import 'package:eatvio_app/common/widgets/markdown_editor.dart';
import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';

void main() {
  group('MarkdownEditor', () {
    testWidgets('отображается как виджет', (WidgetTester tester) async {
      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(),
          ),
        ),
      );

      expect(find.byType(MarkdownEditor), findsOneWidget);
    });

    testWidgets('инициализируется с initialText', (WidgetTester tester) async {
      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(initialText: 'Initial text'),
          ),
        ),
      );

      expect(find.byType(MarkdownEditor), findsOneWidget);
    });

    testWidgets('отображает hintText', (WidgetTester tester) async {
      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(hintText: 'Enter text here'),
          ),
        ),
      );

      expect(find.byType(MarkdownEditor), findsOneWidget);
    });

    testWidgets('вызывает onChanged при изменении текста', (WidgetTester tester) async {
      String? changedValue;
      await tester.pumpWidget(
        MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              onChanged: (value) => changedValue = value,
            ),
          ),
        ),
      );

      final textField = find.byType(TextField);
      expect(textField, findsOneWidget);

      await tester.enterText(textField, 'Test');
      await tester.pump();

      // onChanged должен быть вызван
      expect(changedValue, isNotNull);
    });

    testWidgets('отображает toolbar когда showInlineToolbar = true', (WidgetTester tester) async {
      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(showInlineToolbar: true),
          ),
        ),
      );

      await tester.pump();
      // Toolbar должен быть виден
      expect(find.byIcon(Icons.format_bold), findsOneWidget);
    });

    testWidgets('скрывает toolbar когда showInlineToolbar = false', (WidgetTester tester) async {
      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(showInlineToolbar: false),
          ),
        ),
      );

      await tester.pump();
      // Toolbar не должен быть виден
      expect(find.byIcon(Icons.format_bold), findsNothing);
    });

    testWidgets('применяет форматирование жирным', (WidgetTester tester) async {
      String? changedValue;
      await tester.pumpWidget(
        MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              onChanged: (value) => changedValue = value,
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      final textField = find.byType(TextField);
      await tester.enterText(textField, 'Test');
      await tester.pump();

      // Нажимаем кнопку жирного
      await tester.tap(find.byIcon(Icons.format_bold));
      await tester.pump();

      expect(changedValue, isNotNull);
    });

    testWidgets('применяет форматирование курсивом', (WidgetTester tester) async {
      String? changedValue;
      await tester.pumpWidget(
        MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              onChanged: (value) => changedValue = value,
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      final textField = find.byType(TextField);
      await tester.enterText(textField, 'Test');
      await tester.pump();

      await tester.tap(find.byIcon(Icons.format_italic));
      await tester.pump();

      expect(changedValue, isNotNull);
    });

    testWidgets('применяет заголовок', (WidgetTester tester) async {
      String? changedValue;
      await tester.pumpWidget(
        MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              onChanged: (value) => changedValue = value,
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      final textField = find.byType(TextField);
      await tester.enterText(textField, 'Test');
      await tester.pump();

      // Находим кнопку заголовка (текст 'H')
      final headingButton = find.text('H');
      await tester.tap(headingButton);
      await tester.pump();

      expect(changedValue, isNotNull);
    });

    testWidgets('применяет нумерованный список', (WidgetTester tester) async {
      String? changedValue;
      await tester.pumpWidget(
        MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              onChanged: (value) => changedValue = value,
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      final textField = find.byType(TextField);
      await tester.enterText(textField, 'Test');
      await tester.pump();

      await tester.tap(find.byIcon(Icons.format_list_numbered));
      await tester.pump();

      expect(changedValue, isNotNull);
    });

    testWidgets('применяет маркированный список', (WidgetTester tester) async {
      String? changedValue;
      await tester.pumpWidget(
        MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              onChanged: (value) => changedValue = value,
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      final textField = find.byType(TextField);
      await tester.enterText(textField, 'Test');
      await tester.pump();

      await tester.tap(find.byIcon(Icons.format_list_bulleted));
      await tester.pump();

      expect(changedValue, isNotNull);
    });

