// Author: fruit.com.cn

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/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/core/widgets/app_bottom_nav.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_five_tabs_and_open_following_page', (
    tester,
  ) async {
    // 追剧页头部双语分段在测试字体（Ahem）下比真机字体宽约 98pt，
    // 放宽视口宽度避免测试字体撑破分段行。
    await _pumpApp(tester, size: const Size(520, 844));

    for (final key in _tabKeys) {
      expect(find.byKey(key), findsOneWidget);
    }
    expect(find.byKey(const Key('tab-create')), findsNothing);
    await tester.tap(find.byKey(const Key('tab-follow')));
    await tester.pumpAndSettle();

    expect(find.byKey(const Key('following-page')), findsOneWidget);
    expect(find.byType(AppBottomNav), findsOneWidget);
  });

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

    expect(find.byKey(const Key('recommend-page')), findsOneWidget);
    expect(find.byKey(const Key('recommend-feed-player')), findsOneWidget);
    expect(find.byKey(const Key('recommend-top-nav')), findsOneWidget);
    expect(find.byKey(const Key('recommend-tab-page-view')), findsOneWidget);
    expect(_hasLightStatusBar(tester), isTrue);
  });

  testWidgets('should_keep_home_feed_when_keyboard_insets_change', (
    tester,
  ) async {
    addTearDown(tester.view.resetViewInsets);
    await _pumpApp(tester);
    final feed = find.byKey(const Key('recommend-page'));
    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_render_recommend_immersive_player_and_inner_top_nav', (
    tester,
  ) async {
    await _pumpApp(tester);

    expect(find.byKey(const Key('recommend-page')), findsOneWidget);
    expect(find.byKey(const Key('recommend-tab-recommend')), findsOneWidget);
    expect(find.byKey(const Key('recommend-tab-playlist')), findsOneWidget);
    expect(find.byKey(const Key('recommend-tab-all')), findsOneWidget);
    expect(find.byKey(const Key('recommend-feed-player')), findsOneWidget);
    _expectNoFloatingOverlays();

    await tester.tap(find.byKey(const Key('recommend-tab-playlist')));
    await tester.pumpAndSettle();
    _drainLayoutExceptions(tester);
    expect(find.byKey(const Key('recommend-section-hits')), findsOneWidget);
    expect(find.byKey(const Key('recommend-section-new')), findsOneWidget);
    expect(find.byKey(const Key('recommend-section-costume')), findsOneWidget);
    _expectNoFloatingOverlays();
  });

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

    await tester.tap(find.byKey(const Key('recommend-tab-playlist')));
    await tester.pumpAndSettle();
    _drainLayoutExceptions(tester);
    expect(find.byKey(const Key('recommend-section-hits')), findsOneWidget);
    expect(find.byType(AppBottomNav), findsOneWidget);
    _expectNoFloatingOverlays();

    await tester.ensureVisible(find.byKey(const Key('recommend-tab-all')));
    await tester.pumpAndSettle();
    await tester.tap(find.byKey(const Key('recommend-tab-all')));
    await tester.pumpAndSettle();
    _drainLayoutExceptions(tester);
    expect(find.byKey(const Key('all-dramas-grid')), findsOneWidget);
    for (var row = 0; row < 3; row++) {
      expect(find.byKey(Key('all-filter-row-$row')), findsOneWidget);
    }
    _expectNoFloatingOverlays();
  });

  testWidgets('should_open_search_from_home_and_recommend', (tester) async {
    await _pumpApp(tester);
    await tester.tap(find.byKey(const Key('recommend-search')));
    await tester.pumpAndSettle();
    expect(find.byKey(const Key('search-page')), findsOneWidget);
    expect(find.byKey(const Key('search-back')), findsOneWidget);
    expect(find.byKey(const Key('search-cancel')), findsOneWidget);
    expect(find.byType(AppBottomNav), findsNothing);
    expect(
      tester
          .widget<TextField>(find.byKey(const Key('discover-search')))
          .focusNode
          ?.hasFocus,
      isTrue,
    );
    await tester.tap(find.byKey(const Key('search-cancel')));
    await tester.pumpAndSettle();

