// 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/drama.dart';
import 'package:fruitshorts/core/data/models/home_feed.dart';
import 'package:fruitshorts/core/theme/app_colors.dart';
import 'package:fruitshorts/core/theme/app_dimens.dart';
import 'package:fruitshorts/core/widgets/app_pull_to_refresh.dart';
import 'package:fruitshorts/core/widgets/paged_local_list.dart';
import 'package:fruitshorts/pages/discover/discover_view.dart';
import 'package:fruitshorts/pages/discover/widgets/drama_grid.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_category.dart';
import '../support/fake_haptics.dart';
import '../support/fake_interaction_repositories.dart';
import '../support/widget_player.dart';

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

  testWidgets('should_open_ranking_sorted_by_views', (tester) async {
    await _pumpTheater(tester);
    await tester.tap(find.byKey(const Key('theater-toolbar-ranking')));
    await tester.pumpAndSettle();

    expect(find.byKey(const Key('ranking-page')), findsOneWidget);
    _expectUnifiedHeader(tester, const Key('ranking-back'));
    expect(
      tester
          .widget<Text>(
            find.descendant(
              of: find.byKey(const Key('ranking-top-1')),
              matching: find.byType(Text),
            ),
          )
          .data,
      '1',
    );
    expect(
      tester.widget<Text>(find.byKey(const Key('ranking-title-1'))).data,
      'The Signal',
    );

    await tester.tap(find.byKey(const Key('ranking-top-1')));
    await tester.pumpAndSettle();
    expect(find.byKey(const Key('player-scaffold')), findsOneWidget);
  });

  testWidgets('should_open_new_releases_sorted_by_id', (tester) async {
    await _pumpTheater(tester);
    await tester.tap(find.byKey(const Key('theater-toolbar-new')));
    await tester.pumpAndSettle();

    expect(find.byKey(const Key('new-releases-page')), findsOneWidget);
    _expectUnifiedHeader(tester, const Key('new-releases-back'));
    final newPage = tester.widget<Scaffold>(
      find.byKey(const Key('new-releases-page')),
    );
    expect(newPage.backgroundColor, AppColors.ink);
    final badge = tester.widget<Container>(
      find.byKey(const Key('new-releases-hero-badge')),
    );
    expect((badge.decoration! as BoxDecoration).color, AppColors.blue);
    expect(find.byKey(const Key('new-releases-hero')), findsOneWidget);
    expect(find.text('Vengeance Rising'), findsWidgets);
    expect(
      find.byKey(const Key('new-release-card-the-signal-demo')),
      findsOneWidget,
    );
    expect(
      find.byKey(const Key('new-release-card-city-lights-demo')),
      findsOneWidget,
    );

    await tester.tap(find.byKey(const Key('new-releases-hero')));
    await tester.pumpAndSettle();
    expect(find.byKey(const Key('player-scaffold')), findsOneWidget);
  });

  testWidgets('should_open_reserve_empty_state', (tester) async {
    await _pumpTheater(tester);
    await tester.tap(find.byKey(const Key('theater-toolbar-reserve')));
    await tester.pumpAndSettle();

    expect(find.byKey(const Key('reserve-page')), findsOneWidget);
    _expectUnifiedHeader(tester, const Key('reserve-back'));
    expect(find.byKey(const Key('reserve-week-strip')), findsOneWidget);
    for (var index = 0; index < 7; index++) {
      expect(find.byKey(Key('reserve-day-$index')), findsOneWidget);
    }
    expect(find.byKey(const Key('reserve-empty')), findsOneWidget);
    for (var index = 1; index <= 3; index++) {
      expect(find.byKey(Key('reserve-step-$index')), findsOneWidget);
    }
    final todayIndex = DateTime.now().weekday - 1;
    final today = tester.widget<Container>(
      find.descendant(
        of: find.byKey(Key('reserve-day-$todayIndex')),
        matching: find.byType(Container),
      ),
    );
    expect((today.decoration! as BoxDecoration).color, AppColors.blue);

