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


namespace NodeCanvas.Tasks.Actions
{
    [Name("Seek Path (navmesh)")]
    [Category("Kilosoft/Movement")]
    public class SeekPathAction : ActionTask<NavMeshAgent>
    {
        [RequiredField]
        public BBParameter<GameObject> target;
        public BBParameter<float> speed = 4;
        public BBParameter<float> keepDistance = 0.1f;

        private Vector3? lastRequest;

        protected override string info => "Seek (navmesh) " + target;

        protected override void OnExecute() 
        {
            if (target.value == null)
            {
                EndAction(false); 
                return;
            }
            
            agent.speed = speed.value;
            
            if (Vector3.Distance(agent.transform.position, target.value.transform.position) <= agent.stoppingDistance + keepDistance.value)
            {
                EndAction(true);
                return;
            }
        }

        protected override void OnUpdate() 
        {
            if (target.value == null)
            {
                EndAction(false); return;
            }
            
            var pos = target.value.transform.position;
            
            if ( lastRequest != pos ) 
            {
                if (!agent.SetDestination(pos)) 
                {
                    EndAction(false);
                    return;
                }
            }

            lastRequest = pos;

            if (!agent.pathPending && agent.remainingDistance <= agent.stoppingDistance + keepDistance.value)
            {
                EndAction(true);
            }
        }

        protected override void OnPause()
        {
            OnStop();
        }
        
        protected override void OnStop()
        {
            if (agent.gameObject.activeSelf)
            {
                agent.ResetPath();
            }
            lastRequest = null;
        }

        public override void OnDrawGizmosSelected()
        {
            if ( target.value != null )
            {
                Gizmos.DrawWireSphere(target.value.transform.position, keepDistance.value);
            }
        }
    }
}