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

/// 会员服务（《03-接口文档》第 7 章）
class MembershipService {
  MembershipService._();

  /// 7.1 套餐列表（游客可，价格来自服务端配置）
  static Future<PlansResult> fetchPlans() async {
    final data = await ApiClient.get<Map<String, dynamic>>(
      Endpoints.membershipPlans,
    );
    return PlansResult.fromJson(data);
  }

  /// 7.2 我的会员状态（需登录）
  static Future<MyMemberState> fetchMe() async {
    final data = await ApiClient.get<Map<String, dynamic>>(
      Endpoints.membershipMe,
    );
    return MyMemberState.fromJson(data);
  }

  /// 7.3 积分开通会员（需登录）
  /// 错误码：2004 终身卡重复开通，2001 积分不足
  static Future<RedeemResult> redeem(String planCode) async {
    final data = await ApiClient.post<Map<String, dynamic>>(
      Endpoints.membershipRedeem,
      data: {'plan_code': planCode},
    );
    return RedeemResult.fromJson(data);
  }
}

/// 开通结果
class RedeemResult {
  const RedeemResult({
    required this.orderNo,
    required this.planName,
    required this.pointsCost,
    required this.remainingPoints,
    required this.expireAt,
  });

  final String orderNo;
  final String planName;
  final int pointsCost;
  final int remainingPoints;
  final String expireAt;

  factory RedeemResult.fromJson(Map<String, dynamic> json) => RedeemResult(
        orderNo: json['order_no'] as String,
        planName: json['plan_name'] as String,
        pointsCost: (json['points_cost'] as num).toInt(),
        remainingPoints: (json['remaining_points'] as num).toInt(),
        expireAt: json['expire_at'] as String,
      );
}