import 'dart:io';

import 'package:eatvio_app/core/app_initializer.dart';
import 'package:eatvio_app/core/app_config.dart';
import 'package:eatvio_app/core/locator_service.dart';
import 'package:eatvio_app/core/theme/theme_helper.dart';
import 'package:eatvio_app/features/create_diet/presentation/cubit/create_diet_cubit.dart';
import 'package:eatvio_app/features/feed/models/diets_pagination_model.dart';
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:flutter_dotenv/flutter_dotenv.dart';
import 'package:flutter_image_compress/flutter_image_compress.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:image/image.dart' as img;

import '../../fixtures/doubles/create_diet_doubles.dart';
import '../../fixtures/fixture_reader.dart';

void main() {
  group('Diet Creation Basic Widget Tests', () {
    late FixtureCreateDietRepository createDietRepository;
    late FixtureProfileRepository profileRepository;
    late FixtureGlossaryRepository glossaryRepository;
    late CreateDietCubit createDietCubit;
    late Map<String, dynamic> dietFixture;

    setUp(() async {
      // Initialize AppConfig for tests to enable compression bypass
      await sl.reset();
      dotenv.loadFromString(envString: 'DEV_BASE_URL=http://localhost\nBASE_URL=http://localhost');
      sl.registerLazySingleton<AppConfig>(() => AppConfig(buildType: AppBuildType.tests)..setBaseUrl('http://localhost'));
      dietFixture = FixtureReader.readAsMap('create_diet/create_diet_request.json');
      createDietRepository = FixtureCreateDietRepository();
      profileRepository = FixtureProfileRepository();
      glossaryRepository = FixtureGlossaryRepository();
      createDietCubit = CreateDietCubit(
        createDietRepository: createDietRepository,
        profileRepository: profileRepository,
        glossaryRepository: glossaryRepository,
      );
    });

    tearDown(() {
      createDietCubit.close();
    });

    Widget createTestWidget(Widget child) {
      return MaterialApp(
        theme: ThemeHelper().themeData(),
        home: BlocProvider<CreateDietCubit>(
          create: (context) => createDietCubit,
          child: Scaffold(body: SingleChildScrollView(child: child)),
        ),
      );
    }

    testWidgets('should create CreateDietCubit successfully', (WidgetTester tester) async {
      // Arrange & Act
      final cubit = CreateDietCubit(
        createDietRepository: createDietRepository,
        profileRepository: profileRepository,
        glossaryRepository: glossaryRepository,
      );

      // Assert
      expect(cubit, isA<CreateDietCubit>());
      expect(cubit.state.isLoading, isFalse);
      expect(cubit.state.isDietPublishing, isFalse);

      cubit.close();
    });

    testWidgets('should display basic diet form fields', (WidgetTester tester) async {
      // Arrange
      Widget formWidget = Column(
        children: [
          TextFormField(
            key: const Key('dietNameField'),
            decoration: const InputDecoration(labelText: 'Название диеты', hintText: 'Например: Здоровая диета'),
          ),
          const SizedBox(height: 16),
          TextFormField(
            key: const Key('dietDescriptionField'),
            decoration: const InputDecoration(labelText: 'Описание диеты'),
            maxLines: 3,
          ),
          const SizedBox(height: 16),
          DropdownButtonFormField<int>(
            key: const Key('dietDurationField'),
            decoration: const InputDecoration(labelText: 'Продолжительность'),
            items: const [
              DropdownMenuItem(value: 7, child: Text('7 дней')),
              DropdownMenuItem(value: 14, child: Text('14 дней')),
              DropdownMenuItem(value: 21, child: Text('21 день')),
            ],
            onChanged: (value) {},
          ),
          const SizedBox(height: 16),
          ElevatedButton(key: const Key('publishDietButton'), onPressed: () {}, child: const Text('Опубликовать диету')),
        ],
      );

      // Act
      await tester.pumpWidget(createTestWidget(formWidget));
      await tester.pumpAndSettle();

