using UnityEngine;
using System.Collections;

public class Enemy : MonoBehaviour
{
    public float speed = 10f;
    private Transform target;
    private int wavePointIndex = 0;

    Waypoint wayPoint;

    // Use this for initialization
    void Start()
    {
        GameObject tempObj = GameObject.Find("Waypoints");
        wayPoint = tempObj.GetComponent<Waypoint>();

        if (wayPoint.points != null)
        {
            target = wayPoint.points[0];
        }
        else
        {
            wayPoint.initPoints();
            target = wayPoint.points[0];
        }
        // An error pops up on the first frame for this line of code below
    }

    // Update is called once per frame
    void Update()
    {
        // This is the main source of the error below.
        Vector3 dir = target.position - transform.position;
        transform.Translate(dir.normalized * speed * Time.deltaTime, Space.World);

        if (Vector3.Distance(transform.position, target.position) <= 0.4f)
        {
            GetNextWayPoint();
        }
    }

    void GetNextWayPoint()
    {
        if (wavePointIndex >= wayPoint.points.Length - 1)
        {
            Destroy(gameObject);
            return;
        }
        wavePointIndex++;
        target = wayPoint.points[wavePointIndex];
    }
}