// Author: fruit.com.cn

import 'dart:async';

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:provider/provider.dart';
import 'package:fruitshorts/app.dart';
import 'package:fruitshorts/core/config/app_config.dart';
import 'package:fruitshorts/core/data/models/drama.dart';
import 'package:fruitshorts/core/data/models/feed_page.dart';
import 'package:fruitshorts/core/data/models/home_feed.dart';
import 'package:fruitshorts/core/data/repositories/catalog_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:fruitshorts/core/data/services/catalog_controller.dart';
import 'package:fruitshorts/core/data/services/category_controller.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/fake_notice_repository.dart';
import '../support/widget_player.dart';

void main() {
  setUp(() {
    SharedPreferencesAsyncPlatform.instance =
        InMemorySharedPreferencesAsync.empty();
    AppConfig.clearRuntimeBaseUrl();
    AppConfig.ready = Future<void>.value();
  });

  tearDown(() {
    AppConfig.clearRuntimeBaseUrl();
    AppConfig.ready = Future<void>.value();
  });

  testWidgets('should_show_feed_skeleton_without_an_in_app_splash', (
    tester,
  ) async {
    final repository = _PendingCatalogRepository();
    await _pumpApp(tester, repository);
    await tester.pump();

    expect(find.byKey(const Key('home-tabs')), findsOneWidget);
    expect(find.byKey(const Key('recommend-page')), findsOneWidget);
    expect(find.byKey(const Key('recommend-feed-skeleton')), findsOneWidget);
    expect(find.byKey(const Key('home-tabs-bar')), findsOneWidget);
    expect(find.byKey(const Key('startup-splash')), findsNothing);
    expect(find.byType(CircularProgressIndicator), findsNothing);

    repository.complete(_feed);
    await _pumpForAppData(tester);
    await _pumpUntilFound(
      tester,
      find.byKey(const Key('recommend-feed-player')),
    );

    expect(find.byKey(const Key('startup-splash')), findsNothing);
    expect(find.byKey(const Key('recommend-feed-skeleton')), findsNothing);
    expect(find.byKey(const Key('recommend-feed-player')), findsOneWidget);
  });

  testWidgets('should_show_catalog_error_inside_feed_without_full_overlay', (
    tester,
  ) async {
    await _pumpApp(tester, _FailingCatalogRepository());
    await _pumpForAppData(tester);
    // 首页 feed 失败后会先自动重试 3 次（每 1.5s），重试用尽才展示错误态。
    await _pumpUntilFound(
      tester,
      find.byKey(const Key('recommend-feed-empty')),
      step: const Duration(milliseconds: 1600),
      frames: 8,
    );

    expect(find.byKey(const Key('recommend-top-nav')), findsOneWidget);
    expect(find.byKey(const Key('recommend-feed-empty')), findsOneWidget);
    expect(find.byKey(const Key('home-tabs-bar')), findsOneWidget);
    expect(find.byType(CircularProgressIndicator), findsNothing);
  });

  testWidgets('should_show_catalog_empty_state_inside_feed', (tester) async {
    await _pumpApp(tester, _EmptyCatalogRepository());
    await _pumpForAppData(tester);
    await _pumpUntilFound(tester, find.byKey(const Key('recommend-feed-empty')));

    expect(find.byKey(const Key('recommend-top-nav')), findsOneWidget);
    expect(find.byKey(const Key('recommend-feed-empty')), findsOneWidget);
    expect(find.byKey(const Key('home-tabs-bar')), findsOneWidget);
  });
}

Future<void> _pumpApp(WidgetTester tester, CatalogRepository repository) async {
  final catalog = FakeCatalogRepository();
  await tester.pumpWidget(
    LumaDramaApp(
      playerFactory: createWidgetPlayer,
      catalogRepository: repository,
      categoryRepository: FakeCategoryRepository(catalog: repository),
      watchHistoryRepository: InMemoryWatchHistoryRepository(),
      favoriteRepository: InMemoryFavoriteRepository(cards: catalog.dramas),
      playbackRepository: FakePlaybackRepository(),
      commentRepository: FakeCommentRepository(),
      interactionRepository: FakeInteractionRepository(),
      noticeRepository: FakeNoticeRepository(),
      haptics: FakeHaptics(),
    ),
  );
  await tester.pump();
}

Future<void> _pumpUntilFound(
  WidgetTester tester,
  Finder finder, {
  Duration step = const Duration(milliseconds: 16),
  int frames = 40,
}) async {
  for (var frame = 0; frame < frames; frame++) {
    if (finder.evaluate().isNotEmpty) return;
    await tester.pump(step);
  }
  await tester.pump();
}

Future<void> _pumpForAppData(WidgetTester tester) async {
  await tester.runAsync(
    () => Future<void>.delayed(Duration.zero),
  );
  for (var frame = 0; frame < 40; frame++) {
    final root = find.byKey(const Key('home-tabs'));
    if (root.evaluate().isNotEmpty) {
      final context = tester.element(root);
      final catalog = context.read<CatalogController>();
      final categories = context.read<CategoryController>();
      if (catalog.settled && !catalog.loading && !categories.loading) {
        await tester.pump();
        return;
      }
    }
    await tester.pump(const Duration(milliseconds: 16));
  }
  await tester.pump();
}

final _feed = HomeFeed(
  sections: [
    FeedSection(code: 'hot', title: 'Hot', dramas: [demoDramas.first]),
  ],
);

class _EmptyCatalogRepository implements CatalogRepository {
  @override
  Future<HomeFeed> fetchHomeFeed() async => const HomeFeed();

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

  @override
  Future<FeedPage> fetchFeed({
    List<String> types = const [],
    String? categoryId,
    String? cursor,
    int size = 10,
  }) async => const FeedPage();

  @override
  Future<Drama> fetchDrama(String dramaId) async => _feed.dramas.first;
}

class _PendingCatalogRepository implements CatalogRepository {
  final Completer<HomeFeed> _home = Completer<HomeFeed>();
  final Completer<FeedPage> _page = Completer<FeedPage>();

  void complete(HomeFeed feed) {
    if (!_home.isCompleted) _home.complete(feed);
    if (!_page.isCompleted) _page.complete(FeedPage(dramas: feed.dramas));
  }

  @override
  Future<HomeFeed> fetchHomeFeed() => _home.future;

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

  @override
  Future<FeedPage> fetchFeed({
    List<String> types = const [],
    String? categoryId,
    String? cursor,
    int size = 10,
  }) => _page.future;

  @override
  Future<Drama> fetchDrama(String dramaId) async => _feed.dramas.first;
}

class _FailingCatalogRepository implements CatalogRepository {
  @override
  Future<HomeFeed> fetchHomeFeed() async => throw StateError('offline');

  @override
  Future<HomeFeed> fetchDiscoverFeed() async => throw StateError('offline');

  @override
  Future<FeedPage> fetchFeed({
    List<String> types = const [],
    String? categoryId,
    String? cursor,
    int size = 10,
  }) async => throw StateError('offline');

  @override
  Future<Drama> fetchDrama(String dramaId) async => throw StateError('offline');
}