// 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/gestures.dart';
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter_api_samples/material/selection_area/selection_area.2.dart'
    as example;
import 'package:flutter_test/flutter_test.dart';

void main() {
  testWidgets('SelectionArea Color Text Red Example Smoke Test', (
    WidgetTester tester,
  ) async {
    await tester.pumpWidget(
      const example.SelectionAreaColorTextRedExampleApp(),
    );
    expect(
      find.widgetWithIcon(FloatingActionButton, Icons.undo),
      findsOneWidget,
    );
    expect(find.byType(Column), findsNWidgets(2));
    expect(
      find.textContaining('This is some bulleted list:\n'),
      findsOneWidget,
    );
    for (int i = 1; i <= 7; i += 1) {
      expect(find.widgetWithText(Text, '• Bullet $i'), findsOneWidget);
    }
    expect(
      find.textContaining('This is some text in a text widget.'),
      findsOneWidget,
    );
    expect(
      find.textContaining(' This is some more text in the same text widget.'),
      findsOneWidget,
    );
    expect(
      find.textContaining('This is some text in another text widget.'),
      findsOneWidget,
    );
  });

  testWidgets(
    'SelectionArea Color Text Red Example - colors selected range red',
    (WidgetTester tester) async {
      await tester.pumpWidget(
        const example.SelectionAreaColorTextRedExampleApp(),
      );
      await tester.pumpAndSettle();
      final Finder paragraph1Finder = find.descendant(
        of: find.textContaining('This is some bulleted list').first,
        matching: find.byType(RichText).first,
      );
      final Finder paragraph3Finder = find.descendant(
        of: find.textContaining('This is some text in another text widget.'),
        matching: find.byType(RichText),
      );
      final RenderParagraph paragraph1 = tester.renderObject<RenderParagraph>(
        paragraph1Finder,
      );
      final List<RenderParagraph> bullets = tester
          .renderObjectList<RenderParagraph>(
            find.descendant(
              of: find.textContaining('• Bullet'),
              matching: find.byType(RichText),
            ),
          )
          .toList();
      expect(bullets.length, 7);
      final RenderParagraph paragraph2 = tester.renderObject<RenderParagraph>(
        find.descendant(
          of: find.textContaining('This is some text in a text widget.'),
          matching: find.byType(RichText),
        ),
      );
      final RenderParagraph paragraph3 = tester.renderObject<RenderParagraph>(
        paragraph3Finder,
      );
      // Drag to select from paragraph 1 position 4 to paragraph 3 position 25.
      final TestGesture gesture = await tester.startGesture(
        tester.getRect(paragraph1Finder).topLeft + const Offset(50.0, 10.0),
        kind: PointerDeviceKind.mouse,
      );
      addTearDown(gesture.removePointer);
      await tester.pump();
      await gesture.moveTo(
        tester.getRect(paragraph3Finder).centerLeft + const Offset(360.0, 0.0),
      );
      await tester.pump();
      await gesture.up();
      await tester.pumpAndSettle();

      // Verify selection.
      // Bulleted list title.
      expect(paragraph1.selections.length, 1);
      expect(
        paragraph1.selections[0],
        const TextSelection(baseOffset: 4, extentOffset: 27),
      );
      // Bulleted list.
      for (final RenderParagraph paragraphBullet in bullets) {
        expect(paragraphBullet.selections.length, 1);
        expect(
          paragraphBullet.selections[0],
          const TextSelection(baseOffset: 0, extentOffset: 10),
        );
      }
      // Second text widget.
      expect(paragraph2.selections.length, 1);
      expect(
        paragraph2.selections[0],
        const TextSelection(baseOffset: 0, extentOffset: 83),
      );
      // Third text widget.
      expect(paragraph3.selections.length, 1);
      expect(
        paragraph3.selections[0],
        const TextSelection(baseOffset: 0, extentOffset: 25),
      );

      // Color selection red.
      expect(find.textContaining('Color Text Red'), findsOneWidget);
      await tester.tap(find.textContaining('Color Text Red'));
      await tester.pumpAndSettle();

