(function ($) {
//修改地址id
    function pageurl(id) {
        var urlSearch = location.href;
        var unformatStr = changeURLArg(urlSearch, "page", id);
        if (!!(window.history && history.pushState)) {
            history.replaceState(null, "", unformatStr);
        }
    }

    function changeURLArg(url, arg, arg_val) {
        var pattern = arg + '=([^&]*)';
        var replaceText = arg + '=' + arg_val;
        if (url.match(pattern)) {
            var tmp = '/(' + arg + '=)([^&]*)/gi';
            tmp = url.replace(eval(tmp), replaceText);
            return tmp;
        } else {
            if (url.match('[\?]')) {
                return url + '&' + replaceText;
            } else {
                return url + '?' + replaceText;
            }
        }
    }

    function getUrlParms(name) {
        var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
        var r = window.location.search.substr(1).match(reg);
        if (r != null)
            return unescape(r[2]);
        return "1";
    }

//获取地址id
    var getid = getUrlParms("page");


    var methods = {
        init: function (options) {
            var o = $.extend({
                items: 1,
                itemsOnPage: 1,
                pages: 0,
                displayedPages: 5,
                edges: '',
                currentPage: getid,
                prevText: '上一页',
                nextText: '下一页',
                ellipseText: '…',
                cssStyle: '',
                labelMap: [],
                selectOnClick: true,
                onPageClick: function (pageNumber, event) {
                    //点击加载
                },
                onInit: function (getid) {
                    //初始页面
                }
            }, options || {});


            var self = this;

            o.pages = o.pages ? o.pages : Math.ceil(o.items / o.itemsOnPage) ? Math.ceil(o.items / o.itemsOnPage) : 1;
            o.currentPage = o.currentPage - 1;
            o.halfDisplayed = o.displayedPages / 2;

            this.each(function () {
                self.addClass(o.cssStyle + ' simple-pagination').data('pagination', o);
                methods._draw.call(self);
            });

            o.onInit(getid);

            return this;
        },

        selectPage: function (page) {
            methods._selectPage.call(this, page - 1);
            return this;
        },

        prevPage: function () {
            var o = this.data('pagination');
            if (o.currentPage > 0) {
                methods._selectPage.call(this, o.currentPage - 1);
            }
            return this;
        },

        nextPage: function () {
            var o = this.data('pagination');
            if (o.currentPage < o.pages - 1) {
                methods._selectPage.call(this, o.currentPage + 1);
            }
            return this;
        },

        getPagesCount: function () {
            return this.data('pagination').pages;
        },

        getCurrentPage: function () {
            return this.data('pagination').currentPage + 1;
        },

        destroy: function () {
            this.empty();
            return this;
        },

        drawPage: function (page) {
            var o = this.data('pagination');
            o.currentPage = page - 1;
            this.data('pagination', o);
            methods._draw.call(this);
            return this;
        },

        redraw: function () {
            methods._draw.call(this);
            return this;
        },

        disable: function () {
            var o = this.data('pagination');
            o.disabled = true;
            this.data('pagination', o);
            methods._draw.call(this);
            return this;
        },

        enable: function () {
            var o = this.data('pagination');
            o.disabled = false;
            this.data('pagination', o);
            methods._draw.call(this);
            return this;
        },

        updateItems: function (newItems) {
            var o = this.data('pagination');
            o.items = newItems;
            o.pages = methods._getPages(o);
            this.data('pagination', o);
            methods._draw.call(this);
        },

        updateItemsOnPage: function (itemsOnPage) {
            var o = this.data('pagination');
            o.itemsOnPage = itemsOnPage;
            o.pages = methods._getPages(o);
            this.data('pagination', o);
            methods._selectPage.call(this, 0);
            return this;
        },

        _draw: function () {
            var o = this.data('pagination'),
                interval = methods._getInterval(o),
                i,
                tagName;

            methods.destroy.call(this);

            tagName = (typeof this.prop === 'function') ? this.prop('tagName') : this.attr('tagName');

            var $panel = tagName === 'UL' ? this : $('<ul class="pagination"></ul>').appendTo(this);

