import '../core/network/api_client.dart';
import '../core/network/endpoints.dart';
import '../models/video_item.dart';

/// 搜索服务（《03-接口文档》5.10/5.11）
class SearchService {
  SearchService._();

  /// 视频搜索：sort=hot（默认）| latest；命中敏感词服务端返回空结果
  static Future<SearchPage> search(
    String keyword, {
    String sort = 'hot',
    int page = 1,
    int pageSize = 20,
  }) async {
    final data = await ApiClient.get<Map<String, dynamic>>(
      Endpoints.search,
      queryParameters: {
        'keyword': keyword,
        'sort': sort,
        'page': page,
        'page_size': pageSize,
      },
    );
    return SearchPage.fromJson(data);
  }

  /// 热搜榜 Top10（Redis ZSet search:hot）
  static Future<List<String>> hotWords() async {
    final data = await ApiClient.get<Map<String, dynamic>>(Endpoints.hotSearch);
    return ((data['words'] as List?) ?? const []).map((e) => e.toString()).toList();
  }
}

/// 搜索结果分页（普通 page/page_size 分页）
class SearchPage {
  SearchPage({required this.total, required this.items});

  final int total;
  final List<VideoItem> items;

  factory SearchPage.fromJson(Map<String, dynamic> json) => SearchPage(
        total: (json['total'] as num?)?.toInt() ?? 0,
        items: ((json['list'] as List?) ?? const [])
            .whereType<Map<String, dynamic>>()
            .map(VideoItem.fromJson)
            .toList(),
      );
}