ex-oop-05-coffe-vending-machine/CoffeeVendingMachines/Product.cs

namespace CoffeeVendingMachines;

public class Product
{
    public const int FallbackPrice = 50;
    private readonly int _price;
    private int _stock;
    public bool InStock => _stock > 0;
    public string Name { get; }
    public int NumberSold { get; private set; }
    public int Price => _price;
    
    public Product (string name, int price = FallbackPrice, int stock = 0)
    {
        Name = name;
        _price = price;
        _stock = stock;
        if(price <= 0 || price % 5 != 0)
        {
            _price = FallbackPrice;
        }
    }

    public bool AddSale()
    {
        if (InStock)
        {
            NumberSold++;
            _stock--;
            return true;
        }

        return false;
    }

    public override string ToString()
    {
        return $"{Name,-10} € {(decimal)Price/100:0.00} [{_stock} in stock | {NumberSold} sold]";
    }
}