Stuck when want to make the AI in Turn-Based Strategy Game

Hai everyone, i already can make the movement grid via pathfinding and avoid obstacles for the player. Right now, i want to make the AI move itself based on the how many movement grid and the action point (just like the player does). But, i don't know how to do it.. Right now, i just able to make the character move to the position (but it is not follow the pathfinding, this character suppose to be the AI).. I am stack at this and try to solve this problem, but couldn't. Could you guys help me out? Thanks.

Here is the code that i mention in the above (can make the character which is suppose to be AI to move to the position, but it not follow the pathfinding):

 using UnityEngine;
 using System.Collections;
 
 public class AIPlayer : Player
 {
     void Awake()
     {
         moveDestination = transform.position;
     }
 
     // Use this for initialization
     void Start()
     {
         ColorChanger();
     }
     
     // Update is called once per frame
     void Update()
     {
     
     }
     
     
     public override void TurnUpdate()
     {
         if (GameManager.instance.currentPlayerIndex == 5)
         {
             if (Vector3.Distance(moveDestination, transform.position) > 0.1f)
             {
                 transform.position += (moveDestination - transform.position).normalized * moveSpeed * Time.deltaTime;
 
                 if (Vector3.Distance(moveDestination, transform.position) <= 0.1f)
                 {
                     transform.position = moveDestination;
                     actionPoints--;
                 }
             }
 
             else
             {
                 moveDestination = new Vector3(2 - Mathf.Floor(GameManager.instance.mapSize / 2), 1.5f, -2 + Mathf.Floor(GameManager.instance.mapSize / 2));
                 GameManager.instance.NextTurn();
             }
         }
 
         base.TurnUpdate();
     }
 
     public override void TurnOnGUI()
     {
         
     }
 
     public override void ColorChanger()
     {
         base.ColorChanger();
     }
 }

Here is the link video for the game:

http://www.youtube.com/watch?v=eo7DzbBPQBs&feature=youtu.be