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

final Matcher _matchesCommit = isMethodCall('TextInput.finishAutofillContext', arguments: true);
final Matcher _matchesCancel = isMethodCall('TextInput.finishAutofillContext', arguments: false);

void main() {
  testWidgets('AutofillGroup has the right clients', (WidgetTester tester) async {
    const outerKey = Key('outer');
    const innerKey = Key('inner');

    const client1 = TextField(autofillHints: <String>['1']);
    const client2 = TextField(autofillHints: <String>['2']);

    await tester.pumpWidget(
      const MaterialApp(
        home: Scaffold(
          body: AutofillGroup(
            key: outerKey,
            child: Column(
              children: <Widget>[
                client1,
                AutofillGroup(
                  key: innerKey,
                  child: Column(children: <Widget>[client2, TextField(autofillHints: null)]),
                ),
              ],
            ),
          ),
        ),
      ),
    );

    final AutofillGroupState innerState = tester.state<AutofillGroupState>(find.byKey(innerKey));
    final AutofillGroupState outerState = tester.state<AutofillGroupState>(find.byKey(outerKey));

    final State<TextField> clientState1 = tester.state<State<TextField>>(find.byWidget(client1));
    final State<TextField> clientState2 = tester.state<State<TextField>>(find.byWidget(client2));

    expect(outerState.autofillClients.toList(), <State<TextField>>[clientState1]);
    // The second TextField in the AutofillGroup doesn't have autofill enabled.
    expect(innerState.autofillClients.toList(), <State<TextField>>[clientState2]);
  });

  testWidgets('new clients can be added & removed to a scope', (WidgetTester tester) async {
    const scopeKey = Key('scope');

    const client1 = TextField(autofillHints: <String>['1']);
    var client2 = const TextField(autofillHints: null);

    late StateSetter setState;

    await tester.pumpWidget(
      MaterialApp(
        home: Scaffold(
          body: AutofillGroup(
            key: scopeKey,
            child: StatefulBuilder(
              builder: (BuildContext context, StateSetter setter) {
                setState = setter;
                return Column(children: <Widget>[client1, client2]);
              },
            ),
          ),
        ),
      ),
    );

    final AutofillGroupState scopeState = tester.state<AutofillGroupState>(find.byKey(scopeKey));

    final State<TextField> clientState1 = tester.state<State<TextField>>(find.byWidget(client1));
    final State<TextField> clientState2 = tester.state<State<TextField>>(find.byWidget(client2));

    expect(scopeState.autofillClients.toList(), <State<TextField>>[clientState1]);

    // Add to scope.
    setState(() {
      client2 = const TextField(autofillHints: <String>['2']);
    });

    await tester.pump();

    expect(scopeState.autofillClients, contains(clientState1));
    expect(scopeState.autofillClients, contains(clientState2));
    expect(scopeState.autofillClients.length, 2);

    // Remove from scope again.
    setState(() {
      client2 = const TextField(autofillHints: null);
    });

    await tester.pump();

    expect(scopeState.autofillClients, <State<TextField>>[clientState1]);
  });

  testWidgets('AutofillGroup has the right clients after reparenting', (WidgetTester tester) async {
    const outerKey = Key('outer');
    const innerKey = Key('inner');
    final GlobalKey keyClient3 = GlobalKey();

    const client1 = TextField(autofillHints: <String>['1']);
    const client2 = TextField(autofillHints: <String>['2']);

    await tester.pumpWidget(
      MaterialApp(
        home: Scaffold(
          body: AutofillGroup(
            key: outerKey,
            child: Column(
              children: <Widget>[
                client1,
                AutofillGroup(
                  key: innerKey,
                  child: Column(
                    children: <Widget>[
                      client2,
                      TextField(key: keyClient3, autofillHints: const <String>['3']),
                    ],
                  ),
                ),
              ],
            ),
          ),
        ),
      ),
    );

    final AutofillGroupState innerState = tester.state<AutofillGroupState>(find.byKey(innerKey));
    final AutofillGroupState outerState = tester.state<AutofillGroupState>(find.byKey(outerKey));

    final State<TextField> clientState1 = tester.state<State<TextField>>(find.byWidget(client1));
    final State<TextField> clientState2 = tester.state<State<TextField>>(find.byWidget(client2));
    final State<TextField> clientState3 = tester.state<State<TextField>>(find.byKey(keyClient3));

    await tester.pumpWidget(
      MaterialApp(
        home: Scaffold(
          body: AutofillGroup(
            key: outerKey,
            child: Column(
              children: <Widget>[
                client1,
                TextField(key: keyClient3, autofillHints: const <String>['3']),
                const AutofillGroup(
                  key: innerKey,
                  child: Column(children: <Widget>[client2]),
                ),
              ],
            ),
          ),
        ),
      ),
    );

    expect(outerState.autofillClients.length, 2);
    expect(outerState.autofillClients, contains(clientState1));
    expect(outerState.autofillClients, contains(clientState3));
    expect(innerState.autofillClients, <State<TextField>>[clientState2]);
  });

  testWidgets('disposing AutofillGroups', (WidgetTester tester) async {
    late StateSetter setState;
    const group1 = Key('group1');
    const group2 = Key('group2');
    const group3 = Key('group3');
    const placeholder = TextField(autofillHints: <String>[AutofillHints.name]);

    var children = const <Widget>[
      AutofillGroup(
        key: group1,
        child: AutofillGroup(child: placeholder),
      ),
      AutofillGroup(key: group2, onDisposeAction: AutofillContextAction.cancel, child: placeholder),
      AutofillGroup(
        key: group3,
        child: AutofillGroup(child: placeholder),
      ),
    ];

    await tester.pumpWidget(
      MaterialApp(
        home: Scaffold(
          body: StatefulBuilder(
            builder: (BuildContext context, StateSetter setter) {
              setState = setter;
              return Column(children: children);
            },
          ),
        ),
      ),
    );

    expect(tester.testTextInput.log, isNot(contains(_matchesCommit)));

    tester.testTextInput.log.clear();

    // Remove the first topmost group group1. Should commit.
    setState(() {
      children = const <Widget>[
        AutofillGroup(
          key: group2,
          onDisposeAction: AutofillContextAction.cancel,
          child: placeholder,
        ),
        AutofillGroup(
          key: group3,
          child: AutofillGroup(child: placeholder),
        ),
      ];
    });

    await tester.pump();

    expect(tester.testTextInput.log.single, _matchesCommit);

    tester.testTextInput.log.clear();

    // Remove the topmost group group2. Should cancel.
    setState(() {
      children = const <Widget>[
        AutofillGroup(
          key: group3,
          child: AutofillGroup(child: placeholder),
        ),
      ];
    });

    await tester.pump();

    expect(tester.testTextInput.log.single, _matchesCancel);

    tester.testTextInput.log.clear();

    // Remove the inner group within group3. No action.
    setState(() {
      children = const <Widget>[AutofillGroup(key: group3, child: placeholder)];
    });

    await tester.pump();

    expect(tester.testTextInput.log, isNot(contains('TextInput.finishAutofillContext')));

    tester.testTextInput.log.clear();

    // Remove the topmosts group group3. Should commit.
    setState(() {
      children = const <Widget>[];
    });

    await tester.pump();

    expect(tester.testTextInput.log.single, _matchesCommit);
  });
}