/**
   * jpage for  jquery分页插件
   * 功能：
   * 1.指定页数内静态分页
   * 2.超过指定页数后ajax请求下一组静态分页
   * 3.支持cookie记录当前页码和分组大小
   * 4.支持浏览器前进后退
   * 5.搜索引擎抓取
   * @author 陈健
   * @version 3.0
   * @date 2015-06-25
   * @param config 插件配置
   */
(function(){
	var i18n = {
		'zh-cn' : {
			norecord: '没有检索到任何记录！',
			error: '请求失败或超时，请稍后再试！'
		},
		'zh-tw' : {
			norecord: '沒有檢索到任何記錄！',
			error: '請求失敗或超時，請稍後再試！'
		}
	}

	function getlang(langtype) {
		return i18n[langtype];
	}

	jquery.fn.jpage = function(config){
		var canpushstate = boolean(window.history.pushstate);//是否支持pushstate
		var containerid = this.attr("id");

		init("#"+containerid,config);//初始化
		
		/**
		   * 初始化，主程序
		   * @param t 容器的id，带#号
		   * @param config 插件配置
		   */
		function init(t,config){
			//公有变量
			if(!t)
				return;
			var initstore = config.datastore;			//初始数据
			var xmlstore = $(createxmldocument(initstore));
			var datastore = new array();
			xmlstore.find('record').each(
				function(){
					datastore.push($(this).text());
				}
			);

			var lang = typeof zh_choose != 'undefined' && zh_choose == 't' ? getlang('zh-tw') : getlang('zh-cn');

			var opencookies = config.opencookies != null ? config.opencookies : true;
			var configpage = config.perpage > 0 ? config.perpage : 10;
			var perpage = !opencookies || $.cookie(t+"_perpage") == null ? configpage : parseint($.cookie(t+"_perpage"));	//每页显示记录数
			var totalrecord = config.totalrecord;																			//总记录数
			if(totalrecord==undefined)
				totalrecord = 0;
			else{
				totalrecord = config.totalrecord > 0 ? config.totalrecord : 0;	
				if(totalrecord == 0){
					$(t).css("text-align","center");
					$(t).css("line-height","50px");
					$(t).html(lang.norecord);
					return;
				}
			}	
			var proxyurl = config.proxyurl != null ? config.proxyurl : 'dataproxy.jsp';									//数据代理地址
			var groupsize = config.groupsize != null ? config.groupsize : 1;											//组大小
			var barposition = config.barposition == null || config.barposition == ""? 'bottom' : config.barposition;	//工具条位置
			var ajaxparam = config.ajaxparam;	
			//ajax的请求参数
			var searchstart = config.ajaxparam.searchstart;
			var showmode = config.showmode == null || config.showmode == '' ? 'full' : config.showmode;					//显示模式
			var allowchangeperpage = config.allowchangeperpage == null || config.allowchangeperpage ? true : false;		//是否允许切换每页显示数
			var themename = config.themename == null || config.themename == '' ? 'default' : config.themename;			//主题名称
			var databefore = config.databefore == null ? '' : config.databefore;
			var dataafter = config.dataafter == null ? '' : config.dataafter;
			var callback = config.callback == null ? function(){} : config.callback;
		
			//私有变量
			var totalpage = math.ceil(totalrecord/perpage);																//总页数
			var currentpage = !opencookies || $.cookie(t+"_currentpage") == null ? 1 : parseint($.cookie(t+"_currentpage"));//当前页码
			var uid = geturlparam('uid');
			if (uid == containerid) {
				currentpage = parseint(geturlparam('pagenum'));
			}
			if(currentpage>totalpage){
				currentpage=totalpage;
			}
			if(searchstart*1==1){
				currentpage = 1;
			}
			var startrecord;																							//每页起始记录，相对于当前组
			var endrecord;	 																							//每页结束记录，相对于当前组
			var gpstartpage;																							//组开始页
			var gpendpage;																								//组结束页
			var gpstartrecord = 1;																						//组开始记录
			var gpendrecord = perpage * groupsize;
		
