#if USE_IAP
using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Purchasing;
using Touka;

public class IAPTool : NormalSingleton<IAPTool>, IStoreListener
{
	public event Action OnPurchaseBegin;
	public event Action<string, bool> OnPurchaseDone;
	public event Action<bool> OnRestoreDone;

	public bool IsRestoring => mIsRestoring;
	private bool mIsRestoring = false;

	private static IStoreController m_StoreController; // 存储商品信息;
	private static IExtensionProvider m_StoreExtensionProvider; // IAP扩展工具;
	private bool m_PurchaseInProgress = false; // 是否处于付费中;

	private Dictionary<string, ProductType> mInitProductDic;
	private SubscriptionInfo mSubsInfo = null;

	public void Initialize()
	{
		if (m_StoreController == null && m_StoreExtensionProvider == null)
			InitUnityPurchase();
	}

	private bool IsInitialized()
	{
		return m_StoreController != null && m_StoreExtensionProvider != null;
	}

	public void AddProducts(Dictionary<string, ProductType> pInitProductDic)
	{
		mInitProductDic = pInitProductDic;
	}

	// 初始化IAP;
	private void InitUnityPurchase()
	{
		if (IsInitialized()) return;

		// 标准采购模块;
		StandardPurchasingModule module = StandardPurchasingModule.Instance();

		// 配置模式;
		ConfigurationBuilder builder = ConfigurationBuilder.Instance(module);

		// 注意ProductType的类型，Consumable是可以无限购买(比如水晶)，NonConsumable是只能购买一次(比如关卡)，Subscription是每月订阅(比如VIP);
		// 这里初始化没有添加平台信息，因为平台信息有的时候还存在bug，如果必须添加，也可以添加，没有问题，确保平台信息添加正确就行了。

		foreach (string tID in IAPProducts.ProductDic.Keys)
		{
			builder.AddProduct(tID, IAPProducts.ProductDic[tID]);
		}

		if (mInitProductDic != null && mInitProductDic.Count > 0)
		{
			foreach (string tID in mInitProductDic.Keys)
			{
				builder.AddProduct(tID, mInitProductDic[tID]);
			}
		}
		
		//初始化;
		UnityPurchasing.Initialize(this, builder);
	}

#region Public Func
	// 根据ID给购买商品;
	public void BuyProductByID(string productId)
	{
		if (IsInitialized())
		{
			if (m_PurchaseInProgress == true) return;

			Product product = m_StoreController.products.WithID(productId);
			if (product != null && product.availableToPurchase)
			{
				OnPurchaseBegin?.Invoke();
				m_PurchaseInProgress = true;
				TKGDebugger.LogDebug(string.Format("Purchasing product asychronously: '{0}'", product.definition.id));
				m_StoreController.InitiatePurchase(product);
			}
			else
			{
				TKGDebugger.LogDebug("BuyProductID: FAIL. Not purchasing product, either is not found or is not available for purchase");
			}
		}
		else
		{
			TKGDebugger.LogDebug("BuyProductID FAIL. Not initialized.");
		}
	}

	// 确认购买产品成功;
	public void DoConfirmPendingPurchaseByID(string productId)
	{
		Product product = m_StoreController.products.WithID(productId);
		if (product != null && product.availableToPurchase)
		{
			if (m_PurchaseInProgress)
			{
				m_StoreController.ConfirmPendingPurchase(product);
				m_PurchaseInProgress = false;
			}
		}
	}

	// 恢复购买;
	public void RestorePurchases()
	{
		if (!IsInitialized())
		{
			OnRestoreDone?.Invoke(false);
			TKGDebugger.LogDebug("RestorePurchases FAIL. Not initialized.");
			return;
		}
		if (Application.platform == RuntimePlatform.IPhonePlayer ||
			Application.platform == RuntimePlatform.OSXPlayer)
		{
			TKGDebugger.LogDebug("RestorePurchases started ...");
			mIsRestoring = true;
			var apple = m_StoreExtensionProvider.GetExtension<IAppleExtensions>();
			apple.RestoreTransactions((result) => {
				mIsRestoring = false;
				OnRestoreDone?.Invoke(result);
				// 返回一个bool值，如果成功，则会多次调用支付回调，然后根据支付回调中的参数得到商品id，最后做处理(ProcessPurchase); 
				TKGDebugger.LogDebug("RestorePurchases continuing: " + result + ". If no further messages, no purchases available to restore.");
			});
		}
		else
		{
			TKGDebugger.LogDebug("RestorePurchases FAIL. Not supported on this platform. Current = " + Application.platform);
		}
	}
#endregion

