// Author: fruit.com.cn

import 'json_numbers.dart';

/// 短剧与剧集，字段与后端 `/app/**` 的下发结构对应。
///
/// 封面与播放地址都是后端返回的相对路径（`/files/...`），
/// 渲染前用 `AppConfig.mediaUrl` 补上服务地址。
class Episode {
  const Episode({
    required this.id,
    required this.number,
    required this.title,
    required this.isFree,
    this.videoUrl = '',
    this.durationSec = 0,
    this.locked = false,
    this.likeCount,
    this.commentCount,
  });

  final String id;
  final int number;
  final String title;
  final bool isFree;

  /// 播放地址：详情接口不下发，由 `/app/episodes/{id}/play` 返回后写入。
  final String videoUrl;
  final int durationSec;

  /// 后端判定需要解锁；解锁能力（金币/VIP）在 M3 接入。
  final bool locked;
  final int? likeCount;
  final int? commentCount;

  Episode withVideoUrl(String url, {int? likeCount, int? commentCount}) =>
      Episode(
        id: id,
        number: number,
        title: title,
        isFree: isFree,
        videoUrl: url,
        durationSec: durationSec,
        locked: locked,
        likeCount: likeCount ?? this.likeCount,
        commentCount: commentCount ?? this.commentCount,
      );

  factory Episode.fromJson(Map<String, dynamic> json) {
    return Episode(
      id: (json['id'] ?? '').toString(),
      number: (json['number'] as num?)?.toInt() ?? 0,
      title: json['title'] as String? ?? '',
      isFree: json['isFree'] == true,
      durationSec: (json['durationSec'] as num?)?.toInt() ?? 0,
      locked: json['locked'] == true,
      videoUrl: json['playUrl'] as String? ?? '',
      likeCount: _optionalInt(json['likeCount']),
      commentCount: _optionalInt(json['commentCount']),
    );
  }
}

class Drama {
  const Drama({
    required this.id,
    required this.title,
    required this.synopsis,
    required this.posterUrl,
    this.episodes = const [],
    this.category = '',
    this.genre = '',
    this.totalEpisodes = 0,
    this.freeEpisodes = 0,
    this.isHot = false,
    this.viewCount = 0,
    this.likeCount,
    this.favoriteCount,
    this.commentCount,
    this.language = '',
    this.detailLoaded = false,
  });

  final String id;
  final String title;
  final String synopsis;
  final String posterUrl;
  final List<Episode> episodes;
  final String category;
  final String genre;
  final int totalEpisodes;
  final int freeEpisodes;
  final bool isHot;
  final int viewCount;

  /// 详情下发的互动数量；卡片或旧接口没有这些字段时为 null（客户端不显示数字）。
  final int? likeCount;
  final int? favoriteCount;
  final int? commentCount;

  /// 卡片语种（如 zh-CN / id），用于剧场语言筛选。
  final String language;

  /// 详情接口是否已经取过完整剧集列表。
  /// 列表卡片只带一集可播预览，需要完整剧集时再进详情。
  final bool detailLoaded;

  /// 卡片只带一集预览，集数以后端给的总集数为准。
  int get episodeCount => totalEpisodes > 0 ? totalEpisodes : episodes.length;

  /// 列表卡片：带一集可播预览（首页直接起播），完整剧集进详情再取。
  factory Drama.fromCardJson(Map<String, dynamic> json) {
    final preview = json['preview'];
    return Drama(
      id: (json['id'] ?? '').toString(),
      title: json['title'] as String? ?? '',
      synopsis: json['synopsis'] as String? ?? '',
      posterUrl: json['cover'] as String? ?? '',
      episodes: preview is Map<String, dynamic>
          ? [Episode.fromJson(preview)]
          : const [],
      category: json['category'] as String? ?? '',
      genre: json['genre'] as String? ?? '',
      totalEpisodes: (json['totalEpisodes'] as num?)?.toInt() ?? 0,
      isHot: json['isHot'] == true,
      // viewCount 后端是 Long，按字符串下发（见 json_numbers.dart）
      viewCount: jsonToInt(json['viewCount']),
      likeCount: _optionalInt(json['likeCount']),
      favoriteCount: _optionalInt(json['favoriteCount']),
      commentCount: _optionalInt(json['commentCount']),
      language: json['language'] as String? ?? '',
    );
  }

  /// 详情：带剧集列表。
  factory Drama.fromDetailJson(Map<String, dynamic> json) {
    return Drama(
      id: (json['id'] ?? '').toString(),
      title: json['title'] as String? ?? '',
      synopsis: json['synopsis'] as String? ?? '',
      posterUrl: json['cover'] as String? ?? '',
      category: json['category'] as String? ?? '',
      genre: json['genre'] as String? ?? '',
      totalEpisodes: (json['totalEpisodes'] as num?)?.toInt() ?? 0,
      freeEpisodes: (json['freeEpisodes'] as num?)?.toInt() ?? 0,
      isHot: json['isHot'] == true,
      viewCount: jsonToInt(json['viewCount']),
      likeCount: _optionalInt(json['likeCount']),
      favoriteCount: _optionalInt(json['favoriteCount']),
      commentCount: _optionalInt(json['commentCount']),
      language: json['language'] as String? ?? '',
      detailLoaded: true,
      episodes: (json['episodes'] as List? ?? const [])
          .whereType<Map<String, dynamic>>()
          .map(Episode.fromJson)
          .toList(),
    );
  }
}

int? _optionalInt(dynamic value) => value == null ? null : jsonToInt(value);