/// <summary>
/// Rob's Purchase method
/// </summary>
/// <returns></returns>
///
public Animal PurchaseAnimal <T>(Person person, string identifier = null)
{
var satanicBeast = _shelterRepository.GetAnimal <T>(identifier);
// check if the cat is not null, if null inform user about it
//if (satanicBeast == null) throw new Exception("This is a very rare null animal, you cannot has it");
if (person.Money < satanicBeast.Price)
{
throw new Exception($"{person.Name} cannot afford this majestic creature.");
}
// cat need to be removed after selling it
Console.WriteLine($"{person.Name} is buying {satanicBeast.Name} for £{satanicBeast.Price}.");
_shelterRepository.RemoveAnimal(satanicBeast);
person.OwnedAnimals.Add(satanicBeast.Name, satanicBeast);
person.Money -= satanicBeast.Price;
Console.WriteLine($"{satanicBeast.GetType().Name} successfully bought" +
$"\n{person.Name} has £{System.Math.Round(person.Money, 2)} left.");
return(satanicBeast);
}