            // Generate Prev link
            if (o.prevText) {
                methods._appendItem.call(this, o.currentPage - 1, {text: o.prevText, classes: 'prev'});
            }

            // Generate start edges
            if (interval.start > 0 && o.edges > 0) {
                var end = Math.min(o.edges, interval.start);
                for (i = 0; i < end; i++) {
                    methods._appendItem.call(this, i);
                }
                if (o.edges < interval.start && (interval.start - o.edges !== 1)) {
                    $panel.append('<li class="page-item disabled"><span class="page-link">' + o.ellipseText + '</span></li>');
                } else if (interval.start - o.edges === 1) {
                    methods._appendItem.call(this, o.edges);
                }
            }

            // Generate interval links
            for (i = interval.start; i < interval.end; i++) {
                methods._appendItem.call(this, i);
            }

            // Generate end edges
            if (interval.end < o.pages && o.edges > 0) {
                if (o.pages - o.edges > interval.end && (o.pages - o.edges - interval.end !== 1)) {
                    $panel.append('<li class="page-item disabled"><span class="page-link">' + o.ellipseText + '</span></li>');
                } else if (o.pages - o.edges - interval.end === 1) {
                    methods._appendItem.call(this, interval.end++);
                }
                var begin = Math.max(o.pages - o.edges, interval.end);
                for (i = begin; i < o.pages; i++) {
                    methods._appendItem.call(this, i);
                }
            }

            // Generate Next link
            if (o.nextText) {
                methods._appendItem.call(this, o.currentPage + 1, {text: o.nextText, classes: 'next'});
            }
        },

        _getPages: function (o) {
            var pages = Math.ceil(o.items / o.itemsOnPage);
            return pages || 1;
        },

        _getInterval: function (o) {
            return {
                start: Math.ceil(o.currentPage > o.halfDisplayed ? Math.max(Math.min(o.currentPage - o.halfDisplayed, (o.pages - o.displayedPages)), 0) : 0),
                end: Math.ceil(o.currentPage > o.halfDisplayed ? Math.min(o.currentPage + o.halfDisplayed, o.pages) : Math.min(o.displayedPages, o.pages))
            };
        },

        _appendItem: function (pageIndex, opts) {
            var self = this, options, $link, o = self.data('pagination'),
                $linkWrapper = $('<li class="page-item"></li>'), $ul = self.find('ul');
            pageIndex = pageIndex < 0 ? 0 : (pageIndex < o.pages ? pageIndex : o.pages - 1);

            options = {
                text: pageIndex + 1,
                classes: ''
            };

            if (o.labelMap.length && o.labelMap[pageIndex]) {
                options.text = o.labelMap[pageIndex];
            }

            options = $.extend(options, opts || {});

            if (pageIndex === o.currentPage || o.disabled) {
                if (o.disabled) {
                    $linkWrapper.addClass('disabled');
                } else if (options.classes !== "prev" && options.classes !== "next"){
                    $linkWrapper.addClass('active');
                }
                $link = $('<span class="page-link">' + (options.text) + '</span>');
            } else {

                $link = $('<span class="page-link">' + (options.text) + '</span>');

                $link.click(function (event) {
                    return methods._selectPage.call(self, pageIndex, event);
                });
            }

            if (options.classes) {
                $link.addClass(options.classes);
            }

            $linkWrapper.append($link);

            if ($ul.length) {
                $ul.append($linkWrapper);
            } else {
                self.append($linkWrapper);
            }
        },

        _selectPage: function (pageIndex, event) {
            var o = this.data('pagination');
            o.currentPage = pageIndex;
            if (o.selectOnClick) {
                methods._draw.call(this);
            }

            pageurl(pageIndex + 1);
            return o.onPageClick(pageIndex + 1, event);
        }

    };

    $.fn.pagination = function (method) {

        // Method calling logic
        if (methods[method] && method.charAt(0) !== '_') {
            return methods[method].apply(this, Array.prototype.slice.call(arguments, 1));
        } else if (typeof method === 'object' || !method) {
            return methods.init.apply(this, arguments);
        } else {
            $.error('Method ' + method + ' does not exist on jQuery.pagination');
        }

    };

})(jQuery);


/* www.jq22.com */
