(function ($, window, document, undefined) {
    //定义分页类
    function Paging(element, options) {
        this.element = element;
        //传入形参
        this.options = {
            pageNo: options.pageNo || 1,
            totalPage: options.totalPage,
            totalSize: options.totalSize,
            callback: options.callback
        };
        //根据形参初始化分页html和css代码
        this.init();
    }
    //对Paging的实例对象添加公共的属性和方法
    Paging.prototype = {
        constructor: Paging,
        init: function () {
            this.creatHtml();
            this.bindEvent();
        },
        creatHtml: function () {
            var me = this;
            var content = "";
            var current = me.options.pageNo;
            var total = me.options.totalPage;
            var totalNum = me.options.totalSize;
            content += "<a id=\"firstPage\">首页</a><a id='prePage'>上一页</a>";
            //总页数大于6时候
            if (total > 6) {
                //当前页数小于5时显示省略号
                if (current < 5) {
                    for (var i = 1; i < 6; i++) {
                        if (current == i) {
                            content += "<a class='current'>" + i + "</a>";
                        } else {
                            content += "<a>" + i + "</a>";
                        }
                    }
                    content += ". . .";
                    content += "<a>" + total + "</a>";
                } else {
                    //判断页码在末尾的时候
                    if (current < total - 3) {
                        for (var i = current - 2; i < current + 3; i++) {
                            if (current == i) {
                                content += "<a class='current'>" + i + "</a>";
                            } else {
                                content += "<a>" + i + "</a>";
                            }
                        }
                        content += ". . .";
                        content += "<a>" + total + "</a>";
                        //页码在中间部分时候	
                    } else {
                        content += "<a>1</a>";
                        content += ". . .";
                        for (var i = total - 4; i < total + 1; i++) {
                            if (current == i) {
                                content += "<a class='current'>" + i + "</a>";
                            } else {
                                content += "<a>" + i + "</a>";
                            }
                        }
                    }
                }
                //页面总数小于6的时候
            } else {
                for (var i = 1; i < total + 1; i++) {
                    if (current == i) {
                        content += "<a class='current'>" + i + "</a>";
                    } else {
                        content += "<a>" + i + "</a>";
                    }
                }
            }
            content += "<a id='nextPage'>下一页</a>";
            content += "<a id=\"lastPage\">尾页</a>";
            // content += "<span class='totalPages'> 共<span>" + total + "</span>页 </span>";
            // content += "<span class='totalSize'> 共<span>" + totalNum + "</span>条记录 </span>";
            me.element.html(content);
        },
        //添加页面操作事件
        bindEvent: function () {
            var me = this;
            me.element.off('click', 'a');
            me.element.on('click', 'a', function () {
                var num = $(this).html();
                var id = $(this).attr("id");
                if (id == "prePage") {
                    if (me.options.pageNo == 1) {
                        me.options.pageNo = 1;
                    } else {
                        me.options.pageNo = +me.options.pageNo - 1;
                    }
                } else if (id == "nextPage") {
                    if (me.options.pageNo == me.options.totalPage) {
                        me.options.pageNo = me.options.totalPage
                    } else {
                        me.options.pageNo = +me.options.pageNo + 1;
                    }

                } else if (id == "firstPage") {
                    me.options.pageNo = 1;
                } else if (id == "lastPage") {
                    me.options.pageNo = Math.ceil(me.options.totalPage);
                } else {
                    me.options.pageNo = +num;
                }
                me.creatHtml();
                if (me.options.callback) {
                    me.options.callback(me.options.pageNo);
                }
            });
        }
    };
    //通过jQuery对象初始化分页对象
    $.fn.paging = function (options) {
        return new Paging($(this), options);
    }
})(jQuery, window, document);