#region IStoreListener Callback
	// IAP初始化成功回掉函数;
	public void OnInitialized(IStoreController controller, IExtensionProvider extensions)
	{
		TKGDebugger.LogDebug("IAP initialize Succeed!");

		m_StoreController = controller;
		m_StoreExtensionProvider = extensions;

		// 这里可以获取您在AppStore和Google Play 上配置的商品;
		ProductCollection products = m_StoreController.products;
		Product[] all = products.all;
		for (int i = 0; i < all.Length; i++)
		{
			TKGDebugger.LogDebug(all[i].metadata.localizedTitle + "|" + all[i].metadata.localizedPriceString + "|" + all[i].metadata.localizedDescription + "|" + all[i].metadata.isoCurrencyCode);
		}

#if UNITY_IOS
		m_StoreExtensionProvider.GetExtension<IAppleExtensions>().RegisterPurchaseDeferredListener(OnDeferred);
#endif

/*
		Dictionary<string, string> introductory_info_dict = null;

#if UNITY_IOS
		introductory_info_dict = m_StoreExtensionProvider.GetExtension<IAppleExtensions>().GetIntroductoryPriceDictionary();
#endif

		TKGDebugger.LogDebug("IAP - Available items:");
		foreach (var item in controller.products.all)
		{
			if (item.availableToPurchase)
			{
				TKGDebugger.LogDebug("IAP - " + string.Join(" - ",
					new[]
					{
						item.metadata.localizedTitle,
						item.metadata.localizedDescription,
						item.metadata.isoCurrencyCode,
						item.metadata.localizedPrice.ToString(),
						item.metadata.localizedPriceString,
						item.transactionID,
						item.receipt
					}));

                // this is the usage of SubscriptionManager class
                if (item.receipt != null)
				{
                    if (item.definition.type == ProductType.Subscription)
					{
                        if (CheckIfProductIsAvailableForSubscriptionManagerC(item.receipt))
						{
                            string intro_json = (introductory_info_dict == null || !introductory_info_dict.ContainsKey(item.definition.storeSpecificId)) ? null : introductory_info_dict[item.definition.storeSpecificId];
                            SubscriptionManager p = new SubscriptionManager(item, intro_json);
                            SubscriptionInfo info = p.getSubscriptionInfo();
							mSubsInfo = info;
                            TKGDebugger.LogDebug("product id is: " + info.getProductId());
                            TKGDebugger.LogDebug("purchase date is: " + info.getPurchaseDate());
                            TKGDebugger.LogDebug("subscription next billing date is: " + info.getExpireDate());
                            TKGDebugger.LogDebug("is subscribed? " + info.isSubscribed().ToString());
                            TKGDebugger.LogDebug("is expired? " + info.isExpired().ToString());
                            TKGDebugger.LogDebug("is cancelled? " + info.isCancelled());
                            TKGDebugger.LogDebug("product is in free trial peroid? " + info.isFreeTrial());
                            TKGDebugger.LogDebug("product is auto renewing? " + info.isAutoRenewing());
                            TKGDebugger.LogDebug("subscription remaining valid time until next billing date is: " + info.getRemainingTime());
                            TKGDebugger.LogDebug("is this product in introductory price period? " + info.isIntroductoryPricePeriod());
                            TKGDebugger.LogDebug("the product introductory localized price is: " + info.getIntroductoryPrice());
                            TKGDebugger.LogDebug("the product introductory price period is: " + info.getIntroductoryPricePeriod());
                            TKGDebugger.LogDebug("the number of product introductory price period cycles is: " + info.getIntroductoryPricePeriodCycles());
                        }
						else
						{
                            TKGDebugger.LogDebug("This product is not available for SubscriptionManager class, only products that are purchase by 1.19+ SDK can use this class.");
                        }
                    }
					else
					{
                        TKGDebugger.LogDebug("the product is not a subscription product");
                    }
                }
				else
				{
                    TKGDebugger.LogDebug("the product should have a valid receipt");
                }
			}
		}
*/
	}

	// IAP初始化失败回掉函数（没有网络的情况下并不会调起，而是一直等到有网络连接再尝试初始化）;
	public void OnInitializeFailed(InitializationFailureReason error)
	{
		switch (error)
		{
			case InitializationFailureReason.AppNotKnown:
				TKGDebugger.LogError("Is your App correctly uploaded on the relevant publisher console?");
				break;
			case InitializationFailureReason.PurchasingUnavailable:
				TKGDebugger.LogDebug("Billing disabled! Ask the user if billing is disabled in device settings.");
				break;
			case InitializationFailureReason.NoProductsAvailable:
				TKGDebugger.LogDebug("No products available for purchase! Developer configuration error; check product metadata!");
				break;
		}
	}

