/// ============================================================
/// 【class 模块模型】班级模块实体 —— 对标 Vue3 api/class/type.ts + api/userPoint/type.ts
///
/// 内容（合并自原 features/class/models/）：
///   班级动态：UserPostCommonDto / UserPostDto / UserPostResponse / ClassUser
///   积分排行：UserRank / UserRankPagedList / UserCountResult
///
/// 序列化：手动 fromJson（响应壳 {code,message,data:{...}} 先解包 data，再逐字段取），
/// 不依赖 build_runner。数字用 _toInt 兜底字符串数字。
///
/// 说明：UserPostDto 提供 copyWith（点赞/评论乐观更新需要在列表内替换单条）。
/// ============================================================
library;

// ============ 班级动态 ============

class UserPostCommonDto {
  const UserPostCommonDto({
    this.userId = 0,
    this.userName = '',
    this.content = '',
    this.createTime = '',
    this.id = 0,
    this.avatar = '',
  });

  final int userId;
  final String userName;
  final String content;
  final String createTime;
  final int id;
  final String avatar;

  factory UserPostCommonDto.fromJson(Map<String, dynamic> json) =>
      UserPostCommonDto(
        userId: _toInt(json['userId']),
        userName: json['userName'] as String? ?? '',
        content: json['content'] as String? ?? '',
        createTime: json['createTime'] as String? ?? '',
        id: _toInt(json['id']),
        // 详情接口的留言项带评论者头像
        avatar: json['avatar'] as String? ?? '',
      );
}

class UserPostDto {
  const UserPostDto({
    this.userId = 0,
    this.userName = '',
    this.avatar = '',
    this.classId = 0,
    this.content = '',
    this.likeCount = 0,
    this.replyCount = 0,
    this.subjectName = '',
    this.createTime = '',
    this.userLikeStatus = false,
    this.commons = const [],
    this.id = 0,
    this.urls = const [],
    this.type = 0, // 1 攻克任务 2 试题笔记 3 讲义笔记
    this.userLikeAvatars = const [],
  });

  final int userId;
  final String userName;
  final String avatar;
  final int classId;
  final String content;
  final int likeCount;
  final int replyCount;
  final String subjectName;
  final String createTime;
  final bool userLikeStatus;
  final List<UserPostCommonDto> commons;
  final int id;
  final List<String> urls;
  final int type;
  final List<String> userLikeAvatars;

  factory UserPostDto.fromJson(Map<String, dynamic> json) => UserPostDto(
    userId: _toInt(json['userId']),
    userName: json['userName'] as String? ?? '',
    avatar: json['avatar'] as String? ?? '',
    classId: _toInt(json['classId']),
    content: json['content'] as String? ?? '',
    likeCount: _toInt(json['likeCount']),
    replyCount: _toInt(json['replyCount']),
    subjectName: json['subjectName'] as String? ?? '',
    createTime: json['createTime'] as String? ?? '',
    userLikeStatus: json['userLikeStatus'] as bool? ?? false,
    commons: (json['commons'] as List<dynamic>? ?? const [])
        .whereType<Map<String, dynamic>>()
        .map(UserPostCommonDto.fromJson)
        .toList(),
    id: _toInt(json['id']),
    urls: (json['urls'] as List<dynamic>? ?? const [])
        .whereType<String>()
        .toList(),
    type: _toInt(json['type']),
    userLikeAvatars: (json['userLikeAvatars'] as List<dynamic>? ?? const [])
        .whereType<String>()
        .toList(),
  );

  UserPostDto copyWith({
    int? userId,
    String? userName,
    String? avatar,
    int? classId,
    String? content,
    int? likeCount,
    int? replyCount,
    String? subjectName,
    String? createTime,
    bool? userLikeStatus,
    List<UserPostCommonDto>? commons,
    int? id,
    List<String>? urls,
    int? type,
    List<String>? userLikeAvatars,
  }) {
    return UserPostDto(
      userId: userId ?? this.userId,
      userName: userName ?? this.userName,
      avatar: avatar ?? this.avatar,
      classId: classId ?? this.classId,
      content: content ?? this.content,
      likeCount: likeCount ?? this.likeCount,
      replyCount: replyCount ?? this.replyCount,
      subjectName: subjectName ?? this.subjectName,
      createTime: createTime ?? this.createTime,
      userLikeStatus: userLikeStatus ?? this.userLikeStatus,
      commons: commons ?? this.commons,
      id: id ?? this.id,
      urls: urls ?? this.urls,
      type: type ?? this.type,
      userLikeAvatars: userLikeAvatars ?? this.userLikeAvatars,
    );
  }
}

