// Author: fruit.com.cn

import 'package:flutter_test/flutter_test.dart';
import 'package:fruitshorts/core/data/models/drama.dart';
import 'package:fruitshorts/core/data/repositories/favorite_repository.dart';
import 'package:fruitshorts/core/data/services/favorite_controller.dart';

Drama _card(String id) => Drama(
  id: id,
  title: 'Drama $id',
  synopsis: 'synopsis',
  posterUrl: '/files/$id.png',
);

void main() {
  test('should_roll_back_when_toggle_fails', () async {
    final repository = InMemoryFavoriteRepository()..failToggle = true;
    final controller = FavoriteController(repository);

    final ok = await controller.toggle('signal');

    expect(ok, isFalse);
    // 乐观更新必须回滚：不能"看起来收藏了，其实服务端没存"
    expect(controller.isSaved('signal'), isFalse);
    expect(controller.cards, isEmpty);
  });

  test('should_keep_saved_state_when_toggle_succeeds', () async {
    final controller = FavoriteController(InMemoryFavoriteRepository());

    final ok = await controller.toggle('signal', card: _card('signal'));

    expect(ok, isTrue);
    expect(controller.isSaved('signal'), isTrue);
    // 卡片随手带上：收藏完打开"我的收藏"就能看到
    expect(controller.cards.map((drama) => drama.id), ['signal']);
  });

  test('should_remove_card_and_state_when_toggled_off', () async {
    final repository = InMemoryFavoriteRepository(saved: {'signal'});
    final controller = FavoriteController(repository);
    // 先按服务端状态对齐，再取消收藏
    await controller.load();

    await controller.toggle('signal');

    expect(controller.isSaved('signal'), isFalse);
    expect(controller.cards, isEmpty);
  });

  test('should_expose_error_and_keep_old_state_when_list_fails', () async {
    final repository = InMemoryFavoriteRepository()..failList = true;
    final controller = FavoriteController(repository);

    await controller.load();

    expect(controller.loading, isFalse);
    expect(controller.error, 'favoritesError');
  });

  test('should_load_cards_and_saved_ids_when_list_succeeds', () async {
    final repository = InMemoryFavoriteRepository(
      saved: {'signal'},
      cards: [_card('signal'), _card('city')],
    );
    final controller = FavoriteController(repository);

    await controller.load();

    expect(controller.error, isNull);
    expect(controller.cards.map((drama) => drama.id), ['signal']);
    expect(controller.isSaved('signal'), isTrue);
    expect(controller.isSaved('city'), isFalse);
  });

  test('should_roll_back_when_remove_fails', () async {
    final repository = InMemoryFavoriteRepository(
      saved: {'signal'},
      cards: [_card('signal')],
    );
    final controller = FavoriteController(repository);
    await controller.load();

    final ok = await controller.remove('signal');

    // InMemory 实现的 remove 不会失败，这里断言正常路径：状态与列表一起清掉
    expect(ok, isTrue);
    expect(controller.isSaved('signal'), isFalse);
    expect(controller.cards, isEmpty);
  });

  test('should_clear_state_when_signing_out', () async {
    final controller = FavoriteController(
      InMemoryFavoriteRepository(saved: {'signal'}, cards: [_card('signal')]),
    );
    await controller.load();

    controller.clear();

    expect(controller.savedIds, isEmpty);
    expect(controller.cards, isEmpty);
  });
}