EnemyAI.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Pathfinding;

public class EnemyAI : MonoBehaviour
{
    public Transform target; //target of object

    public float speed = 200f; //speed of object
    public float nextWayPointDistance = 3f; //will tell object to find next waypoint

    Path path; //current path following
    int currentWaypoint = 0; //current waypoint of the path that it's following
    bool reachedEndofpath = false; //if it has reached the last waypoint

    Seeker seeker;//reference to a seeker script that lets enemy find player
    Rigidbody2D rb;

    public Transform enemyGFX;

    void Start()
    {
        seeker = GetComponent<Seeker>(); //gets the component called seeker
        rb = GetComponent<Rigidbody2D>(); //gets the rigidbody component

        InvokeRepeating("UpdatePath", 0f, .5f); //repeats process every time
       
    }

    void UpdatePath()
    {
        if (seeker.IsDone())
            seeker.StartPath(rb.position, target.position, OnPathComplete); //allows script to constantly create a path for the object
        
    }

    void OnPathComplete(Path p) //determines if creating the path is complete or not
    {
        if(!p.error)
        {
            path = p;
            currentWaypoint = 0;
        }
    }

    
    void FixedUpdate() //checks if it reached the end of the path
    {
        if (path == null)
            return;

        if (currentWaypoint >= path.vectorPath.Count) 
        {
            reachedEndofpath = true;
            return;
        }
        else
        {
            reachedEndofpath = false;
        }
        

        Vector2 direction = ((Vector2)path.vectorPath[currentWaypoint] - rb.position).normalized; //sets the direction of the object
        Vector2 force = direction * speed * Time.deltaTime; //adds force to the object

        rb.AddForce(force);

        float distance = Vector2.Distance(rb.position, path.vectorPath[currentWaypoint]);

        if (distance < nextWayPointDistance)
        {
            currentWaypoint++;
        }

        if (rb.velocity.x >= 0.01f) //flips the object when the player goes to the other side of the game object
        {
            enemyGFX.localScale = new Vector3(-1f, 1f, 1f);
        }
        else if (rb.velocity.x <= -0.01)
        {
            enemyGFX.localScale = new Vector3(1f, 1f, 1f);
        }
    }
}