// Author: fruit.com.cn

import 'package:flutter_test/flutter_test.dart';
import 'package:fruitshorts/core/data/models/drama.dart';
import 'package:fruitshorts/core/data/models/home_feed.dart';
import 'package:fruitshorts/pages/discover/ranking_logic.dart';

void main() {
  test('should_use_backend_hot_order_when_hot_board_is_selected', () {
    final logic = RankingLogic(
      sections: [
        FeedSection(
          code: 'hot',
          title: 'Hot',
          dramas: [_drama('first'), _drama('second')],
        ),
        FeedSection(code: 'new', title: 'New', dramas: [_drama('fresh')]),
      ],
      fallback: [_drama('fallback')],
    );

    expect(logic.board, RankingBoard.hot);
    expect(logic.entries.map((entry) => entry.drama.id), ['first', 'second']);
    expect(logic.entries.map((entry) => entry.rank), [1, 2]);
    logic.dispose();
  });

  test('should_switch_to_new_releases_when_new_board_is_selected', () {
    final logic = RankingLogic(
      sections: [
        FeedSection(code: 'hot', title: 'Hot', dramas: [_drama('hot')]),
        FeedSection(code: 'new', title: 'New', dramas: [_drama('fresh')]),
      ],
      fallback: const [],
    );

    logic.select(RankingBoard.newReleases);

    expect(logic.board, RankingBoard.newReleases);
    expect(logic.entries.single.drama.id, 'fresh');
    logic.dispose();
  });

  test(
    'should_deduplicate_and_fall_back_when_requested_section_is_missing',
    () {
      final logic = RankingLogic(
        sections: [
          FeedSection(
            code: 'hot',
            title: 'Hot',
            dramas: [_drama('a'), _drama('a')],
          ),
        ],
        fallback: [_drama('b'), _drama('a')],
      );

      expect(logic.entries.map((entry) => entry.drama.id), ['a']);

      logic.select(RankingBoard.newReleases);

      expect(logic.entries.map((entry) => entry.drama.id), ['b', 'a']);
      expect(logic.entries.last.rank, 2);
      logic.dispose();
    },
  );
}

Drama _drama(String id) => Drama(
  id: id,
  title: 'Drama $id',
  synopsis: 'Synopsis $id',
  posterUrl: '/files/$id.jpg',
);