Enemy not detecting player

Hello, I'm making a turret AI and have attached a trigger to it. Once the player enters the trigger the turret should look at it. In order to do that I created a bool variable which should become false once the player enters the trigger but it's not working. Here's my script for the turret:

 using UnityEngine;
 using System.Collections;
 
 public class TurretAI : MonoBehaviour {
     public  bool idleState = TurretSight.idleState;
     public float speed = 10;
     public Transform player;
     public float degree; 
 
     // Use this for initialization
     void Start () {
         idleState = true;
     }
     
     // Update is called once per frame
     void Update () {
         if(idleState){
             transform.Rotate(Vector3.up * Time.deltaTime * speed);
             degree += Time.deltaTime;
             if(degree >= 2){
                 speed *= -1;
                 degree = -2;
             }
         }
         else
             transform.LookAt(player);
     }
 
 }
 

And here's the turret's sight (PS: it's a custom pyramid collider from another gameobject)

 using UnityEngine;
 using System.Collections;
 
 public class TurretSight : MonoBehaviour {
 
     public static bool idleState;
     public GameObject player;
 
     // Use this for initialization
     void Start () {
     
     }
     
     // Update is called once per frame
     void Update () {
     }
 
     void OnTriggerStay(Collider enter){
         if(enter.gameObject == player){
             idleState = false;
         }
     }
 
     void OnTriggerExit(Collider exit){
         if(exit.gameObject == player)
             idleState = false;
     }
 
 
 }
 

Any help will be greatly appreciated. Thanks in advance.