      // Verify selection is red.
      final TextSpan paragraph1ResultingSpan = paragraph1.text as TextSpan;
      final TextSpan paragraph2ResultingSpan = paragraph2.text as TextSpan;
      final TextSpan paragraph3ResultingSpan = paragraph3.text as TextSpan;
      // Title of bulleted list is partially red.
      expect(paragraph1ResultingSpan.children, isNotNull);
      expect(paragraph1ResultingSpan.children!.length, 1);
      expect(
        (paragraph1ResultingSpan.children![0] as TextSpan).children,
        isNotNull,
      );
      expect(
        (paragraph1ResultingSpan.children![0] as TextSpan).children!.length,
        3,
      );
      expect(
        (paragraph1ResultingSpan.children![0] as TextSpan).children![0].style,
        isNull,
      );
      expect(
        (paragraph1ResultingSpan.children![0] as TextSpan).children![1],
        isA<TextSpan>(),
      );
      expect(
        ((paragraph1ResultingSpan.children![0] as TextSpan).children![1]
                as TextSpan)
            .text,
        isNotNull,
      );
      expect(
        ((paragraph1ResultingSpan.children![0] as TextSpan).children![1]
                as TextSpan)
            .text,
        ' is some bulleted list:\n',
      );
      expect(
        (paragraph1ResultingSpan.children![0] as TextSpan).children![1].style,
        isNotNull,
      );
      expect(
        (paragraph1ResultingSpan.children![0] as TextSpan)
            .children![1]
            .style!
            .color,
        isNotNull,
      );
      expect(
        (paragraph1ResultingSpan.children![0] as TextSpan)
            .children![1]
            .style!
            .color,
        Colors.red,
      );
      expect(
        (paragraph1ResultingSpan.children![0] as TextSpan).children![2],
        isA<WidgetSpan>(),
      );
      // Bullets are red.
      for (final RenderParagraph paragraphBullet in bullets) {
        final TextSpan resultingBulletSpan = paragraphBullet.text as TextSpan;
        expect(resultingBulletSpan.children, isNotNull);
        expect(resultingBulletSpan.children!.length, 1);
        expect(resultingBulletSpan.children![0], isA<TextSpan>());
        expect(
          (resultingBulletSpan.children![0] as TextSpan).children,
          isNotNull,
        );
        expect(
          (resultingBulletSpan.children![0] as TextSpan).children!.length,
          1,
        );
        expect(
          (resultingBulletSpan.children![0] as TextSpan).children![0],
          isA<TextSpan>(),
        );
        expect(
          ((resultingBulletSpan.children![0] as TextSpan).children![0]
                  as TextSpan)
              .style,
          isNotNull,
        );
        expect(
          ((resultingBulletSpan.children![0] as TextSpan).children![0]
                  as TextSpan)
              .style!
              .color,
          isNotNull,
        );
        expect(
          ((resultingBulletSpan.children![0] as TextSpan).children![0]
                  as TextSpan)
              .style!
              .color,
          Colors.red,
        );
      }
      // Second text widget is red.
      expect(paragraph2ResultingSpan.children, isNotNull);
      expect(paragraph2ResultingSpan.children!.length, 1);
      expect(paragraph2ResultingSpan.children![0], isA<TextSpan>());
      expect(
        (paragraph2ResultingSpan.children![0] as TextSpan).children,
        isNotNull,
      );
      for (final InlineSpan span
          in (paragraph2ResultingSpan.children![0] as TextSpan).children!) {
        if (span is TextSpan) {
          expect(span.style, isNotNull);
          expect(span.style!.color, isNotNull);
          expect(span.style!.color, Colors.red);
        }
      }
      // Part of third text widget is red.
      expect(paragraph3ResultingSpan.children, isNotNull);
      expect(paragraph3ResultingSpan.children!.length, 1);
      expect(paragraph3ResultingSpan.children![0], isA<TextSpan>());
      expect(
        (paragraph3ResultingSpan.children![0] as TextSpan).children,
        isNotNull,
      );
      expect(
        (paragraph3ResultingSpan.children![0] as TextSpan).children!.length,
        2,
      );
      expect(
        (paragraph3ResultingSpan.children![0] as TextSpan).children![0],
        isA<TextSpan>(),
      );
      expect(
        ((paragraph3ResultingSpan.children![0] as TextSpan).children![0]
                as TextSpan)
            .text,
        isNotNull,
      );
      expect(
        ((paragraph3ResultingSpan.children![0] as TextSpan).children![0]
                as TextSpan)
            .text,
        'This is some text in ano',
      );
      expect(
        (paragraph3ResultingSpan.children![0] as TextSpan).children![0].style,
        isNotNull,
      );
      expect(
        (paragraph3ResultingSpan.children![0] as TextSpan)
            .children![0]
            .style!
            .color,
        isNotNull,
      );
      expect(
        (paragraph3ResultingSpan.children![0] as TextSpan)
            .children![0]
            .style!
            .color,
        Colors.red,
      );
      expect(
        (paragraph3ResultingSpan.children![0] as TextSpan).children![1].style,
        isNull,
      );
    },
  );
}