// Author: fruit.com.cn

import 'dart:ui';

import 'json_numbers.dart';
import 'locale_text.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,
    this.thumbnailsUrl,
    this.posterUrl,
  });

  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;
  final String? thumbnailsUrl;
  final String? posterUrl;

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

  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']),
      thumbnailsUrl: _optionalString(json['thumbnailsUrl']),
      posterUrl: _optionalString(json['posterUrl']),
    );
  }
}

class Drama {
  const Drama({
    required this.id,
    required this.title,
    required this.synopsis,
    required this.posterUrl,
    this.episodes = const [],
    this.titleLocales = const {},
    this.synopsisLocales = const {},
    this.tag = '',
    this.tagLocales = const {},
    this.tagColor = '',
    this.category = '',
    this.categoryLocales = const {},
    this.types = const [],
    this.genre = '',
    this.totalEpisodes = 0,
    this.freeEpisodes = 0,
    this.isHot = false,
    this.viewCount = 0,
    this.likeCount,
    this.favoriteCount,
    this.commentCount,
    this.language = '',
    this.dramaType = '',
    this.createdAt,
    this.detailLoaded = false,
  });

  final String id;
  final String title;
  final String synopsis;
  final Map<String, String> titleLocales;
  final Map<String, String> synopsisLocales;
  final String tag;
  final Map<String, String> tagLocales;
  final String tagColor;
  final String posterUrl;
  final List<Episode> episodes;
  final String category;
  final Map<String, String> categoryLocales;
  final List<Map<String, String>> types;
  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;

  /// 内容类型：ANIME 漫剧，LIVE 真人剧。
  final String dramaType;

  /// 上架时间；卡片接口未直接下发时可由 Snowflake id 估算。
  final DateTime? createdAt;

  /// 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'];
    final text = _DramaText.fromJson(json);
    return Drama(
      id: (json['id'] ?? '').toString(),
      title: text.title,
      synopsis: text.synopsis,
      titleLocales: text.titleLocales,
      synopsisLocales: text.synopsisLocales,
      tag: text.tag,
      tagLocales: text.tagLocales,
      tagColor: json['tagColor'] as String? ?? '',
      posterUrl: json['cover'] as String? ?? '',
      episodes: preview is Map<String, dynamic>
          ? [Episode.fromJson(preview)]
          : const [],
      category: text.category,
      categoryLocales: text.categoryLocales,
      types: text.types,
      genre: text.genre,
      totalEpisodes: (json['totalEpisodes'] 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? ?? '',
      dramaType: json['dramaType'] as String? ?? '',
      createdAt: DateTime.tryParse(json['createdAt']?.toString() ?? ''),
    );
  }

  /// 详情：带剧集列表。
  factory Drama.fromDetailJson(Map<String, dynamic> json) {
    final text = _DramaText.fromJson(json);
    return Drama(
      id: (json['id'] ?? '').toString(),
      title: text.title,
      synopsis: text.synopsis,
      titleLocales: text.titleLocales,
      synopsisLocales: text.synopsisLocales,
      tag: text.tag,
      tagLocales: text.tagLocales,
      tagColor: json['tagColor'] as String? ?? '',
      posterUrl: json['cover'] as String? ?? '',
      category: text.category,
      categoryLocales: text.categoryLocales,
      types: text.types,
      genre: text.genre,
      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? ?? '',
      dramaType: json['dramaType'] as String? ?? '',
      createdAt: DateTime.tryParse(json['createdAt']?.toString() ?? ''),
      detailLoaded: true,
      episodes: (json['episodes'] as List? ?? const [])
          .whereType<Map<String, dynamic>>()
          .map(Episode.fromJson)
          .toList(),
    );
  }

  String localizedTitle(String languageCode) {
    return localizedText(languageCode, title, titleLocales);
  }

  String localizedSynopsis(String languageCode) {
    return localizedText(languageCode, synopsis, synopsisLocales);
  }

  String localizedTag(String languageCode) {
    return localizedText(languageCode, tag, tagLocales);
  }

  /// 标签角标背景色。接口没给合法色值时用 fallback。
  Color tagRibbonColor(Color fallback) {
    final parsed = _colorFromHex(tagColor);
    return parsed ?? fallback;
  }

  /// 按当前语言取类型名称。接口没带语言表时返回空，调用方继续用中文 genre。
  List<String> localizedTypeLabels(String languageCode) {
    final labels = <String>[];
    for (final item in types) {
      final label = localizedText(languageCode, item['zh'] ?? '', item);
      if (label.isNotEmpty && !labels.contains(label)) labels.add(label);
    }
    if (labels.isNotEmpty) return labels;
    final primary = localizedText(languageCode, '', categoryLocales);
    if (primary.isNotEmpty) return [primary];
    return const [];
  }
}

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

String? _optionalString(dynamic value) {
  final text = value is String ? value.trim() : '';
  return text.isEmpty ? null : text;
}

Color? _colorFromHex(String raw) {
  final text = raw.trim();
  if (text.length != 7 || !text.startsWith('#')) return null;
  final value = int.tryParse(text.substring(1), radix: 16);
  if (value == null) return null;
  return Color(0xFF000000 | value);
}

List<Map<String, String>> _typeLocales(Object? raw) {
  if (raw is! List) return const [];
  return raw.whereType<Map>().map(localeMap).toList(growable: false);
}

/// 从语言表还原中文展示字段。列表接口不再单独下发 title / synopsis / tag。
class _DramaText {
  const _DramaText({
    required this.title,
    required this.synopsis,
    required this.titleLocales,
    required this.synopsisLocales,
    required this.tag,
    required this.tagLocales,
    required this.category,
    required this.categoryLocales,
    required this.types,
    required this.genre,
  });

  final String title;
  final String synopsis;
  final Map<String, String> titleLocales;
  final Map<String, String> synopsisLocales;
  final String tag;
  final Map<String, String> tagLocales;
  final String category;
  final Map<String, String> categoryLocales;
  final List<Map<String, String>> types;
  final String genre;

  factory _DramaText.fromJson(Map<String, dynamic> json) {
    final titleLocales = localeMap(json['titleLocales']);
    final synopsisLocales = localeMap(json['synopsisLocales']);
    final tagLocales = localeMap(json['tagLocales']);
    final categoryLocales = localeMap(json['categoryLocales']);
    final types = _typeLocales(json['types']);
    final category = _firstText(categoryLocales, json['category'], types);
    return _DramaText(
      title: _firstText(titleLocales, json['title']),
      synopsis: _firstText(synopsisLocales, json['synopsis'] ?? json['description']),
      titleLocales: titleLocales,
      synopsisLocales: synopsisLocales,
      tag: _firstText(tagLocales, json['tag']),
      tagLocales: tagLocales,
      category: category,
      categoryLocales: categoryLocales,
      types: types,
      genre: _genreText(types, json['genre']),
    );
  }
}

String _firstText(Map<String, String> locales, Object? fallback, [List<Map<String, String>>? types]) {
  final chinese = locales['zh'] ?? '';
  if (chinese.isNotEmpty) return chinese;
  if (types != null && types.isNotEmpty) {
    final label = types.first['zh'] ?? '';
    if (label.isNotEmpty) return label;
  }
  return fallback is String ? fallback : '';
}

String _genreText(List<Map<String, String>> types, Object? fallback) {
  final names = types.map((item) => item['zh'] ?? '').where((value) => value.isNotEmpty);
  final joined = names.join(' / ');
  if (joined.isNotEmpty) return joined;
  return fallback is String ? fallback : '';
}