/**
 * 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',         //首页节点内容
        endpage: '尾页',          //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 * 1 || opts.current * 1;//当前页码
            var pagecount = this.getpagecount();//获取的总页数
          
            if(opts.keepshowpn || current > 1){//上一页
                html += '<a 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 && pagecount != 5){
                var home = opts.coping && opts.homepage ? opts.homepage : '1';
                html += opts.coping ? '<a 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 data-page="'+start+'">'+ start +'</a>';
                    }else{
                        html += '<span class="'+opts.activecls+'">'+start+'</span>';
                    }
                }
            }
            if(current + opts.count < pagecount && current >= 1 && pagecount > opts.count  && pagecount != 5){
                var end = opts.coping && opts.endpage ? opts.endpage : pagecount;
                html += opts.coping ? '<span>...</span><a data-page="'+pagecount+'">'+end+'</a>' : '';
            }
            if(opts.keepshowpn || current < pagecount){//下一页
                html += '<a 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 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);
        });
    };

}));