var CloudCommander, $;
/* object contains jQuery-contextMenu
 * https://github.com/medialize/jQuery-contextMenu
 */
CloudCommander.Menu              = new CloudCommander.Util();

CloudCommander.Menu.dir          = './lib/client/menu/';


    
/* function return configureation
 * for menu
 */
CloudCommander.Menu.getConfig    = (function(){
    var lThis = this;
    return{
        // define which elements trigger this menu
        selector: 'li',
        // define the elements of the menu
        items: {
            view: {name: 'View', callback: function(key, opt){
                if(typeof CloudCommander.Viewer === 'function')
                    CloudCommander.Viewer();
                else{
                    var lViewer = CloudCommander.Viewer.get();
                    if(lViewer && lViewer.show)
                        lViewer.show();
                }
            }},
            
            edit: {name: 'Edit', callback: function(key, opt){
                lThis.Images.showLoad();
                
                if(typeof CloudCommander.Editor === 'function')
                    CloudCommander.Editor();
                else{                    
                    var lEditor = CloudCommander.Editor.get();
                    if(lEditor && lEditor.show)
                        lEditor.show();
                }
                
            }},
            
            'delete': {name: 'Delete',
                callback: function(key, opt){
                    console.log('delete menu item choosen');
            }}
        }
    };
});

/* function loads css and js of Menu
 * @pParent     - this
 * @pPosition   -  position of menu
 */
CloudCommander.Menu.load         = (function(pParent, pPosition){
    return function(){
        var ljsLoad_f = function(){
            var lUISrc      = pParent.dir + 'jquery.ui.position.js';
            var lMenuSrc    = pParent.dir + 'jquery.contextMenu.js';            
            
            pParent.jsload(lUISrc, function(){
                pParent.jsload(lMenuSrc, pParent.show(pParent, pPosition));
            });
        };
        
        var lSrc = pParent.dir +'jquery.contextMenu.css';
        
        pParent.cssLoad({
            src  : lSrc,
            func : {
                onload: ljsLoad_f            
            }   
        });
    }();
});

CloudCommander.Menu.set          = (function(){
    if(!this.seted){
        $.contextMenu(this.getConfig());        
        
        var lThis = this;

        var lFunc_f = document.onclick;
        /*
         * Menu works in some crazy way so need a
         * little hack to get every thing work out.
         * When menu shows up, it drawing invisible 
         * layer wich hides all elements of
         * Cloud Commander so it could not handle
         * onclick events. To get every thing work
         * how expected we hide out invisible layer
         * so for observer it is nothing special
         * is not going on. All magic happening in
         * DOM tree
         */
        document.onclick = function(pEvent){
            if(pEvent && pEvent.x && pEvent.y){
                if(lLayer){
                    var lLayer = lThis.getById('context-menu-layer');
                    var lStyle;
                    
                    if(lLayer)
                        lStyle = lLayer.style.cssText;
                    /* hide invisible menu layer */
                    if(lStyle)
                        lLayer.style.cssText = lStyle
                            .replace('z-index: 1', 'z-index:-1');
                    
                    /* get element by point */
                    var lElement = document.elementFromPoint(pEvent.x, pEvent.y);
                    var lTag = lElement.tagName;
                    var lParent;
    
                    if(lTag === 'A' || lTag === 'SPAN'){                
                        if (lElement.tagName === 'A')
                            lParent = lElement.parentElement.parentElement;
                        else if(lElement.tagName === 'SPAN')
                            lParent = lElement.parentElement;
                            
                        lThis.setCurrentFile(lParent);
                    }
                    
                    /* show invisible menu layer */
                    if(lLayer && lStyle)
                        lLayer.style.cssText = lStyle;
                    
                    /* if document.onclick was set up
                     * before us, it's best time to call it
                     */
                    if(typeof lFunc_f === 'function')
                        lFunc_f();
                }
            }
        };
        
        this.seted = true;
    }
});

CloudCommander.Menu.seted        = false;

/* function shows menu for the first time
 * right away after loading
 */
CloudCommander.Menu.show         = (function(pParent, pPosition){
    return function(){
        pParent.set();
        
        pParent.Images.hideLoad();
        
        if(pPosition && pPosition.x && pPosition.y)
            $('li').contextMenu(pPosition);            
        else
            $('li').contextMenu();
    };
});

/* key binding function */
CloudCommander.Menu.Keys                     = (function(pPosition){
    "use strict";
    
    var key_event = (function(){
        return function(event){
            /* если клавиши можно обрабатывать */
            if(CloudCommander.keyBinded)
                /* if shift + F10 pressed */
                if(event.keyCode === CloudCommander.KEY.F10 &&
                    event.shiftKey){
                    CloudCommander.Menu.show();
                
                event.preventDefault();                    
                }                
        };
    });
       
    /* добавляем обработчик клавишь */
    if (document.addEventListener)                
        document.addEventListener('keydown', key_event(),false);
        
    else{
        var lFunc;
        if(typeof document.onkeydown === 'function')
            lFunc = document.onkeydown;
        
        document.onkeydown = function(){
            if(lFunc)
                lFunc();
            
            key_event();
        };
        
        /* showing context menu preview*/        
        CloudCommander.Menu.show();        
    }
    
    CloudCommander.Menu.load(this, pPosition);
});