import 'package:eatvio_app/core/models/pagination_model.dart';
import 'package:eatvio_app/features/feed/models/diets_pagination_model.dart';
import 'package:eatvio_app/features/feed/models/feed_blog_post_model.dart';
import 'package:eatvio_app/features/feed/models/feed_blog_post_settings_model.dart';
import 'package:eatvio_app/features/feed/presentation/bloc/feed_cubit/feed_cubit.dart';
import 'package:eatvio_app/features/feed/presentation/bloc/feed_cubit/feed_state.dart';
import 'package:eatvio_app/features/feed/repositories/feed_repository.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:mockito/annotations.dart';
import 'package:mockito/mockito.dart';
import 'feed_cubit_test.mocks.dart';

@GenerateNiceMocks([MockSpec<FeedRepository>()])
void main() {
  group('FeedCubit', () {
    FeedCubit? feedCubit;
    late MockFeedRepository mockFeedRepository;

    final testBlogPost = FeedBlogPostModel(
      id: 1,
      title: 'Test Post',
      description: 'Test description',
      image: 'https://example.com/image.jpg',
      state: 'published',
      author: const Author(authorSlug: 'author-1', authorName: 'Author Name', authorProfileIcon: 'https://example.com/icon.jpg', authorIsMe: false),
      videoUrl: 'https://example.com/video.mp4',
      createdAt: DateTime(2024, 1, 15),
      updatedAt: DateTime(2024, 1, 15),
      totalLikes: 10,
      totalViews: 100,
      totalComments: 5,
      wasLikedByMe: false,
    );

    final testBlogPost2 = FeedBlogPostModel(
      id: 2,
      title: 'Test Post 2',
      description: 'Test description 2',
      image: 'https://example.com/image2.jpg',
      state: 'published',
      author: const Author(authorSlug: 'author-2', authorName: 'Author Name 2', authorProfileIcon: 'https://example.com/icon2.jpg', authorIsMe: false),
      videoUrl: 'https://example.com/video2.mp4',
      createdAt: DateTime(2024, 1, 16),
      updatedAt: DateTime(2024, 1, 16),
      totalLikes: 20,
      totalViews: 200,
      totalComments: 10,
      wasLikedByMe: true,
    );

    setUp(() {
      mockFeedRepository = MockFeedRepository();
    });

    tearDown(() async {
      if (feedCubit != null && !feedCubit!.isClosed) {
        await Future.delayed(const Duration(milliseconds: 100));
        feedCubit!.close();
        feedCubit = null;
      }
    });

    test('начальное состояние - loading', () {
      feedCubit = FeedCubit(feedRepository: mockFeedRepository);
      expect(feedCubit!.state, const FeedState.loading());
    });

    test('loadFeedBlogPostList - успешно загружает список постов', () async {
      feedCubit = FeedCubit(feedRepository: mockFeedRepository);
      final expectedSettings = FeedBlogPostSettingsModel(
        feedBlogPostList: [testBlogPost],
        meta: const Meta(currentPage: 1, lastPage: 3, total: 3, perPage: 10, from: null, links: [Link(url: null, label: null, active: null)], to: null),
      );

      when(mockFeedRepository.getFeedBlogPosts(query: null)).thenAnswer((_) async => expectedSettings);

      await feedCubit!.loadFeedBlogPostList();
      await Future.delayed(const Duration(milliseconds: 100));

      expect(feedCubit!.state, isA<FeedStateLoaded>());
      final loadedState = feedCubit!.state as FeedStateLoaded;
      expect(loadedState.feedBlogPostList.length, 1);
      expect(loadedState.feedBlogPostList.first.id, 1);
      expect(loadedState.isLoading, false);
      expect(feedCubit!.lastPage, 3);
      verify(mockFeedRepository.getFeedBlogPosts(query: null)).called(1);
    });

    test('loadFeedBlogPostList - загружает список постов с query', () async {
      feedCubit = FeedCubit(feedRepository: mockFeedRepository);
      const query = 'test query';
      final expectedSettings = FeedBlogPostSettingsModel(
        feedBlogPostList: [testBlogPost, testBlogPost2],
        meta: const Meta(currentPage: 1, lastPage: 1, total: 2, perPage: 10, from: null, links: [Link(url: null, label: null, active: null)], to: null),
      );

      when(mockFeedRepository.getFeedBlogPosts(query: query)).thenAnswer((_) async => expectedSettings);

      await feedCubit!.loadFeedBlogPostList(query: query);
      await Future.delayed(const Duration(milliseconds: 100));