			//数据容器
			var container = '<div class="'+themename+'_pgcontainer"></div>';
		
			//添加工具条
			var toolbar = '<table width="100%" border="0" cellpadding="0" cellspacing="0" class="'+themename+'_pgtoolbar"><tr><td>';
			toolbar += '<table border="0" cellspadding="0" cellspacing="0" class="'+themename+'_pgpanel"><tr>';
			if(showmode == 'full' && allowchangeperpage){
				toolbar += '<td valign="middle"><select class="'+themename+'_pgperpage" title="每页显示条数">';
				if(config.perpage>0)
					toolbar += '<option value="'+config.perpage+'">'+config.perpage+'</option>';
				toolbar += '<option value="5">5</option>';
				toolbar += '<option value="10">10</option>';
				toolbar += '<option value="15">15</option>';
				toolbar += '<option value="20">20</option>';
				toolbar += '<option value="25">25</option>';
				toolbar += '<option value="40">40</option>';
				toolbar += '</select>&nbsp;</td>';
				toolbar += '<td valign="middle"><div class="'+themename+'_separator"></div></td>';
			}
			toolbar += '<td valign="middle"><a class="'+themename+'_pgbtn '+themename+'_pgfirst" title="首页"></a></td>';
			toolbar += '<td valign="middle"><a class="'+themename+'_pgbtn '+themename+'_pgprev" title="上页"></a></td>';
			if(showmode == 'full'){
				toolbar += '<td valign="middle" width="10" align="left"><div class="'+themename+'_separator"></div></td>';
				toolbar += '<td valign="middle">第 <input class="'+themename+'_pgcurrentpage" type="text" value="' + currentpage + '" title="页码" /> 页 / 共 <span class="'+themename+'_pgtotalpage">' + totalpage + '</span> 页</td>';
				toolbar += '<td valign="middle" width="10" align="right"><div class="'+themename+'_separator"></div></td>';
			}else if(showmode == 'normal'){
				toolbar += '<td valign="middle"><div class="'+themename+'_separator"></div></td>';
				toolbar += '<td valign="middle"> <input class="'+themename+'_pgcurrentpage" type="text" value="' + currentpage + '" title="页码" /> /  <span class="'+themename+'_pgtotalpage">' + totalpage + '</span> 页</td>';
				toolbar += '<td valign="middle"><div class="'+themename+'_separator"></div></td>';
			}
			toolbar += '<td valign="middle"><a class="'+themename+'_pgbtn '+themename+'_pgnext" title="下页"></a></td>';
			toolbar += '<td valign="middle"><a class="'+themename+'_pgbtn '+themename+'_pglast" title="尾页"></a></td>';
			if(groupsize){
				toolbar += '<td valign="middle"><div class="'+themename+'_separator"></div></td>';
				toolbar += '<td valign="middle"><div class="'+themename+'_pgbtn '+themename+'_pgrefresh" title="刷新"></div></td>';
			}
			if(showmode == 'full'){
				toolbar += '<td valign="middle" width="10" align="left"><div class="'+themename+'_separator"></div></td>';
				toolbar += '<td valign="middle" class="'+themename+'_pgsearchinfo">检索到&nbsp;<span class="'+themename+'_pgtotalrecord">' + totalrecord + '</span>&nbsp;条记录，显示第&nbsp;<span class="'+themename+'_pgstartrecord">' + startrecord + '</span>&nbsp;条&nbsp;-&nbsp;第&nbsp;<span class="'+themename+'_pgendrecord">' + endrecord + '</span>&nbsp;条记录</td>';
			}
			toolbar += '</td></tr></table>';
			toolbar += '</td></tr></table>';
		
			if(configpage<totalrecord) {
				switch(barposition){
					case 'top':
						$(t).html(toolbar+container);
						break;
					case 'bottom':
						$(t).html(container+toolbar);
						break;
					default:
						$(t).html(toolbar+container+toolbar);
				}
			} else {
				$(t).html(container);
			}
		
