/*
  kkpager v1.3
  https://github.com/pgkk/kkpager

  copyright (c) 2013 cqzhangkang@163.com
  licensed under the gnu general public license
*/
var kkpager = {
		pagerid 			: 'kkpager', //divid
		mode				: 'link', //模式(link 或者 click)
		pno					: 1, //当前页码
		total				: 1, //总页码
		totalrecords		: 0, //总数据条数
		isshowfirstpagebtn	: true, //是否显示首页按钮
		isshowlastpagebtn	: true, //是否显示尾页按钮
		isshowprepagebtn	: true, //是否显示上一页按钮
		isshownextpagebtn: true, //是否显示下一页按钮
		isshowtotalpage: false, //是否显示总页数
		isshowcurrpage: false, //是否显示当前页
		isshowtotalrecords 	: false, //是否显示总记录数
		isgopage 			: true,	//是否显示页码跳转输入框
		iswrapedpagebtns	: true,	//是否用span包裹住页码按钮
		iswrapedinfotextandgopagebtn : true, //是否用span包裹住分页信息和跳转按钮
		hrefformer			: '', //链接前部
		hreflatter			: '', //链接尾部
		gopagewrapid		: 'kkpager_gopage_wrap',
		gopagebuttonid		: 'kkpager_btn_go',
		gopagetextboxid		: 'kkpager_btn_go_input',
		lang				: {
			firstpagetext			: '首页',
			firstpagetiptext		: '首页',
			lastpagetext			: '尾页',
			lastpagetiptext			: '尾页',
			prepagetext				: '上一页',
			prepagetiptext			: '上一页',
			nextpagetext			: '下一页',
			nextpagetiptext			: '下一页',
			totalpagebeforetext		: '共',
			totalpageaftertext		: '页',
			currpagebeforetext		: '当前第',
			currpageaftertext		: '页',
			totalinfosplitstr		: '/',
			totalrecordsbeforetext	: '共',
			totalrecordsaftertext	: '条数据',
			gopagebeforetext		: ' 转到',
			gopagebuttonoktext		: '确定',
			gopageaftertext			: '页',
			buttontipbeforetext		: '第',
			buttontipaftertext		: '页'
		},
		//链接算法（当处于link模式）,参数n为页码
		getlink	: function(n){
			//这里的算法适用于比如：
			//hrefformer=http://www.xx.com/news/20131212
			//hreflatter=.html
			//那么首页（第1页）就是http://www.xx.com/news/20131212.html
			//第2页就是http://www.xx.com/news/20131212_2.html
			//第n页就是http://www.xx.com/news/20131212_n.html
			if(n == 1){
				return this.hrefformer + this.hreflatter;
			}
			return this.hrefformer + '_' + n + this.hreflatter;
		},
		//页码单击事件处理函数（当处于mode模式）,参数n为页码
		click	: function(n){
			//这里自己实现
			//这里可以用this或者kkpager访问kkpager对象
			return false;
		},
		//获取href的值（当处于mode模式）,参数n为页码
		gethref	: function(n){
			//默认返回'#'
			return '#';
		},
		//跳转框得到输入焦点时
		focus_gopage : function (){
			var btngo = $('#'+this.gopagebuttonid);
			$('#'+this.gopagetextboxid).attr('hidefocus',true);
			btngo.show();
			btngo.css('left','10px');
			$('#'+this.gopagetextboxid).addclass('focus');
			btngo.animate({left: '+=30'}, 50);
		},
		//跳转框失去输入焦点时
		blur_gopage : function(){
			var _this = this;
			settimeout(function(){
				var btngo = $('#'+_this.gopagebuttonid);
				btngo.animate({
				    left: '-=25'
				  }, 100, function(){
					  btngo.hide();
					  $('#'+_this.gopagetextboxid).removeclass('focus');
				  });
			},400);
		},
		//跳转输入框按键操作
		keypress_gopage : function(){
			var event = arguments[0] || window.event;
			var code = event.keycode || event.charcode;
			//delete key
			if(code == 8) return true;
			//enter key
			if(code == 13){
				kkpager.gopage();
				return false;
			}
			//copy and paste
			if(event.ctrlkey && (code == 99 || code == 118)) return true;
			//only number key
			if(code<48 || code>57)return false;
			return true;
		},
		//跳转框页面跳转
		gopage : function(){
			var str_page = $('#'+this.gopagetextboxid).val();
			if(isnan(str_page)){
				$('#'+this.gopagetextboxid).val(this.next);
				return;
			}
			var n = parseint(str_page);
			if(n < 1) n = 1;
			if(n > this.total) n = this.total;
			if(this.mode == 'click'){
				this._clickhandler(n);
			}else{
				window.location = this.getlink(n);
			}
		},
		//不刷新页面直接手动调用选中某一页码
		selectpage : function(n){
			this._config['pno'] = n;
			this.generpagehtml(this._config,true);
		},
		//生成控件代码
		generpagehtml : function(config,enforceinit){
			if(enforceinit || !this.inited){
				this.init(config);
			}
			