      // Assert
      expect(find.byKey(const Key('dietNameField')), findsOneWidget);
      expect(find.byKey(const Key('dietDescriptionField')), findsOneWidget);
      expect(find.byKey(const Key('dietDurationField')), findsOneWidget);
      expect(find.byKey(const Key('publishDietButton')), findsOneWidget);
    });

    testWidgets('should update diet name when user types in name field', (WidgetTester tester) async {
      // Arrange
      Widget formWidget = TextFormField(
        key: const Key('dietNameField'),
        decoration: const InputDecoration(labelText: 'Название диеты', hintText: 'Например: Здоровая диета'),
      );

      await tester.pumpWidget(createTestWidget(formWidget));
      await tester.pumpAndSettle();

      const testName = 'Тестовая диета';

      // Act
      await tester.enterText(find.byKey(const Key('dietNameField')), testName);
      await tester.pump();

      // Assert
      expect(find.text(testName), findsOneWidget);
    });

    testWidgets('should update diet description when user types in description field', (WidgetTester tester) async {
      // Arrange
      Widget formWidget = TextFormField(
        key: const Key('dietDescriptionField'),
        decoration: const InputDecoration(labelText: 'Описание диеты'),
        maxLines: 3,
      );

      await tester.pumpWidget(createTestWidget(formWidget));
      await tester.pumpAndSettle();

      const testDescription = 'Это тестовое описание диеты для похудения';

      // Act
      await tester.enterText(find.byKey(const Key('dietDescriptionField')), testDescription);
      await tester.pump();

      // Assert
      expect(find.text(testDescription), findsOneWidget);
    });

    testWidgets('should display diet type selection', (WidgetTester tester) async {
      // Arrange
      Widget typeWidget = Column(
        children: [
          const Text('Тип диеты'),
          const SizedBox(height: 8),
          Row(
            children: [
              Expanded(
                child: CheckboxListTile(key: const Key('veganTypeCheckbox'), title: const Text('Веганская'), value: false, onChanged: (value) {}),
              ),
              Expanded(
                child: CheckboxListTile(key: const Key('meatTypeCheckbox'), title: const Text('Мясная'), value: false, onChanged: (value) {}),
              ),
            ],
          ),
          Row(
            children: [
              Expanded(
                child: CheckboxListTile(key: const Key('carbTypeCheckbox'), title: const Text('Углеводная'), value: false, onChanged: (value) {}),
              ),
              Expanded(
                child: CheckboxListTile(key: const Key('lightTypeCheckbox'), title: const Text('Легкая'), value: false, onChanged: (value) {}),
              ),
            ],
          ),
        ],
      );

      // Act
      await tester.pumpWidget(createTestWidget(typeWidget));
      await tester.pumpAndSettle();

      // Assert
      expect(find.text('Тип диеты'), findsOneWidget);
      expect(find.byKey(const Key('veganTypeCheckbox')), findsOneWidget);
      expect(find.byKey(const Key('meatTypeCheckbox')), findsOneWidget);
      expect(find.byKey(const Key('carbTypeCheckbox')), findsOneWidget);
      expect(find.byKey(const Key('lightTypeCheckbox')), findsOneWidget);
    });

    testWidgets('should handle diet type selection', (WidgetTester tester) async {
      // Arrange
      bool veganSelected = false;
      Widget typeWidget = CheckboxListTile(
        key: const Key('veganTypeCheckbox'),
        title: const Text('Веганская'),
        value: veganSelected,
        onChanged: (value) {
          veganSelected = value ?? false;
        },
      );

      await tester.pumpWidget(createTestWidget(typeWidget));
      await tester.pumpAndSettle();

      // Act
      await tester.tap(find.byKey(const Key('veganTypeCheckbox')));
      await tester.pump();

      // Assert
      expect(veganSelected, isTrue);
    });

    testWidgets('should display diet duration dropdown', (WidgetTester tester) async {
      // Arrange
      Widget durationWidget = DropdownButtonFormField<int>(
        key: const Key('dietDurationField'),
        decoration: const InputDecoration(labelText: 'Продолжительность диеты'),
        items: const [
          DropdownMenuItem(value: 7, child: Text('7 дней')),
          DropdownMenuItem(value: 14, child: Text('14 дней')),
          DropdownMenuItem(value: 21, child: Text('21 день')),
          DropdownMenuItem(value: 30, child: Text('30 дней')),
        ],
        onChanged: (value) {},
      );