    await tester.tap(find.byKey(const Key('reserve-go-new')));
    await tester.pumpAndSettle();
    expect(find.byKey(const Key('new-releases-page')), findsOneWidget);
  });

  testWidgets('should_render_uniform_rows_with_cover_badges', (tester) async {
    await _pumpTheater(tester);
    await tester.tap(find.byKey(const Key('theater-toolbar-ranking')));
    await tester.pumpAndSettle();

    for (var rank = 1; rank <= 3; rank++) {
      expect(find.byKey(Key('ranking-row-${rank - 1}')), findsOneWidget);
      expect(
        tester.getSize(find.byKey(Key('ranking-row-cover-$rank'))),
        const Size(96, 128),
      );
      final badge = tester.widget<Container>(
        find.byKey(Key('ranking-top-$rank')),
      );
      final decoration = badge.decoration! as BoxDecoration;
      final expected = switch (rank) {
        1 => AppColors.brandRed,
        2 => AppColors.homeCrownGold,
        _ => AppColors.bronze,
      };
      expect(decoration.color, expected);
    }
  });

  testWidgets('should_list_every_rank_as_row', (tester) async {
    await _pumpTheater(tester, dramas: _rankDramas(5));
    await tester.tap(find.byKey(const Key('theater-toolbar-ranking')));
    await tester.pumpAndSettle();

    for (var index = 0; index < 5; index++) {
      expect(find.byKey(Key('ranking-row-$index')), findsOneWidget);
    }
    final rankNumber = tester.widget<Text>(
      find.descendant(
        of: find.byKey(const Key('ranking-top-4')),
        matching: find.byType(Text),
      ),
    );
    expect(rankNumber.data, '4');
    expect(rankNumber.style?.fontSize, 14);
    expect(rankNumber.style?.fontWeight, FontWeight.w700);
    final badge = tester.widget<Container>(
      find.byKey(const Key('ranking-top-4')),
    );
    expect(
      tester.getSize(find.byKey(const Key('ranking-top-4'))),
      const Size(24, 24),
    );
    expect(
      (badge.decoration! as BoxDecoration).borderRadius,
      const BorderRadius.only(
        topLeft: Radius.circular(AppDimens.rankingCoverRadius),
        bottomRight: Radius.circular(10),
      ),
    );
    expect(
      tester.getSize(find.byKey(const Key('ranking-row-3'))),
      const Size(362, 128),
    );
    expect(
      tester.getSize(find.byKey(const Key('ranking-row-cover-4'))),
      const Size(96, 128),
    );
  });

  testWidgets('should_render_single_row_when_only_one_drama', (tester) async {
    await _pumpTheater(tester, dramas: _rankDramas(1));
    await tester.tap(find.byKey(const Key('theater-toolbar-ranking')));
    await tester.pumpAndSettle();

    expect(find.byKey(const Key('ranking-top-1')), findsOneWidget);
    expect(find.byKey(const Key('ranking-top-2')), findsNothing);
    expect(find.byKey(const Key('ranking-top-3')), findsNothing);
  });

  testWidgets('should_open_player_from_new_releases_card', (tester) async {
    await _pumpTheater(tester);
    await tester.tap(find.byKey(const Key('theater-toolbar-new')));
    await tester.pumpAndSettle();

    final card = find.byKey(const Key('new-release-card-the-signal-demo'));
    await tester.ensureVisible(card);
    await tester.pumpAndSettle();
    await tester.tap(card);
    await tester.pumpAndSettle();

    expect(find.byKey(const Key('player-scaffold')), findsOneWidget);
  });

  testWidgets('should_go_back_to_theater_from_ranking_page', (tester) async {
    await _pumpTheater(tester);
    await tester.tap(find.byKey(const Key('theater-toolbar-ranking')));
    await tester.pumpAndSettle();

    await tester.tap(find.byKey(const Key('ranking-back')));
    await tester.pumpAndSettle();

    expect(find.byKey(const Key('ranking-page')), findsNothing);
    expect(find.byKey(const Key('discover-search')), findsOneWidget);
  });

