public int Buy(IProducts product, int?totalMoney)
{
var stayAlive = true;
Display display = new Display();
do
{
try
{
// Picking 5 because in this assignment the lowest costing product I have costs 5.
if (totalMoney < 5)
{
throw new FormatException($"You do not have enough money to buy {product.Name}.");
}
else
{
totalMoney -= product.Cost;
product.Bought(product.Name);
var choice = Convert.ToChar(Console.ReadKey(true));
if (choice == 'y')
{
product.UseProduct(product.Name);
stayAlive = false;
}
else if (choice == 'n')
{
stayAlive = false;
}
else
{
throw new ArgumentException("You did not pick a valid input. Please try again.");
}
}
}
catch (ArgumentNullException ex)
{
display.ErrorMessage(ex.Message);
}
catch (FormatException ex)
{
display.ErrorMessage(ex.Message);
}
catch (Exception)
{
display.ErrorMessage("Something went wrong.");
}
} while (stayAlive);
return((int)totalMoney);
}