    testWidgets('применяет ссылку', (WidgetTester tester) async {
      String? changedValue;
      await tester.pumpWidget(
        MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              onChanged: (value) => changedValue = value,
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      final textField = find.byType(TextField);
      await tester.enterText(textField, 'Test');
      await tester.pump();

      await tester.tap(find.byIcon(Icons.link));
      await tester.pump();

      expect(changedValue, isNotNull);
    });

    testWidgets('применяет горизонтальную линию', (WidgetTester tester) async {
      String? changedValue;
      await tester.pumpWidget(
        MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              onChanged: (value) => changedValue = value,
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      final textField = find.byType(TextField);
      await tester.enterText(textField, 'Test');
      await tester.pump();

      await tester.tap(textField);
      await tester.pump();

      await tester.tap(find.byIcon(Icons.horizontal_rule));
      await tester.pump();

      expect(changedValue, contains('---'));
    });

    testWidgets('переключает режим preview', (WidgetTester tester) async {
      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              initialText: '# Test',
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      
      // Изначально должен быть режим редактирования
      expect(find.byType(TextField), findsOneWidget);
      
      // Нажимаем кнопку preview
      await tester.tap(find.byIcon(Icons.visibility));
      await tester.pumpAndSettle();

      // Должен быть режим preview
      expect(find.byType(TextField), findsNothing);
      
      // Нажимаем кнопку редактирования
      await tester.tap(find.byIcon(Icons.edit));
      await tester.pumpAndSettle();

      // Должен вернуться режим редактирования
      expect(find.byType(TextField), findsOneWidget);
    });

    testWidgets('вызывает onToolbarVisibilityChanged при изменении видимости', (WidgetTester tester) async {
      bool? toolbarVisible;
      await tester.pumpWidget(
        MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              showInlineToolbar: true,
              onToolbarVisibilityChanged: (visible) => toolbarVisible = visible,
            ),
          ),
        ),
      );

      await tester.pumpAndSettle();
      expect(toolbarVisible, isNotNull);
    });

    testWidgets('удаляет форматирование жирным если уже применено', (WidgetTester tester) async {
      String? changedValue;
      await tester.pumpWidget(
        MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              initialText: '**Test**',
              onChanged: (value) => changedValue = value,
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      final textField = find.byType(TextField);
      await tester.tap(textField);
      await tester.pump();

      await tester.tap(find.byIcon(Icons.format_bold));
      await tester.pump();

      expect(changedValue, isNotNull);
    });

    testWidgets('обрабатывает ссылку в формате markdown', (WidgetTester tester) async {
      String? changedValue;
      await tester.pumpWidget(
        MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              initialText: '[Link](url)',
              onChanged: (value) => changedValue = value,
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      final textField = find.byType(TextField);
      await tester.tap(textField);
      await tester.pump();

      await tester.tap(find.byIcon(Icons.link));
      await tester.pump();

      expect(changedValue, isNotNull);
    });

    testWidgets('отображает preview с заголовком', (WidgetTester tester) async {
      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              initialText: '# Heading',
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      await tester.tap(find.byIcon(Icons.visibility));
      await tester.pumpAndSettle();

      // Заголовок рендерится через Text виджет
      expect(find.textContaining('Heading'), findsWidgets);
    });

    testWidgets('отображает preview с маркированным списком', (WidgetTester tester) async {
      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              initialText: '- Item 1\n- Item 2',
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      await tester.tap(find.byIcon(Icons.visibility));
      await tester.pumpAndSettle();

      // Проверяем, что preview отображается (RichText виджеты должны быть)
      expect(find.byType(RichText), findsWidgets);
      // Проверяем наличие текста через RichText
      final richTexts = find.byType(RichText);
      expect(richTexts, findsWidgets);
    });

    testWidgets('отображает preview с нумерованным списком', (WidgetTester tester) async {
      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              initialText: '1. First\n2. Second',
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      await tester.tap(find.byIcon(Icons.visibility));
      await tester.pumpAndSettle();

