/**
 * pagination分页插件
 * @version 1.3.1
 * @author mss
 * @url http://maxiaoxiang.com/jquery-plugins/plugins/pagination.html
 *
 * @调用方法
 * $(selector).pagination();
 */
;(function (factory) {
    if (typeof define === "function" && (define.amd || define.cmd) && !jquery) {
        // amd或cmd
        define([ "jquery" ],factory);
    } else if (typeof module === 'object' && module.exports) {
        // node/commonjs
        module.exports = function( root, jquery ) {
            if ( jquery === undefined ) {
                if ( typeof window !== 'undefined' ) {
                    jquery = require('jquery');
                } else {
                    jquery = require('jquery')(root);
                }
            }
            factory(jquery);
            return jquery;
        };
    } else {
        //browser globals
        factory(jquery);
    }
}(function ($) {

	//配置参数
	var defaults = {
		totaldata: 0,			//数据总条数
		showdata: 0,			//每页显示的条数
		pagecount: 9,			//总页数,默认为9
		current: 1,				//当前第几页
		prevcls: 'prev',		//上一页class
		nextcls: 'next',		//下一页class
		prevcontent: '<',		//上一页内容
		nextcontent: '>',		//下一页内容
		activecls: 'active',	//当前页选中状态
		coping: false,			//首页和尾页
		ishide: false,			//当前页数为0页或者1页时不显示分页
		homepage: '',			//首页节点内容
		endpage: '',			//尾页节点内容
		keepshowpn: false,		//是否一直显示上一页下一页
		count: 3,				//当前页前后分页个数
		jump: false,			//跳转到指定页数
		jumpiptcls: 'jump-ipt',	//文本框内容
		jumpbtncls: 'jump-btn',	//跳转按钮
		jumpbtn: '跳转',		//跳转按钮文本
		callback: function(){}	//回调
	};

	var pagination = function(element,options){
		//全局变量
		var opts = options,//配置
			current,//当前页
			$document = $(document),
			$obj = $(element);//容器

		/**
		 * 设置总页数
		 * @param int page 页码
		 * @return opts.pagecount 总页数配置
		 */
		this.setpagecount = function(page){
			return opts.pagecount = page;
		};

		/**
		 * 获取总页数
		 * 如果配置了总条数和每页显示条数，将会自动计算总页数并略过总页数配置，反之
		 * @return int p 总页数
		 */
		this.getpagecount = function(){
			return opts.totaldata || opts.showdata ? math.ceil(parseint(opts.totaldata) / opts.showdata) : opts.pagecount;
		};

		/**
		 * 获取当前页
		 * @return int current 当前第几页
		 */
		this.getcurrent = function(){
			return current;
		};

		/**
		 * 填充数据
		 * @param int index 页码
		 */
		this.filling = function(index){
			var html = '';
			current = index || opts.current;//当前页码
			var pagecount = this.getpagecount();//获取的总页数
			if(opts.keepshowpn || current > 1){//上一页
				html += '<a href="javascript:;" class="'+opts.prevcls+'">'+opts.prevcontent+'</a>';
			}else{
				if(opts.keepshowpn == false){
					$obj.find('.'+opts.prevcls) && $obj.find('.'+opts.prevcls).remove();
				}
			}
			if(current >= opts.count + 2 && current != 1 && pagecount != opts.count){
				var home = opts.coping && opts.homepage ? opts.homepage : '1';
				html += opts.coping ? '<a href="javascript:;" data-page="1">'+home+'</a><span>...</span>' : '';
			}
			var end = current + opts.count;
			var start = '';
			//修复到最后一页时比第一页少显示两页
			start = current === pagecount ? current - opts.count - 2 : current - opts.count;
			((start > 1 && current < opts.count) || current == 1) && end++;
			(current > pagecount - opts.count && current >= pagecount) && start++;
			for (;start <= end; start++) {
				if(start <= pagecount && start >= 1){
					if(start != current){
						html += '<a href="javascript:;" data-page="'+start+'">'+ start +'</a>';
					}else{
						html += '<span class="'+opts.activecls+'">'+start+'</span>';
					}
				}
			}
			if(current + opts.count < pagecount && current >= 1 && pagecount > opts.count){
				var end = opts.coping && opts.endpage ? opts.endpage : pagecount;
				html += opts.coping ? '<span>...</span><a href="javascript:;" data-page="'+pagecount+'">'+end+'</a>' : '';
			}
			if(opts.keepshowpn || current < pagecount){//下一页
				html += '<a href="javascript:;" class="'+opts.nextcls+'">'+opts.nextcontent+'</a>'
			}else{
				if(opts.keepshowpn == false){
					$obj.find('.'+opts.nextcls) && $obj.find('.'+opts.nextcls).remove();
				}
			}
			html += opts.jump ? '<input type="text" class="'+opts.jumpiptcls+'"><a href="javascript:;" class="'+opts.jumpbtncls+'">'+opts.jumpbtn+'</a>' : '';
			$obj.empty().html(html);
		};

		//绑定事件
		this.eventbind = function(){
			var that = this;
			var pagecount = that.getpagecount();//总页数
			var index = 1;
			$obj.off().on('click','a',function(){
				if($(this).hasclass(opts.nextcls)){
					if($obj.find('.'+opts.activecls).text() >= pagecount){
						$(this).addclass('disabled');
						return false;
					}else{
						index = parseint($obj.find('.'+opts.activecls).text()) + 1;
					}
				}else if($(this).hasclass(opts.prevcls)){
					if($obj.find('.'+opts.activecls).text() <= 1){
						$(this).addclass('disabled');
						return false;
					}else{
						index = parseint($obj.find('.'+opts.activecls).text()) - 1;
					}
				}else if($(this).hasclass(opts.jumpbtncls)){
					if($obj.find('.'+opts.jumpiptcls).val() !== ''){
						index = parseint($obj.find('.'+opts.jumpiptcls).val());
					}else{
						return;
					}
				}else{
					index = parseint($(this).data('page'));
				}
				that.filling(index);
				typeof opts.callback === 'function' && opts.callback(that);
			});
			//输入跳转的页码
			$obj.on('input propertychange','.'+opts.jumpiptcls,function(){
				var $this = $(this);
				var val = $this.val();
				var reg = /[^\d]/g;
	            if (reg.test(val)) {
	                $this.val(val.replace(reg, ''));
	            }
	            (parseint(val) > pagecount) && $this.val(pagecount);
	            if(parseint(val) === 0){//最小值为1
	            	$this.val(1);
	            }
			});
			//回车跳转指定页码
			$document.keydown(function(e){
		        if(e.keycode == 13 && $obj.find('.'+opts.jumpiptcls).val()){
		        	var index = parseint($obj.find('.'+opts.jumpiptcls).val());
		            that.filling(index);
					typeof opts.callback === 'function' && opts.callback(that);
		        }
		    });
		};

		//初始化
		this.init = function(){
			this.filling(opts.current);
			this.eventbind();
			if(opts.ishide && this.getpagecount() == '1' || this.getpagecount() == '0') $obj.hide();
		};
		this.init();
	};

	$.fn.pagination = function(parameter,callback){
		if(typeof parameter == 'function'){//重载
			callback = parameter;
			parameter = {};
		}else{
			parameter = parameter || {};
			callback = callback || function(){};
		}
		var options = $.extend({},defaults,parameter);
		return this.each(function(){
			var pagination = new pagination(this, options);
			callback(pagination);
		});
	};

}));