      // Act
      await tester.pumpWidget(createTestWidget(durationWidget));
      await tester.pumpAndSettle();

      // Assert
      expect(find.byKey(const Key('dietDurationField')), findsOneWidget);
      expect(find.text('Продолжительность диеты'), findsOneWidget);
    });

    testWidgets('should display diet status dropdown', (WidgetTester tester) async {
      // Arrange
      Widget statusWidget = DropdownButtonFormField<String>(
        key: const Key('dietStatusField'),
        decoration: const InputDecoration(labelText: 'Статус диеты'),
        items: const [
          DropdownMenuItem(value: 'active', child: Text('Активная')),
          DropdownMenuItem(value: 'draft', child: Text('Черновик')),
          DropdownMenuItem(value: 'personal', child: Text('Личная')),
        ],
        onChanged: (value) {},
      );

      // Act
      await tester.pumpWidget(createTestWidget(statusWidget));
      await tester.pumpAndSettle();

      // Assert
      expect(find.byKey(const Key('dietStatusField')), findsOneWidget);
      expect(find.text('Статус диеты'), findsOneWidget);
    });

    testWidgets('should display form labels correctly', (WidgetTester tester) async {
      // Arrange
      Widget formWidget = const Column(
        children: [Text('Название диеты'), Text('Описание диеты'), Text('Продолжительность'), Text('Тип диеты'), Text('Статус')],
      );

      // Act
      await tester.pumpWidget(createTestWidget(formWidget));
      await tester.pumpAndSettle();

      // Assert
      expect(find.text('Название диеты'), findsOneWidget);
      expect(find.text('Описание диеты'), findsOneWidget);
      expect(find.text('Продолжительность'), findsOneWidget);
      expect(find.text('Тип диеты'), findsOneWidget);
      expect(find.text('Статус'), findsOneWidget);
    });

    testWidgets('should display placeholder text in name field', (WidgetTester tester) async {
      // Arrange
      Widget formWidget = TextFormField(
        key: const Key('dietNameField'),
        decoration: const InputDecoration(labelText: 'Название диеты', hintText: 'Например: Здоровая диета'),
      );

      // Act
      await tester.pumpWidget(createTestWidget(formWidget));
      await tester.pumpAndSettle();

      // Assert
      expect(find.text('Например: Здоровая диета'), findsOneWidget);
    });

    testWidgets('should display publish button', (WidgetTester tester) async {
      // Arrange
      Widget buttonWidget = ElevatedButton(key: const Key('publishDietButton'), onPressed: () {}, child: const Text('Опубликовать диету'));

      // Act
      await tester.pumpWidget(createTestWidget(buttonWidget));
      await tester.pumpAndSettle();

      // Assert
      expect(find.byKey(const Key('publishDietButton')), findsOneWidget);
      expect(find.text('Опубликовать диету'), findsOneWidget);
    });

    testWidgets('should handle publish button tap', (WidgetTester tester) async {
      // Arrange
      bool buttonPressed = false;
      Widget buttonWidget = ElevatedButton(
        key: const Key('publishDietButton'),
        onPressed: () {
          buttonPressed = true;
        },
        child: const Text('Опубликовать диету'),
      );

      await tester.pumpWidget(createTestWidget(buttonWidget));
      await tester.pumpAndSettle();

      // Act
      await tester.tap(find.byKey(const Key('publishDietButton')));
      await tester.pump();

      // Assert
      expect(buttonPressed, isTrue);
    });

    testWidgets('should display loading state', (WidgetTester tester) async {
      // Arrange
      Widget loadingWidget = const Center(child: CircularProgressIndicator());

      // Act
      await tester.pumpWidget(createTestWidget(loadingWidget));
      await tester.pump();

      // Assert
      expect(find.byType(CircularProgressIndicator), findsOneWidget);
    });

    testWidgets('should display error message', (WidgetTester tester) async {
      // Arrange
      Widget errorWidget = const Center(child: Text('Произошла ошибка при создании диеты'));

      // Act
      await tester.pumpWidget(createTestWidget(errorWidget));
      await tester.pumpAndSettle();