  testWidgets('should_page_ranking_and_reset_after_refresh', (tester) async {
    final repository = _CountingCatalogRepository(dramas: _rankDramas(40));
    await _pumpTheater(tester, catalogRepository: repository);
    await tester.tap(find.byKey(const Key('theater-toolbar-ranking')));
    await tester.pumpAndSettle();

    final list = find.byKey(const Key('ranking-list'));
    expect(tester.widget<ListView>(list).physics, AppPullToRefresh.physics);
    final position = _scrollPosition(tester, const Key('ranking-list'));
    // jumpTo 不发滚动通知，滑到底后再拖一下才会触发加载。
    position.jumpTo(position.maxScrollExtent);
    await tester.pump();
    await tester.drag(list, const Offset(0, -60));
    await tester.pump();

    expect(find.byKey(const Key('ranking-row-19')), findsOneWidget);
    expect(find.byKey(const Key('ranking-row-20')), findsNothing);
    // 加载指示出现后会撑高列表，可视区外被 finder 视为 offstage，直接看状态。
    expect(_loadFooter(tester).loading, isTrue);
    await tester.pump(const Duration(milliseconds: 299));
    expect(_loadFooter(tester).loading, isTrue);
    await tester.pump(const Duration(milliseconds: 1));

    position.jumpTo(position.maxScrollExtent);
    await tester.pump();
    expect(find.byKey(const Key('ranking-row-39')), findsOneWidget);
    expect(find.byKey(const Key('ranking-row-40')), findsNothing);
    expect(find.byKey(const Key('ranking-no-more')), findsNothing);

    position.jumpTo(0);
    await tester.pump();
    final beforeRefresh = repository.fetchCalls;
    await tester.drag(list, const Offset(0, 240));
    await tester.pump();
    await tester.pumpAndSettle();

    expect(repository.fetchCalls, beforeRefresh + 1);
    expect(position.pixels, 0);
    // 刷新重置回 20 项后，滑到底再触发一次加载，应恢复 40 项。
    final refreshed = _scrollPosition(tester, const Key('ranking-list'));
    refreshed.jumpTo(refreshed.maxScrollExtent);
    await tester.pumpAndSettle();
    refreshed.jumpTo(refreshed.maxScrollExtent);
    await tester.pumpAndSettle();
    expect(find.byKey(const Key('ranking-row-39')), findsOneWidget);
    expect(find.byKey(const Key('ranking-no-more')), findsNothing);
  });

  testWidgets('should_page_new_releases_and_reset_after_refresh', (
    tester,
  ) async {
    final repository = _CountingCatalogRepository(dramas: _rankDramas(40));
    await _pumpTheater(tester, catalogRepository: repository);
    await tester.tap(find.byKey(const Key('theater-toolbar-new')));
    await tester.pumpAndSettle();

    final list = find.byKey(const Key('new-releases-list'));
    expect(
      tester.widget<CustomScrollView>(list).physics,
      AppPullToRefresh.physics,
    );

    // 网格懒加载后只保留可见行，页数直接看传给网格的剧目数。
    List<Drama> gridDramas() => tester
        .widget<SliverDramaGrid>(find.byKey(const Key('new-releases-all-grid')))
        .dramas;
    expect(gridDramas(), hasLength(20));

    // jumpTo 不发滚动通知，滑到底后再拖一下才会触发加载。
    final position = _scrollPosition(tester, const Key('new-releases-list'));
    position.jumpTo(position.maxScrollExtent);
    await tester.pump();
    await tester.drag(list, const Offset(0, -60));
    await tester.pump();
    expect(find.byKey(const Key('new-releases-load-more')), findsOneWidget);
    await tester.pumpAndSettle();
    expect(gridDramas(), hasLength(40));

    position.jumpTo(0);
    await tester.pump();
    final beforeRefresh = repository.fetchCalls;
    await tester.drag(list, const Offset(0, 240));
    await tester.pump();
    await tester.pumpAndSettle();
    expect(repository.fetchCalls, beforeRefresh + 1);
    expect(position.pixels, 0);
    expect(gridDramas(), hasLength(20));
  });

