namespace Guru
{
    using UnityEngine;
    using System;
    using System.Linq;
    
    
    public partial class GuruSDK
    {
        public static bool IsIAPReady = false;
        
        /// <summary>
        /// 初始化IAP 功能
        /// </summary>
        public static void InitIAP(byte[] googleKey, byte[] appleRootCerts)
        {
            GuruIAP.Instance.OnInitResult += OnIAPInitResult;
            GuruIAP.Instance.OnRestored += OnRestored;
            GuruIAP.Instance.OnBuyStart += OnBuyStart;
            GuruIAP.Instance.OnBuyEnd += OnBuyEnd;
            
            GuruIAP.Instance.InitWithKeys(googleKey, appleRootCerts, IsDebugMode);
        }


        /// <summary>
        /// 初始化结果
        /// </summary>
        /// <param name="success"></param>
        private static void OnIAPInitResult(bool success)
        {
            LogI($"IAP init result: {success}");
            
            IsIAPReady = success;
            Callbacks.IAP._onIAPInitComplete?.Invoke(success);
        }

        private static bool CheckIAPReady()
        {
            if (!IsIAPReady)
            {
                LogE("IAP is not ready, call <GuruSDK.InitIAP> first.");
                return false;
            }

            return true;
        }
        
        #region Purchase

        public static ProductSetting GetProductSettingById(string productId)
        {
            var products = GuruSettings.Instance.Products;
            if (products != null && products.Length > 0)
            {
                return products.FirstOrDefault(p => p.ProductId == productId);   
            }
            return null;
        }
        
        private static Action<string, bool> _onPurchaseCallback;
        
        /// <summary>
        /// 购买商品, 通过商品Name
        /// </summary>
        /// <param name="productId"></param>
        /// <param name="purchaseCallback"></param>
        public static void Purchase(string productName, Action<string, bool> purchaseCallback = null)
        {
            if (CheckIAPReady())
            {
                _onPurchaseCallback = purchaseCallback;
                GuruIAP.Instance.Buy(productName);
            }
        }
        
        /// <summary>
        /// 购买商品, 通过商品ID
        /// </summary>
        /// <param name="productId"></param>
        /// <param name="purchaseCallback"></param>
        public static bool PurchaseById(string productId, Action<string, bool> purchaseCallback = null)
        {
            var productName = GetProductSettingById(productId)?.ProductName ?? "";
            
            if (CheckIAPReady() && !string.IsNullOrEmpty(productName))
            {
                Purchase(productName, purchaseCallback);
                return true;
            }
            return false;
        }
        

        /// <summary>
        /// 支付回调
        /// </summary>
        /// <param name="productId"></param>
        /// <param name="success"></param>
        private static void OnBuyEnd(string productId, bool success)
        {
            _onPurchaseCallback?.Invoke(productId, success);
        }


        private static void OnBuyStart(string productId)
        {
            Callbacks.IAP._onPurchaseStart?.Invoke(productId);
        }

        #endregion
        
        #region Restore Purchase

        private static Action<bool> _onRestored;
        /// <summary>
        /// 恢复购买
        /// </summary>
        /// <param name="restoreCallback"></param>
        public static void Restore(Action<bool> restoreCallback)
        {
            if (CheckIAPReady())
            {
                _onRestored = restoreCallback;
                GuruIAP.Instance.Restore();
            }
        }
        private static void OnRestored(bool success)
        {
            _onRestored?.Invoke(success);
        }
        
        #endregion

    }
}