/* object contains jQuery-contextMenu
 * https://github.com/medialize/jQuery-contextMenu
 */
var CloudCommander, Util, DOM, CloudFunc, $;
(function(CloudCmd, Util, DOM, CloudFunc){
    'use strict';
    
    var KeyBinding                  = CloudCmd.KeyBinding,
        MenuSeted                   = false,
        Menu                        = {},
        Position,
        UploadToItemNames;
    
    Menu.dir                        = '/lib/client/menu/';
    
    /* enable and disable menu constant */
    Menu.ENABLED                    = false;
    
    /* PRIVATE FUNCTIONS */
    
    /** function shows editor
     * @param pReadOnly
     */
    function showEditor(pReadOnly){
        DOM.Images.showLoad();
        var lEditor = CloudCmd[pReadOnly ? 'Viewer' : 'Editor'],
            lResult = Util.exec(lEditor, pReadOnly);
        
        if(!lResult){
            lEditor = lEditor.get();
            if(lEditor)
                Util.exec(lEditor.show);
        }
    }
    
    /* function read data from modules.json 
     * and build array of menu items of "upload to"
     * menu
     */
    function setUploadToItemNames(pCallBack){
        CloudCmd.getModules(function(pModules){
            var lStorageObj         = Util.findObjByNameInArr( pModules, 'storage' );
                UploadToItemNames   = Util.getNamesFromObjArray( lStorageObj ) || [];
            
            Util.exec(pCallBack);
        });
    }
    
    /** 
     * function get menu item object for Upload To
     */
    function getUploadToItems(pObjectName){
        var lObj        = {};
        if( Util.isArray(pObjectName) ){
            
            var n = pObjectName.length;
            for(var i = 0; i < n; i++){
                var lStr = pObjectName[i];
                lObj[lStr] =  getUploadToItems( lStr );
            }
        }
        else if( Util.isString(pObjectName) ){
            lObj.name       = pObjectName;
             
            lObj.callback   = function(key, opt){
                DOM.getCurrentData(function(pParams){
                    var lObject     = CloudCmd[pObjectName];
                    
                    Util.ifExec('init' in lObject,
                        function(){
                            CloudCmd[pObjectName].uploadFile(pParams);
                        },
                        
                        function(pCallBack){
                            Util.exec(lObject, pCallBack);
                        });
                });
            
                Util.log('Uploading to ' + pObjectName+ '...');
            };
        }
        
        return lObj;
    }
       
    /**
     * get menu item
     */
    function getItem(pName, pCallBack){
        var lRet = {
            name : pName
        };
        
        if(Util.isFunction(pCallBack) )
            lRet.callback    = pCallBack;
        
        else if (Util.isObject(pCallBack))
            lRet.items       = pCallBack;
        
        return lRet;
    }
    
    /**
     * get all menu items
     * pItems = [{pName, pFunc}]
     */
     function getAllItems(pItems){
        var lRet = {},
            lName,
            lFunc;
        
        if(pItems)
            for(lName in pItems){
                lFunc       = pItems[lName];
                lRet[lName] = getItem(lName, lFunc);
            }
        
        return lRet;
     }
    
    /**
     * download menu item callback
     */
    function downloadFromMenu(key, opt){
        DOM.Images.showLoad();
        
        var lPath   = DOM.getCurrentPath(),
            lId     = DOM.getIdBySrc(lPath);
        
        Util.log('downloading file ' + lPath +'...');
        
        lPath = CloudFunc.FS + lPath + '?download';
        
        if(!DOM.getById(lId)){
            var lDownload = DOM.anyload({
                name        : 'iframe',
                async       : false,
                className   : 'hidden',
                src         : lPath,
                func        : Util.retFunc(DOM.Images.hideLoad)
            });
            
            DOM.Images.hideLoad();
            setTimeout(function() {
                document.body.removeChild(lDownload);
            }, 10000);
        }
        else
            DOM.Images.showError({
                responseText: 'Error: You trying to' + 
                    'download same file to often'});
    }
    