			var btnrefresh = $(t+" ."+themename+"_pgrefresh");															//刷新按钮
			var btnnext =$(t+" ."+themename+"_pgnext");																	//下一页按钮
			var btnprev = $(t+" ."+themename+"_pgprev");																//上一页按钮
			var btnfirst = $(t+" ."+themename+"_pgfirst");																//首页按钮
			var btnlast = $(t+" ."+themename+"_pglast");																//末页按钮
			var btngo = $(t+" ."+themename+"_pgnext,"+t+" ."+themename+"_pglast");
			var btnback = $(t+" ."+themename+"_pgprev,"+t+" ."+themename+"_pgfirst");
			var btn = $(t+" ."+themename+"_pgfirst,"+t+" ."+themename+"_pgprev,"+t+" ."+themename+"_pgnext,"+t+" ."+themename+"_pglast");
			var mask;
			
			var valcurrentpage = $(t+" ."+themename+"_pgcurrentpage");
			var valstartrecord = $(t+" ."+themename+"_pgstartrecord");
			var valendrecord =$(t+" ."+themename+"_pgendrecord");
			var valcontainer = $(t+" ."+themename+"_pgcontainer");
			var valperpage = $(t+" ."+themename+"_pgperpage");
			var valtotalpage = $(t+" ."+themename+"_pgtotalpage");
			
			$(t+" ."+themename+"_pgperpage").attr("value",perpage);
			getgroupstartend();
			getstartend();
			if(datastore==null || datastore.length == 0 || perpage!=configpage || currentpage>groupsize)
				getremotedata();
			else{
				getstartend();
				loaddata();
				refresh();
			}

			//浏览器前进后退
			function browserchangepage() {
				uid = geturlparam('uid');

				var targetpage;
				if (uid == containerid) {
					targetpage = parseint(geturlparam('pagenum'));
				} else {
					targetpage = 1;
				}

				if(!datastore || (targetpage > currentpage && currentpage == gpendpage) || (targetpage < currentpage && currentpage == gpstartpage)){
					currentpage = targetpage;

					getgroupstartend();
					getstartend();
					getremotedata();
				}else{
					currentpage = targetpage;

					getstartend();
					loaddata();
					refresh();
				}
			}

			if (canpushstate) {//html5支持pushsate
				window.addeventlistener('popstate', browserchangepage);
			} else {
				window.onhashchange = browserchangepage;
			}
		
			//刷新按钮监听
			btnrefresh.bind("mousedown",presshandler).bind("mouseup",unpresshandler).bind("mouseout",unpresshandler);

			//按钮链接
			modifybtnlink({
				uid: containerid,
				pagenum: currentpage
			});
		
			//刷新工具栏
			refresh();

			//按钮监听
			btn.click(
				function() {
					if ($(this).is('[disabled]')) {
						return false;
					}
					
					btn.removeattr('href');
				}
			);
			