      // Проверяем, что preview отображается (RichText виджеты должны быть)
      expect(find.byType(RichText), findsWidgets);
    });

    testWidgets('отображает preview с горизонтальной линией', (WidgetTester tester) async {
      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              initialText: '---',
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      await tester.tap(find.byIcon(Icons.visibility));
      await tester.pumpAndSettle();

      expect(find.byType(Divider), findsOneWidget);
    });

    testWidgets('обрабатывает hasError параметр', (WidgetTester tester) async {
      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              hasError: true,
            ),
          ),
        ),
      );

      expect(find.byType(MarkdownEditor), findsOneWidget);
    });

    testWidgets('обрабатывает minLines и maxLines', (WidgetTester tester) async {
      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              minLines: 2,
              maxLines: 5,
            ),
          ),
        ),
      );

      expect(find.byType(MarkdownEditor), findsOneWidget);
    });

    testWidgets('обрабатывает heightPreview', (WidgetTester tester) async {
      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              heightPreview: 200,
              initialText: 'Test',
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      await tester.tap(find.byIcon(Icons.visibility));
      await tester.pumpAndSettle();

      expect(find.byType(MarkdownEditor), findsOneWidget);
    });

    testWidgets('обрабатывает пустой текст в preview', (WidgetTester tester) async {
      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              hintText: 'Enter text',
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      await tester.tap(find.byIcon(Icons.visibility));
      await tester.pumpAndSettle();

      expect(find.text('Enter text'), findsOneWidget);
    });

    testWidgets('обрабатывает многострочный текст с форматированием', (WidgetTester tester) async {
      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              initialText: '# Title\n\n**Bold** text\n\n- List item',
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      await tester.tap(find.byIcon(Icons.visibility));
      await tester.pumpAndSettle();

      // Проверяем, что preview отображается (должны быть Text и RichText виджеты)
      expect(find.byType(Text), findsWidgets);
      expect(find.byType(RichText), findsWidgets);
    });

    testWidgets('обрабатывает встроенное форматирование в тексте', (WidgetTester tester) async {
      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              initialText: 'This is **bold** and this is *italic*',
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      await tester.tap(find.byIcon(Icons.visibility));
      await tester.pumpAndSettle();

      // Проверяем, что preview отображается (RichText должен быть)
      expect(find.byType(RichText), findsWidgets);
    });

    testWidgets('обрабатывает ссылки в тексте', (WidgetTester tester) async {
      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              initialText: 'Check [this link](https://example.com)',
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      await tester.tap(find.byIcon(Icons.visibility));
      await tester.pumpAndSettle();

      // Проверяем, что preview отображается (RichText должен быть)
      expect(find.byType(RichText), findsWidgets);
    });

    testWidgets('обрабатывает заголовки разных уровней', (WidgetTester tester) async {
      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              initialText: '# H1\n## H2\n### H3',
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      await tester.tap(find.byIcon(Icons.visibility));
      await tester.pumpAndSettle();

      expect(find.text('H1'), findsOneWidget);
      expect(find.text('H2'), findsOneWidget);
      expect(find.text('H3'), findsOneWidget);
    });

    testWidgets('обрабатывает пустые строки в preview', (WidgetTester tester) async {
      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              initialText: 'Line 1\n\nLine 2',
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      await tester.tap(find.byIcon(Icons.visibility));
      await tester.pumpAndSettle();

      // Проверяем, что preview отображается (RichText должен быть)
      expect(find.byType(RichText), findsWidgets);
    });

    testWidgets('preview: маркер списка со звёздочкой', (WidgetTester tester) async {
      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              initialText: '* Asterisk item',
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      await tester.tap(find.byIcon(Icons.visibility));
      await tester.pumpAndSettle();

