(function (root, factory) {
    if (typeof define === 'function' && define.amd) {
        // AMD. Register as an anonymous module unless amdModuleId is set
        define('simple-hotkeys', ["jquery", "simple-module"], function ($, SimpleModule) {
            return (root['hotkeys'] = factory($, SimpleModule));
        });
    } else if (typeof exports === 'object') {
        // Node. Does not work with strict CommonJS, but
        // only CommonJS-like environments that support module.exports,
        // like Node.
        module.exports = factory(require("jquery"), require("simple-module"));
    } else {
        root.simple = root.simple || {};
        root.simple['hotkeys'] = factory(jQuery, SimpleModule);
    }
}(this, function ($, SimpleModule) {

    var Hotkeys, hotkeys,
        extend = function (child, parent) {
            for (var key in parent) {
                if (hasProp.call(parent, key)) child[key] = parent[key];
            }

            function ctor() {
                this.constructor = child;
            }

            ctor.prototype = parent.prototype;
            child.prototype = new ctor();
            child.__super__ = parent.prototype;
            return child;
        },
        hasProp = {}.hasOwnProperty;

    Hotkeys = (function (superClass) {
        extend(Hotkeys, superClass);

        function Hotkeys() {
            return Hotkeys.__super__.constructor.apply(this, arguments);
        }

        Hotkeys.count = 0;

        Hotkeys.keyNameMap = {
            8: "Backspace",
            9: "Tab",
            13: "Enter",
            16: "Shift",
            17: "Control",
            18: "Alt",
            19: "Pause",
            20: "CapsLock",
            27: "Esc",
            32: "Spacebar",
            33: "PageUp",
            34: "PageDown",
            35: "End",
            36: "Home",
            37: "Left",
            38: "Up",
            39: "Right",
            40: "Down",
            45: "Insert",
            46: "Del",
            91: "Meta",
            93: "Meta",
            48: "0",
            49: "1",
            50: "2",
            51: "3",
            52: "4",
            53: "5",
            54: "6",
            55: "7",
            56: "8",
            57: "9",
            65: "A",
            66: "B",
            67: "C",
            68: "D",
            69: "E",
            70: "F",
            71: "G",
            72: "H",
            73: "I",
            74: "J",
            75: "K",
            76: "L",
            77: "M",
            78: "N",
            79: "O",
            80: "P",
            81: "Q",
            82: "R",
            83: "S",
            84: "T",
            85: "U",
            86: "V",
            87: "W",
            88: "X",
            89: "Y",
            90: "Z",
            96: "0",
            97: "1",
            98: "2",
            99: "3",
            100: "4",
            101: "5",
            102: "6",
            103: "7",
            104: "8",
            105: "9",
            106: "Multiply",
            107: "Add",
            109: "Subtract",
            110: "Decimal",
            111: "Divide",
            112: "F1",
            113: "F2",
            114: "F3",
            115: "F4",
            116: "F5",
            117: "F6",
            118: "F7",
            119: "F8",
            120: "F9",
            121: "F10",
            122: "F11",
            123: "F12",
            124: "F13",
            125: "F14",
            126: "F15",
            127: "F16",
            128: "F17",
            129: "F18",
            130: "F19",
            131: "F20",
            132: "F21",
            133: "F22",
            134: "F23",
            135: "F24",
            59: ";",
            61: "=",
            186: ";",
            187: "=",
            188: ",",
            190: ".",
            191: "/",
            192: "`",
            219: "[",
            220: "\\",
            221: "]",
            222: "'"
        };

        Hotkeys.aliases = {
            "escape": "esc",
            "delete": "del",
            "return": "enter",
            "ctrl": "control",
            "space": "spacebar",
            "ins": "insert",
            "cmd": "meta",
            "command": "meta",
            "wins": "meta",
            "windows": "meta"
        };

        Hotkeys.normalize = function (shortcut) {
            var i, j, key, keyname, keys, len;
            keys = shortcut.toLowerCase().replace(/\s+/gi, "").split("+");
            for (i = j = 0, len = keys.length; j < len; i = ++j) {
                key = keys[i];
                keys[i] = this.aliases[key] || key;
            }
            keyname = keys.pop();
            keys.sort().push(keyname);
            return keys.join("_");
        };

        Hotkeys.prototype.opts = {
            el: document
        };

        Hotkeys.prototype._init = function () {
            this.id = ++this.constructor.count;
            this._map = {};
            this._delegate = typeof this.opts.el === "string" ? document : this.opts.el;
            return $(this._delegate).on("keydown.simple-hotkeys-" + this.id, this.opts.el, (function (_this) {
                return function (e) {
                    var ref;
                    return (ref = _this._getHander(e)) != null ? ref.call(_this, e) : void 0;
                };
            })(this));
        };

        Hotkeys.prototype._getHander = function (e) {
            var keyname, shortcut;
            if (!(keyname = this.constructor.keyNameMap[e.which])) {
                return;
            }
            shortcut = "";
            if (e.altKey) {
                shortcut += "alt_";
            }
            if (e.ctrlKey) {
                shortcut += "control_";
            }
            if (e.metaKey) {
                shortcut += "meta_";
            }
            if (e.shiftKey) {
                shortcut += "shift_";
            }
            shortcut += keyname.toLowerCase();
            return this._map[shortcut];
        };

        Hotkeys.prototype.respondTo = function (subject) {
            if (typeof subject === 'string') {
                return this._map[this.constructor.normalize(subject)] != null;
            } else {
                return this._getHander(subject) != null;
            }
        };

        Hotkeys.prototype.add = function (shortcut, handler) {
            this._map[this.constructor.normalize(shortcut)] = handler;
            return this;
        };

        Hotkeys.prototype.remove = function (shortcut) {
            delete this._map[this.constructor.normalize(shortcut)];
            return this;
        };

        Hotkeys.prototype.destroy = function () {
            $(this._delegate).off(".simple-hotkeys-" + this.id);
            this._map = {};
            return this;
        };

        return Hotkeys;

    })(SimpleModule);

    hotkeys = function (opts) {
        return new Hotkeys(opts);
    };

    return hotkeys;

}));