/* global CloudCmd, Util, DOM, CloudFunc */

'use strict';

CloudCmd.Menu = MenuProto;

function MenuProto(position) {
    const config = CloudCmd.config;
    const Buffer = DOM.Buffer;
    const Info = DOM.CurrentInfo;
    
    let Loading             = true,
        Key                 = CloudCmd.Key,
        Events              = DOM.Events,
        Dialog              = DOM.Dialog,
        Images              = DOM.Images,
        Menu                = this,
        TITLE               = 'Menu',
        
        MenuShowedName,
        MenuContext,
        MenuContextFile;
    
    this.ENABLED                    = false;
    
    function init() {
        Loading  = true;
        Menu.show();
        
        Events.addKey(listener);
    }
    
    this.hide   = function() {
        MenuContext.hide();
        MenuContextFile.hide();
    };
    
    this.show   = function(position) {
        var x, y,
            showFunc;
            
        if (position) {
            x   = position.x;
            y   = position.y;
        }
        
        showFunc    = function() {
            show(x, y);
            Images.hide();
        };
        
        Util.exec.if(window.MenuIO, showFunc, () => {
            DOM.loadMenu((error) => {
                if (error)
                    return Dialog.alert(TITLE, error);
                
                showFunc();
            });
        });
    };
    
    function show(x, y) {
        var pos;
        
        if (!x || !y) {
            if (position) {
                x = position.x;
                y = position.y;
            } else {
                pos = getCurrentPosition();
                
                x = pos.x;
                y = pos.y;
            }
        }
        
        if (!Loading) {
            MenuContext.show(x, y);
            MenuContextFile.show(x, y);
            return;
        }
        
        loadFileMenuData((isAuth, menuDataFile) => {
            const NOT_FILE = true;
            const fm = DOM.getFM();
            const menuData = getMenuData(isAuth);
            const options = getOptions(NOT_FILE);
            const optionsFile = getOptions();
            const MenuIO = window.MenuIO;
            
            MenuContext = new MenuIO(fm, options, menuData);
            MenuContextFile = new MenuIO(fm, optionsFile, menuDataFile);
            
            const is = DOM.getCurrentByPosition({x, y});
            const menu = is ? MenuContextFile : MenuContext;
            
            menu.show(x, y);
            
            Loading = false;
            position = null;
        });
    }
    
    function getOptions(notFile) {
        var name, func, options;
        
        if (notFile) {
            name    = 'context';
            func    = Key.unsetBind;
        } else {
            name    = 'contextFile';
        }
        
        options     = {
            icon        : true,
            beforeClose : Key.setBind,
            beforeShow  : Util.exec.with(beforeShow, func),
            beforeClick : beforeClick,
            name        : name,
        };
        
        return options;
    }
    
    function getMenuData(isAuth) {
        var menu = {
            'Paste'         : Buffer.paste,
            'New'           : {
                'File'             : DOM.promptNewFile,
                'Directory'        : DOM.promptNewDir
            },
            'Upload'        : function() {
                CloudCmd.Upload.show();
            },
            'Upload From Cloud': uploadFromCloud,
            '(Un)Select All': DOM.toggleAllSelectedFiles
        };
        
        if (isAuth)
            menu['Log Out'] = CloudCmd.logOut;
        
        return menu;
    }
    
    function curry(fn) {
        var args = [].slice.call(arguments, 1);
        
        return function() {
            fn.apply(null, args.concat(arguments));
        };
    }
    
    function loadFileMenuData(callback) {
        var is = CloudCmd.config('auth');
        var show        = function(name) {
                CloudCmd[name].show();
            },
            Dialog      = DOM.Dialog,
            menuData    = getMenuData(is),
            menu        = {
                'View'          : curry(show, 'View'),
                'Edit'          : curry(show, 'Edit'),
                'Rename'        : function() {
                    setTimeout(DOM.renameCurrent, 100);
                },
                'Delete'        : function() {
                    CloudCmd.Operation.show('delete');
                },
                'Pack'          : function() {
                    CloudCmd.Operation.show('pack');
                },
                'Extract'       : function() {
                    CloudCmd.Operation.show('extract');
                },
                'Download'      : preDownload,
                'Upload To Cloud': curry(uploadTo, 'Cloud'),
                'Cut'           : function() {
                    isCurrent(Buffer.cut, function() {
                        Dialog.alert.noFiles(TITLE);
                    });
                },
                'Copy'          : function() {
                    isCurrent(Buffer.copy, function() {
                        Dialog.alert.noFiles(TITLE);
                    });
                },
            };
        
