import 'package:dio/dio.dart';
import 'package:hgdj/tools_base/net/base_resp_bean.dart';
import 'package:hgdj/tools_base/net/http_manager.dart';
import 'package:uuid/uuid.dart';

/// 购买相关接口
class BuyService {
  /// /product/buy 一律带 X-Request-ID。
  /// [requestId] 由调用方持有时才是幂等键：一笔业务被拆成多次请求时(如短剧「充值成功后
  /// 自动补一次解锁」)复用同一个 id，服务端直接回首次结果，不会重复扣费。
  /// 不传就现生成一个，只作服务端链路追踪用——连点下单由 PayManager 的全屏 loading 挡着
  static Options _idempotent(String? requestId) => Options(
        headers: {'X-Request-ID': requestId ?? const Uuid().v4()},
      );

  ///购买视频 [productType] 见 PayManager 的 ProductType
  ///[contentID] 子内容ID(短剧买单集时传这一集的 id，productID 仍是剧 id)
  ///[checkoutContextId] 付费墙下发的结算上下文，服务端据此对账/归因
  ///[requestId] 幂等键，见 [_idempotent]；不传则自动生成一个仅供追踪的 id
  ///[jsonTransformation] 需要把返回体解析成模型时传，不传则 data 为原始 json
  static Future<BaseRespBean> buyVideo(
    String? productID,
    int? productType, {
    String? couponId, // 优惠卷ID
    int? goldVideoCouponNum, //金币视频抵用券金币面值,
    String? serviceId, // 裸聊服务ID
    String? source, // 来源页面标识
    String? contentID,
    String? checkoutContextId,
    String? requestId,
    Function(Map<String, dynamic> json)? jsonTransformation,
  }) async {
    final param = <String, dynamic>{
      'productID': productID,
      'productType': productType,
      'contentID': contentID,
      'checkoutContextId': checkoutContextId,
      'couponId': couponId,
      'goldVideoCouponNum': goldVideoCouponNum,
      'serviceId': serviceId,
      'source': source,
      'isH5': false,
    };
    param.removeWhere((k, v) => v == null);
    return httpManager.fetchResponseByPOST(
      '/product/buy',
      param: param,
      options: _idempotent(requestId),
      jsonTransformation: jsonTransformation,
    );
  }

  ///金币购买vip
  ///[finalPayStatus]: 预售业务，true 付尾款， false 付预定款；null 非预售业务；
  ///[couponId] 金币加赠券券id
  ///[source] 来源页面标识
  ///[experimentId]/[experimentVariant]/[sessionId] VIP 卡皮 A/B：与 /mine/topay 对齐回传
  ///[requestId] 幂等键，见 [_idempotent]
  static Future<BaseRespBean> buyVip(int? productType, String? productID,
      String? productName, int? discountedPrice,
      {String? couponId = "",
      bool? finalPayStatus,
      String? source,
      String? experimentId,
      String? experimentVariant,
      String? sessionId,
      String? mediaId,
      String? contentId,
      String? checkoutContextId,
      String? requestId}) async {
    final param = <String, dynamic>{
      'productType': productType,
      'productID': productID,
      'productName': productName,
      'discountedPrice': discountedPrice,
      'couponId': couponId,
      'finalPayStatus': finalPayStatus,
      'source': source,
      // 短剧付费墙开卡归因，字段名与 /mine/topay 那套对齐
      'mediaId': mediaId,
      'contentId': contentId,
      'checkoutContextId': checkoutContextId,
      // 空值不传，避免参数错误（DISABLED / 无实验时上游不填）
      'experimentId': (experimentId != null && experimentId.isNotEmpty)
          ? experimentId
          : null,
      'experimentVariant':
          (experimentVariant != null && experimentVariant.isNotEmpty)
              ? experimentVariant
              : null,
      'sessionId':
          (sessionId != null && sessionId.isNotEmpty) ? sessionId : null,
    };
    param.removeWhere((k, v) => v == null);
    return httpManager.fetchResponseByPOST('/product/buy',
        param: param, options: _idempotent(requestId));
  }
}