			btnnext.click(
				function(){
					if(currentpage < totalpage){
						if(!datastore || currentpage == gpendpage){
							currentpage += 1;
							getgroupstartend();
							getstartend();
							getremotedata();
						}else{
							currentpage += 1;
							getstartend();
							loaddata();
							refresh();
						}
					}
					var hashparams = {uid: containerid};
					hashparams.pagenum = currentpage;
					pushstate(hashparams);
					modifybtnlink(hashparams);
					return false;
				}
			);	
			btnprev.click(
				function(){
					if(currentpage > 1){
						if(!datastore || currentpage == gpstartpage){
							currentpage -= 1;
							getgroupstartend();
							getstartend();
							getremotedata();
						}else{
							currentpage -= 1;
							getstartend();
							loaddata();
							refresh();
						}
					}
					var hashparams = {uid: containerid};
					hashparams.pagenum = currentpage;
					pushstate(hashparams);
					modifybtnlink(hashparams);
					return false;
				}
			);
			btnfirst.click(
				function(){
					if(!datastore || currentpage > 1){
						if(gpstartpage > 1){
							currentpage = 1;
							getgroupstartend();
							getstartend();
							getremotedata();
						}else{
							currentpage = 1;
							getstartend();
							loaddata();
							refresh();
						}
					}
					var hashparams = {uid: containerid};
					hashparams.pagenum = currentpage;
					pushstate(hashparams);
					modifybtnlink(hashparams);
					return false;
				}
			);
			btnlast.click(
				function(){
					if(!datastore || currentpage < totalpage){
						if(gpendpage > 0 && gpendpage < totalpage){
							currentpage = totalpage;
							getgroupstartend();
							getstartend();
							getremotedata();
						}else{
							currentpage = totalpage;
							getstartend();
							loaddata();
							refresh();
						}
					}
					var hashparams = {uid: containerid};
					hashparams.pagenum = currentpage;
					pushstate(hashparams);
					modifybtnlink(hashparams);
					return false;
				}
			);
			btnrefresh.click(
				function(){
					getgroupstartend();
					getstartend();
					getremotedata();
				}
			);
			
			//页码输入框监听
			valcurrentpage.keydown(
				function(event){
					var targetpage = parseint($(this).val());
					if(event.keycode==13 && targetpage>=1 && targetpage<=totalpage){
						if(!datastore || gpstartpage > targetpage || (gpendpage > 0 && gpendpage < targetpage)){
							currentpage = targetpage;
							getgroupstartend();
							getstartend();
							getremotedata();
						}else{
							currentpage = targetpage;
							getstartend();
							loaddata();
							refresh();
						}
					}
					var hashparams = {uid: containerid};
					hashparams.pagenum = currentpage;
					pushstate(hashparams);
					modifybtnlink(hashparams);
				}
			);
			
			valperpage.change(
				function(){
					valperpage.val($(this).val());
					perpage = parseint($(this).val());
					currentpage = 1;
					totalpage = math.ceil(totalrecord/perpage);
					if(groupsize){
						getgroupstartend();
						getstartend();
						getremotedata();
					}else{
						getstartend();
						loaddata();
						refresh();				
					}			
				}
			);

			if (typeof zh_choose != 'undefined' && zh_choose == 't') {//转繁体
				zh_tran('t');
			}
			
			/*********************************init私有函数***************************************************/
			/**
			   * 置为正在检索状态
			   */
			function startload(){
				$(t).addclass(themename+"_container");
				mask = document.createelement('div');
				$(mask).addclass(themename+"_mask");
				$(mask).css("height",$(t).height());
				$(t).append(mask);
				$(t+" ."+themename+"_pgrefresh").addclass(themename+"_pgload");
				//$(t+" ."+themename+"_pgsearchinfo").html("正在检索中，请稍后...");
			}
			
			/**
			   * 置为结束检索状态
			   */
			function overload(){
				$(t+" ."+themename+"_pgrefresh").removeclass(themename+"_pgload");
				$(t+" ."+themename+"_pgtotalrecord").text(totalrecord);
				$(t+" ."+themename+"_pgstartrecord").text(startrecord+gpstartrecord-1);
				$(t+" ."+themename+"_pgendrecord").text(endrecord+gpstartrecord-1);
				$(mask).remove();
				$(t).removeclass(themename+"_container");
				valstartrecord = $(t+" ."+themename+"_pgstartrecord");
				valendrecord =$(t+" ."+themename+"_pgendrecord");
			}
		
			/**
			   * 获得远程数据
			   */
			function getremotedata(){
				startload();
				$.ajax(
					{
						type: "post",
						url: proxyurl + "?startrecord="+gpstartrecord+"&endrecord="+gpendrecord+"&perpage="+perpage,
						cache: false,
						data: ajaxparam,
						datatype: "xml",
						timeout: 30000,
						success: function(xml){
							xmlstore = $(xml);
							totalrecord = xmlstore.find('totalrecord').text();
							totalpage = xmlstore.find('totalpage').text();
							datastore = null;
							datastore = new array();
							xmlstore.find('record').each(
								function(){
									datastore.push($(this).text());
								}
							);
							
							if(totalrecord==0)
								$('.'+themename+'_pgtoolbar').remove();
							getstartend();
							loaddata();
							refresh();
							overload();
						},
						error: function(){
							alert(lang.error);
							overload();
							return;
						}
					}
				);
			}

