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

/// 消息通知（《03-接口文档》10.2）
class NotificationItem {
  const NotificationItem({
    required this.id,
    required this.type,
    required this.title,
    this.content = '',
    this.bizId = '',
    this.isRead = false,
    this.createdAt = '',
  });

  final int id;

  /// 1审核结果 2提现进度 3系统公告 4评论回复
  final int type;
  final String title;
  final String content;

  /// 关联业务 ID（审核结果=视频ID、提现进度=提现单号等）
  final String bizId;
  final bool isRead;
  final String createdAt;

  static const Map<int, String> typeLabels = {
    1: '审核',
    2: '提现',
    3: '公告',
    4: '回复',
  };

  String get typeLabel => typeLabels[type] ?? '通知';

  /// 审核结果：biz_id 为视频 ID
  int? get videoId => type == 1 ? int.tryParse(bizId) : null;

  NotificationItem copyWith({bool? isRead}) => NotificationItem(
        id: id,
        type: type,
        title: title,
        content: content,
        bizId: bizId,
        isRead: isRead ?? this.isRead,
        createdAt: createdAt,
      );

  factory NotificationItem.fromJson(Map<String, dynamic> json) =>
      NotificationItem(
        id: (json['id'] as num).toInt(),
        type: (json['type'] as num?)?.toInt() ?? 3,
        title: (json['title'] as String?) ?? '',
        content: (json['content'] as String?) ?? '',
        bizId: (json['biz_id'] as String?) ?? '',
        isRead: json['is_read'] as bool? ?? false,
        createdAt: (json['created_at'] as String?) ?? '',
      );
}

/// 通知分页
class NotificationsPage {
  const NotificationsPage({required this.total, required this.items});

  final int total;
  final List<NotificationItem> items;

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

/// 消息通知服务（《03-接口文档》10.2~10.4，均需登录）
class NotificationService {
  NotificationService._();

  /// 10.2 通知列表（type 筛选 + 分页）
  static Future<NotificationsPage> fetchNotifications({
    int page = 1,
    int pageSize = 20,
    int? type,
  }) async {
    final query = <String, dynamic>{'page': page, 'page_size': pageSize};
    if (type != null) query['type'] = type;
    final data = await ApiClient.get<Map<String, dynamic>>(
      Endpoints.notifications,
      queryParameters: query,
    );
    return NotificationsPage.fromJson(data);
  }

  /// 10.3 未读数
  static Future<int> fetchUnreadCount() async {
    final data = await ApiClient.get<Map<String, dynamic>>(
      Endpoints.notificationsUnread,
    );
    return (data['unread'] as num?)?.toInt() ?? 0;
  }

  /// 10.4 标记已读：ids 与 all 二选一
  static Future<void> markRead({List<int>? ids, bool all = false}) async {
    await ApiClient.post<Map<String, dynamic>>(
      Endpoints.notificationsRead,
      data: all ? {'all': true} : {'ids': ids},
    );
  }
}