      // Assert
      expect(find.text('Произошла ошибка при создании диеты'), findsOneWidget);
    });

    testWidgets('should display success message', (WidgetTester tester) async {
      // Arrange
      Widget successWidget = const Center(child: Text('Диета успешно создана!'));

      // Act
      await tester.pumpWidget(createTestWidget(successWidget));
      await tester.pumpAndSettle();

      // Assert
      expect(find.text('Диета успешно создана!'), findsOneWidget);
    });

    testWidgets('should validate required fields', (WidgetTester tester) async {
      // Arrange
      Widget validationWidget = Column(
        children: [
          TextFormField(
            key: const Key('dietNameField'),
            decoration: const InputDecoration(labelText: 'Название диеты', errorText: 'Название диеты обязательно'),
          ),
          const SizedBox(height: 16),
          TextFormField(
            key: const Key('dietDescriptionField'),
            decoration: const InputDecoration(labelText: 'Описание диеты', errorText: 'Описание диеты обязательно'),
          ),
        ],
      );

      // Act
      await tester.pumpWidget(createTestWidget(validationWidget));
      await tester.pumpAndSettle();

      // Assert
      expect(find.text('Название диеты обязательно'), findsOneWidget);
      expect(find.text('Описание диеты обязательно'), findsOneWidget);
    });

    testWidgets('should display complete diet creation form', (WidgetTester tester) async {
      // Arrange
      Widget completeForm = Column(
        children: [
          TextFormField(
            key: const Key('dietNameField'),
            decoration: const InputDecoration(labelText: 'Название диеты', hintText: 'Например: Здоровая диета'),
          ),
          const SizedBox(height: 16),
          TextFormField(
            key: const Key('dietDescriptionField'),
            decoration: const InputDecoration(labelText: 'Описание диеты'),
            maxLines: 3,
          ),
          const SizedBox(height: 16),
          DropdownButtonFormField<int>(
            key: const Key('dietDurationField'),
            decoration: const InputDecoration(labelText: 'Продолжительность'),
            items: const [
              DropdownMenuItem(value: 7, child: Text('7 дней')),
              DropdownMenuItem(value: 14, child: Text('14 дней')),
              DropdownMenuItem(value: 21, child: Text('21 день')),
            ],
            onChanged: (value) {},
          ),
          const SizedBox(height: 16),
          DropdownButtonFormField<String>(
            key: const Key('dietStatusField'),
            decoration: const InputDecoration(labelText: 'Статус диеты'),
            items: const [
              DropdownMenuItem(value: 'active', child: Text('Активная')),
              DropdownMenuItem(value: 'draft', child: Text('Черновик')),
            ],
            onChanged: (value) {},
          ),
          const SizedBox(height: 32),
          ElevatedButton(key: const Key('publishDietButton'), onPressed: () {}, child: const Text('Опубликовать диету')),
        ],
      );

      // Act
      await tester.pumpWidget(createTestWidget(completeForm));
      await tester.pumpAndSettle();

      // Assert
      expect(find.byKey(const Key('dietNameField')), findsOneWidget);
      expect(find.byKey(const Key('dietDescriptionField')), findsOneWidget);
      expect(find.byKey(const Key('dietDurationField')), findsOneWidget);
      expect(find.byKey(const Key('dietStatusField')), findsOneWidget);
      expect(find.byKey(const Key('publishDietButton')), findsOneWidget);
    });

    testWidgets('should display diet type options', (WidgetTester tester) async {
      // Arrange
      Widget typeOptionsWidget = const Column(
        children: [
          Text('Выберите тип диеты:'),
          SizedBox(height: 8),
          Text('• Веганская - без продуктов животного происхождения'),
          Text('• Мясная - с мясными продуктами'),
          Text('• Углеводная - с высоким содержанием углеводов'),
          Text('• Легкая - низкокалорийная диета'),
        ],
      );

      // Act
      await tester.pumpWidget(createTestWidget(typeOptionsWidget));
      await tester.pumpAndSettle();