      expect(feedCubit!.state, isA<FeedStateLoaded>());
      final loadedState = feedCubit!.state as FeedStateLoaded;
      expect(loadedState.feedBlogPostList.length, 2);
      verify(mockFeedRepository.getFeedBlogPosts(query: query)).called(1);
    });

    test('loadFeedBlogPostList - обрабатывает ошибку', () async {
      feedCubit = FeedCubit(feedRepository: mockFeedRepository);
      final exception = Exception('Network error');

      when(mockFeedRepository.getFeedBlogPosts(query: null)).thenThrow(exception);

      await feedCubit!.loadFeedBlogPostList();
      await Future.delayed(const Duration(milliseconds: 100));

      expect(feedCubit!.state, isA<FeedStateError>());
      final errorState = feedCubit!.state as FeedStateError;
      expect(errorState.errorMessage, contains('Exception: Network error'));
    });

    test('loadNextPage - загружает следующую страницу', () async {
      feedCubit = FeedCubit(feedRepository: mockFeedRepository);
      final firstPageSettings = FeedBlogPostSettingsModel(
        feedBlogPostList: [testBlogPost],
        meta: const Meta(currentPage: 1, lastPage: 3, total: 3, perPage: 10, from: null, links: [Link(url: null, label: null, active: null)], to: null),
      );

      final secondPageSettings = FeedBlogPostSettingsModel(
        feedBlogPostList: [testBlogPost2],
        meta: const Meta(currentPage: 2, lastPage: 3, total: 3, perPage: 10, from: null, links: [Link(url: null, label: null, active: null)], to: null),
      );

      when(mockFeedRepository.getFeedBlogPosts(query: null)).thenAnswer((_) async => firstPageSettings);

      await feedCubit!.loadFeedBlogPostList();
      await Future.delayed(const Duration(milliseconds: 100));

      when(mockFeedRepository.getFeedBlogPosts(page: 2, query: null)).thenAnswer((_) async => secondPageSettings);

      await feedCubit!.loadNextPage();
      await Future.delayed(const Duration(milliseconds: 100));

      expect(feedCubit!.state, isA<FeedStateLoaded>());
      final loadedState = feedCubit!.state as FeedStateLoaded;
      expect(loadedState.feedBlogPostList.length, 2);
      expect(feedCubit!.currentPage, 2);
      expect(loadedState.isLoading, false);
      verify(mockFeedRepository.getFeedBlogPosts(page: 2, query: null)).called(1);
    });

    test('loadNextPage - не загружает если уже на последней странице', () async {
      feedCubit = FeedCubit(feedRepository: mockFeedRepository);
      final settings = FeedBlogPostSettingsModel(
        feedBlogPostList: [testBlogPost],
        meta: const Meta(currentPage: 1, lastPage: 1, total: 1, perPage: 10, from: null, links: [Link(url: null, label: null, active: null)], to: null),
      );

      when(mockFeedRepository.getFeedBlogPosts(query: null)).thenAnswer((_) async => settings);

      await feedCubit!.loadFeedBlogPostList();
      await Future.delayed(const Duration(milliseconds: 100));

      await feedCubit!.loadNextPage();
      await Future.delayed(const Duration(milliseconds: 100));

      verifyNever(mockFeedRepository.getFeedBlogPosts(page: 2, query: anyNamed('query')));
    });

    test('loadNextPage - не загружает если уже загружается', () async {
      feedCubit = FeedCubit(feedRepository: mockFeedRepository);
      final settings = FeedBlogPostSettingsModel(
        feedBlogPostList: [testBlogPost],
        meta: const Meta(currentPage: 1, lastPage: 3, total: 3, perPage: 10, from: null, links: [Link(url: null, label: null, active: null)], to: null),
      );

      when(mockFeedRepository.getFeedBlogPosts(query: null)).thenAnswer((_) async => settings);

      await feedCubit!.loadFeedBlogPostList();
      await Future.delayed(const Duration(milliseconds: 100));

      feedCubit!.isLoading = true;

      await feedCubit!.loadNextPage();
      await Future.delayed(const Duration(milliseconds: 100));

      verifyNever(mockFeedRepository.getFeedBlogPosts(page: 2, query: anyNamed('query')));
    });

    test('loadNextPage - обрабатывает ошибку при загрузке следующей страницы', () async {
      feedCubit = FeedCubit(feedRepository: mockFeedRepository);
      final firstPageSettings = FeedBlogPostSettingsModel(
        feedBlogPostList: [testBlogPost],
        meta: const Meta(currentPage: 1, lastPage: 3, total: 3, perPage: 10, from: null, links: [Link(url: null, label: null, active: null)], to: null),
      );

