//
//  MP_IAPManager.swift
//  relax.offline.mp3.music
//
//  Created by Mr.Zhou on 2024/7/29.
//

import UIKit
import StoreKit
///内部购买项目管理器
class MP_IAPManager: NSObject {
    ///单例
    let shared = MP_IAPManager()
    ///产品ID（根据开关获取）
    private var productIdentifiers:[String] = ["6587553652","6587553795","6587554369"]
    ///产品请求(根据ID获取产品信息)
    private var productsRequest:SKProductsRequest?
    ///可用产品组
    private var availableProducts:[SKProduct] = []
    
    override init() {
        super.init()
    }
    //执行产品请求
    func requestProducts() {
        //清空可用产品
        availableProducts = []
        //将产品ID转为Set集合
        var setStrings:Set<String> = Set(productIdentifiers)
        //初始化产品请求
        productsRequest = SKProductsRequest(productIdentifiers: setStrings)
        //实现请求代理
        productsRequest?.delegate = self
        //开始执行请求
        productsRequest?.start()
    }
    
}
//MARK: - SKProductsRequestDelegate
extension MP_IAPManager: SKProductsRequestDelegate {
    //产品请求回调执行
    func productsRequest(_ request: SKProductsRequest, didReceive response: SKProductsResponse) {
        //获得可用产品
        availableProducts = response.products
        //判空
        guard availableProducts.isEmpty == false else {
            //无可用产品
            print("无可用产品")
            return
        }
    }
}