using CandyHouseBase.Exceptions;
using CandyHouseBase.Extensions;
using CandyHouseBase.Infrastructure;

namespace CandyHouseBase.DataModels
{
    public class IngredientStockDataModel : IValidation
    {
        public string IngredientId { get; private set; }
        public int Quantity { get; private set; }

        public IngredientStockDataModel(string ingredientId, int quantity)
        {
            IngredientId = ingredientId;
            Quantity = quantity;
        }

        public void Validate()
        {
            if (!IngredientId.IsGuid()) throw new ValidationException("IngredientId must be a GUID");
            if (Quantity < 0) throw new ValidationException("Quantity cannot be negative");
        }

        public void AddStock(int amount)
        {
            if (amount <= 0) throw new ValidationException("Added quantity must be positive");
            Quantity += amount;
        }

        public void RemoveStock(int amount)
        {
            if (amount <= 0) throw new ValidationException("Removed quantity must be positive");
            if (amount > Quantity) throw new ValidationException("Not enough stock available");
            Quantity -= amount;
        }
    }
}