// Author: fruit.com.cn

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:fruitshorts/app.dart';
import 'package:fruitshorts/core/data/models/content_category.dart';
import 'package:fruitshorts/core/data/models/drama.dart';
import 'package:fruitshorts/core/data/models/home_feed.dart';
import 'package:fruitshorts/core/data/repositories/category_repository.dart';
import 'package:fruitshorts/core/data/repositories/favorite_repository.dart';
import 'package:fruitshorts/core/data/repositories/playback_repository.dart';
import 'package:fruitshorts/core/data/repositories/watch_history_repository.dart';
import 'package:shared_preferences_platform_interface/in_memory_shared_preferences_async.dart';
import 'package:shared_preferences_platform_interface/shared_preferences_async_platform_interface.dart';

import '../support/fake_catalog.dart';
import '../support/fake_interaction_repositories.dart';
import '../support/fake_notice_repository.dart';
import '../support/widget_player.dart';

void main() {
  setUp(() {
    SharedPreferencesAsyncPlatform.instance =
        InMemorySharedPreferencesAsync.empty();
  });

  testWidgets('should_show_search_category_language_chips_and_drama_grid', (
    tester,
  ) async {
    await _pumpTheater(tester, categoryRepository: _GridCategoryRepository());

    expect(find.text('Continue Watching'), findsNothing);
    expect(find.byKey(const Key('discover-search')), findsOneWidget);
    expect(find.byKey(const Key('theater-category-chips')), findsOneWidget);
    expect(find.byKey(const Key('theater-language-chips')), findsNothing);
    expect(find.byKey(const Key('home-all-dramas-grid')), findsOneWidget);
    expect(tester.takeException(), isNull);
  });

  testWidgets('should_filter_grid_when_category_chip_is_tapped', (
    tester,
  ) async {
    await _pumpTheater(tester, categoryRepository: _GridCategoryRepository());

    await tester.tap(find.byKey(const Key('theater-category-7')));
    await tester.pumpAndSettle();

    expect(
      find.byKey(const Key('home-drama-card-city-lights-demo')),
      findsOneWidget,
    );
    expect(
      find.byKey(const Key('home-drama-card-the-signal-demo')),
      findsNothing,
    );
  });

  testWidgets('should_keep_discover_header_fixed_when_content_scrolls', (
    tester,
  ) async {
    await _pumpTheater(
      tester,
      categoryRepository: _GridCategoryRepository(
        discoverFeed: _tallDiscoverFeed,
      ),
    );

    final headerBefore = tester.getTopLeft(
      find.byKey(const Key('discover-search')),
    );
    final scrollable = find.descendant(
      of: find.byKey(const Key('discover-refresh')),
      matching: find.byType(Scrollable),
    );

    await tester.drag(find.byType(ListView), const Offset(0, -140));
    await tester.pumpAndSettle();

    expect(
      tester.getTopLeft(find.byKey(const Key('discover-search'))),
      headerBefore,
    );
    expect(
      tester.state<ScrollableState>(scrollable).position.pixels,
      greaterThan(0),
    );
  });

  testWidgets('should_show_empty_and_retry_states', (tester) async {
    await _pumpTheater(
      tester,
      categoryRepository: _GridCategoryRepository(
        discoverFeed: const HomeFeed(),
      ),
    );
    expect(find.byKey(const Key('discover-empty')), findsOneWidget);

    await tester.pumpWidget(const SizedBox.shrink());
    await _pumpTheater(
      tester,
      categoryRepository: _FailingCategoryRepository(),
    );

    expect(find.byKey(const Key('home-categories-error')), findsOneWidget);
    expect(find.text('Retry'), findsOneWidget);
  });

  testWidgets('should_show_search_results_when_text_changes', (tester) async {
    await _pumpTheater(tester, categoryRepository: _GridCategoryRepository());

    await tester.enterText(find.byKey(const Key('discover-search')), 'velvet');
    await tester.pump(const Duration(milliseconds: 400));
    await tester.pumpAndSettle();

    expect(
      find.byKey(const Key('home-drama-card-city-lights-demo')),
      findsOneWidget,
    );
    expect(
      find.byKey(const Key('home-drama-card-the-signal-demo')),
      findsNothing,
    );
  });