			var str_first='',str_prv='',str_next='',str_last='';
			if(this.isshowfirstpagebtn){
				if(this.hasprv){
					str_first = '<a '+this._gethandlerstr(1)+' title="'
						+(this.lang.firstpagetiptext || this.lang.firstpagetext)+'">'+this.lang.firstpagetext+'</a>';
				}else{
					str_first = '<span class="disabled">'+this.lang.firstpagetext+'</span>';
				}
			}
			if(this.isshowprepagebtn){
				if(this.hasprv){
					str_prv = '<a '+this._gethandlerstr(this.prv)+' title="'
						+ (this.lang.prepagetiptext || this.lang.prepagetext) + '" >' + this.lang.prepagetext + '</a>';
				}else{
					str_prv = '<span class="disabled">'+this.lang.prepagetext+'</span>';
				}
			}
			if(this.isshownextpagebtn){
				if(this.hasnext){
					str_next = '<a '+this._gethandlerstr(this.next)+' title="'
						+(this.lang.nextpagetiptext || this.lang.nextpagetext)+'">'+this.lang.nextpagetext+'</a>';
				}else{
					str_next = '<span class="disabled">'+this.lang.nextpagetext+'</span>';
				}
			}
			if(this.isshowlastpagebtn){
				if(this.hasnext){
					str_last = '<a '+this._gethandlerstr(this.total)+' title="'
						+(this.lang.lastpagetiptext || this.lang.lastpagetext)+'">'+this.lang.lastpagetext+'</a>';
				}else{
					str_last = '<span class="disabled">'+this.lang.lastpagetext+'</span>';
				}
			}
			var str = '';
			var dot = '<span class="spandot">...</span>';
			var total_info='<span class="totaltext">';
			var total_info_splitstr = '<span class="totalinfosplitstr">'+this.lang.totalinfosplitstr+'</span>';
			if(this.isshowcurrpage){
				total_info += this.lang.currpagebeforetext + '<span class="currpagenum">' + this.pno + '</span>' + this.lang.currpageaftertext;
				if(this.isshowtotalpage){
					total_info += total_info_splitstr;
					total_info += this.lang.totalpagebeforetext + '<span class="totalpagenum">'+this.total + '</span>' + this.lang.totalpageaftertext;
				}else if(this.isshowtotalrecords){
					total_info += total_info_splitstr;
					total_info += this.lang.totalrecordsbeforetext + '<span class="totalrecordnum">'+this.totalrecords + '</span>' + this.lang.totalrecordsaftertext;
				}
			}else if(this.isshowtotalpage){
				total_info += this.lang.totalpagebeforetext + '<span class="totalpagenum">'+this.total + '</span>' + this.lang.totalpageaftertext;;
				if(this.isshowtotalrecords){
					total_info += total_info_splitstr;
					total_info += this.lang.totalrecordsbeforetext + '<span class="totalrecordnum">'+this.totalrecords + '</span>' + this.lang.totalrecordsaftertext;
				}
			}else if(this.isshowtotalrecords){
				total_info += this.lang.totalrecordsbeforetext + '<span class="totalrecordnum">'+this.totalrecords + '</span>' + this.lang.totalrecordsaftertext;
			}
			total_info += '</span>';
			
			var gopage_info = '';
			if(this.isgopage){
				gopage_info = '<span class="gopagebox">'+this.lang.gopagebeforetext+'<span id="'+this.gopagewrapid+'">'+
					'<input type="button" id="'+this.gopagebuttonid+'" onclick="kkpager.gopage()" value="'
						+this.lang.gopagebuttonoktext+'" />'+
					'<input type="text" id="'+this.gopagetextboxid+'" onfocus="kkpager.focus_gopage()"  onkeypress="return kkpager.keypress_gopage(event);"   onblur="kkpager.blur_gopage()" value="'+this.next+'" /></span>'+this.lang.gopageaftertext+'</span>';
			}
			
			//分页处理
			if(this.total <= 5){
				for(var i=1;i<=this.total;i++){
					if(this.pno == i){
						str += '<span class="curr">'+i+'</span>';
					}else{
						str += '<a '+this._gethandlerstr(i)+' title="'
							+this.lang.buttontipbeforetext + i + this.lang.buttontipaftertext+'">'+i+'</a>';
					}
				}
			}else{
				if(this.pno <= 3){
					for(var i=1;i<=5;i++){
						if(this.pno == i){
							str += '<span class="curr">'+i+'</span>';
						}else{
							str += '<a '+this._gethandlerstr(i)+' title="'+
								this.lang.buttontipbeforetext + i + this.lang.buttontipaftertext+'">'+i+'</a>';
						}
					}
					str += dot;
				}else{
					str += '<a '+this._gethandlerstr(1)+' title="'
						+this.lang.buttontipbeforetext + '1' + this.lang.buttontipaftertext+'">1</a>';
					str += '<a '+this._gethandlerstr(2)+' title="'
						+this.lang.buttontipbeforetext + '2' + this.lang.buttontipaftertext +'">2</a>';
					str += dot;
					
