// Author: fruit.com.cn

import 'dart:async';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:fruitshorts/app.dart';
import 'package:fruitshorts/core/data/models/feed_page.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:fruitshorts/pages/home/home_feed_channel.dart';
import 'package:fruitshorts/pages/player/player_view.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_render_four_tabs_and_open_create_placeholder', (
    tester,
  ) async {
    await _pumpApp(tester);

    for (final key in _tabKeys) {
      expect(find.byKey(key), findsOneWidget);
    }

    await tester.tap(find.byKey(const Key('tab-create')));
    await tester.pumpAndSettle();

    expect(find.byKey(const Key('create-page')), findsOneWidget);
    expect(find.text('Create'), findsWidgets);
    expect(find.text('Stories become short dramas'), findsOneWidget);
    expect(find.byKey(const Key('create-ai')), findsOneWidget);
    expect(find.byKey(const Key('create-upload')), findsOneWidget);
    expect(tester.getSize(find.byKey(const Key('create-ai'))).height, 196);
    expect(find.byKey(const Key('create-motto-primary')), findsOneWidget);
    expect(find.byKey(const Key('create-motto-secondary')), findsOneWidget);
    expect(
      tester.getSize(find.byKey(const Key('create-motto-line'))),
      const Size(96, 2),
    );

    await tester.tap(find.byKey(const Key('create-ai')));
    await tester.pumpAndSettle();
    expect(find.byKey(const Key('create-placeholder-page')), findsOneWidget);
    expect(find.text('Coming soon'), findsOneWidget);
  });

  testWidgets('should_start_home_on_immersive_feed', (tester) async {
    await _pumpApp(tester);

    expect(find.byKey(const Key('home-feed-title')), findsOneWidget);
    expect(find.byKey(const Key('home-feed-full-series')), findsOneWidget);
    expect(find.byKey(const Key('home-feed-black-background')), findsOneWidget);
    expect(find.byType(PageView), findsOneWidget);
    expect(find.byKey(const Key('home-browse-page')), findsNothing);
    expect(
      tester.widget<Text>(find.byKey(const Key('rail-like-count'))).data,
      '41.9万',
    );
    expect(
      tester.widget<Text>(find.byKey(const Key('rail-save-count'))).data,
      '1006',
    );
    expect(
      tester.widget<Text>(find.byKey(const Key('rail-comments-count'))).data,
      '3.2万',
    );
    expect(find.byKey(const Key('home-feed-refresh')), findsOneWidget);
    expect(find.byKey(const Key('home-feed-danmaku')), findsNothing);
    expect(find.byKey(const Key('home-feed-fullscreen')), findsNothing);
    expect(
      tester.widget<Scaffold>(find.byType(Scaffold).first).backgroundColor,
      Colors.transparent,
    );
    expect(find.byKey(const Key('home-page-gradient')), findsNothing);
    expect(_hasLightStatusBar(tester), isTrue);
    expect(tester.widget<PlayerPage>(find.byType(PlayerPage)).homeMode, isTrue);
  });

  testWidgets('should_keep_home_feed_size_when_keyboard_insets_change', (
    tester,
  ) async {
    addTearDown(tester.view.resetViewInsets);
    await _pumpApp(tester);
    final feed = find.byKey(const Key('home-feed-black-background'));
    final before = tester.getRect(feed);

    tester.view.viewInsets = const FakeViewPadding(bottom: 300);
    await tester.pump();

    expect(
      tester
          .widget<Scaffold>(find.byType(Scaffold).first)
          .resizeToAvoidBottomInset,
      isFalse,
    );
    expect(tester.getRect(feed), before);
  });

  testWidgets('should_open_full_player_from_full_series_bar', (tester) async {
    await _pumpApp(tester);

    await tester.tap(find.byKey(const Key('home-feed-full-series')));
    await tester.pumpAndSettle();

    final player = tester.widget<PlayerPage>(find.byType(PlayerPage).last);
    expect(player.homeMode, isFalse);
  });

  testWidgets('should_switch_to_anime_channel', (tester) async {
    await _pumpApp(tester);

