$(function(){

	//产品展示
	$(".columnsicolist.xwzx1").each(function(){
		$(this).pagination({
			pagesize : 3,
			pagenum : 10,
			pagebar : ["prev","num", "next" ] //自定义页码条
		});
	});

	//产品展示
	$(".columnsicolist.cpzs").each(function(){
		$(this).pagination({
			pagesize : 12,
			pagenum : 10,
			pagebar : ["prev","num", "next" ] //自定义页码条
		});
	});

	//工程
	$(".columnsicolist.ywbk2").each(function(){
		$(this).pagination({
			pagesize : 3,
			pagenum : 10,
			pagebar : ["prev","num", "next" ] //自定义页码条
		});
	});
	

});


/* 
pagination 0.95 分页插件已实现图片延时加载
copyright (c) 2014 zhibinpu
date: 2014-11-13
update: 2019-10-31 可自定义页码条
jquery-1.12.4.min.js
*/ 

(function($){ 
	$.fn.pagination = function(options){

		var defaults = {
			pagesize : 4,		//每页几条
			pagenum : 6,			//页码显示个数
			pagebar : ["first", "prev", "num", "next", "end", "|", "state", "|", "pageselect", "|", "pagesizeset" ], //自定义页码条
			pagenumselect : [3, 10, 20, 50, 100]	//设置记录选择条数
		}

		var options = $.extend(defaults, options);


		var $this = this;	//整个列表对象
		var $row = $this.find("li");	//数据行对象

		var pagebar = options.pagebar;					//页码条
		var pagenumselect = options.pagenumselect;		//记录选择条数

		var pagesize = options.pagesize;				//每页条数
		var pagenow = 1;								//当前页码
		var rowcount = $row.length;						//数据总条数
		var pagecount = math.ceil(rowcount/pagesize);	//总页数

		var pagenum = options.pagenum;					//页码显示个数

		var startitem = (pagenow-1)*pagesize;			//数据显示开始处
		var enditem = startitem+pagesize;				//数据显示结束处

		var pagenostart;								//页码开始处
		var pagenoend;									//页码结束处

		var imgsrc = [];						//存储图片路径

		for(i=0; i<$row.length; i++){
			imgsrc[i] = $row.eq(i).find("img").attr("src");	//普通加载
			//imgsrc[i] = $row.eq(i).find("img").attr("data-original");	//懒加载
		}

		init();	//初始化

		//初始化
		function init(){

			$(".pagenav").remove();

			//显示分页项目
			showitem();

			//设置页码开始结尾
			setpagestartend();

			//写入导航加载页码
			$this.after("<div class='pagenav'></div>");

			//显示页码条
			showpagebar();

			//数据测试
			//console.log("startitem = "+startitem);
			//console.log("enditem = "+enditem);
			// console.log("pagesize 每页条数 = "+pagesize);
			// console.log("pagenostart 页码开始 = "+pagenostart);
			// console.log("pagenoend 页码结束 = "+pagenoend);
			// console.log("pagenow 当前页 = "+pagenow);
			// console.log("pagecount 总页数 = "+pagecount);
			// console.log("pagenum 页码个数= "+pagenum);
			// console.log("==============================");
			//console.log("imgsrc = "+imgsrc);
		}
		

		//显示当前页数据
		function showitem(){
			startitem = (pagenow-1)*pagesize;
			enditem = startitem + pagesize;
			$row.find("img").attr("src", "");
			$row.hide();
			for(i=0; i<$row.length; i++){
				if(i>=startitem && i<enditem){
					$row.eq(i).find("img").attr("src", imgsrc[i]);
					$row.eq(i).show();
				}
			}
		}

