/*! UIkit 2.27.2 | www.getuikit.com | © 2014 YOOtheme | MIT License */ /*

* Based on simplePagination - Copyright (c) 2012 Flavius Matis - http://flaviusmatis.github.com/simplePagination.js/ (MIT)
*/

(function(addon) {

var component;

if (window.UIkit) {
    component = addon(UIkit);
}

if (typeof define == 'function' && define.amd) {
    define('uikit-pagination', ['uikit'], function(){
        return component || addon(UIkit);
    });
}

})(function(UI){

"use strict";

UI.component('pagination', {

    defaults: {
        items          : 1,
        itemsOnPage    : 1,
        pages          : 0,
        displayedPages : 7,
        edges          : 1,
        currentPage    : 0,
        lblPrev        : false,
        lblNext        : false,
        onSelectPage   : function() {}
    },

    boot: function() {

        // init code
        UI.ready(function(context) {

            UI.$('[data-uk-pagination]', context).each(function(){
                var ele = UI.$(this);

                if (!ele.data('pagination')) {
                    UI.pagination(ele, UI.Utils.options(ele.attr('data-uk-pagination')));
                }
            });
        });
    },

    init: function() {

        var $this = this;

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

        this.on('click', 'a[data-page]', function(e){
            e.preventDefault();
            $this.selectPage(UI.$(this).data('page'));
        });

        this._render();
    },

    _getInterval: function() {

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

    render: function(pages) {
        this.pages = pages ? pages : this.pages;
        this._render();
    },

    selectPage: function(pageIndex, pages) {
        this.currentPage = pageIndex;
        this.render(pages);

        this.options.onSelectPage.apply(this, [pageIndex]);
        this.trigger('select.uk.pagination', [pageIndex, this]);
    },

    _render: function() {

        var o = this.options, interval = this._getInterval(), i;

        this.element.empty();

        // Generate Prev link
        if (o.lblPrev) this._append(this.currentPage - 1, {text: o.lblPrev});

        // Generate start edges
        if (interval.start > 0 && o.edges > 0) {

            var end = Math.min(o.edges, interval.start);

            for (i = 0; i < end; i++) this._append(i);

            if (o.edges < interval.start && (interval.start - o.edges != 1)) {
                this.element.append('<li><span>...</span></li>');
            } else if (interval.start - o.edges == 1) {
                this._append(o.edges);
            }
        }

        // Generate interval links
        for (i = interval.start; i < interval.end; i++) this._append(i);

        // Generate end edges
        if (interval.end < this.pages && o.edges > 0) {

            if (this.pages - o.edges > interval.end && (this.pages - o.edges - interval.end != 1)) {
                this.element.append('<li><span>...</span></li>');
            } else if (this.pages - o.edges - interval.end == 1) {
                this._append(interval.end++);
            }

            var begin = Math.max(this.pages - o.edges, interval.end);

            for (i = begin; i < this.pages; i++) this._append(i);
        }

        // Generate Next link (unless option is set for at front)
        if (o.lblNext) this._append(this.currentPage + 1, {text: o.lblNext});
    },

    _append: function(pageIndex, opts) {

        var item, options;

        pageIndex = pageIndex < 0 ? 0 : (pageIndex < this.pages ? pageIndex : this.pages - 1);
        options   = UI.$.extend({ text: pageIndex + 1 }, opts);

        item = (pageIndex == this.currentPage) ? '<li class="uk-active"><span>' + (options.text) + '</span></li>' : '<li><a href="#page-'+(pageIndex+1)+'" data-page="'+pageIndex+'">'+options.text+'</a></li>';

        this.element.append(item);
    }
});

return UI.pagination;

});