      when(mockFeedRepository.getFeedBlogPosts(query: null)).thenAnswer((_) async => firstPageSettings);

      await feedCubit!.loadFeedBlogPostList();
      await Future.delayed(const Duration(milliseconds: 100));

      final exception = Exception('Network error');
      when(mockFeedRepository.getFeedBlogPosts(page: 2, query: null)).thenThrow(exception);

      await feedCubit!.loadNextPage();
      await Future.delayed(const Duration(milliseconds: 100));

      expect(feedCubit!.state, isA<FeedStateError>());
      final errorState = feedCubit!.state as FeedStateError;
      expect(errorState.errorMessage, contains('Exception: Network error'));
    });

    test('loadNextPage - сохраняет query при загрузке следующей страницы', () async {
      feedCubit = FeedCubit(feedRepository: mockFeedRepository);
      const query = 'test query';
      final firstPageSettings = FeedBlogPostSettingsModel(
        feedBlogPostList: [testBlogPost],
        meta: const Meta(currentPage: 1, lastPage: 3, total: 3, perPage: 10, from: null, links: [Link(url: null, label: null, active: null)], to: null),
      );

      final secondPageSettings = FeedBlogPostSettingsModel(
        feedBlogPostList: [testBlogPost2],
        meta: const Meta(currentPage: 2, lastPage: 3, total: 3, perPage: 10, from: null, links: [Link(url: null, label: null, active: null)], to: null),
      );

      when(mockFeedRepository.getFeedBlogPosts(query: query)).thenAnswer((_) async => firstPageSettings);

      await feedCubit!.loadFeedBlogPostList(query: query);
      await Future.delayed(const Duration(milliseconds: 100));

      when(mockFeedRepository.getFeedBlogPosts(page: 2, query: query)).thenAnswer((_) async => secondPageSettings);

      await feedCubit!.loadNextPage();
      await Future.delayed(const Duration(milliseconds: 100));

      verify(mockFeedRepository.getFeedBlogPosts(page: 2, query: query)).called(1);
    });

    test('updateFeedBlogPostList - обновляет лайк поста', () async {
      feedCubit = FeedCubit(feedRepository: mockFeedRepository);
      final settings = FeedBlogPostSettingsModel(
        feedBlogPostList: [testBlogPost],
        meta: const Meta(currentPage: 1, lastPage: 1, total: 1, perPage: 10, from: null, links: [Link(url: null, label: null, active: null)], to: null),
      );

      when(mockFeedRepository.getFeedBlogPosts(query: null)).thenAnswer((_) async => settings);

      await feedCubit!.loadFeedBlogPostList();
      await Future.delayed(const Duration(milliseconds: 100));

      feedCubit!.updateFeedBlogPostList(testBlogPost, true);
      await Future.delayed(const Duration(milliseconds: 100));

      expect(feedCubit!.state, isA<FeedStateLoaded>());
      final loadedState = feedCubit!.state as FeedStateLoaded;
      expect(loadedState.feedBlogPostList.first.wasLikedByMe, true);
      expect(loadedState.feedBlogPostList.first.totalLikes, 11);
    });

    test('updateFeedBlogPostList - убирает лайк поста', () async {
      feedCubit = FeedCubit(feedRepository: mockFeedRepository);
      final settings = FeedBlogPostSettingsModel(
        feedBlogPostList: [testBlogPost2],
        meta: const Meta(currentPage: 1, lastPage: 1, total: 1, perPage: 10, from: null, links: [Link(url: null, label: null, active: null)], to: null),
      );

      when(mockFeedRepository.getFeedBlogPosts(query: null)).thenAnswer((_) async => settings);

      await feedCubit!.loadFeedBlogPostList();
      await Future.delayed(const Duration(milliseconds: 100));

      feedCubit!.updateFeedBlogPostList(testBlogPost2, false);
      await Future.delayed(const Duration(milliseconds: 100));

      expect(feedCubit!.state, isA<FeedStateLoaded>());
      final loadedState = feedCubit!.state as FeedStateLoaded;
      expect(loadedState.feedBlogPostList.first.wasLikedByMe, false);
      expect(loadedState.feedBlogPostList.first.totalLikes, 19);
    });

    test('updateFeedBlogPostList - не обновляет если пост не найден', () async {
      feedCubit = FeedCubit(feedRepository: mockFeedRepository);
      final settings = FeedBlogPostSettingsModel(
        feedBlogPostList: [testBlogPost],
        meta: const Meta(currentPage: 1, lastPage: 1, total: 1, perPage: 10, from: null, links: [Link(url: null, label: null, active: null)], to: null),
      );

