// notices_api.dart — 系统通知代理端点封装(JWT 经 ApiClient 自动注入)。
import '../l10n/app_text.dart';
import 'api_client.dart';

class NoticeItem {
  const NoticeItem({
    required this.id,
    required this.type,
    required this.titleZh,
    required this.titleEn,
    required this.bodyZh,
    required this.bodyEn,
    required this.link,
    required this.publishedAt,
    required this.unread,
  });

  final int id;
  final String type, titleZh, titleEn, bodyZh, bodyEn, link;
  final DateTime? publishedAt;
  final bool unread;

  /// 单显文案:zh 取中文,非 zh(en/ja/ko/ru/es)一律取英文兜底。
  String title(AppLang lang) => lang == AppLang.zh ? titleZh : titleEn;

  factory NoticeItem.fromJson(Map<String, dynamic> j) {
    DateTime? published;
    final raw = j['published_at'] as String?;
    if (raw != null && raw.isNotEmpty) {
      try {
        published = DateTime.parse(raw);
      } catch (_) {
        published = null;
      }
    }
    return NoticeItem(
      id: (j['id'] as num?)?.toInt() ?? 0,
      type: j['type'] as String? ?? '',
      titleZh: j['title_zh'] as String? ?? '',
      titleEn: j['title_en'] as String? ?? '',
      bodyZh: j['body_zh'] as String? ?? '',
      bodyEn: j['body_en'] as String? ?? '',
      link: j['link'] as String? ?? '',
      publishedAt: published,
      unread: j['unread'] as bool? ?? false,
    );
  }

  NoticeItem copyWith({bool? unread}) => NoticeItem(
        id: id,
        type: type,
        titleZh: titleZh,
        titleEn: titleEn,
        bodyZh: bodyZh,
        bodyEn: bodyEn,
        link: link,
        publishedAt: publishedAt,
        unread: unread ?? this.unread,
      );
}

class NoticesData {
  const NoticesData({required this.items, required this.unreadCount});

  final List<NoticeItem> items;
  final int unreadCount;

  factory NoticesData.fromJson(Map<String, dynamic> j) {
    final rawItems = j['notices'] as List<dynamic>? ?? const [];
    return NoticesData(
      items: rawItems
          .whereType<Map<String, dynamic>>()
          .map(NoticeItem.fromJson)
          .toList(),
      unreadCount: (j['unread_count'] as num?)?.toInt() ?? 0,
    );
  }

  NoticesData copyWith({List<NoticeItem>? items, int? unreadCount}) =>
      NoticesData(items: items ?? this.items, unreadCount: unreadCount ?? this.unreadCount);
}

class NoticesApi {
  NoticesApi(this._c);
  final ApiClient _c;

  Future<NoticesData> fetch() async => NoticesData.fromJson(await _c.getJson('/v1/notices'));

  Future<void> markRead() async {
    await _c.postJson('/v1/notices/read');
  }
}