/// 班级动态分页响应
///
/// 响应壳：{code, message, data: {data: UserPostDto[], total, ...}}
/// 外层 data 是分页对象，内层 data 是动态数组。
class UserPostResponse {
  const UserPostResponse({
    this.data = const [],
    this.total = 0,
    this.pageIndex = 1,
    this.pageSize = 10,
    this.id = 0,
  });

  final List<UserPostDto> data;
  final int total;
  final int pageIndex;
  final int pageSize;
  final int id;

  factory UserPostResponse.fromJson(Map<String, dynamic> json) {
    final payload = json['data'] is Map<String, dynamic>
        ? json['data'] as Map<String, dynamic>
        : json;
    final list = payload['data'];
    return UserPostResponse(
      data: list is List
          ? list
                .whereType<Map<String, dynamic>>()
                .map(UserPostDto.fromJson)
                .toList()
          : const [],
      total: _toInt(payload['total']),
      pageIndex: _toInt(payload['pageIndex']),
      pageSize: _toInt(payload['pageSize']),
      id: _toInt(payload['id']),
    );
  }
}

class ClassUser {
  const ClassUser({
    this.userId = 0,
    this.userName = '',
    this.avatar = '',
    this.isOnline = false,
  });

  final int userId;
  final String userName;
  final String avatar;
  final bool isOnline;

  factory ClassUser.fromJson(Map<String, dynamic> json) => ClassUser(
    userId: _toInt(json['userId']),
    userName: json['userName'] as String? ?? '',
    avatar: json['avatar'] as String? ?? '',
    isOnline: json['isOnline'] as bool? ?? false,
  );
}

// ============ 积分排行 ============

class UserRank {
  const UserRank({
    this.userName = '',
    this.userId = 0,
    this.userAvatar = '',
    this.userClassName = '',
    this.rank = 0,
    this.points = 0,
  });

  final String userName;
  final int userId;
  final String userAvatar;
  final String userClassName;
  final int rank;
  final double points;

  factory UserRank.fromJson(Map<String, dynamic> json) => UserRank(
    userName: json['userName'] as String? ?? '',
    userId: _toInt(json['userId']),
    userAvatar: json['userAvatar'] as String? ?? '',
    userClassName: json['userClassName'] as String? ?? '',
    rank: _toInt(json['rank']),
    points: _toDouble(json['points']),
  );
}

class UserRankPagedList {
  const UserRankPagedList({
    this.myRank,
    this.userRanks = const [],
    this.total = 0,
    this.pageIndex = 1,
    this.pageSize = 20,
  });

  final UserRank? myRank;
  final List<UserRank> userRanks;
  final int total;
  final int pageIndex;
  final int pageSize;

  factory UserRankPagedList.fromJson(Map<String, dynamic> json) {
    final payload = json['data'] is Map<String, dynamic>
        ? json['data'] as Map<String, dynamic>
        : json;
    // 兼容 userRanks / data 两种返回字段
    final ranksList = payload['userRanks'] is List
        ? payload['userRanks'] as List<dynamic>
        : (payload['data'] is List
              ? payload['data'] as List<dynamic>
              : const []);
    return UserRankPagedList(
      myRank: payload['myRank'] is Map<String, dynamic>
          ? UserRank.fromJson(payload['myRank'] as Map<String, dynamic>)
          : null,
      userRanks: ranksList
          .whereType<Map<String, dynamic>>()
          .map(UserRank.fromJson)
          .toList(),
      total: _toInt(payload['total']),
      pageIndex: _toInt(payload['pageIndex']),
      pageSize: _toInt(payload['pageSize']),
    );
  }
}

class UserCountResult {
  const UserCountResult({
    this.classUserCount,
    this.gradeUserCount,
    this.cloudSchoolUserCount,
  });

  final int? classUserCount;
  final int? gradeUserCount;
  final int? cloudSchoolUserCount;

  factory UserCountResult.fromJson(Map<String, dynamic> json) {
    final payload = json['data'] is Map<String, dynamic>
        ? json['data'] as Map<String, dynamic>
        : json;
    return UserCountResult(
      classUserCount: _toIntOrNull(payload['classUserCount']),
      gradeUserCount: _toIntOrNull(payload['gradeUserCount']),
      cloudSchoolUserCount: _toIntOrNull(payload['cloudSchoolUserCount']),
    );
  }
}

// ============ 类型转换工具 ============

int _toInt(dynamic v) {
  if (v is num) return v.toInt();
  if (v is String) return int.tryParse(v) ?? 0;
  return 0;
}

double _toDouble(dynamic v) {
  if (v is num) return v.toDouble();
  if (v is String) return double.tryParse(v) ?? 0;
  return 0;
}

int? _toIntOrNull(dynamic v) {
  if (v == null) return null;
  if (v is num) return v.toInt();
  if (v is String) return int.tryParse(v);
  return null;
}