      // Тело пункта в RichText/TextSpan — find.textContaining не всегда его видит
      expect(find.byType(RichText), findsWidgets);
      expect(find.textContaining('•'), findsWidgets);
    });

    testWidgets('preview: нумерация из двух цифр', (WidgetTester tester) async {
      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              initialText: '10. Tenth row',
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      await tester.tap(find.byIcon(Icons.visibility));
      await tester.pumpAndSettle();

      expect(find.byType(RichText), findsWidgets);
      expect(find.textContaining('10.'), findsWidgets);
    });

    testWidgets(' после выхода из preview выполняется отложенный requestFocus', (WidgetTester tester) async {
      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              initialText: 'focus',
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      await tester.tap(find.byIcon(Icons.visibility));
      await tester.pumpAndSettle();
      await tester.tap(find.byIcon(Icons.edit));
      await tester.pump();
      await tester.pump(const Duration(milliseconds: 150));

      expect(find.byType(TextField), findsOneWidget);
    });

    testWidgets(' снимает разметку ссылки когда выделен markdown-link', (WidgetTester tester) async {
      String? changed;
      await tester.pumpWidget(
        MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              initialText: '[Label](https://example.com)',
              showInlineToolbar: true,
              onChanged: (v) => changed = v,
            ),
          ),
        ),
      );

      await tester.pump();

      final field = tester.widget<TextField>(find.byType(TextField));
      final controller = field.controller!;
      controller.selection = TextSelection(baseOffset: 0, extentOffset: controller.text.length);

      await tester.tap(find.byIcon(Icons.link));
      await tester.pump();

      expect(changed, contains('Label'));
      expect(changed, isNot(contains('[Label](https://example.com)')));
    });

    testWidgets('preview: H2 heading renders larger heading style', (WidgetTester tester) async {
      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              initialText: '## Subtitle',
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      await tester.tap(find.byIcon(Icons.visibility));
      await tester.pumpAndSettle();

      expect(find.text('Subtitle'), findsOneWidget);
    });

    testWidgets('preview: H3 heading renders heading text', (WidgetTester tester) async {
      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              initialText: '### Detail',
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      await tester.tap(find.byIcon(Icons.visibility));
      await tester.pumpAndSettle();

      expect(find.text('Detail'), findsOneWidget);
    });

    testWidgets('preview: horizontal rule renders Divider', (WidgetTester tester) async {
      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              initialText: 'Above\n---\nBelow',
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      await tester.tap(find.byIcon(Icons.visibility));
      await tester.pumpAndSettle();

      expect(find.byType(Divider), findsOneWidget);
    });

    testWidgets('preview: italic span renders inside RichText', (WidgetTester tester) async {
      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              initialText: 'A *cursive* word',
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      await tester.tap(find.byIcon(Icons.visibility));
      await tester.pumpAndSettle();

      expect(find.byType(RichText), findsWidgets);
    });

    testWidgets('preview: link span renders inside RichText', (WidgetTester tester) async {
      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              initialText: 'Visit [the docs](https://example.com)',
              showInlineToolbar: true,
            ),
          ),
        ),
      );

      await tester.pump();
      await tester.tap(find.byIcon(Icons.visibility));
      await tester.pumpAndSettle();

      expect(find.byType(RichText), findsWidgets);
    });

    testWidgets('toolbar buttons mutate text via onChanged when cursor is set', (WidgetTester tester) async {
      String? changed;

      await tester.pumpWidget(
        MaterialApp(
          home: Scaffold(
            body: MarkdownEditor(
              initialText: 'plain',
              showInlineToolbar: true,
              onChanged: (v) => changed = v,
            ),
          ),
        ),
      );
      await tester.pump();

      final field = tester.widget<TextField>(find.byType(TextField));
      final controller = field.controller!;
      controller.selection = const TextSelection.collapsed(offset: 0);

      await tester.tap(find.byIcon(Icons.format_bold));
      await tester.pump();
      expect(changed, contains('**'));

      controller.text = 'plain';
      controller.selection = const TextSelection.collapsed(offset: 0);
      await tester.tap(find.byIcon(Icons.format_italic));
      await tester.pump();
      expect(changed, contains('*'));

      controller.text = 'plain';
      controller.selection = const TextSelection.collapsed(offset: 0);
      await tester.tap(find.byIcon(Icons.horizontal_rule));
      await tester.pump();
      expect(changed, contains('---'));

      controller.text = 'plain';
      controller.selection = const TextSelection.collapsed(offset: 0);
      await tester.tap(find.byIcon(Icons.link));
      await tester.pump();
      expect(changed, contains('](url)'));
    });
  });
}