  testWidgets('should_refresh_feed_when_pulled_down', (tester) async {
    final counter = _CountingCategoryRepository(
      _GridCategoryRepository(discoverFeed: _tallDiscoverFeed),
    );
    await _pumpTheater(tester, categoryRepository: counter);

    final before = counter.categoryLoads + counter.feedLoads;
    await tester.drag(find.byType(ListView), const Offset(0, 320));
    await tester.pump();
    await tester.pump(const Duration(seconds: 1));
    await tester.pumpAndSettle();

    expect(counter.categoryLoads + counter.feedLoads, greaterThan(before));
    expect(find.byType(RefreshProgressIndicator), findsNothing);
  });
}

Future<void> _pumpTheater(
  WidgetTester tester, {
  required CategoryRepository categoryRepository,
}) async {
  tester.view.physicalSize = const Size(390, 844);
  tester.view.devicePixelRatio = 1;
  addTearDown(tester.view.resetPhysicalSize);
  addTearDown(tester.view.resetDevicePixelRatio);
  final catalog = FakeCatalogRepository();
  await tester.pumpWidget(
    LumaDramaApp(
      playerFactory: createWidgetPlayer,
      catalogRepository: catalog,
      searchRepository: catalog,
      categoryRepository: categoryRepository,
      watchHistoryRepository: InMemoryWatchHistoryRepository(),
      favoriteRepository: InMemoryFavoriteRepository(),
      playbackRepository: FakePlaybackRepository(),
      commentRepository: FakeCommentRepository(),
      interactionRepository: FakeInteractionRepository(),
      noticeRepository: FakeNoticeRepository(),
    ),
  );
  await tester.pumpAndSettle();
  await tester.tap(find.byKey(const Key('tab-theater')));
  await tester.pumpAndSettle();
}

class _GridCategoryRepository implements CategoryRepository {
  _GridCategoryRepository({HomeFeed? discoverFeed})
    : discoverFeed = discoverFeed ?? _defaultDiscoverFeed;

  final HomeFeed discoverFeed;

  @override
  Future<List<ContentCategory>> fetchCategories() async => const [
    ContentCategory(id: '7', name: 'Romance'),
  ];

  @override
  Future<HomeFeed> fetchDiscoverFeed() async => discoverFeed;
}

class _FailingCategoryRepository implements CategoryRepository {
  @override
  Future<List<ContentCategory>> fetchCategories() async => const [
    ContentCategory(id: '7', name: 'Romance'),
  ];

  @override
  Future<HomeFeed> fetchDiscoverFeed() async {
    throw StateError('discover feed unavailable');
  }
}

final _defaultDiscoverFeed = HomeFeed(
  sections: [
    FeedSection(code: 'hot', title: 'Hot', dramas: demoDramas),
    FeedSection(
      code: 'category-7',
      title: 'Romance',
      dramas: [
        Drama(
          id: 'city-lights-demo',
          title: 'City Lights & Velvet Nights',
          synopsis: 'City Lights & Velvet Nights synopsis',
          posterUrl: '/files/city-lights-demo.png',
          genre: 'Urban Romance',
          detailLoaded: true,
        ),
      ],
    ),
  ],
);

final _tallDiscoverFeed = HomeFeed(
  sections: [
    FeedSection(
      code: 'hot',
      title: 'Hot',
      dramas: [
        for (var index = 0; index < 12; index++)
          Drama(
            id: 'tall-$index',
            title: 'Tall Drama $index',
            synopsis: 'Tall Drama $index synopsis',
            posterUrl: '/files/tall-$index.png',
            genre: 'Urban Romance',
            detailLoaded: true,
          ),
      ],
    ),
  ],
);

class _CountingCategoryRepository implements CategoryRepository {
  _CountingCategoryRepository(this.delegate);

  final CategoryRepository delegate;
  int categoryLoads = 0;
  int feedLoads = 0;

  @override
  Future<List<ContentCategory>> fetchCategories() {
    categoryLoads++;
    return delegate.fetchCategories();
  }

  @override
  Future<HomeFeed> fetchDiscoverFeed() {
    feedLoads++;
    return delegate.fetchDiscoverFeed();
  }
}