/* --------------------------------------------------------------
 shortcuts.js 2015-09-23 gm
 Gambio GmbH
 http://www.gambio.de
 Copyright (c) 2015 Gambio GmbH
 Released under the GNU General Public License (Version 2)
 [http://www.gnu.org/licenses/gpl-2.0.html]
 --------------------------------------------------------------
 */

/**
 * ## Keyboard Shortcuts
 *
 * Allows to assign shortcuts for different actions.
 *
 * @module Compatibility/shortcuts
 */
gx.compatibility.module(
    // Module name
    'shortcuts',

    // Module dependencies
    [],

    /**  @lends module:Compatibility/shortcuts */

    function () {

        'use strict';

        // ------------------------------------------------------------------------
        // VARIABLES DEFINITION
        // ------------------------------------------------------------------------

        var keysPressed = [],
            module = {};

        // ------------------------------------------------------------------------
        // ELEMENTS DEFINITION
        // ------------------------------------------------------------------------

        var $adminSearchInput = $('input[name="admin_search"]'),
            $favoriteMenuItems = $('#BOX_HEADING_FAVORITES > li');

        // ------------------------------------------------------------------------
        // MAPS
        // ------------------------------------------------------------------------

        var keyMap = {

            ctrl: 17,
            shift: 16,

            f: 70,

            normal1: 49,
            normal2: 50,
            normal3: 51,
            normal4: 52,
            normal5: 53,
            normal6: 54,
            normal7: 55,
            normal8: 56,
            normal9: 57

        };

        var shortcutMap = {

            activateSearch: {
                shortcut: [keyMap.ctrl, keyMap.shift, keyMap.f],
                performAction: function () {
                    $adminSearchInput.trigger('click');
                }
            },

            openFavorite1: {
                shortcut: [keyMap.ctrl, keyMap.shift, keyMap.normal1],
                performAction: function () {
                    var $menuItem = $favoriteMenuItems.eq(0);
                    if ($menuItem.length) {
                        var link = $menuItem
                            .find('a')
                            .prop('href');
                        window.open(link, '_self');
                    }
                }
            },

            openFavorite2: {
                shortcut: [keyMap.ctrl, keyMap.shift, keyMap.normal2],
                performAction: function () {
                    var $menuItem = $favoriteMenuItems.eq(1);
                    if ($menuItem.length) {
                        var link = $menuItem
                            .find('a')
                            .prop('href');
                        window.open(link, '_self');
                    }
                }
            },

            openFavorite3: {
                shortcut: [keyMap.ctrl, keyMap.shift, keyMap.normal3],
                performAction: function () {
                    var $menuItem = $favoriteMenuItems.eq(2);
                    if ($menuItem.length) {
                        var link = $menuItem
                            .find('a')
                            .prop('href');
                        window.open(link, '_self');
                    }
                }
            },

            openFavorite4: {
                shortcut: [keyMap.ctrl, keyMap.shift, keyMap.normal4],
                performAction: function () {
                    var $menuItem = $favoriteMenuItems.eq(3);
                    if ($menuItem.length) {
                        var link = $menuItem
                            .find('a')
                            .prop('href');
                        window.open(link, '_self');
                    }
                }
            },

            openFavorite5: {
                shortcut: [keyMap.ctrl, keyMap.shift, keyMap.normal5],
                performAction: function () {
                    var $menuItem = $favoriteMenuItems.eq(4);
                    if ($menuItem.length) {
                        var link = $menuItem
                            .find('a')
                            .prop('href');
                        window.open(link, '_self');
                    }
                }
            },

            openFavorite6: {
                shortcut: [keyMap.ctrl, keyMap.shift, keyMap.normal6],
                performAction: function () {
                    var $menuItem = $favoriteMenuItems.eq(5);
                    if ($menuItem.length) {
                        var link = $menuItem
                            .find('a')
                            .prop('href');
                        window.open(link, '_self');
                    }
                }
            },

            openFavorite7: {
                shortcut: [keyMap.ctrl, keyMap.shift, keyMap.normal7],
                performAction: function () {
                    var $menuItem = $favoriteMenuItems.eq(6);
                    if ($menuItem.length) {
                        var link = $menuItem
                            .find('a')
                            .prop('href');
                        window.open(link, '_self');
                    }
                }
            },

            openFavorite8: {
                shortcut: [keyMap.ctrl, keyMap.shift, keyMap.normal8],
                performAction: function () {
                    var $menuItem = $favoriteMenuItems.eq(7);
                    if ($menuItem.length) {
                        var link = $menuItem
                            .find('a')
                            .prop('href');
                        window.open(link, '_self');
                    }
                }
            },

            openFavorite9: {
                shortcut: [keyMap.ctrl, keyMap.shift, keyMap.normal9],
                performAction: function () {
                    var $menuItem = $favoriteMenuItems.eq(8);
                    if ($menuItem.length) {
                        var link = $menuItem
                            .find('a')
                            .prop('href');
                        window.open(link, '_self');
                    }
                }
            },

        };

        // ------------------------------------------------------------------------
        // METHODS
        // ------------------------------------------------------------------------

        var _checkArrayEquality = function (a, b) {
            if (a === b) {
                return true;
            }
            if (a == null || b === null) {
                return false;
            }
            if (a.length !== b.length) {
                return false;
            }

            for (var i = 0; i < a.length; ++i) {
                if (a[i] !== b[i]) {
                    return false;
                }
            }

            return true;
        };

        var _checkShortcut = function (keysPressed) {
            for (var map in shortcutMap) {
                if (shortcutMap.hasOwnProperty(map) &&
                    _checkArrayEquality(shortcutMap[map].shortcut, keysPressed)
                ) {
                    shortcutMap[map].performAction();
                }
            }
        };

        // ------------------------------------------------------------------------
        // EVENT HANDLER
        // ------------------------------------------------------------------------

        var _initialize = function () {
            $(document).on('keyup', function () {
                setTimeout(function () {
                    _checkShortcut(keysPressed);
                    keysPressed = [];
                }, 100);
            });

            $(document).on('keydown', function (event) {
                keysPressed.push(event.which);
            });
        };

        // ------------------------------------------------------------------------
        // INITIALIZATION
        // ------------------------------------------------------------------------

        module.init = function (done) {
            _initialize();
            done();
        };

        return module;
    });