/*
This file is part of Ext JS 3.4

Copyright (c) 2011-2013 Sencha Inc

Contact:  http://www.sencha.com/contact

GNU General Public License Usage
This file may be used under the terms of the GNU General Public License version 3.0 as
published by the Free Software Foundation and appearing in the file LICENSE included in the
packaging of this file.

Please review the following information to ensure the GNU General Public License version 3.0
requirements will be met: http://www.gnu.org/copyleft/gpl.html.

If you are unsure which license is appropriate for your use, please contact the sales department
at http://www.sencha.com/contact.

Build date: 2013-04-03 15:07:25
*/
Ext.ns('Ext.ux.tree');

/**
 * @class Ext.ux.tree.TreeGridSorter
 * @extends Ext.tree.TreeSorter
 * Provides sorting of nodes in a {@link Ext.ux.tree.TreeGrid}.  The TreeGridSorter automatically monitors events on the
 * associated TreeGrid that might affect the tree's sort order (beforechildrenrendered, append, insert and textchange).
 * Example usage:<br />
 * <pre><code>
 new Ext.ux.tree.TreeGridSorter(myTreeGrid, {
     folderSort: true,
     dir: "desc",
     sortType: function(node) {
         // sort by a custom, typed attribute:
         return parseInt(node.id, 10);
     }
 });
 </code></pre>
 * @constructor
 * @param {TreeGrid} tree
 * @param {Object} config
 */
Ext.ux.tree.TreeGridSorter = Ext.extend(Ext.tree.TreeSorter, {
    /**
     * @cfg {Array} sortClasses The CSS classes applied to a header when it is sorted. (defaults to <tt>['sort-asc', 'sort-desc']</tt>)
     */
    sortClasses : ['sort-asc', 'sort-desc'],
    /**
     * @cfg {String} sortAscText The text displayed in the 'Sort Ascending' menu item (defaults to <tt>'Sort Ascending'</tt>)
     */
    sortAscText : 'Sort Ascending',
    /**
     * @cfg {String} sortDescText The text displayed in the 'Sort Descending' menu item (defaults to <tt>'Sort Descending'</tt>)
     */
    sortDescText : 'Sort Descending',

    constructor : function(tree, config) {
        if(!Ext.isObject(config)) {
            config = {
                property: tree.columns[0].dataIndex || 'text',
                folderSort: true
            }
        }

        Ext.ux.tree.TreeGridSorter.superclass.constructor.apply(this, arguments);

        this.tree = tree;
        tree.on('headerclick', this.onHeaderClick, this);
        tree.ddAppendOnly = true;

        var me = this;
        this.defaultSortFn = function(n1, n2){

            var desc = me.dir && me.dir.toLowerCase() == 'desc',
                prop = me.property || 'text',
                sortType = me.sortType,
                caseSensitive = me.caseSensitive === true,
                leafAttr = me.leafAttr || 'leaf',
                attr1 = n1.attributes,
                attr2 = n2.attributes;

            if(me.folderSort){
                if(attr1[leafAttr] && !attr2[leafAttr]){
                    return 1;
                }
                if(!attr1[leafAttr] && attr2[leafAttr]){
                    return -1;
                }
            }
            var prop1 = attr1[prop],
                prop2 = attr2[prop],
                v1 = sortType ? sortType(prop1) : (caseSensitive ? prop1 : prop1.toUpperCase());
                v2 = sortType ? sortType(prop2) : (caseSensitive ? prop2 : prop2.toUpperCase());
                
            if(v1 < v2){
                return desc ? +1 : -1;
            }else if(v1 > v2){
                return desc ? -1 : +1;
            }else{
                return 0;
            }
        };

        tree.on('afterrender', this.onAfterTreeRender, this, {single: true});
        tree.on('headermenuclick', this.onHeaderMenuClick, this);
    },

    onAfterTreeRender : function() {
        if(this.tree.hmenu){
            this.tree.hmenu.insert(0,
                {itemId:'asc', text: this.sortAscText, cls: 'xg-hmenu-sort-asc'},
                {itemId:'desc', text: this.sortDescText, cls: 'xg-hmenu-sort-desc'}
            );
        }
        this.updateSortIcon(0, 'asc');
    },

    onHeaderMenuClick : function(c, id, index) {
        if(id === 'asc' || id === 'desc') {
            this.onHeaderClick(c, null, index);
            return false;
        }
    },

    onHeaderClick : function(c, el, i) {
        if(c && !this.tree.headersDisabled){
            var me = this;

            me.property = c.dataIndex;
            me.dir = c.dir = (c.dir === 'desc' ? 'asc' : 'desc');
            me.sortType = c.sortType;
            me.caseSensitive === Ext.isBoolean(c.caseSensitive) ? c.caseSensitive : this.caseSensitive;
            me.sortFn = c.sortFn || this.defaultSortFn;

            this.tree.root.cascade(function(n) {
                if(!n.isLeaf()) {
                    me.updateSort(me.tree, n);
                }
            });

            this.updateSortIcon(i, c.dir);
        }
    },

    // private
    updateSortIcon : function(col, dir){
        var sc = this.sortClasses,
            hds = this.tree.innerHd.select('td').removeClass(sc);
        hds.item(col).addClass(sc[dir == 'desc' ? 1 : 0]);
    }
});