Weapon

class Weapon
{
    private readonly int _damage;
    private int _bullets;

    public bool HaveBullets => _bullets > 0;

    public void Fire(IDamagable target)
    {
        if (HaveBullets)
        {
            target.TakeDamage(_damage);
            _bullets--;
        }
    }
}

class Player : IDamagable
{
    private int _health;

    public bool IsAlive => _health > 0;

    public void TakeDamage(int damage)
    {
        if (IsAlive)
            _health = _health > damage ? _health - damage : 0;
    }
}

class Bot
{
    private Weapon _weapon;

    public void OnSeePlayer(Player player)
    {
        if (player.IsAlive && _weapon.HaveBullets)
            _weapon.Fire(player);
    }
}

interface IDamagable
{
    public void TakeDamage(int damage) { }
}