var currentBubble = null;

var BUBBLE_MODEL = "http://hifi-production.s3.amazonaws.com/DomainContent/Toybox/bubblewand/bubble.fbx";
 
    var BUBBLE_INITIAL_DIMENSIONS = {
        x: 0.03,
        y: 0.03,
        z: 0.03
    };
 
    var BUBBLE_LIFETIME_MIN = 3;
    var BUBBLE_LIFETIME_MAX = 8;
    var BUBBLE_SIZE_MIN = 0.05;
    var BUBBLE_SIZE_MAX = 0.15;
    var BUBBLE_LINEAR_DAMPING = 0.2;
    var BUBBLE_GRAVITY_MIN = 0.1;
    var BUBBLE_GRAVITY_MAX = 0.3;

function radiusFromVolume(volume) {
    return Math.pow(volume / ((4/3) * Math.PI),(1/3));
}
var bubbleSizeMultiplier = 1;
var BREATH_RATE = 0.01; // 0.01 Liters per second
var breathedAir = 0.0; //
Script.update.connect(function(deltaTime) {
    if (MyAvatar.audioAverageLoudness > 50) {
        breathedAir += deltaTime * BREATH_RATE;
	    if (currentBubble == null) {
            currentBubble = Entities.addEntity({
                name: 'Bubble',
                type: 'Model',
                modelURL: BUBBLE_MODEL,
                position: MyAvatar.getJointPosition(MyAvatar.jointNames.indexOf("Head")),
                dimensions: BUBBLE_INITIAL_DIMENSIONS,
                dynamic: false,
                collisionless: true,
                damping: BUBBLE_LINEAR_DAMPING,
                shapeType: 'sphere',
                lifetime: 60 // Noone exhales for 60 seconds hopefully!
            });
            return;
        }
        Entities.editEntity(currentBubble, {dimensions: Vec3.multiply({x: 2, y: 2, z: 2}, radiusFromVolume(breathedAir))});
        return;
    }
    if (currentBubble) {
        Entities.editEntity(currentBubble, {
            lifetime: 20,
            velocity: Vec3.sum(Vec3.multiplyQbyV(MyAvatar.orientation, {x: 0, y: 0, z: -1}), {y: 1})
        });
        currentBubble = null;
        breathedAir = 0.0;
    }
});