add random sfx to zombies

Assets/Scripts/ZombieController.cs

@@ -1,8 +1,8 @@
-using NUnit.Framework;
 using UnityEngine;
 
 [RequireComponent(typeof(Animator))]
 [RequireComponent(typeof(Rigidbody))]
+[RequireComponent(typeof(AudioSource))]
 public class ZombieController : MonoBehaviour
 {
     private static readonly int DieHash = Animator.StringToHash("Die");
@@ -25,8 +25,14 @@ public class ZombieController : MonoBehaviour
     private readonly float attackCooldown = 1f;
     private float lastAttackTime;
 
+    [Header("Sounds")]
+    [SerializeField] private AudioClip[] sfx;
+    [SerializeField] private int sfxDelay = 5; // seconds
+
     private Transform player;
     private Animator animator;
+    private AudioSource audioSource;
+    private float lastSfxPlay;
 
     private bool IsDead() => currentHealth == 0;
 
@@ -35,12 +41,15 @@ public class ZombieController : MonoBehaviour
         currentHealth = maxHealth;
         animator = GetComponent<Animator>();
         player = GameObject.FindGameObjectWithTag("Player").transform;
+        audioSource = GetComponent<AudioSource>();
     }
 
     private void Update()
     {
         if (IsDead()) return;
 
+        PlaySfx();
+
         float distance = Vector3.Distance(transform.position, player.position);
 
         if (distance <= attackDistance)
@@ -64,6 +73,23 @@ public class ZombieController : MonoBehaviour
         }
     }
 
+    private AudioClip PickSfx()
+    {
+        return sfx[UnityEngine.Random.Range(0, sfx.Length)];
+    }
+
+    private void PlaySfx()
+    {
+        if (Time.time - lastSfxPlay <= sfxDelay)
+        {
+            return;
+        }
+
+        var clip = PickSfx();
+        audioSource.PlayOneShot(clip);
+        lastSfxPlay = Time.time;
+    }
+
     private void MoveToPlayer(float speed)
     {
         Vector3 direction = (player.position - transform.position).normalized;