using NodeCanvas.Framework;
using ParadoxNotion.Design;
using UnityEngine;
using UnityEngine.AI;


namespace BITKit.Node {

	[Category("AI")]
	public class LookTargetSmooth : ActionTask<NavMeshAgent>
	{

		public BBParameter<Transform> target; 
			public BBParameter<bool> repeat = false;

			private Transform transform;
			private bool initialUpdateRotation;
		//Use for initialization. This is called only once in the lifetime of the task.
		//Return null if init was successfull. Return an error string otherwise
		protected override string OnInit() {
			transform = agent.transform;
			initialUpdateRotation = agent.updateRotation;
			return null;
		}
		public override void OnDrawGizmosSelected()
		{
			if (target.isNoneOrNull) return;
			Gizmos.color = Color.yellow;
			Gizmos.DrawLine(transform.position, target.value.position);
		}
		protected override string info
		{
			get
			{
				if(!transform|| !target.value) return "No target";
				return "Not Initialized";
			}
		}

		//This is called once each time the task is enabled.
		//Call EndAction() to mark the action as finished, either in success or failure.
		//EndAction can be called from anywhere.
		protected override void OnExecute()
		{
			agent.updateRotation = false;
		}
		//Called once per frame while the action is active.
		protected override void OnUpdate() {
			if (target.isNoneOrNull) return;
			
			var _dir = target.value.position - transform.position;
			
			var direction =Quaternion.LookRotation(Vector3.ProjectOnPlane(_dir ,Vector3.up)) ;
			
			transform.rotation = Quaternion.RotateTowards(transform.rotation,direction,Time.deltaTime*agent.angularSpeed);
			
			if (repeat.value is false && transform.rotation == direction)
			{
				EndAction(true);
			}
		}

		//Called when the task is disabled.
		protected override void OnStop() {
			agent.updateRotation = initialUpdateRotation;
		}

		//Called when the task is paused.
		protected override void OnPause() {
			
		}
	}
}