    await tester.tap(find.byKey(const Key('home-feed-tab-anime')));
    await tester.pumpAndSettle();

    expect(find.text('Coming soon'), findsNothing);
    expect(
      tester.widget<Text>(find.text('Anime')).style?.fontWeight,
      FontWeight.w800,
    );
    expect(find.byKey(const Key('home-feed-title')), findsOneWidget);
  });

  testWidgets('should_keep_player_when_first_anime_switch_is_loading', (
    tester,
  ) async {
    final catalog = _PendingAnimeCatalog();
    await _pumpApp(tester, catalog: catalog);
    for (var attempt = 0; attempt < 5 && catalog.animeCalls == 0; attempt++) {
      await tester.pump();
    }
    expect(catalog.animeCalls, 1);

    await tester.tap(find.byKey(const Key('home-feed-tab-anime')));
    await tester.pump();

    expect(find.byType(PlayerPage), findsOneWidget);
    expect(find.byKey(const Key('home-feed-channel-loading')), findsOneWidget);

    catalog.anime.complete(FeedPage(dramas: [demoDramas[1]]));
    await tester.pumpAndSettle();

    expect(find.byKey(const Key('home-feed-channel-loading')), findsNothing);
    expect(
      tester.widget<PlayerPage>(find.byType(PlayerPage)).feedChannel,
      HomeFeedChannel.anime,
    );
  });

  testWidgets('should_show_empty_state_when_anime_has_no_dramas', (
    tester,
  ) async {
    await _pumpApp(tester, catalog: _EmptyAnimeCatalog());

    await tester.tap(find.byKey(const Key('home-feed-tab-anime')));
    await tester.pumpAndSettle();

    expect(find.byType(PlayerPage), findsNothing);
    expect(find.text('No stories available yet.'), findsOneWidget);
  });

  testWidgets('should_refresh_feed_without_blank_loading', (tester) async {
    await _pumpApp(tester);

    await tester.tap(find.byKey(const Key('home-feed-refresh')));
    await tester.pump();

    expect(find.byType(CircularProgressIndicator), findsNothing);
    expect(find.byKey(const Key('home-feed-title')), findsOneWidget);
    await tester.pumpAndSettle();
    expect(find.byKey(const Key('home-feed-title')), findsOneWidget);
  });

  testWidgets('should_keep_feed_rail_above_bottom_panels', (tester) async {
    await _pumpApp(tester);
    final railTop = tester.getCenter(find.byKey(const Key('rail-save'))).dy;
    final railBottom = tester
        .getRect(find.byKey(const Key('rail-share')))
        .bottom;
    final seriesTop = tester
        .getRect(find.byKey(const Key('home-feed-full-series')))
        .top;
    final titleRight = tester
        .getRect(find.byKey(const Key('home-feed-title')))
        .right;
    final railLeft = tester.getRect(find.byKey(const Key('rail-save'))).left;

    expect(railTop, greaterThan(844 * 0.45));
    expect(seriesTop - railBottom, closeTo(12, 1));
    expect(titleRight, lessThanOrEqualTo(railLeft + 2));
  });

  testWidgets('should_keep_feed_header_and_progress_after_clear', (
    tester,
  ) async {
    await _pumpApp(tester);
    final gesture = await tester.startGesture(const Offset(195, 300));
    await tester.pump(const Duration(milliseconds: 700));
    await tester.pump();
    await gesture.up();
    await tester.pumpAndSettle();
    await tester.tap(find.byKey(const Key('player-more-clear')));
    await tester.pumpAndSettle();

    expect(find.byKey(const Key('home-feed-refresh')), findsOneWidget);
    expect(find.byKey(const Key('home-feed-tab-recommend')), findsOneWidget);
    expect(find.byKey(const Key('home-feed-search')), findsOneWidget);
    expect(find.byKey(const Key('home-feed-full-series')), findsOneWidget);
    expect(find.byKey(const Key('home-feed-progress')), findsOneWidget);
    expect(find.byKey(const Key('rail-save')), findsNothing);
    expect(find.byKey(const Key('home-feed-title')), findsNothing);
    final exit = tester.getRect(
      find.byKey(const Key('home-feed-exit-clear-screen')),
    );
    expect(exit.right, greaterThan(340));
    expect(exit.center.dy, greaterThan(600));

