ibit-flutter/lib/data/models/copy_trading/trader.dart

import '../../../core/utils/avatar_urls.dart';

/// 交易员（跟单广场列表项）
class Trader {
  final String id;
  final String name;
  final String avatarLetter;
  final String? avatarUrl; // 真实头像 URL（来自 API）
  final int followers;
  final int? maxFollowers; // 最大跟随人数
  final double roi30d; // 近14日收益率 %
  final double profit30d; // 近30日收益 USDT
  final double profitShare; // 分润比例 %（来自 dividendPercent）
  final double winRate; // 近14日胜率 %
  final bool isNoLoss; // 是否无损跟单
  final bool isFollowing; // 是否已跟随
  /// 当前用户是否已收藏（跟单广场「我的收藏」与列表星标）
  final bool isFavorited;
  final List<double> trendData; // 走势迷你图数据
  final String? levelName; // 交易员等级名称（如 L3、L5）

  // ── 我的交易员 tab 额外字段 ──────────────────────────────
  final String? description; // 个人介绍
  final List<String> tags; // 标签列表（如超短、中长、稳健型）
  final double profitAmount; // 累计收益 USDT（对跟单员是从该交易员获得的收益）
  final int tradingDays; // 累计交易天数
  final int followCustomer; // 累计跟单人数（总人数，非当前）

  const Trader({
    required this.id,
    required this.name,
    required this.avatarLetter,
    this.avatarUrl,
    required this.followers,
    this.maxFollowers,
    required this.roi30d,
    required this.profit30d,
    required this.profitShare,
    required this.winRate,
    this.isNoLoss = false,
    this.isFollowing = false,
    this.isFavorited = false,
    this.trendData = const [],
    this.levelName,
    this.description,
    this.tags = const [],
    this.profitAmount = 0,
    this.tradingDays = 0,
    this.followCustomer = 0,
  });

  /// 是否与 Web 一致的布尔解析（支持 1/true/"true"）。
  static bool parseFavoriteFlag(dynamic value) {
    if (value == null) {
      return false;
    }
    if (value is bool) {
      return value;
    }
    if (value is num) {
      return value != 0;
    }
    final s = value.toString().trim().toLowerCase();
    if (s.isEmpty || s == '0' || s == 'false') {
      return false;
    }
    if (s == '1' || s == 'true' || s == 'yes') {
      return true;
    }
    return false;
  }

  Trader copyWith({
    bool? isFavorited,
    bool? isFollowing,
  }) {
    return Trader(
      id: id,
      name: name,
      avatarLetter: avatarLetter,
      avatarUrl: avatarUrl,
      followers: followers,
      maxFollowers: maxFollowers,
      roi30d: roi30d,
      profit30d: profit30d,
      profitShare: profitShare,
      winRate: winRate,
      isNoLoss: isNoLoss,
      isFollowing: isFollowing ?? this.isFollowing,
      isFavorited: isFavorited ?? this.isFavorited,
      trendData: trendData,
      levelName: levelName,
      description: description,
      tags: tags,
      profitAmount: profitAmount,
      tradingDays: tradingDays,
      followCustomer: followCustomer,
    );
  }

  /// 从 API 返回的 FollowTrader / TraderVo Map 构建
  factory Trader.fromApi(
    Map<String, dynamic> json, {
    bool isNoLoss = false,
    bool? isFavoritedOverride,
  }) {
    final nickname =
        (json['nickname'] ?? json['nickName'])?.toString().trim() ?? '';
    final letter = nickname.isNotEmpty ? nickname[0].toUpperCase() : '?';

    // 将 yield14List 数组转为 double 列表（用于走势图）
    List<double> trendData = [];
    final yields = json['yield14List'];
    if (yields is List) {
      trendData = yields
          .map((e) {
            if (e is Map) {
              // 安卓 Yield14 model: @SerializedName("dayYield14")
              final v =
                  e['dayYield14'] ?? e['yield'] ?? e['rate'] ?? e['value'] ?? 0;
              return (v is num)
                  ? v.toDouble()
                  : double.tryParse(v.toString()) ?? 0.0;
            }
            return (e is num)
                ? e.toDouble()
                : double.tryParse(e.toString()) ?? 0.0;
          })
          .toList()
          .reversed // 后台按 date DESC 返回（最新在前），翻转为时间正序（旧→新，左→右）
          .toList();
    }

    double _d(String key) =>
        double.tryParse((json[key] ?? '0').toString()) ?? 0.0;
    int _i(String key) => int.tryParse((json[key] ?? '0').toString()) ?? 0;

    // 解析标签列表（可能是 List<String> 或 List<Map>）
    List<String> tags = [];
    final rawTags = json['tags'];
    if (rawTags is List) {
      tags = rawTags
          .map((e) {
            if (e is String) return e;
            if (e is Map) return (e['name'] ?? '').toString();
            return '';
          })
          .where((s) => s.isNotEmpty)
          .toList();
    }

    // 分润比例：不同接口可能用不同字段名
    double resolvedProfitShare = 0.0;
    for (final key in [
      'dividendPercent',
      'profitRatio',
      'dividendRatio',
      'sharePercent',
      'profitPercent'
    ]) {
      final v = double.tryParse((json[key] ?? '').toString());
      if (v != null && v != 0.0) {
        resolvedProfitShare = v;
        break;
      }
    }

    return Trader(
      id: json['id']?.toString() ?? '',
      name: nickname,
      avatarLetter: letter,
      avatarUrl: resolvedAvatarUrlFromRecord(json),
      followers: _i('following'),
      maxFollowers: json['maxFollow'] != null ? _i('maxFollow') : null,
      roi30d: _d('dayYield14'),
      profit30d: _d('profitAmount'),
      profitShare: resolvedProfitShare,
      winRate: _d('winRate14'),
      isNoLoss: isNoLoss || json['specialTrader'] == true,
      isFollowing: parseFavoriteFlag(json['isFollow'] ?? json['follow']),
      isFavorited: isFavoritedOverride ??
          parseFavoriteFlag(
              json['isFavorite'] ?? json['isFavorited'] ?? json['favorite']),
      trendData: trendData,
      levelName: json['levelName'] as String?,
      description: json['description'] as String?,
      tags: tags,
      profitAmount: _d('profitAmount'),
      tradingDays: _i('tradingDays'),
      followCustomer: _i('defaultFollowCustomer') + _i('followCustomer'),
    );
  }
}