using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.XR.MagicLeap;

public class HandTrackScript : MonoBehaviour {
	#region  Public Variables
	public enum HandPoses { Ok, Finger, Thumb, OpenHandBack, Fist, NoPose };
	public HandPoses pose = HandPoses.NoPose;
	public Vector3[] pos;
	public GameObject sphereThumb, sphereIndex, sphereWrist;
	#endregion

    #region Private Variables
	private MLHandKeyPose[] _gestures;
	#endregion

	#region Unity Methods
    private void Awake() {
        MLHands.Start();
        _gestures = new MLHandKeyPose[5];
        _gestures[0] = MLHandKeyPose.Ok;
        _gestures[1] = MLHandKeyPose.Finger;
        _gestures[2] = MLHandKeyPose.OpenHandBack;
        _gestures[3] = MLHandKeyPose.Fist;
		_gestures[4] = MLHandKeyPose.Thumb;
		MLHands.KeyPoseManager.EnableKeyPoses(_gestures, true, false);
		pos = new Vector3[3];
	}
	private void OnDestroy() {
		MLHands.Stop();
	}

    private void Update() {
        if (GetGesture(MLHands.Left, MLHandKeyPose.Ok)) {
			pose = HandPoses.Ok;
		}
		else if (GetGesture(MLHands.Left, MLHandKeyPose.Finger)) {
			pose = HandPoses.Finger;
		}
		else if (GetGesture(MLHands.Left, MLHandKeyPose.OpenHandBack)) {
			pose = HandPoses.OpenHandBack;
		}
		else if (GetGesture(MLHands.Left, MLHandKeyPose.Fist)) {
			pose = HandPoses.Fist;
		}
		else if (GetGesture(MLHands.Left, MLHandKeyPose.Thumb)) {
			pose = HandPoses.Thumb;
		}
		else {
			pose = HandPoses.NoPose;
		}

        if (pose != HandPoses.NoPose) ShowPoints();
    }
	#endregion

	#region Private Methods
	private void ShowPoints() {
		// Left Hand Thumb tip
		pos[0] = MLHands.Left.Thumb.KeyPoints[0].Position;
		// Left Hand Index finger tip
		pos[1] = MLHands.Left.Index.KeyPoints[0].Position;
		// Left Hand Wrist
		pos[2] = MLHands.Left.Wrist.KeyPoints[0].Position;
		sphereThumb.transform.position = pos[0];
		sphereIndex.transform.position = pos[1];
		sphereWrist.transform.position = pos[2];
	}

    private bool GetGesture(MLHand hand, MLHandKeyPose type) {
        if (hand != null) {
            if (hand.KeyPose == type) {
                if (hand.KeyPoseConfidence > 0.9f) {
                    return true;
                }
            }
        }
        return false;
    }
	#endregion

}