(function(){

    var MESSAGE_CHANNEL = "RingRingRingRingRingRingRingBananaPhone";
    var HOVER_ACTIVE_COLOR = {red: 255, green: 0, blue: 0};
    var HOVER_NOT_ACTIVE_COLOR = {red: 99, green: 99, blue:99};
    var ALLOWED_NUMBERS = ["0", "1", "5", "6"];
    
    var isActiveButton = false;
    var _entityID; 
    var name;

    var PhoneButton = function(){

    };
    PhoneButton.prototype = {
        preload: function(entityID){
            _entityID = entityID;
            name = Entities.getEntityProperties(entityID, 'name').name;
            if (ALLOWED_NUMBERS.indexOf(name) != -1) {
                isActiveButton = true;
                Messages.subscribe(MESSAGE_CHANNEL);                
            }

        },
        unload: function(){
            if (isActiveButton){
                Messages.unsubscribe(MESSAGE_CHANNEL);                
            }
        },
        hoverEnterEntity: function(id, event) {
            Entities.editEntity(id, {color: HOVER_ACTIVE_COLOR});
        },
        hoverLeaveEntity: function(id, event) {
            Entities.editEntity(id, {color: HOVER_NOT_ACTIVE_COLOR});
        },
        clickDownOnEntity: function() {
            if (isActiveButton) {
                Messages.sendMessage(MESSAGE_CHANNEL, name);
            }
        }
    };
    return new PhoneButton;
})