(function(w,d,u,p,_self){
	class checkOut{
		constructor(...params){
			try{
				this.Shopify = Shopify;
			}catch(e){
				this.Shopify = {};
			}
			_self = this;
			if(!this.checkPageIsCheckout()) return false;
			params = ["shop=" + this.shop];
			return this.sendApiRequest(this.getDataToParams("version",params),"get","",function(res){
				return _self.checkOutVersionResponse(res);
			});
		}
		checkPageIsCheckout(){
			this.shop = this.Shopify.shop ? this.Shopify.shop : '';
			this.Checkout = this.Shopify.Checkout ? this.Shopify.Checkout : {};
			this.OrderStatus = this.Checkout.OrderStatus ? this.Checkout.OrderStatus : {};
			if(!this.shop) return false;
			if(typeof this.OrderStatus.addContentBox !== 'function') return false;
			this.isOrderStatusPage = this.Checkout.isOrderStatusPage ? this.Checkout.isOrderStatusPage : false;
			if(this.isOrderStatusPage !== true) return false;
			return true;
		}
		checkOutVersionResponse(res){
			let code = res.code ? parseInt(res.code) : 0,
				data = res.data ? res.data : {};
			if(code !== 200) return false;
			if(data.js || data.css){
				var h = d.getElementsByTagName('head')[0];
				if(data.css.length > 0) data.css.forEach(function(v,k){
					if(!v) return false;
					if(!/^http/.test(v)){
						var l = d.createElement("style");
						l.innerHTML = v;
						return h.append(l);
					}
					var l = d.createElement("link");
					l.type = "text/css";
					l.rel = "stylesheet";
					l.href = v;
					return h.appendChild(l);
				})
				if(data.js.length > 0) data.js.forEach(function(v,k){
					if(!v) return false;
					if(!/^http/.test(v)) return eval(v);
					var s = d.createElement("script");
					s.type = "text/javascript";
					s.language = "javascript";
					s.src = v;
					return h.appendChild(s);
				})
			}
		}
		getDataToParams(type,arr = []){
			if(!type) return "";
			return u + p +'/'+type+ "?" + arr.join("&");
		}
		sendApiRequest(u,m,d,f){
			let x = "";
			m = m != "get" && m != "post" ? "get" : m;
			d = d || null;
			f = f || "";
			if(!d || Object.keys(d).length === 0) d = null, m = "get";
			if(!u) return false;
			try{
				x = new XMLHttpRequest();
			}catch(e){
				try{
					x = new ActiveXObject("Msxml2.XMLHTTP");
				}catch(e){
					try{
						x = new ActiveXObject("Microsoft.XMLHTTP");
					}catch(e){
						console.log("Failed to get ajax object, please contact customer service for a solution!");
					}
				}
			}
			if(!x) return false;
			x.onreadystatechange = function(){
				try{
					if(x.readyState == 4 && (x.status == 200 || x.status == 304)){
						var d = x.responseText;
						d = d ? JSON.parse(d) : {};
						if(f !== "") f(d);
                    }
                } catch (e) {
                    console.log("Ajax response is error, please contact customer service for a solution!");
                }
            }
            x.open(m, u);
            x.send(d);
        }
    }

    new checkOut();
}(window, document, "//tms.trackingmore.net", "/api/v2/checkout", {}))