  testWidgets('should_refresh_reserve_without_load_more', (tester) async {
    final repository = _CountingCatalogRepository(dramas: _rankDramas(3));
    await _pumpTheater(tester, catalogRepository: repository);
    await tester.tap(find.byKey(const Key('theater-toolbar-reserve')));
    await tester.pumpAndSettle();

    final beforeRefresh = repository.fetchCalls;
    final list = find.byKey(const Key('reserve-list'));
    expect(tester.widget<ListView>(list).physics, AppPullToRefresh.physics);
    await tester.drag(list, const Offset(0, 240));
    await tester.pump();
    await tester.pumpAndSettle();

    expect(repository.fetchCalls, beforeRefresh + 1);
    expect(find.byKey(const Key('reserve-load-more')), findsNothing);
    expect(find.byKey(const Key('reserve-no-more')), findsNothing);
  });
}

Future<void> _pumpTheater(
  WidgetTester tester, {
  List<Drama>? dramas,
  FakeCatalogRepository? catalogRepository,
}) async {
  tester.view.physicalSize = const Size(390, 844);
  tester.view.devicePixelRatio = 1;
  addTearDown(tester.view.resetPhysicalSize);
  addTearDown(tester.view.resetDevicePixelRatio);
  final catalog = catalogRepository ?? FakeCatalogRepository(dramas: dramas);
  await tester.pumpWidget(
    LumaDramaApp(
      playerFactory: createWidgetPlayer,
      catalogRepository: catalog,
      searchRepository: catalog,
      categoryRepository: FakeCategoryRepository(catalog: catalog),
      watchHistoryRepository: InMemoryWatchHistoryRepository(),
      favoriteRepository: InMemoryFavoriteRepository(cards: catalog.dramas),
      playbackRepository: FakePlaybackRepository(),
      commentRepository: FakeCommentRepository(),
      interactionRepository: FakeInteractionRepository(),
      haptics: FakeHaptics(),
    ),
  );
  await tester.pumpAndSettle();
  Navigator.of(
    tester.element(find.byKey(const Key('home-tabs'))),
  ).push<void>(MaterialPageRoute(builder: (_) => const DiscoverPage()));
  await tester.pumpAndSettle();
}

ScrollPosition _scrollPosition(WidgetTester tester, Key listKey) {
  final scrollable = find.descendant(
    of: find.byKey(listKey),
    matching: find.byType(Scrollable),
  );
  return tester.state<ScrollableState>(scrollable.first).position;
}

PagedLoadFooter _loadFooter(WidgetTester tester) {
  return tester.widget<PagedLoadFooter>(
    find.descendant(
      of: find.byKey(const Key('ranking-page'), skipOffstage: false),
      matching: find.byType(PagedLoadFooter, skipOffstage: false),
    ),
  );
}

class _CountingCatalogRepository extends FakeCatalogRepository {
  _CountingCatalogRepository({super.dramas});

  int fetchCalls = 0;

  @override
  Future<HomeFeed> fetchHomeFeed() {
    fetchCalls++;
    return super.fetchHomeFeed();
  }
}

List<Drama> _rankDramas(int count) => [
  for (var index = 0; index < count; index++)
    Drama(
      id: 'rank-$index',
      title: 'Rank $index',
      synopsis: 'synopsis',
      posterUrl: '',
      totalEpisodes: 10,
      viewCount: (count - index) * 100,
      episodes: [
        Episode(
          id: 'rank-$index-1',
          number: 1,
          title: 'Episode 1',
          isFree: true,
        ),
      ],
    ),
];

void _expectUnifiedHeader(WidgetTester tester, Key backKey) {
  expect(tester.getSize(find.byKey(backKey)), const Size(40, 40));
  final title = tester.widget<Text>(find.byKey(const Key('subpage-title')));
  expect(title.style?.fontSize, 18);
  expect(title.style?.fontWeight, FontWeight.w400);
}