(function(){ 
    var teleport;
    var portalDestination;
    var animationURL;
    var position;
    var rotation;

    function isPositionInsideBox(position, boxProperties) {
        var localPosition = Vec3.multiplyQbyV(Quat.inverse(boxProperties.rotation),
            Vec3.subtract(MyAvatar.position, boxProperties.position));
        var halfDimensions = Vec3.multiply(boxProperties.dimensions, 0.5);
        return -halfDimensions.x <= localPosition.x &&
                halfDimensions.x >= localPosition.x &&
               -halfDimensions.y <= localPosition.y &&
                halfDimensions.y >= localPosition.y &&
               -halfDimensions.z <= localPosition.z &&
                halfDimensions.z >= localPosition.z;
    }

    function playSound(entityID) {
        print("playing teleport sound");
        if (teleport.downloaded) {
            if (!position) {
                getProps(entityID);
            }
            Audio.playSound(teleport, { position: position, volume: 0.40, localOnly: true });
        }
    }

    function getProps(entityID) {
        var properties = Entities.getEntityProperties(entityID);
        if (properties) {
            animationURL = properties.modelURL;
            position = properties.position;
            portalDestination = properties.userData;
            rotation = properties.rotation;
        }
    }

    function attemptTeleportation() {
        if (portalDestination.length > 0) {
            print("Teleporting to hifi://" + portalDestination);
            Window.location = "hifi://" + portalDestination;
        }
    }
    
    this.preload = function(entityID) {
        print("loading teleport script");
        teleport = SoundCache.getSound("http://s3.amazonaws.com/hifi-public/birarda/teleport.raw");
        getProps(entityID);
        if (isPositionInsideBox(MyAvatar.position, {position: position, rotation: rotation})) {
            attemptTeleportation();
        }
    };

    this.enterEntity = function(entityID) {
        // get latest props in case we changed the destination
        getProps(entityID);
        print("enterEntity() .... The portal destination is " + portalDestination);
        attemptTeleportation();
    }; 
    
    this.leaveEntity = function(entityID) {
        print("leaveEntity() called ....");
        if (!animationURL) {
            getProps(entityID);
        }
        Entities.editEntity(entityID, {
            animation: { url: animationURL, currentFrame: 1, running: false }
        });

        playSound(entityID);
    };
    
    this.hoverEnterEntity = function(entityID) {
        print("hoverEnterEntity() called ....");
        if (!animationURL) {
            getProps(entityID);
        }
        Entities.editEntity(entityID, {
            animation: { url: animationURL, fps: 24, firstFrame: 1, lastFrame: 25, currentFrame: 1, running: true, hold: true }
        });
    };

    this.unload = function() {
        print("unloading teleport script");
    };
});