private IPlayerHealthService playerHealthService;

[SerializeField] private Text _label;

private void Awake()
{
    playerHealthService = ServiceLocator.Get<IPlayerHealthService>();
    playerHealthService.HPChanged += PlayerHealthService_HPChanged;
}

private void OnDestroy()
{
    playerHealthService.HPChanged -= PlayerHealthService_HPChanged;
}

private void PlayerHealthService_HPChanged(int currentHP)
{
    Refresh(currentHP);
}

private void Refresh(int currentHP)
{
    _label.text = $"Player HP: {currentHP}";
}

public readonly struct CoinCollectedEvent : IEvent
{
    public readonly int Amount;

    public CoinCollectedEvent(int amount)
    {
        Amount = amount;
    }
}

public class Coin : MonoBehaviour
{
    private IEventService _eventService;

    [SerializeField] private int _coinValue = 1;

    private void Awake()
    {
        _eventService = ServiceLocator.Get<IEventService>();
    }

    private void OnTriggerEnter(Collider other)
    {
        if (other.CompareTag("Player"))
        {
            _eventService.Raise(new CoinCollectedEvent(_coinValue));
            Destroy(gameObject); // this should be replaced with an object pooling system
        }
    }
}