					var begin = this.pno - 2;
					var end = this.pno + 2;
					if(end > this.total){
						end = this.total;
						begin = end - 4;
						if(this.pno - begin < 2){
							begin = begin-1;
						}
					}else if(end + 1 == this.total){
						end = this.total;
					}
					for(var i=begin;i<=end;i++){
						if(this.pno == i){
							str += '<span class="curr">'+i+'</span>';
						}else{
							str += '<a '+this._gethandlerstr(i)+' title="'
								+this.lang.buttontipbeforetext + i + this.lang.buttontipaftertext+'">'+i+'</a>';
						}
					}
					if(end != this.total){
						str += dot;
					}
				}
			}
			var pagerhtml = '<div>';
			if(this.iswrapedpagebtns){
				pagerhtml += '<span class="pagebtnwrap">' + str_first + str_prv + str + str_next + str_last + '</span>'
			}else{
				pagerhtml += str_first + str_prv + str + str_next + str_last;
			}
			if(this.iswrapedinfotextandgopagebtn){
				pagerhtml += '<span class="infotextandgopagebtnwrap">' + total_info + gopage_info + '</span>';
			}else{
				pagerhtml += total_info + gopage_info;
			}
			pagerhtml += '</div><div style="clear:both;"></div>';
			$("#"+this.pagerid).html(pagerhtml);
		},
		//分页按钮控件初始化
		init : function(config){

			this.pno = isnan(config.pno) ? 1 : parseint(config.pno);
			this.total = isnan(config.total) ? 1 : parseint(config.total);
			this.totalrecords = isnan(config.totalrecords) ? 0 : parseint(config.totalrecords);
			if(config.pagerid){this.pagerid = config.pagerid;}
			if(config.mode){this.mode = config.mode;}
			if(config.gopagewrapid){this.gopagewrapid = config.gopagewrapid;}
			if(config.gopagebuttonid){this.gopagebuttonid = config.gopagebuttonid;}
			if(config.gopagetextboxid){this.gopagetextboxid = config.gopagetextboxid;}
			if(config.isshowfirstpagebtn != undefined){this.isshowfirstpagebtn=config.isshowfirstpagebtn;}
			if(config.isshowlastpagebtn != undefined){this.isshowlastpagebtn=config.isshowlastpagebtn;}
			if(config.isshowprepagebtn != undefined){this.isshowprepagebtn=config.isshowprepagebtn;}
			if(config.isshownextpagebtn != undefined){this.isshownextpagebtn=config.isshownextpagebtn;}
			if(config.isshowtotalpage != undefined){this.isshowtotalpage=config.isshowtotalpage;}
			if(config.isshowcurrpage != undefined){this.isshowcurrpage=config.isshowcurrpage;}
			if(config.isshowtotalrecords != undefined){this.isshowtotalrecords=config.isshowtotalrecords;}
			if(config.iswrapedpagebtns){this.iswrapedpagebtns=config.iswrapedpagebtns;}
			if(config.iswrapedinfotextandgopagebtn){this.iswrapedinfotextandgopagebtn=config.iswrapedinfotextandgopagebtn;}
			if(config.isgopage != undefined){this.isgopage=config.isgopage;}
			if(config.lang){
				for(var key in config.lang){
					this.lang[key] = config.lang[key];
				}
			}
			this.hrefformer = config.hrefformer || '';
			this.hreflatter = config.hreflatter || '';
			if(config.getlink && typeof(config.getlink) == 'function'){this.getlink = config.getlink;}
			if(config.click && typeof(config.click) == 'function'){this.click = config.click;}
			if(config.gethref && typeof(config.gethref) == 'function'){this.gethref = config.gethref;}
			if(!this._config){
				this._config = config;
			}
			//validate
			if(this.pno < 1) this.pno = 1;
			this.total = (this.total <= 1) ? 1: this.total;
			if(this.pno > this.total) this.pno = this.total;
			this.prv = (this.pno<=2) ? 1 : (this.pno-1);
			this.next = (this.pno >= this.total-1) ? this.total : (this.pno + 1);
			this.hasprv = (this.pno > 1);
			this.hasnext = (this.pno < this.total);
			
			this.inited = true;
		},
		_gethandlerstr : function(n){
			if(this.mode == 'click'){
				return 'href="'+this.gethref(n)+'" onclick="return kkpager._clickhandler('+n+')"';
			}
			//link模式，也是默认的
			return 'href="'+this.getlink(n)+'"';
		},
		_clickhandler	: function(n){
			var res = false;
			if(this.click && typeof this.click == 'function'){
				res = this.click.call(this,n) || false;
			}
			return res;
		}
};