			/**
			   * 获得当前页开始结束记录
			   */
			function getstartend(){
				if(groupsize){
					startrecord = (currentpage-1)*perpage+1 - gpstartrecord + 1;
					endrecord = math.min(currentpage*perpage,totalrecord) - gpstartrecord + 1;
				}else{
					startrecord = (currentpage-1)*perpage+1;
					endrecord = math.min(currentpage*perpage,totalrecord);
				}
			}
		
			/**
			   * 获得当前组开始结束页码
			   */
			function getgroupstartend(){
				if(groupsize==null){
					return;
				}
				var groupid = groupsize > 0 ? math.ceil(currentpage/groupsize) : 0;
				gpstartpage = (groupid-1)*groupsize+1;
				if(totalrecord > 0){
					gpendpage = math.min(groupid*groupsize,totalpage);
				}
				
				gpstartrecord = (gpstartpage-1)*perpage+1;
				if(totalrecord > 0){
					gpendrecord = math.min(gpendpage*perpage,totalrecord);
				}
			}
		
			/**
			   * 刷新数据容器
			   */
			function loaddata(){
				if(datastore==null||datastore.length==0){
					valcontainer.css("text-align","left");
					valcontainer.css("line-height","22px");
					valcontainer.html(lang.norecord);
					return;
				}
				
				var view = "";
				for(var i=startrecord-1;i<=endrecord-1 && i < datastore.length;i++){
					view += datastore[i].replace("{id}",gpstartrecord+i);
				}
				valcontainer.html(databefore + view + dataafter);
				
				//翻页回调函数
				callback();
			}
		
			/**
			   * 刷新工具栏状态
			   */
			function refresh(){
				if(opencookies){
					//当前页码写入cookie
					$.cookie(t+'_currentpage', currentpage);
					$.cookie(t+'_perpage', perpage);
				}
		
				valcurrentpage.val(currentpage);
				valstartrecord.html(startrecord+gpstartrecord-1);
				valendrecord.html(endrecord+gpstartrecord-1);
				valtotalpage.html(totalpage);
				
				btn.unbind("mousedown",presshandler);
				btn.bind("mouseup",unpresshandler);
				btn.bind("mouseout",unpresshandler);
				
				if(currentpage == 1 && currentpage != totalpage){
					enabled();
					btngo.bind("mousedown",presshandler);
					btnprev.addclass(themename+"_pgprevdisabled").attr('disabled', 'disabled');
					btnfirst.addclass(themename+"_pgfirstdisabled").attr('disabled', 'disabled');
				}else if(currentpage != 1 && currentpage == totalpage){
					enabled();
					btnback.bind("mousedown",presshandler);
					btnnext.addclass(themename+"_pgnextdisabled").attr('disabled', 'disabled');
					btnlast.addclass(themename+"_pglastdisabled").attr('disabled', 'disabled');
				}else if(currentpage == 1 && currentpage == totalpage){
					disabled();
				}else{
					enabled();
					btnback.bind("mousedown",presshandler);
					btngo.bind("mousedown",presshandler);
					btnnext.addclass(themename+"_pgnext");
					btnprev.addclass(themename+"_pgprev");
					btnfirst.addclass(themename+"_pgfirst");
					btnlast.addclass(themename+"_pglast");
				}
				
			}
			
			/**
			   * 移除按钮disabled状态样式
			   */
			function enabled(){
					btnnext.removeclass(themename+"_pgnextdisabled").removeattr('disabled');
					btnprev.removeclass(themename+"_pgprevdisabled").removeattr('disabled');
					btnfirst.removeclass(themename+"_pgfirstdisabled").removeattr('disabled');
					btnlast.removeclass(themename+"_pglastdisabled").removeattr('disabled');
			}
			
