using System.Numerics;

namespace Smoll.Ex2 {
    sealed class InertiaComponent : Component {
        public Transform2D transform;
        public float dampening;
        private Transform2DComponent? ownerTransform;

        public InertiaComponent(float dampening = 1) 
        : this(dampening,0,0,0)
        {}

        public InertiaComponent(float dampening, float x, float y) 
        : this(dampening,x,y,0)
        {}

        public InertiaComponent(float dampening, float x, float y, float angle) {
            transform = new Transform2D();
            transform.position = y*Complex.ImaginaryOne + x;
            transform.angle = angle;
            transform.scale = 1;
            this.dampening = dampening;
        }

        public InertiaComponent(float dampening, Transform2D tr) {
            transform = tr;
            this.dampening = dampening;
        }


        public override void OnAttached() {
            ownerTransform = owner.GetComponent<Transform2DComponent>();
        }

        public override void Update(float deltaTimeSeconds)
        {
            ownerTransform ??= owner.GetComponent<Transform2DComponent>();
            ownerTransform ??= new Transform2DComponent();
            ownerTransform.transform.position += transform.position * deltaTimeSeconds;
            ownerTransform.transform.angle += transform.angle * deltaTimeSeconds;

            transform.position *= MathF.Pow(dampening, deltaTimeSeconds);
            transform.angle *= MathF.Pow(dampening, deltaTimeSeconds);
    
        }
    }

}