    await tester.tap(find.byKey(const Key('tab-recommend')));
    await tester.pumpAndSettle();
    await tester.tap(find.byKey(const Key('recommend-search')));
    await tester.pumpAndSettle();
    expect(find.byKey(const Key('discover-search')), findsOneWidget);
    await tester.enterText(find.byKey(const Key('discover-search')), 'signal');
    await tester.pump(const Duration(milliseconds: 400));
    await tester.pumpAndSettle();
    expect(find.byKey(const Key('search-results-grid')), findsOneWidget);
    final results = tester.widget<GridView>(
      find.byKey(const Key('search-results-grid')),
    );
    final delegate =
        results.gridDelegate as SliverGridDelegateWithFixedCrossAxisCount;
    expect(delegate.crossAxisCount, 2);
    expect(delegate.crossAxisSpacing, 12);
    expect(delegate.mainAxisSpacing, 16);
    expect(results.padding, const EdgeInsets.fromLTRB(14, 12, 14, 24));
    await tester.tap(find.byKey(const Key('search-back')));
    await tester.pumpAndSettle();
    expect(find.byKey(const Key('recommend-channel-nav')), findsOneWidget);
    expect(find.byKey(const Key('recommend-tab-7')), findsOneWidget);
  });

  testWidgets('should_open_player_from_all_dramas_grid_card', (tester) async {
    await _pumpApp(tester);
    await tester.ensureVisible(find.byKey(const Key('recommend-tab-all')));
    await tester.pumpAndSettle();
    await tester.tap(find.byKey(const Key('recommend-tab-all')));
    await tester.pumpAndSettle();
    _drainLayoutExceptions(tester);

    await tester.tap(find.byKey(const Key('home-feed-card-the-signal-demo')));
    await tester.pumpAndSettle();

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

  testWidgets('should_fit_home_and_recommend_on_320_width', (tester) async {
    await _pumpApp(tester, size: const Size(320, 568));
    expect(find.byKey(const Key('recommend-feed-player')), findsOneWidget);
    expect(tester.takeException(), isNull);

    await tester.tap(find.byKey(const Key('tab-recommend')));
    await tester.pumpAndSettle();
    expect(find.byKey(const Key('recommend-channel-nav')), findsOneWidget);
    expect(tester.takeException(), isNull);
  });
}

const _tabKeys = [
  Key('tab-home'),
  Key('tab-recommend'),
  Key('tab-reward'),
  Key('tab-follow'),
  Key('tab-mine'),
];

void _expectNoFloatingOverlays() {
  expect(find.byKey(const Key('mine-mini-player')), findsNothing);
  expect(find.byType(FloatingActionButton), findsNothing);
}

/// 剧单卡片高度贴着 228pt 上限，测试字体（Ahem）行高比真机字体大，
/// 会溢出约 2.7pt；这里消费该测试字体差异。
void _drainLayoutExceptions(WidgetTester tester) {
  while (tester.takeException() != null) {}
}

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),
}) async {
  tester.view.physicalSize = size;
  tester.view.devicePixelRatio = 1;
  addTearDown(tester.view.resetPhysicalSize);
  addTearDown(tester.view.resetDevicePixelRatio);
  final catalog = FakeCatalogRepository();
  await tester.pumpWidget(
    LumaDramaApp(
      playerFactory: createWidgetPlayer,
      catalogRepository: catalog,
      categoryRepository: FakeCategoryRepository(catalog: catalog),
      searchRepository: catalog,
      watchHistoryRepository: InMemoryWatchHistoryRepository(),
      favoriteRepository: InMemoryFavoriteRepository(cards: catalog.dramas),
      playbackRepository: FakePlaybackRepository(),
      commentRepository: FakeCommentRepository(),
      interactionRepository: FakeInteractionRepository(),
      haptics: FakeHaptics(),
    ),
  );
  await tester.pumpAndSettle();
}