Edit this script so that the player stops at a distance and attack?

Hello! Is there a way for this script to be edited so that the player stops at a certain distance before the enemy and then start attacking? Or maybe it's got to do with the ClickToMove script that i use? (http://wiki.unity3d.com/index.php/Click_To_Move_C the one i use). Any tips on how to approach such a task or even the code itself would be awesome. Thanks!

using UnityEngine; using System.Collections;

public class PlayerAttack : MonoBehaviour { public GameObject target; public float attackTimer; public float coolDown;

 // Use this for initialization
 void Start () {
     attackTimer = 0;
     coolDown = 2.0f;
     
     target = GameObject.FindWithTag("Enemy");

 }
 
 // Update is called once per frame
 void Update () {
     if(attackTimer > 0)
         attackTimer -= Time.deltaTime;
     
     if(attackTimer < 0)
         attackTimer = 0;
     if(Input.GetKeyUp(KeyCode.F)){
         if(attackTimer == 0)
             Attack();
             attackTimer = coolDown;
         
     }
 }        
 
 private void Attack(){
     float distance = Vector3.Distance(target.transform.position, transform.position);
     
     Debug.Log (distance);

     if(distance < 2.5f) {
         EnemyHealth eh = (EnemyHealth)target.GetComponent("EnemyHealth");
         eh.AdjustCurrentHealth(-10);
     }
 }

}