    private bool CheckIfProductIsAvailableForSubscriptionManagerC(string receipt)
	{
        var receipt_wrapper = (Dictionary<string, object>)MiniJson.JsonDecode(receipt);
        if (!receipt_wrapper.ContainsKey("Store") || !receipt_wrapper.ContainsKey("Payload"))
		{
            TKGDebugger.LogDebug("The product receipt does not contain enough information");
            return false;
        }
        var store = (string)receipt_wrapper ["Store"];
        var payload = (string)receipt_wrapper ["Payload"];

        if (payload != null )
		{
            switch (store)
			{
            case GooglePlay.Name:
                {
                    var payload_wrapper = (Dictionary<string, object>)MiniJson.JsonDecode(payload);
                    if (!payload_wrapper.ContainsKey("json")) {
                        TKGDebugger.LogDebug("The product receipt does not contain enough information, the 'json' field is missing");
                        return false;
                    }
                    var original_json_payload_wrapper = (Dictionary<string, object>)MiniJson.JsonDecode((string)payload_wrapper["json"]);
                    if (original_json_payload_wrapper == null || !original_json_payload_wrapper.ContainsKey("developerPayload")) {
                        TKGDebugger.LogDebug("The product receipt does not contain enough information, the 'developerPayload' field is missing");
                        return false;
                    }
                    var developerPayloadJSON = (string)original_json_payload_wrapper["developerPayload"];
                    var developerPayload_wrapper = (Dictionary<string, object>)MiniJson.JsonDecode(developerPayloadJSON);
                    if (developerPayload_wrapper == null || !developerPayload_wrapper.ContainsKey("is_free_trial") || !developerPayload_wrapper.ContainsKey("has_introductory_price_trial")) {
                        TKGDebugger.LogDebug("The product receipt does not contain enough information, the product is not purchased using 1.19 or later");
                        return false;
                    }
                    return true;
                }
            case AppleAppStore.Name:
            case AmazonApps.Name:
            case MacAppStore.Name:
                {
                    return true;
                }
            default:
                {
                    return false;
                }
            }
        }
        return false;
    }

	// 支付成功处理函数;
	public PurchaseProcessingResult ProcessPurchase(PurchaseEventArgs e)
	{
		m_PurchaseInProgress = false;

		TKGDebugger.LogDebug("Purchase OK: " + e.purchasedProduct.definition.id);

		// 消息结构 : Receipt: {"Store":"fake","TransactionID":"9c5c16a5-1ae4-468f-806d-bc709440448a","Payload":"{ \"this\" : \"is a fake receipt\" }"};
		TKGDebugger.LogDebug("Receipt: " + e.purchasedProduct.receipt);

		OnPurchaseDone?.Invoke(e.purchasedProduct.definition.id, true);

		// 我们自己后台完毕的话，通过代码设置成功(如果是不需要后台设置直接设置完毕，不要设置Pending);
		return PurchaseProcessingResult.Complete;
	}

	// 支付失败回掉函数;
	public void OnPurchaseFailed(Product item, PurchaseFailureReason r)
	{
		TKGDebugger.LogDebug("Purchase OK: " + item.definition.id);
		m_PurchaseInProgress = false;
		OnPurchaseDone?.Invoke(item.definition.id, false);
	}

	// 购买延迟提示(这个看自己项目情况是否处理);
	public void OnDeferred(Product item)
	{
		TKGDebugger.LogDebug("Purchase deferred: " + item.definition.id);
		OnPurchaseDone?.Invoke(item.definition.id, false);
	}

	// 恢复购买功能执行回掉函数;
	public void OnTransactionsRestored(bool success)
	{
		TKGDebugger.LogDebug("Transactions restored : " + success);
	}
#endregion

#region custom functions
	public string GetPriceByID(string pID)
	{
		if (m_StoreController == null && m_StoreExtensionProvider == null)
			return "";

		Product[] tProducts = m_StoreController.products.all;
		for (int i = 0; i < tProducts.Length; i++)
		{
			TKGDebugger.LogDebug(tProducts[i].metadata.localizedTitle + "|" + tProducts[i].metadata.localizedPriceString + "|" + tProducts[i].metadata.localizedDescription + "|" + tProducts[i].metadata.isoCurrencyCode);
			Product tItem = tProducts[i];
			if (tItem.definition.id.Equals(pID))
			{
#if UNITY_ANDROID
				return tItem.metadata.GetGoogleProductMetadata().localizedPriceString;
#else
				return tItem.metadata.localizedPriceString;
#endif
			}
		}

		return "";
	}

	public SubscriptionInfo GetSubscriptionInfo()
	{
		return mSubsInfo;
	}
#endregion
}
#endif