/* jquery.spinner v1.0 copyright (c) 2014 by:loyaoo taobao:http://isseven.taobao.com */

(function($) {
	
	$.fn.spinner = function (opts) {
	
		var defaults = {value:1, min:1, len:3, max:1000000}
		var options = $.extend(defaults, opts)
		var keycodes = {up:38, down:40}
		return this.each(function() {
		
			var a = $('<a></a>'); f(a,0,"decrease","-");	//加
			var c = $('<a></a>'); f(c,0,"increase","+");	//减
			var b = $('<input/>');f(b,1,"amount");	//值
			
			$(this).append(a).append(b).append(c);
			a.click(function() {
					var parent = $(this).closest(".ordnum");
					var id=$(this).parents(".ord_ul").attr('data-id');
					cv(-1,id,parent);					
					settotal(b.val(),parent);
					shopcart.countamount();
				});
			b.keyup(function() {
					var parent = $(this).closest(".ordnum");
					var id=$(this).parents(".ord_ul").attr('data-id');
					cv(0,id,parent);					
					settotal(b.val(),parent);
					shopcart.countamount();
				});
			c.click(function() {
					var parent = $(this).closest(".ordnum");
					var id=$(this).parents(".ord_ul").attr('data-id');
					cv(+1,id,parent);					
					settotal(b.val(),parent);
					shopcart.countamount();
				});
			b.bind('keyup paste change',function(e){
				e.keycode==keycodes.up&&cv(+1);
				e.keycode==keycodes.down&&cv(-1);
			});
			
			function cv(n,id,parent){
				b.val(b.val().replace(/[^\d]/g,''));
				bv=parseint(b.val()||options.min)+n;
				bv>=options.min&&bv<=options.max&&b.val(bv);
				$(parent).find('.overtip').remove();
				$.post("/index.php?s=/cart/checknum",{'num':b.val(),'id':id},function(data){
					if(data.status)
					{
						layer.msg('商品数量不能大于'+data.stock);
						$(parent).find('.amount').val(data.stock);
						settotal(b.val(),parent);
						shopcart.countamount();
						//alert(newnum);
						//$('#ordernum').text(newnum);
					}
				},'json');
				if(bv<=options.min){b.val(options.min);f(a,2,"disde","decrease");}else{f(a,2,"decrease","disde");}
				if(bv>=options.max){b.val(options.max);f(c,2,"disin","increase");}else{f(c,2,"increase","disin");}
			}
			
		});

		function f(o,t,c,s){
			t==0&&o.addclass(c).attr("href","javascript:void(0)").append("<i></i>").find("i").append(s);
			t==1&&o.addclass(c).attr({"value":options.value,"autocomplete":"off","maxlength":options.len});
			t==2&&o.addclass(c).removeclass(s);
			
		}
		//计算单行的价格
		function settotal(n,par){
			var s=0;
			var price = par.prev(".ordprice").find(".price2 em");
			s = s + parseint(n)*parsefloat(price.text());
			var total =par.nextall(".ordtotal").find(".ordspan");			
			total.html(math.round(s*100)/100);			
		}
	 }
	
})(jquery);