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

  copyright (c) 2013 cqzhangkang@163.com
  licensed under the gnu general public license
*/
function kkpager() {
	this.pagerid = 'kkpager'; //divid
	this.mode = 'link'; //模式(link 或者 click)
	this.pno = 1; //当前页码
	this.total = 1; //总页码
	this.totalrecords = 0; //总数据条数
	this.isshowfirstpagebtn = true; //是否显示首页按钮
	this.isshowlastpagebtn = true; //是否显示尾页按钮
	this.isshowprepagebtn = true; //是否显示上一页按钮
	this.isshownextpagebtn = true; //是否显示下一页按钮
	this.isshowtotalpage = true; //是否显示总页数
	this.isshowcurrpage = true;//是否显示当前页
	this.isshowtotalrecords = false; //是否显示总记录数
	this.isgopage = true;	//是否显示页码跳转输入框
	this.iswrapedpagebtns = true;	//是否用span包裹住页码按钮
	this.iswrapedinfotextandgopagebtn = true; //是否用span包裹住分页信息和跳转按钮
	this.hrefformer = ''; //链接前部
	this.hreflatter = ''; //链接尾部
	this.gopagewrapid = 'kkpager_gopage_wrap';
	this.gopagebuttonid = 'kkpager_btn_go';
	this.gopagetextboxid = 'kkpager_btn_go_input';
	this.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
	this.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
	this.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
	this.gethref = function (n) {
		//默认返回'#'
		return '#';
	};
	//跳转框得到输入焦点时
	this.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
	this.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
	this.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
	this.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);
		}
	};
	//下拉选择某一页码 
	this.selectpage = function (n) {

	};
	this.setpage = function(n){
		this._config['pno'] = n;
		this.generpagehtml(this._config,true);
	};
	this.settotalpage = function(t){
		this._config['total'] = t;
	};
	this.settotalcount = function(t){
		this._config['totalrecords'] = t;
	};
	this.render = function(){
		this.generpagehtml(this._config, true);
	};
	//生成控件代码
	this.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) + ' class="btn first_btn"  title="'
					+ (this.lang.firstpagetiptext || this.lang.firstpagetext) + '">' + this.lang.firstpagetext + '</a>';
			} else {
				str_first = '<span class="btn first_btn disabled"   >' + this.lang.firstpagetext + '</span>';
			}
		}
		if (this.isshowprepagebtn) {
			if (this.hasprv) {
				str_prv = '<a ' + this._gethandlerstr(this.prv) + ' class="btn prev_btn"  title="'
					+ (this.lang.prepagetiptext || this.lang.prepagetext) + '">' + this.lang.prepagetext + '</a>';
			} else {
				str_prv = '<span class="btn prev_btn disabled" >' + this.lang.prepagetext + '</span>';
			}
		}
		if (this.isshownextpagebtn) {
			if (this.hasnext) {
				str_next = '<a ' + this._gethandlerstr(this.next) + ' class="btn next_btn" title="'
					+ (this.lang.nextpagetiptext || this.lang.nextpagetext) + '">' + this.lang.nextpagetext + '</a>';
			} else {
				str_next = '<span class="btn next_btn disabled ">' + this.lang.nextpagetext + '</span>';
			}
		}
		if (this.isshowlastpagebtn) {
			if (this.hasnext) {
				str_last = '<a ' + this._gethandlerstr(this.total) + '  class="btn last_btn" title="'
					+ (this.lang.lastpagetiptext || this.lang.lastpagetext) + '">' + this.lang.lastpagetext + '</a>';
			} else {
				str_last = '<span class="btn last_btn 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 <= 8) {
			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 <= 5) {
				for (var i = 1; i <= 7; 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">';
			pagerhtml += str_first + str_prv + str + str_next + str_last;

			pagerhtml += '<span class="go_select_span" ><select class="go_select" ><option value="">跳转</option>';
			for (var i = 1; i <= this.total; i++) {
				pagerhtml += '<option value="' + i + '">' + i + '</option>';
			}
			pagerhtml += '</select></span>';

			pagerhtml += '</span>'
		} else {
			pagerhtml += str_first + str_prv + str + str_next + str_last;
			
			pagerhtml += '<span class="go_select_span" ><select class="go_select" ><option value="">跳转</option>';
			for (var i = 1; i <= this.total; i++) {
				pagerhtml += '<option value="' + i + '">' + i + '</option>';
			}
			pagerhtml += '</select></span>';

		}
		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);
		this.bindpagerhtml();
	};

	this.bindpagerhtml = function(){
		var that = this;
		if (this.mode == 'click') {
			$("#" + this.pagerid).find("a").each(function(idx, el){ 
				$(el).click(function(){
					var page = parseint($(this).attr("page")); 
					that._clickhandler(page);
				});
			});
		}
		
		$("#" + this.pagerid).find(".go_select").change(function(){
			var p = $(this).val();
			if(p == "") return;
			that.selectpage.call(that, p)
		});
	};

	//分页按钮控件初始化
	this.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.selectpage && typeof (config.selectpage) == 'function') { this.selectpage = config.selectpage; }
		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;
	};
	this._gethandlerstr = function (n) {
		if (this.mode == 'click') {
			return 'page="'+ n + '"';
		}
		//link模式，也是默认的
		return 'href="' + this.getlink(n) + '"';
	};
	this._clickhandler = function (n) {
		var res = false;
		if (this.click && typeof this.click == 'function') {
			res = this.click.call(this, n) || false;
		}
		return res;
	};
}