    /** 
     * function return configureation for menu
     */
    function getConfig (){
        var lRet,
            lMenuItems = {
                'View'      : Util.retExec(showEditor, true),
                'Edit'      : Util.retExec(showEditor, false),
                'Rename'    : function(){
                    setTimeout( Util.retExec(DOM.renameCurrentFile), 100);
                },
                'Delete'    : Util.retExec(DOM.promptDeleteCurrent),
            };
        
        if(UploadToItemNames.length)
            lMenuItems['Upload to'] = getUploadToItems(UploadToItemNames);
        
        lMenuItems.Download = Util.retExec(downloadFromMenu);
        
        lRet = {
            // define which elements trigger this menu
            selector: 'li',
            
            callback: function(key, options) {
                var m = "clicked: " + key;
                Util.log(m, options);
                
                KeyBinding.set();
            },
            
            // define the elements of the menu
            items   : getAllItems(lMenuItems),
            events  :{
                hide: clickProcessing
            }
        };
        
        return lRet;
    }
    
    /** function loads css and js of Menu
     * @param pCallBack
     */
    function load(pCallBack){
        console.time('menu load');
        
        var lDir    = Menu.dir,
            lFiles  = [
                lDir + 'contextMenu.js',
                lDir + 'contextMenu.css'
            ];
        
        DOM.anyLoadInParallel(lFiles, function(){
            console.timeEnd('menu load');
            $.contextMenu.handle.keyStop = $.noop;
            Util.exec(pCallBack);
        });
    }
    
    /*
     * Menu works in some crazy way so need a
     * little hack to get every thing work out.
     * When menu shows up, it draws invisible 
     * layer wich hides all elements of
     * Cloud Commander so it could not handle
     * onclick events. To get every thing work
     * how expected we remove invisible layer
     * so for observer it is nothing special
     * is not going on. All magic happening in
     * DOM tree.
     */
    function clickProcessing(){
        var lLayer = DOM.getById('context-menu-layer');
        if(lLayer){
            document.body.removeChild(lLayer);
            
            var lElement    = document.elementFromPoint(Position.x, Position.y),
                lTag        = lElement.tagName;
            
            if(lTag === 'A' || lTag === 'SPAN'){
                if (lElement.tagName === 'A')
                    lElement = lElement.parentElement.parentElement;
                else if(lElement.tagName === 'SPAN')
                    lElement = lElement.parentElement;
                    
                if(lElement.className === '')
                    DOM.setCurrentFile(lElement);
            }
            
            KeyBinding.set();
        }
    }
    
    
    function set(){
        if(!MenuSeted){
            $.contextMenu(getConfig());
            MenuSeted = true;
            //DOM.addListener('mousedown', clickProcessing);
            DOM.addListener('mousemove', function(pEvent){
                Position = {
                    x : pEvent.clientX,
                    y : pEvent.clientY
                };
            });
        }
    }
    
    
    /** function shows menu for the first time
     * right away after loading
     */
    Menu.show        = function(){
        set();
        DOM.Images.hideLoad();
        
        if(Position && !Position.x )
            Position = undefined;
        
        $('li').contextMenu(Position);
    };
    
    /* key binding function */
    Menu.init        = function(pPosition){
        Position = pPosition;
        
        Util.loadOnLoad([
            Menu.show,
            setUploadToItemNames,
            load,
            DOM.jqueryLoad
        ]);
        
        var key_event = function(pEvent){
            var lKEY        = CloudCmd.KEY,
                lKeyCode    = pEvent.keyCode;
            /* если клавиши можно обрабатывать */
            if( KeyBinding.get() ){
                /* if shift + F10 pressed */
                if(lKeyCode === lKEY.F10 && pEvent.shiftKey){
                    $( DOM.getCurrentFile() ).contextMenu();
                    DOM.preventDefault(pEvent);
                }
            }
            else if (lKeyCode === lKEY.ESC)
                KeyBinding.set();
        };
           
        /* добавляем обработчик клавишь */
        DOM.addKeyListener( key_event );
    };
    
    CloudCmd.Menu                   = Menu;
})(CloudCommander, Util, DOM, CloudFunc);