using UnityEngine;

namespace UMA
{
    /// <summary>
    /// Auxillary slot which adds a TwistBone component for the forearms of a newly created character.
    /// </summary>
    public class ForearmTwistSlotScript : MonoBehaviour 
	{
		public string LeftHandBoneName = "LeftHand";
		public string RightHandBoneName = "RightHand";
		public string LeftForeArmTwistBoneName = "LeftForeArmTwist";
		public string RightForeArmTwistBoneName = "RightForeArmTwist";

		static int leftHandHash;
		static int rightHandHash;
		static int leftTwistHash;
		static int rightTwistHash;
		static bool hashesFound = false;

		public void OnDnaApplied(UMAData umaData)
		{
			if (!hashesFound)
			{
				leftHandHash = UMAUtils.StringToHash(LeftHandBoneName);
				rightHandHash = UMAUtils.StringToHash(RightHandBoneName);
				leftTwistHash = UMAUtils.StringToHash(LeftForeArmTwistBoneName);
				rightTwistHash = UMAUtils.StringToHash(RightForeArmTwistBoneName);
				hashesFound = true;
			}

			GameObject leftHand = umaData.GetBoneGameObject(leftHandHash);
			GameObject rightHand = umaData.GetBoneGameObject(rightHandHash);
			GameObject leftTwist = umaData.GetBoneGameObject(leftTwistHash);
			GameObject rightTwist = umaData.GetBoneGameObject(rightTwistHash);

			if ((leftHand == null) || (rightHand == null) || (leftTwist == null) || (rightTwist == null))
			{
				if (Debug.isDebugBuild)
                {
                    Debug.LogError("Failed to add Forearm Twist to: " + umaData.name);
                }

                return;
			}

			if (umaData.gameObject.GetComponent<TwistBones>() == null)
			{
				var twist = umaData.gameObject.AddComponent<TwistBones>();
				twist.twistValue = 0.5f;
				twist.twistBone = new Transform[] { leftTwist.transform, rightTwist.transform };
				twist.refBone = new Transform[] { leftHand.transform, rightHand.transform };
			}
		}
	}
}