mindplot.Events = new Class({

    $events: {},

    _removeOn: function(string){
        return string.replace(/^on([A-Z])/, function(full, first){
            return first.toLowerCase();
        });
    },

    addEvent: function(type, fn, internal){
        type = this._removeOn(type);

        this.$events[type] = (this.$events[type] || []).include(fn);
        if (internal) fn.internal = true;
        return this;
    },

    addEvents: function(events){
        for (var type in events) this.addEvent(type, events[type]);
        return this;
    },

    fireEvent: function(type, args, delay){
        type = this._removeOn(type);
        var events = this.$events[type];
        if (!events) return this;
        args = Array.from(args);
        events.each(function(fn){
            if (delay) fn.delay(delay, this, args);
            else fn.apply(this, args);
        }, this);
        return this;
    },

    removeEvent: function(type, fn){
        type = this._removeOn(type);
        var events = this.$events[type];
        if (events && !fn.internal){
            var index =  events.indexOf(fn);
            if (index != -1) delete events[index];
        }
        return this;
    },

    removeEvents: function(events){
        var type;
        if (typeOf(events) == 'object'){
            for (type in events) this.removeEvent(type, events[type]);
            return this;
        }
        if (events) events = removeOn(events);
        for (type in this.$events){
            if (events && events != type) continue;
            var fns = this.$events[type];
            for (var i = fns.length; i--;) if (i in fns){
                this.removeEvent(type, fns[i]);
            }
        }
        return this;
    }

});