    await tester.tap(find.byKey(const Key('home-feed-exit-clear-screen')));
    await tester.pumpAndSettle();
    expect(find.byKey(const Key('rail-save')), findsOneWidget);
    expect(find.byKey(const Key('home-feed-title')), findsOneWidget);
  });

  testWidgets('should_boost_feed_on_side_long_press', (tester) async {
    await _pumpApp(tester);
    expect(find.byKey(const Key('home-feed-title')), findsOneWidget);

    final gesture = await tester.startGesture(const Offset(60, 300));
    await tester.pump(const Duration(milliseconds: 700));
    await tester.pump();

    expect(find.byKey(const Key('home-feed-speed-boost-hint')), findsOneWidget);
    expect(find.byKey(const Key('home-feed-full-series')), findsOneWidget);
    expect(find.byKey(const Key('home-feed-title')), findsNothing);
    expect(find.byKey(const Key('rail-save')), findsNothing);
    expect(find.byKey(const Key('home-feed-search')), findsNothing);

    await gesture.up();
    await tester.pumpAndSettle();
    expect(find.byKey(const Key('home-feed-speed-boost-hint')), findsNothing);
    expect(find.byKey(const Key('home-feed-title')), findsOneWidget);
    expect(find.byKey(const Key('rail-save')), findsOneWidget);
    expect(find.byKey(const Key('home-feed-search')), findsOneWidget);
  });

  testWidgets('should_hide_exit_clear_button_while_boosting', (tester) async {
    await _pumpApp(tester);
    final moreGesture = await tester.startGesture(const Offset(195, 300));
    await tester.pump(const Duration(milliseconds: 700));
    await tester.pump();
    await moreGesture.up();
    await tester.pumpAndSettle();
    await tester.tap(find.byKey(const Key('player-more-clear')));
    await tester.pumpAndSettle();
    expect(
      find.byKey(const Key('home-feed-exit-clear-screen')),
      findsOneWidget,
    );

    final boostGesture = await tester.startGesture(const Offset(60, 300));
    await tester.pump(const Duration(milliseconds: 700));
    await tester.pump();

    expect(find.byKey(const Key('home-feed-speed-boost-hint')), findsOneWidget);
    expect(find.byKey(const Key('home-feed-full-series')), findsOneWidget);
    expect(find.byKey(const Key('home-feed-progress')), findsOneWidget);
    expect(find.byKey(const Key('home-feed-exit-clear-screen')), findsNothing);
    expect(find.byKey(const Key('home-feed-search')), findsNothing);

    await boostGesture.up();
    await tester.pumpAndSettle();

    expect(find.byKey(const Key('home-feed-speed-boost-hint')), findsNothing);
    expect(
      find.byKey(const Key('home-feed-exit-clear-screen')),
      findsOneWidget,
    );
    expect(find.byKey(const Key('home-feed-search')), findsOneWidget);
  });

  testWidgets('should_resume_playback_when_boosting_while_paused', (
    tester,
  ) async {
    await _pumpApp(tester);
    await tester.tap(find.byKey(const Key('home-feed-video-toggle')));
    await tester.pump();
    expect(find.byKey(const Key('home-feed-center-play')), findsOneWidget);

    final gesture = await tester.startGesture(const Offset(60, 300));
    await tester.pump(const Duration(milliseconds: 700));
    await tester.pump();

    expect(find.byKey(const Key('home-feed-speed-boost-hint')), findsOneWidget);
    expect(find.textContaining('2.0'), findsWidgets);
    expect(find.byKey(const Key('home-feed-center-play')), findsNothing);

    await gesture.up();
    await tester.pumpAndSettle();
    expect(find.byKey(const Key('home-feed-speed-boost-hint')), findsNothing);
    expect(find.byKey(const Key('home-feed-center-play')), findsNothing);
  });