      // Assert
      expect(find.text('Выберите тип диеты:'), findsOneWidget);
      expect(find.text('• Веганская - без продуктов животного происхождения'), findsOneWidget);
      expect(find.text('• Мясная - с мясными продуктами'), findsOneWidget);
      expect(find.text('• Углеводная - с высоким содержанием углеводов'), findsOneWidget);
      expect(find.text('• Легкая - низкокалорийная диета'), findsOneWidget);
    });

    testWidgets('should display diet duration options', (WidgetTester tester) async {
      // Arrange
      Widget durationOptionsWidget = const Column(
        children: [
          Text('Доступные продолжительности:'),
          SizedBox(height: 8),
          Text('• 7 дней - недельная диета'),
          Text('• 14 дней - двухнедельная диета'),
          Text('• 21 день - трехнедельная диета'),
          Text('• 30 дней - месячная диета'),
        ],
      );

      // Act
      await tester.pumpWidget(createTestWidget(durationOptionsWidget));
      await tester.pumpAndSettle();

      // Assert
      expect(find.text('Доступные продолжительности:'), findsOneWidget);
      expect(find.text('• 7 дней - недельная диета'), findsOneWidget);
      expect(find.text('• 14 дней - двухнедельная диета'), findsOneWidget);
      expect(find.text('• 21 день - трехнедельная диета'), findsOneWidget);
      expect(find.text('• 30 дней - месячная диета'), findsOneWidget);
    });

    testWidgets('should send correct request when creating diet', (WidgetTester tester) async {
      // Arrange
      // Create a valid JPEG file using image package (100x100 pixel image)
      final testImage = img.Image(width: 100, height: 100);
      img.fill(testImage, color: img.ColorRgb8(128, 128, 128));
      final jpegBytes = img.encodeJpg(testImage, quality: 85);
      final tempFile = File('${Directory.systemTemp.path}/test_image_${DateTime.now().millisecondsSinceEpoch}.jpg');
      await tempFile.writeAsBytes(jpegBytes);
      final xFile = XFile(tempFile.path);
      
      createDietCubit.setName(dietFixture['name'] as String);
      createDietCubit.setDetails(dietFixture['details'] as String);
      createDietCubit.setDuration(0); // 7 days - this creates dailySchedule with 7 days
      createDietCubit.setDietState(DietState.draft);
      
      final types = dietFixture['types'] as Map<String, dynamic>;
      createDietCubit.setDietType(key: 'meat', value: types['meat'] as bool);
      createDietCubit.setDietType(key: 'carb', value: types['carb'] as bool);
      createDietCubit.setDietType(key: 'veg', value: types['veg'] as bool);
      createDietCubit.setDietType(key: 'light', value: types['light'] as bool);
      
      // Add at least one product to each day to pass validation
      final glossaryResults = await glossaryRepository.getGlossaryListByQuery('test');
      if (glossaryResults.isNotEmpty) {
        final product = glossaryResults.first;
        final dailySchedule = DailySchedule(
          name: product.name,
          portion: Portion.grams,
          quantity: product.grInPortion,
          productNutritionalValueId: product.id.toString(),
        );
        // Add product to first meal of first day for all 7 days
        for (int day = 0; day < 7; day++) {
          createDietCubit.addPortion(dayIndex: day, mealIndex: 0, portion: dailySchedule);
        }
      }
      
      createDietCubit.setImage(xFile, imageUrl: null);
      
      // Act
      final result = await createDietCubit.createDiet().timeout(
        const Duration(seconds: 10),
      );
      await tester.pump(); // Allow state changes to propagate
      await tester.pump(); // Additional pump for any delayed updates

      // Assert
      expect(result, isNull); // Should return null on success
      expect(createDietRepository.createRequests.length, 1);
      final request = createDietRepository.createRequests.single;
      expect(request['name'], dietFixture['name']);
      expect(request['details'], dietFixture['details']);
      expect(request['duration'], dietFixture['duration']);
      expect(request['state'], dietFixture['state']);
      expect(request['types'], dietFixture['types']);
      
      // Cleanup - remove original and compressed files
      if (await tempFile.exists()) {
        await tempFile.delete();
      }
      // ImageCompressUtility creates compressed file with _compressed suffix
      final filePathWithoutExtension = tempFile.path.replaceAll(RegExp(r'\.(jpg|jpeg)$', caseSensitive: false), '');
      final compressedFile = File('${filePathWithoutExtension}_compressed.jpg');
      if (await compressedFile.exists()) {
        await compressedFile.delete();
      }
    });
  });
}