namespace Example
{
    public class EnemySpawner : Monobehaviour
    {
        [SerializeField, Required] private ObjectPool _objectPool;    // Shows an error in the inspector when the field is not assigned
        [SerializeField] private Optinal<Transform> _optionalParent; //  Mark this variable as not being required, has a toggle in the inspector to make it more clear
        
        [Header("Spawn Settings")]
        [SerializeField, CustomName("Interval")] private MinMax _spawnInterval;
        [SerializeField, CustomName("Amount")] private MinMaxInt _spawnAmount;
        [SerializeField, CustomName("Radius")] private float _spawnRadius;
        [SerializeField] private Weighted<EnemyData>[] _randomEnemyData; // A helper struct for doing easy weighted randomness
        
        private Transform _parent;
        private float _nextSpawn;
        
        
        private void Awake()
        {
            _parent = _optionalParent.enabled ? _optionalParent.value : transform; // More efficient than checking object for null
            _lastSpawnd = Time.time + _spawnInterval.Random()
        }
        
        
        private void Update()
        {
            if (Time.time < _nextSpawn) return;
            _nextSpawn = Time.time + _spawnInterval.Random();
            
            SpawnBatch(_spawnAmount.Random());
        }
        
        
        [Button]
        private void SpawnBatch(int spawnAmount)
        {
            for (int i = spawnAmount; i --> 0;) {
                PoolItem item = _objectPool.SpawnItem(Random.insideUnitCircle.With(y: 0) * _spawnRadius, _parent);
                
                Enemy enemy = item.GetComponent<Enemy>();
                enemy.EnemyData = _randomEnemyData.Random();
                
                StartCoroutine(Routines.Delay(i * .5f, () => enemy.WakeUp())) // You can use this instead of creating a new routine in the script
            }
        }
    }
)