  testWidgets('should_open_more_sheet_on_center_long_press', (tester) async {
    await _pumpApp(tester);

    final gesture = await tester.startGesture(const Offset(195, 300));
    await tester.pump(const Duration(milliseconds: 700));
    await tester.pump();
    await gesture.up();
    await tester.pumpAndSettle();

    expect(find.byKey(const Key('player-more-sheet')), findsOneWidget);
    expect(find.byKey(const Key('home-feed-clear')), findsNothing);
    expect(find.byKey(const Key('home-feed-download')), findsNothing);
    expect(find.byKey(const Key('home-feed-pip')), findsNothing);
  });

  testWidgets('should_restore_light_theme_after_leaving_feed_tab', (
    tester,
  ) async {
    await _pumpApp(tester);
    expect(_hasLightStatusBar(tester), isTrue);

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

    expect(find.byKey(const Key('home-page-gradient')), findsOneWidget);
    expect(_hasLightStatusBar(tester), isFalse);
  });

  testWidgets('should_switch_feed_drama_when_swiped_up', (tester) async {
    await _pumpApp(tester);
    final before = tester
        .widget<Text>(find.byKey(const Key('home-feed-title')))
        .data;

    await tester.drag(find.byType(PageView).first, const Offset(0, -600));
    await tester.pumpAndSettle();

    final after = tester
        .widget<Text>(find.byKey(const Key('home-feed-title')))
        .data;
    expect(after, isNot(before));
  });

  testWidgets('should_keep_feed_header_fixed_when_swiping', (tester) async {
    await _pumpApp(tester);
    final before = tester.getRect(find.byKey(const Key('home-feed-search')));

    await tester.drag(find.byType(PageView).first, const Offset(0, -600));
    await tester.pumpAndSettle();

    final after = tester.getRect(find.byKey(const Key('home-feed-search')));
    expect(after.top, closeTo(before.top, 0.5));
    expect(find.byKey(const Key('home-feed-tab-recommend')), findsOneWidget);
    expect(find.byKey(const Key('home-feed-refresh')), findsOneWidget);
  });

  testWidgets('should_resume_feed_after_returning_from_full_player', (
    tester,
  ) async {
    await _pumpApp(tester);
    await tester.tap(find.byKey(const Key('home-feed-video-toggle')));
    await tester.pump();
    expect(find.byKey(const Key('home-feed-center-play')), findsOneWidget);

    await tester.tap(find.byKey(const Key('home-feed-full-series')));
    await tester.pumpAndSettle();
    expect(
      tester.widget<PlayerPage>(find.byType(PlayerPage).last).homeMode,
      isFalse,
    );

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

    expect(find.byKey(const Key('home-feed-title')), findsOneWidget);
    expect(find.byKey(const Key('home-feed-center-play')), findsNothing);
  });

  testWidgets('should_hide_feed_when_switching_to_theater', (tester) async {
    await _pumpApp(tester);
    expect(find.byKey(const Key('home-feed-title')), findsOneWidget);

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

    expect(find.byKey(const Key('home-feed-title')), findsNothing);
    expect(find.byKey(const Key('discover-search')), findsOneWidget);
  });

  testWidgets('should_open_theater_search_when_feed_search_is_tapped', (
    tester,
  ) async {
    await _pumpApp(tester);

    await tester.tap(find.byKey(const Key('home-feed-search')));
    await tester.pumpAndSettle();

    final field = tester.widget<TextField>(
      find.byKey(const Key('discover-search')),
    );
    expect(field.focusNode?.hasFocus, isTrue);
  });

  testWidgets('should_not_render_theater_language_filters', (tester) async {
    await _pumpApp(tester);
    await tester.tap(find.byKey(const Key('tab-theater')));
    await tester.pumpAndSettle();

    expect(find.byKey(const Key('theater-language-chips')), findsNothing);
    expect(find.byKey(const Key('theater-category-chips')), findsOneWidget);
    expect(find.byKey(const Key('discover-search')), findsOneWidget);
    expect(find.byKey(const Key('discover-refresh')), findsOneWidget);
    expect(
      find.byKey(const Key('home-drama-card-the-signal-demo')),
      findsOneWidget,
    );
  });

