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

/// 推广归因服务（三段式自建方案）：
/// 1. 分享口令（剪贴板解析，准确率 100%）——主路径
/// 2. H5 中间页点击埋点 + 首启模糊匹配——辅助路径（本类 reportMatch）
/// 3. 注册页邀请码手填——兜底
class InviteService {
  InviteService._();

  /// 口令格式：#短视频邀请码XXXXXXXX#（邀请码 8 位大写字母数字，与服务端生成规则一致）
  static final RegExp _commandRe = RegExp(r'#短视频邀请码([0-9A-Z]{8})#');

  /// 从剪贴板文本解析邀请口令，未命中返回 null
  static String? parseInviteCommand(String? text) {
    if (text == null || text.isEmpty) return null;
    return _commandRe.firstMatch(text)?.group(1);
  }

  /// 生成推广文案（邀请页"复制推广文案"，口令包裹其中供被邀请人首启解析）
  static String buildShareText({required String inviteCode, required String inviteUrl}) {
    return '【短视频】精彩短视频刷不停，新人注册立送体验会员！\n'
        '① 点击链接下载：$inviteUrl\n'
        '② 或复制本段文字，打开 App 自动绑定我的邀请\n'
        '#短视频邀请码$inviteCode#';
  }

  /// 首启模糊归因上报（无口令时的辅助路径）；
  /// 命中结果由服务端按 device_id 缓存，注册时自动带出；失败不阻塞启动
  static Future<String?> reportMatch(String deviceId) async {
    try {
      final data = await ApiClient.post<Map<String, dynamic>>(
        Endpoints.inviteMatch,
        data: {'device_id': deviceId},
      );
      if (data['matched'] == true) return data['invite_code'] as String?;
    } catch (_) {
      // 归因失败不影响正常启动
    }
    return null;
  }

  /// 我的邀请（邀请码/推广链接/统计，对应《03-接口文档》9.1）
  static Future<ReferralInfo> fetchMyReferral() async {
    final data = await ApiClient.get<Map<String, dynamic>>(Endpoints.referralMe);
    return ReferralInfo.fromJson(data);
  }
}

/// 我的邀请信息
class ReferralInfo {
  ReferralInfo({
    required this.inviteCode,
    required this.inviteUrl,
    required this.eligible,
    required this.totalInvitees,
    required this.activatedCount,
    required this.rewardPointsTotal,
    required this.rebateAssetsTotal,
  });

  final String inviteCode;
  final String inviteUrl;

  /// 是否具备奖励资格（会员）
  final bool eligible;
  final int totalInvitees;
  final int activatedCount;
  final int rewardPointsTotal;
  final double rebateAssetsTotal;

  factory ReferralInfo.fromJson(Map<String, dynamic> json) => ReferralInfo(
        inviteCode: (json['invite_code'] as String?) ?? '',
        inviteUrl: (json['invite_url'] as String?) ?? '',
        eligible: (json['eligible'] as bool?) ?? false,
        totalInvitees: (json['total_invitees'] as num?)?.toInt() ?? 0,
        activatedCount: (json['activated_count'] as num?)?.toInt() ?? 0,
        rewardPointsTotal: (json['reward_points_total'] as num?)?.toInt() ?? 0,
        rebateAssetsTotal: (json['rebate_assets_total'] as num?)?.toDouble() ?? 0,
      );
}