        Util.copyObj(menu, menuData);
        
        callback(is, menu);
    }
    
    function isCurrent(yesFn, noFn) {
        if (Info.name !== '..')
            yesFn();
        else
            noFn();
    }
    
    function isPath(x, y) {
        var el, elements, is,
            panel       = Info.panel;
        
        if (panel) {
            el          = document.elementFromPoint(x, y),
            elements    = panel.querySelectorAll('[data-name="js-path"] *'),
            is          = ~[].indexOf.call(elements, el);
        }
        
        return is;
    }
    
    function beforeShow(callback, params) {
        var name    = params.name,
            notShow = DOM.getCurrentByPosition({
                x: params.x,
                y: params.y
            });
        
        if (params.name === 'contextFile') {
            notShow   = !notShow;
        }
        
        if (!notShow)
            MenuShowedName = name;
        
        Util.exec(callback);
        
        if (!notShow)
            notShow = isPath(params.x, params.y);
        
        return notShow;
    }
    
    function beforeClick(name) {
        var notCall;
        
        if (MenuShowedName !== name)
            notCall = true;
        
        return notCall;
    }
    
    function uploadTo(nameModule) {
        Info.getData(function(error, data) {
            var name        = Info.name,
                execFrom    = CloudCmd.execFromModule;
             
            execFrom(nameModule, 'uploadFile', name, data);
        });
        
        CloudCmd.log('Uploading to ' + name + '...');
    }
    
    function uploadFromCloud() {
        Images.show.load('top');
        
        CloudCmd.execFromModule('Cloud', 'saveFile', function(name, data) {
            var path = DOM.getCurrentDirPath() + name;
            
            DOM.RESTful.write(path,  data, function(error) {
                !error && CloudCmd.refresh();
            });
        });
    }
    
    function preDownload() {
        download(config('packer'));
    }
    
    function download(type) {
        var TIME        = 30 * 1000,
            prefixUr    = CloudCmd.PREFIX_URL,
            FS          = CloudFunc.FS,
            PACK        = '/pack',
            date        = Date.now(),
            files       = DOM.getActiveFiles();
        
        if (!files.length)
            DOM.Dialog.alert.noFiles(TITLE);
        else
            files.forEach(function(file) {
                var element,
                    selected    = DOM.isSelected(file),
                    path        = DOM.getCurrentPath(file),
                    id          = DOM.load.getIdBySrc(path),
                    isDir       = DOM.isCurrentIsDir(file);
                
                CloudCmd.log('downloading file ' + path + '...');
                
                 /*
                  * if we send ajax request -
                  * no need in hash so we escape #
                  * and all other characters, like "%"
                  */
                path = path.replace(/#/g, '%23');
                path = encodeURI(path);
                
                if (isDir)
                    path        = prefixUr + PACK + path + DOM.getPackerExt(type);
                else
                    path        = prefixUr + FS + path + '?download';
                
                element     = DOM.load({
                    id          : id + '-' + date,
                    name        : 'iframe',
                    async       : false,
                    className   : 'hidden',
                    src         : path
                });
                
                setTimeout(function() {
                    document.body.removeChild(element);
                }, TIME);
                
                if (selected)
                    DOM.toggleSelectedFile(file);
            });
    }
    
    function getCurrentPosition() {
        var current     = Info.element,
            rect        = current.getBoundingClientRect();
        position    = {
            x: rect.left + rect.width / 3,
            y: rect.top
        };
        
        return position;
    }
    
    function listener(event) {
        var position,
            F9          = Key.F9,
            ESC         = Key.ESC,
            key         = event.keyCode,
            isBind      = Key.isBind();
        
        if (isBind && key === F9) {
            position = getCurrentPosition();
            MenuContext.show(position.x, position.y);
            
            event.preventDefault();
        }  else if (key === ESC) {
            Menu.hide();
        }
    }
    
    init();
}