		//设置页码的开始和结尾
		function setpagestartend(){
			//分页总数小于指定页码个数时的页码
			if ( pagecount < pagenum )
			{	
				pagenostart = 1;
				pagenoend = pagecount;
				console.log("分页总数小于指定页码");
				return;
			}
			//当前页在前面的处理
			if( pagenow < pagenum / 2){
				pagenostart = 1;
				pagenoend = pagenum;
				console.log("当前页在前面");
				return;
			}
			//当前页在后面的处理
			if( pagecount - pagenow < pagenum / 2){
				pagenostart = pagecount - pagenum + 1;
				pagenoend = pagecount;
				console.log("当前页在后面");
				return;
			}
			//默认情况的处理
			pagenostart = pagenow - math.floor(pagenum / 2);
			pagenoend = pagenow + math.floor(pagenum / 2);
			pagenostart = pagenostart < 1 ? 1 : pagenostart;
			pagenoend = pagenoend > pagecount ? pagecount : pagenoend 
		}

		//显示页码
		function showpagebar(){
			//如果只有一页不显示页码
            if(pagecount == 1)
            {
                return;
            }
			var str = "";
			for(j=0; j<pagebar.length; j++){
				switch(pagebar[j]) {
					case "first":

						if (pagenow != 1)
						{
							str += "<span>首页</span>";
						}
					   	break;
					case "end":
						if (pagenow != pagecount)
						{
							str += "<span>尾页</span>";
						}
					   	break;
					case "prev":
						if (pagenow > 1)
						{
							var prev = pagenow - 1
							str += "<span>上一页</span>";
						}
					   	break;
					case "next":
						if (pagenow < pagecount)
						{
							str += "<span>下一页</span>";
						}
						break;
					case "num":
						for(i = pagenostart; i <= pagenoend; i++)
						{
							if (i == pagenow)
							{
								str += "<span class='p"+ i +" now'>"+ i +"</span>";
							}
							else
							{
								str += "<span class='p"+ i +"'>"+ i +"</span>";
							}
						}
						break;
					case "state":
						str += "当前第"+pagenow+"页/共"+pagecount+"页/共"+rowcount+"条记录";
						break;
					case "pageselect":
						str += "跳转到：<select class='pageselect'>";
						for(i=1; i<=pagecount; i++){
							if(i==pagenow){
								str += "<option selected='selected'>第"+i+"页</option>";
							}else{
								str += "<option value="+i+">第"+i+"页</option>";
							}
						}
						str += "</select>";
						break;
					case "pagesizeset":
						str += "每页<select class='pagesizeselect'>";
						for(i=0; i<pagenumselect.length; i++){
							if(pagenumselect[i]==pagesize){
								str += "<option selected='selected'>"+pagenumselect[i]+"</option>";
							}else{
								str += "<option value="+pagenumselect[i]+">"+pagenumselect[i]+"</option>";
							}
						}
						str += "</select>条记录";
						break;
					default:
						str += j;
			   	} 
			}

			$(".pagenav").append(str);
			clickpageno();
			pageselect();
			pagesizeset();
		}

		//点击页码动作
		function clickpageno(){
			$(".pagenav span").click(function(){
				//设置当前页
				if( $(this).text() == "首页" )
				{
					pagenow = 1;
				}
				else if( $(this).text() == "尾页" )
				{
					pagenow = pagecount;
				}
				else if( $(this).text() == "上一页" ){
					pagenow = pagenow - 1;
				}
				else if( $(this).text() == "下一页" ){
					pagenow = pagenow + 1;
				}
				else
				{
					pagenow = parseint($(this).text());
				}
				//重新初始化
				init();
			});
		}

		//直接跳转动作
		function pageselect(){
			$(".pageselect").change(function () {
				$(this).find("option:selected").each(function () {
					pagenow = $(this).val();
				});
				//重新初始化
				init();
			})
		}

		//选择每页几条动作
		function pagesizeset(){
			$(".pagesizeselect").change(function () {

				$(this).find("option:selected").each(function () {
					pagesize = parseint($(this).val());
				});

				//重新设置以下参数
				pagenow = 1;
				pagecount = math.ceil(rowcount/pagesize);	//总页数
				startitem = (pagenow-1)*pagesize;			//数据显示开始处
				enditem = startitem+pagesize;				//数据显示结束处

				//重新初始化
				init();
			})
		}



	};
})(jquery);