using UnityEngine;

 /*
  * This class is attached to a door handle. The door handle is child of a door.
  */
 public class PhysicsOpenDoor : MonoBehaviour
 {
     [SerializeField] private Rigidbody door;
     [SerializeField] private Vector3 force;
     [SerializeField] private Vector3 cross;
     [SerializeField] private bool holdingHandle;
     [SerializeField] private float angle;
     private const float forceMultiplier = 1500f;

    private void OnTriggerStay(Collider coll)
     {
         Debug.Log("Trigger Stay");
         Transform controller = coll.transform;
            if (Input.GetAxis(controller.name + " Grip Squeeze") != 0)
         {
            Debug.Log("Grip Pressed");
             holdingHandle = true;

             // Direction vector from the door's pivot point to the hand's current position
             Vector3 doorPivotToHand = controller.transform.position - transform.parent.position;

             // Ignore the y axis of the direction vector
            //  doorPivotToHand.y = 0;

             // Direction vector from door handle to hand's current position
             force = controller.transform.position - transform.position;

             // Cross product between force and direction.
             cross = Vector3.Cross(doorPivotToHand, force);
             angle = Vector3.Angle(doorPivotToHand, force);
         }
         else
         {
             holdingHandle = false;
         }
     }

     void Update()
     {
         if (holdingHandle)
         {
             // Apply cross product and calculated angle to
             door.angularVelocity = cross * angle * forceMultiplier;
         }
     }

     private void OnTriggerExit()
     {
         // Set angular velocity to zero if the hand stops hovering
         door.angularVelocity = Vector3.zero;
     }
 }