  testWidgets('should_open_fullscreen_player_when_theater_card_is_tapped', (
    tester,
  ) async {
    await _pumpApp(tester);
    await tester.tap(find.byKey(const Key('tab-theater')));
    await tester.pumpAndSettle();

    final card = find.byKey(const Key('home-drama-card-the-signal-demo'));
    await tester.scrollUntilVisible(
      card,
      220,
      scrollable: find
          .descendant(
            of: find.byKey(const Key('discover-refresh')),
            matching: find.byType(Scrollable),
          )
          .first,
    );
    await tester.ensureVisible(card);
    await tester.pumpAndSettle();
    await tester.tap(card);
    await tester.pumpAndSettle();

    final player = tester.widget<PlayerPage>(find.byType(PlayerPage).last);
    expect(player.homeMode, isFalse);
  });

  testWidgets('should_fit_home_feed_and_theater_on_320_width', (tester) async {
    await _pumpApp(tester, size: const Size(320, 568));

    expect(find.byKey(const Key('home-feed-title')), findsOneWidget);
    expect(tester.takeException(), isNull);

    await tester.tap(find.byKey(const Key('tab-theater')));
    await tester.pumpAndSettle();
    expect(find.byKey(const Key('theater-category-chips')), findsOneWidget);
    expect(find.byKey(const Key('theater-language-chips')), findsNothing);
    expect(tester.takeException(), isNull);
  });
}

const _tabKeys = [
  Key('tab-home'),
  Key('tab-theater'),
  Key('tab-create'),
  Key('tab-mine'),
];

bool _hasLightStatusBar(WidgetTester tester) => tester
    .widgetList<AnnotatedRegion<SystemUiOverlayStyle>>(
      find.byType(AnnotatedRegion<SystemUiOverlayStyle>),
    )
    .any((region) => region.value.statusBarIconBrightness == Brightness.light);

Future<void> _pumpApp(
  WidgetTester tester, {
  Size size = const Size(390, 844),
  FakeCatalogRepository? catalog,
}) async {
  tester.view.physicalSize = size;
  tester.view.devicePixelRatio = 1;
  addTearDown(tester.view.resetPhysicalSize);
  addTearDown(tester.view.resetDevicePixelRatio);
  final repository = catalog ?? FakeCatalogRepository();
  await tester.pumpWidget(
    LumaDramaApp(
      playerFactory: createWidgetPlayer,
      catalogRepository: repository,
      categoryRepository: FakeCategoryRepository(catalog: repository),
      watchHistoryRepository: InMemoryWatchHistoryRepository(),
      favoriteRepository: InMemoryFavoriteRepository(cards: repository.dramas),
      playbackRepository: FakePlaybackRepository(),
      commentRepository: FakeCommentRepository(),
      interactionRepository: FakeInteractionRepository(),
      haptics: FakeHaptics(),
    ),
  );
  await tester.pumpAndSettle();
}

class _PendingAnimeCatalog extends FakeCatalogRepository {
  final anime = Completer<FeedPage>();
  int animeCalls = 0;

  @override
  Future<FeedPage> fetchFeed({
    List<String> types = const [],
    String? categoryId,
    String? cursor,
    int size = 10,
  }) {
    if (types.contains('ANIME')) {
      animeCalls++;
      return anime.future;
    }
    return super.fetchFeed(
      types: types,
      categoryId: categoryId,
      cursor: cursor,
      size: size,
    );
  }
}

class _EmptyAnimeCatalog extends FakeCatalogRepository {
  @override
  Future<FeedPage> fetchFeed({
    List<String> types = const [],
    String? categoryId,
    String? cursor,
    int size = 10,
  }) {
    if (types.contains('ANIME')) {
      return Future.value(const FeedPage(dramas: []));
    }
    return super.fetchFeed(
      types: types,
      categoryId: categoryId,
      cursor: cursor,
      size: size,
    );
  }
}