/**
 * @author 愚人码头
 */
(function($){
	$.fn.slide=function(options){
	    var opts = $.extend({}, $.fn.slide.deflunt, options);
	    var that = $(this);
		var index=1;
		var targetli = $("." + opts.clanav + " li", $(this));//目标对象
		var clicknext = $("." + opts.clanav + " .next", $(this));//点击下一个按钮
		var clickprev = $("." + opts.clanav + " .prev", $(this));//点击上一个按钮
		var contentbox = $("." + opts.clacon , $(this));//滚动的对象
		var contentboxnum=contentbox.children().size();//滚动对象的子元素个数
		var slideh=contentbox.children().first().height();//滚动对象的子元素个数高度，相当于滚动的高度
		var slidew=contentbox.children().first().width();//滚动对象的子元素宽度，相当于滚动的宽度
		var autoy;
		var slidewh;
		var action = opts.effect;
		if(opts.effect=="scrooly"||opts.effect=="scrooltxt"){
			slidewh=slideh;
		}else if(opts.effect=="scroolx"||opts.effect=="scroolloop"){
			contentbox.css("width",contentboxnum*slidew);
			slidewh=slidew;
		}else if(opts.effect=="fade"){
			contentbox.children().first().css("z-index","1");
		}
		
		return this.each(function() {
			var $this=$(this);
			//滚动函数
			var doplay=function(){
			    $.fn.slide.effect[opts.effect](contentbox, targetli, index, slidewh, opts.speed);
				index++;
				if (index*opts.steps >= contentboxnum) {
					index = 0;
				}
			};
			clicknext.click(function(event){
				$.fn.slide.effectloop.scroolleft(contentbox, targetli, index, slidewh, opts,function(){
					for(var i=0;i<opts.steps;i++){
	                    contentbox.find("li:first",$this).appendto(contentbox);
	                }
	                contentbox.css({"left":"0"});
				});
				event.preventdefault();
			});
			clickprev.click(function(event){
				for(var i=0;i<opts.steps;i++){
	                contentbox.find("li:last").prependto(contentbox);
	            }
	          	contentbox.css({"left":-index*opts.steps*slidew});
				$.fn.slide.effectloop.scroolright(contentbox, targetli, index, slidewh, opts);
				event.preventdefault();
			}); 
		    //自动播放
			var fadeaotu = function () {
			    slide(index);
			    index++;
			    index = index >= contentboxnum ? 0 : index;
			};
			if (opts.autoplay) {
			    fadeaotu(0);
			    autoy = setinterval(fadeaotu, opts.timer);
			    that.hover(function () {
			        if (opts.autoplay) {
			            autoy = clearinterval(autoy);
			        }
			    }, function () {
			        if (opts.autoplay) {
			            autoy = setinterval(fadeaotu, opts.timer);
			        }
			    });

			};

			function slide(i) {
			    contentbox.children().eq(i).stop().animate({ opacity: 1, "z-index": "1" }, 500).siblings().stop().animate({ opacity: 0, "z-index": "0" }, 500);
			    targetli.eq(i).addclass("on").siblings().removeclass("on");
			};
			
		    //目标事件
			var d = new date();
			var s = d.gettime();
			targetli.hover(function(){
			    if (opts.autoplay) {
			        autoy = clearinterval(autoy);
			    };
			    var d = new date();
			    var ed = d.gettime() - s;
			    if (ed >= 350) {
			        index = targetli.index(this);
			        window.settimeout(function () { $.fn.slide.effect[opts.effect](contentbox, targetli, index, slidewh, opts); }, 200);
			    } else {
			        s = d.gettime();
			        return false;
			    };
				
			},function(){
				/*if(opts.autoplay){
				    autoy = setinterval(doplay, opts.timer);
				} */
			    s = d.gettime()
			}); 
    	});
	};
	$.fn.slide.deflunt={
		effect : "scrooly",
		autoplay:true,
		speed : "normal",
		timer : 1000,
		defindex : 0,
		clanav:"jq-slide-nav",
		clacon:"jq-slide-content",
		steps:1
	};
	$.fn.slide.effectloop={
		scroolleft:function(contentobj,navobj,i,slidew,opts,callback){
			contentobj.animate({"left":-i*opts.steps*slidew},opts.speed,callback);
			if (navobj) {
				navobj.eq(i).addclass("on").siblings().removeclass("on");
			}
		},
		
		scroolright:function(contentobj,navobj,i,slidew,opts,callback){
			contentobj.stop().animate({"left":0},opts.speed,callback);
			
		}
	}
	$.fn.slide.effect={
	    fade: function (contentobj, navobj, i, slidew, speed) {
	        //console.log(i);
			contentobj.children().eq(i).stop().animate({opacity:1},speed).css({"z-index": "1"}).siblings().animate({opacity: 0},speed).css({"z-index":"0"});
			navobj.eq(i).addclass("on").siblings().removeclass("on");
		},
		scrooltxt:function(contentobj,undefined,i,slideh,opts){
			//alert(i*opts.steps*slideh);
			contentobj.animate({"margin-top":-opts.steps*slideh},speed,function(){
                for( var j=0;j<opts.steps;j++){
                	contentobj.find("li:first").appendto(contentobj);
                }
                contentobj.css({"margin-top":"0"});
            });
		},
		scroolx:function(contentobj,navobj,i,slidew,opts,callback){
			contentobj.stop().animate({"left":-i*opts.steps*slidew},speed,callback);
			if (navobj) {
				navobj.eq(i).addclass("on").siblings().removeclass("on");
			}
		},
		scrooly:function(contentobj,navobj,i,slideh,opts){
			contentobj.stop().animate({"top":-i*opts.steps*slideh},speed);
			if (navobj) {
				navobj.eq(i).addclass("on").siblings().removeclass("on");
			}
		}
	};
})(jquery);