Animate CAShapeLayer & Shadow independently - ios

Question

I have a 'UIView' Subclass called 'HexagonView' in which I create a layer to display a Hexagon. I then add another layer with the same path as shadow layer. I had to do it this way since I could not display a shadow outside of the 'layer.mask' Shape.
My goal is to animate a 360° rotation of the shape, while the shadow stays on it's position instead of moving around with the rotation.
See example image
This is the code I have so far:
#IBDesignable class HexagonView: UIView {
override func prepareForInterfaceBuilder()
{
super.prepareForInterfaceBuilder()
configureLayer()
addShadow()
}
override init(frame: CGRect)
{
super.init(frame: frame)
configureLayer()
addShadow()
}
required init?(coder aDecoder: NSCoder)
{
super.init(coder: aDecoder)
configureLayer()
addShadow()
}
func configureLayer()
{
let maskLayer = CAShapeLayer()
maskLayer.fillRule = kCAFillRuleEvenOdd
maskLayer.frame = bounds
UIGraphicsBeginImageContext(frame.size)
maskLayer.path = getHexagonPath().cgPath
UIGraphicsEndImageContext()
layer.addSublayer(maskLayer)
}
private func getHexagonPath() -> UIBezierPath
{
let width = frame.size.width
let height = frame.size.height
let padding = width * 1 / 8 / 2
let path = UIBezierPath()
path.move(to: CGPoint(x: width / 2, y: 0))
path.addLine(to: CGPoint(x: width - padding, y: height / 4))
path.addLine(to: CGPoint(x: width - padding, y: height * 3 / 4))
path.addLine(to: CGPoint(x: width / 2, y: height))
path.addLine(to: CGPoint(x: padding, y: height * 3 / 4))
path.addLine(to: CGPoint(x: padding, y: height / 4))
path.close()
return path
}
func addShadow()
{
let s = CAShapeLayer()
s.fillColor = backgroundColor?.cgColor
s.frame = layer.bounds
s.path = getHexagonPath().cgPath
layer.backgroundColor = UIColor.clear.cgColor
layer.addSublayer(s)
layer.masksToBounds = false
layer.shadowColor = AppAppearance.Colors.labelBackground.cgColor
layer.shadowOffset = CGSize(width: 5, height: 10)
layer.shadowOpacity = 0.5
layer.shadowPath = getHexagonPath().cgPath
layer.shadowRadius = 0
}
func rotate(duration: CFTimeInterval = 1.0, completionDelegate: AnyObject? = nil)
{
let rotateAnimation = CABasicAnimation(keyPath: "transform.rotation")
rotateAnimation.fromValue = 0.0
rotateAnimation.toValue = CGFloat(M_PI * 2.0)
rotateAnimation.duration = duration
rotateAnimation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
if let delegate = completionDelegate as? CAAnimationDelegate {
rotateAnimation.delegate = delegate
}
layer.add(rotateAnimation, forKey: nil)
}
}
How can I achieve the shadow rotation on its starting position rather than having it attached to the white layer.