

        client1.textInputConfiguration = TextInputConfiguration(
          autofillConfiguration: AutofillConfiguration(
            uniqueIdentifier: client1.autofillId,
            autofillHints: const <String>['client1'],
            currentEditingValue: client1.currentTextEditingValue,
          ),
        );

        client2.textInputConfiguration = TextInputConfiguration(
          autofillConfiguration: AutofillConfiguration(
            uniqueIdentifier: client2.autofillId,
            autofillHints: const <String>['client2'],
            currentEditingValue: client2.currentTextEditingValue,
          ),
        );

        scope.register(client1);
        scope.register(client2);
        client1.currentAutofillScope = scope;
        client2.currentAutofillScope = scope;

        scope.attach(client1, client1.textInputConfiguration);

        final Map<String, dynamic> expectedConfiguration = client1.textInputConfiguration.toJson();
        expectedConfiguration['fields'] = <Map<String, dynamic>>[
          client1.textInputConfiguration.toJson(),
          client2.textInputConfiguration.toJson(),
        ];

        fakeTextChannel.validateOutgoingMethodCalls(<MethodCall>[
          MethodCall('TextInput.setClient', <dynamic>[1, expectedConfiguration]),
        ]);

        const TextEditingValue text2 = TextEditingValue(text: 'Text 2');
        fakeTextChannel.incoming?.call(MethodCall(
          'TextInputClient.updateEditingStateWithTag',
          <dynamic>[0, <String, dynamic>{ client2.autofillId : text2.toJSON() }],
        ));

        expect(client2.currentTextEditingValue, text2);
      },
    );
  });
}

class FakeAutofillClient implements TextInputClient, AutofillClient {
  FakeAutofillClient(this.currentTextEditingValue);

  @override
  String get autofillId => hashCode.toString();

  @override
  late TextInputConfiguration textInputConfiguration;

  @override
  void updateEditingValue(TextEditingValue newEditingValue) {
    currentTextEditingValue = newEditingValue;
    latestMethodCall = 'updateEditingValue';
  }

  @override
  AutofillScope? currentAutofillScope;

  String latestMethodCall = '';

  @override
  TextEditingValue currentTextEditingValue;

  @override
  void performAction(TextInputAction action) {
    latestMethodCall = 'performAction';
  }

  @override
  void performPrivateCommand(String action, Map<String, dynamic> data) {
    latestMethodCall = 'performPrivateCommand';
  }

  @override
  void updateFloatingCursor(RawFloatingCursorPoint point) {
    latestMethodCall = 'updateFloatingCursor';
  }

  @override
  void connectionClosed() {
    latestMethodCall = 'connectionClosed';
  }

  @override
  void showAutocorrectionPromptRect(int start, int end) {
    latestMethodCall = 'showAutocorrectionPromptRect';
  }

  @override
  void autofill(TextEditingValue newEditingValue) => updateEditingValue(newEditingValue);

  @override
  void showToolbar() {
    latestMethodCall = 'showToolbar';
  }

  @override
  void insertTextPlaceholder(Size size) {
    latestMethodCall = 'insertTextPlaceholder';
  }

  @override
  void removeTextPlaceholder() {
    latestMethodCall = 'removeTextPlaceholder';
  }

  @override
  void performSelector(String selectorName) {
    latestMethodCall = 'performSelector';
  }
}

class FakeAutofillScope with AutofillScopeMixin implements AutofillScope {
  final Map<String, AutofillClient> clients = <String, AutofillClient>{};

  @override
  Iterable<AutofillClient> get autofillClients => clients.values;

  @override
  AutofillClient getAutofillClient(String autofillId) => clients[autofillId]!;

  void register(AutofillClient client) {
    clients.putIfAbsent(client.autofillId, () => client);
  }
}