EnemyAI

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

public abstract class EnemyAI : MonoBehaviour
{

    public string hitTag;

    public bool lookingAtPlayer = false;
    public bool isFiring        = false;
    public bool alerted         = false;
    public float fireRate       = 1.5f;

    public GameObject   enemy;
    public Transform    player;

    public AudioSource[] alertSounds;
    public int alertIndex = 0;

    public AudioSource attackSound;


    void Update()
    {
        RaycastHit hit;
        if(Physics.Raycast(transform.position, transform.TransformDirection(Vector3.forward), out hit))
        {
            hitTag = hit.transform.tag;
        }
        if(hitTag == "Player" && isFiring == false)
        {
            StartCoroutine(EnemyFire());
            if (!alerted)
            {
                playAlertSound();
                alerted = true;
            }
        }
        if(hitTag != "Player")
        {
            lookingAtPlayer = false;
        }
    }

    void playAlertSound()
    {
        System.Random rand = new System.Random();
        alertIndex = rand.Next(1, alertSounds.Length);
        alertSounds[alertIndex].Play();
    }

    IEnumerator EnemyFire()
    {
        isFiring = true;
        attackSound.Play();
        lookingAtPlayer = true;
        yield return new WaitForSeconds(Random.Range(.75f, 1.5f));
        isFiring = false;
    }

    public abstract void EnemyAttack();

};