var CloudCommander, CloudFunc, $;
/* object contains viewer FancyBox
 * https://github.com/fancyapps/fancyBox
 */
CloudCommander.Viewer = {getByClass  : function(pClass){
        return document.getElementsByClassName(pClass);
    }};
CloudCommander.Viewer.FancyBox = {
    config: {
        beforeShow : (function(){
            CloudCommander.keyBinded = false;
        }),
        beforeClose: (function(){
            CloudCommander.keyBinded = true;
        }),
        helpers : {
            overlay : {
                opacity: 0.1,
                css : {
                    'background-color' : '#fff'
                }
            }
        },
        padding : 0
        },
    load: function(){
        var ljsLoad_f = function(){
                CloudCommander.jsload(
                    'http://fancyapps.com/fancybox/source/jquery.fancybox.pack.js');
        };
        
        CloudCommander.cssLoad({
            src  : 'http://fancyapps.com/fancybox/source/jquery.fancybox.css',
            func : ljsLoad_f
        });
    },
    set: function(){
        if(this.getByClass('fancybox').length)
            return;
        try{
            /* get current panel (left or right) */
            var lPanel = this.getByClass('current-file');

            lPanel.length &&
                (lPanel = lPanel[0].parentElement);
                
            /* get all file links */
            var lA = lPanel.getElementsByTagName('a');
            
            var lName;
            /* first two is not files nor folders*/
            for (var i=2; i < lA.length; i++) {
                lName = lA[i].title || lA[i].textContent;
                
                CloudFunc.checkExtension(lName,['png','jpg']) && 
                    (lA[i].className    = 'fancybox') &&
                    (lA[i].rel          = 'gallery');
            }
            
            $('.fancybox').fancybox(this.config);
        }catch(pError){
            console.log(pError);
        }
    },
    getById     : function(pId){return document.getElementById(pId);},
    getByClass  : function(pClass){
        return document.getElementsByClassName(pClass);
    }
};
CloudCommander.Viewer.Keys = (function(){
    "use strict";
    
    CloudCommander.Viewer.FancyBox.load();
    
    var key_event = function(pParent){
        return function(event){
            /* если клавиши можно обрабатывать */
            if(CloudCommander.keyBinded){
                /* if f4 pressed */
                if(event.keyCode===114){                    
                    CloudCommander.Viewer.FancyBox.set();
                    var lCurrent = pParent.getByClass('current-file');
                          lCurrent.length &&
                            (lCurrent = lCurrent[0]);
                    
                    var lA = lCurrent.getElementsByClassName('fancybox');
                                        
                    lA.length &&
                        $.fancybox.open({ href : lA[0].href },
                            pParent.FancyBox.config);
                
                event.preventDefault();
                }
            }
        };
    };
       
    /* добавляем обработчик клавишь */
    if (document.addEventListener)                
        document.addEventListener('keydown', key_event(this),false);
        
    else        
        document.onkeypress=key_event;    
});