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

namespace NodeCanvas.Tasks.Actions {

	[Category("Core/Movement")]
	public class ProcessGravity : ActionTask<CharacterController>{
		public BBParameter<float> gravityScale = 1f;
		public BBParameter<float> gravityAcceleration = 1f;
		public BBParameter<float> gravityMax = 8f;

		private Vector3 currentVelocity;
		private bool freezeVelocity;
		
		private float gravityPower;
		//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(){
			MonoManager.current.onLateUpdate += LateUpdate;
			return null;
		}

		//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() {
			
		}

		//Called once per frame while the action is active.
		protected override void OnUpdate() {
			if (!freezeVelocity && agent.velocity != Vector3.zero){
				currentVelocity = new Vector3(agent.velocity.x, 0f, agent.velocity.y);
			}
		}

		void LateUpdate(){
			if (agent.isGrounded) {
				gravityPower = 0f;
				currentVelocity = Vector3.zero;
				freezeVelocity = true;
				agent.Move(Physics.gravity * .1f * Time.deltaTime);
				
			} else {
				if (currentVelocity == Vector3.zero && agent.velocity.y < 0f) {
					freezeVelocity = false;
				}

				Debug.Log(currentVelocity);

				agent.Move((Physics.gravity * gravityPower * Time.deltaTime));
			}
		}

		//Called when the task is disabled.
		protected override void OnStop() {
			EndAction(true);
		}

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