      when(mockFeedRepository.getFeedBlogPosts(query: null)).thenAnswer((_) async => settings);

      await feedCubit!.loadFeedBlogPostList();
      await Future.delayed(const Duration(milliseconds: 100));

      final nonExistentPost = testBlogPost.copyWith(id: 999);
      final initialState = feedCubit!.state;
      feedCubit!.updateFeedBlogPostList(nonExistentPost, true);
      await Future.delayed(const Duration(milliseconds: 100));

      expect(feedCubit!.state, initialState);
    });

    test('updateFeedBlogPostList - не обновляет если state не loaded', () {
      feedCubit = FeedCubit(feedRepository: mockFeedRepository);
      feedCubit!.updateFeedBlogPostList(testBlogPost, true);
      expect(feedCubit!.state, const FeedState.loading());
    });

    test('updateFeedBlogPostList - не обновляет если post null', () async {
      feedCubit = FeedCubit(feedRepository: mockFeedRepository);
      final settings = FeedBlogPostSettingsModel(
        feedBlogPostList: [testBlogPost],
        meta: const Meta(currentPage: 1, lastPage: 1, total: 1, perPage: 10, from: null, links: [Link(url: null, label: null, active: null)], to: null),
      );

      when(mockFeedRepository.getFeedBlogPosts(query: null)).thenAnswer((_) async => settings);

      await feedCubit!.loadFeedBlogPostList();
      await Future.delayed(const Duration(milliseconds: 100));

      final initialState = feedCubit!.state;
      feedCubit!.updateFeedBlogPostList(null, true);
      await Future.delayed(const Duration(milliseconds: 100));

      expect(feedCubit!.state, initialState);
    });

    test('likePost - лайкает пост', () async {
      feedCubit = FeedCubit(feedRepository: mockFeedRepository);
      const postId = 1;

      when(mockFeedRepository.likeBlogPost(id: postId)).thenAnswer((_) async => Future.value());

      await feedCubit!.likePost(postId);

      verify(mockFeedRepository.likeBlogPost(id: postId)).called(1);
    });

    test('likePost - обрабатывает ошибку без выбрасывания', () async {
      feedCubit = FeedCubit(feedRepository: mockFeedRepository);
      const postId = 1;
      final exception = Exception('Network error');

      when(mockFeedRepository.likeBlogPost(id: postId)).thenThrow(exception);

      await feedCubit!.likePost(postId);

      verify(mockFeedRepository.likeBlogPost(id: postId)).called(1);
    });

    test('unlikedPost - убирает лайк с поста', () async {
      feedCubit = FeedCubit(feedRepository: mockFeedRepository);
      const postId = 1;

      when(mockFeedRepository.unlikedBlogPost(id: postId)).thenAnswer((_) async => Future.value());

      await feedCubit!.unlikedPost(postId);

      verify(mockFeedRepository.unlikedBlogPost(id: postId)).called(1);
    });

    test('viewPost - отправляет просмотр поста', () async {
      feedCubit = FeedCubit(feedRepository: mockFeedRepository);
      const postId = 1;

      when(mockFeedRepository.viewPost(postId)).thenAnswer((_) async => Future.value());

      await feedCubit!.viewPost(postId);

      verify(mockFeedRepository.viewPost(postId)).called(1);
    });

    test('viewRecipe - отправляет просмотр рецепта', () async {
      feedCubit = FeedCubit(feedRepository: mockFeedRepository);
      const slug = 'recipe-1';

      when(mockFeedRepository.viewRecipe(slug)).thenAnswer((_) async => Future.value());

      await feedCubit!.viewRecipe(slug);

      verify(mockFeedRepository.viewRecipe(slug)).called(1);
    });

    test('viewDiet - отправляет просмотр диеты', () async {
      feedCubit = FeedCubit(feedRepository: mockFeedRepository);
      const dietId = 2;

      when(mockFeedRepository.viewDiet(dietId)).thenAnswer((_) async => Future.value());

      await feedCubit!.viewDiet(dietId);

      verify(mockFeedRepository.viewDiet(dietId)).called(1);
    });

    test('viewPlan - отправляет просмотр плана', () async {
      feedCubit = FeedCubit(feedRepository: mockFeedRepository);
      const slug = 'plan-1';

      when(mockFeedRepository.viewPlan(slug)).thenAnswer((_) async => Future.value());

      await feedCubit!.viewPlan(slug);

      verify(mockFeedRepository.viewPlan(slug)).called(1);
    });
  });
}