			/**
			   * 添加按钮disabled状态样式
			   */
			function disabled(){
					btnnext.addclass(themename+"_pgnextdisabled").attr('disabled', 'disabled');
					btnprev.addclass(themename+"_pgprevdisabled").attr('disabled', 'disabled');
					btnfirst.addclass(themename+"_pgfirstdisabled").attr('disabled', 'disabled');
					btnlast.addclass(themename+"_pglastdisabled").attr('disabled', 'disabled');
			}
		
			/**
			   * 添加按钮按下状态样式
			   */
			function presshandler(){
				$(this).addclass(themename+"_pgpress");
			}
		
			/**
			   * 移除按钮按下状态样式
			   */
			function unpresshandler(){
				$(this).removeclass(themename+"_pgpress");
			}
			
			/**
			 * 修改按钮链接
			 */
			function modifybtnlink(hashparams) {
				var pagenum = hashparams.pagenum;
				hashparams.pagenum = pagenum + 1;
				btnnext.attr('href', geturl(hashparams));
				hashparams.pagenum = totalpage;
				btnlast.attr('href', geturl(hashparams));
				hashparams.pagenum = pagenum - 1;
				btnprev.attr('href', geturl(hashparams));
				hashparams.pagenum = 1;
				btnfirst.attr('href', geturl(hashparams));
			}
		}
		
		/**
		 * 创建xml文档
		 */
		function createxmldocument(text) {
			var xmldoc = null;
			try{// internet explorer
				xmldoc = new activexobject("microsoft.xmldom");
				xmldoc.async = "false";
				xmldoc.loadxml(text);
			}catch (e){
				try{// firefox, mozilla, opera, etc.
					parser = new domparser();
					xmldoc = parser.parsefromstring(text, "text/xml");
				}catch (e) {
				}
			}
			return xmldoc;
		}
		
		/**
		 * 组装页面路径
		 */
		function geturl(hashparams) {
			var pageurl = location.pathname;
			var pageparams = getpageparams(hashparams);
			
			if (canpushstate) {
				pageurl += '?' + $.param($.extend(pageparams, hashparams));
			} else {
				if (pageparams) {
					pageurl += '?' + $.param(pageparams);
				}
				pageurl += '#!' + $.param(hashparams);
			}
			return pageurl;
		}

		/**
		 * 获取url中原查询参数json
		 */
		function getpageparams(hashparams) {
			var pageurl = location.href;
			var pagequerystr = pageurl.split(/\?/)[1];
			var pageparams = null;
			if (pagequerystr) {
				pageparams = {};
				var hashindex = pagequerystr.indexof('#!');
				if (hashindex != -1) {
					pagequerystr = pagequerystr.substr(0, hashindex);
				}
				var pageparamsarray = pagequerystr.split('&');
				for (var i in pageparamsarray) {
					if(hashparams && hashparams[i]){
						continue;
					}
					var pageparam = pageparamsarray[i].split('=');
					pageparams[pageparam[0]] = unescape(pageparam[1]);
				}
			}
			return pageparams;
		}
		
		/**
		 * 获取当前页面参数
		 * @param name
		 * @returns
		 */
		function geturlparam(name, url) {
			url = url ? url : location.href;
            var reg = new regexp("(#!|&|\\?)" + name + "=([^&]*)(&|$)"); //构造一个含有目标参数的正则表达式对象
            var r = url.substr(1).match(reg);  //匹配目标参数
            if (r != null) return unescape(r[2]); return null; //返回参数值
        }

		function pushstate(hashparams) {
			var separate = canpushstate ? '?' : '#'
			if (canpushstate) {
				window.history.pushstate(null, null, geturl(hashparams));
			} else {
				window.location.hash = '#!' + $.param(hashparams);
			}
		}
	};
})(jquery);