Enemy model , AI and animation is not working properly

So hi guys , i am just learning unity and and is running into a bunch and by that i mean a bunch of problems. First of all my enemy character completely loses its shape when i make a humanoid rig out of it so when i use lookat function with generic rig , his whole body turns up and down . He even faces the opposite way when using lookat but i did some things and fixed (if u guys have a better solution i can do in either blender or unity to fix it pls tell). Secondly and most important one its animation . I have made a script where it should chase player when in a certain range( 10f ) and thus play the run animation . But i also want it to stop running behind the player when the player is beyond limits and thus change to idle animation . But the distance between enemy and player is stuck at 9.91 or something after 9.5f and the enemy keeps on playing run animation . Please tell me a fix for it . My game is in 3D .

Enemy Script

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.AI;
 
 public class EnemyCOntroller : MonoBehaviour
 {
     public float lookRadius = 15f;
     NavMeshAgent agent;
     Transform target;
     float distance;
     private Animator animator;
     private float horizontalInput;
     private float attackRAnge = 7f;
 
     // Start is called before the first frame update
     void Start()
     {
         target = PlayerManager.instance.player.transform;
         agent = GetComponent<NavMeshAgent>();
         animator = GetComponent<Animator>();
        
     }
 
     // Update is called once per frame
     void Update()
     {
         horizontalInput = Input.GetAxis("Horizontal");
         distance = Vector3.Distance(target.position, transform.position);
         attackRAnge = Vector3.Distance(target.position, transform.position);
         if (distance <= lookRadius)
         {
             agent.SetDestination(target.position);
             animator.SetFloat("Run", attackRAnge) ;
             
             FaceTarget();
         }
         else
         {
             
         }
         
         if (distance <= 7f)
         {
 
             agent.SetDestination(transform.position);
 
         }
         
 
         animator.SetFloat("Attack", attackRAnge);
     }
     
    
 
 
     void FaceTarget()
     {
 
         transform.LookAt(2 * transform.position - target.position);
 
 
     }
 
 
     private void OnDrawGizmosSelected()
     {
         Gizmos.color = Color.red;
         Gizmos.DrawWireSphere(transform.position, lookRadius);
     }
 
     
 
 
 }