Simplify data representation

src/Printbase.Domain/Entities/Products/ProductVariant.cs

@@ -2,96 +2,12 @@ namespace Printbase.Domain.Entities.Products;
 
 public class ProductVariant
 {
-    public Guid Id { get; private set; }
-    public Guid ProductId { get; private set; }
-    public string? Color { get; private set; }
-    public string? Size { get; private set; }
-    public decimal Price { get; private set; }
-    public decimal? Discount { get; private set; }
-    public int Stock { get; private set; }
-    
-    private ProductVariant() { }
-    
-    public ProductVariant(Guid id, Guid productId, decimal price, string? color = null, string? size = null, 
-        decimal? discount = null, int stock = 0)
-    {
-        if (price < 0)
-            throw new ArgumentException("Price cannot be negative", nameof(price));
-            
-        Id = id;
-        ProductId = productId;
-        Color = color;
-        Size = size;
-        Price = price;
-        Discount = discount;
-        Stock = stock;
-    }
-    
-    public void UpdateColor(string? color)
-    {
-        Color = color;
-    }
-    
-    public void UpdateSize(string? size)
-    {
-        Size = size;
-    }
-    
-    public void UpdatePrice(decimal price)
-    {
-        if (price < 0) throw new ArgumentException("Price cannot be negative", nameof(price));
-            
-        Price = price;
-    }
-    
-    public void UpdateDiscount(decimal? discount)
-    {
-        if (discount is < 0 or > 100)
-            throw new ArgumentException("Discount must be between 0 and 100", nameof(discount));
-            
-        Discount = discount;
-    }
-    
-    public void UpdateStock(int quantity)
-    {
-        if (quantity < 0)
-            throw new ArgumentException("Stock quantity cannot be negative", nameof(quantity));
-            
-        Stock = quantity;
-    }
-    
-    public void AddStock(int quantity)
-    {
-        if (quantity <= 0)
-            throw new ArgumentException("Quantity to add must be positive", nameof(quantity));
-            
-        Stock += quantity;
-    }
-    
-    public bool RemoveStock(int quantity)
-    {
-        if (quantity <= 0)
-            throw new ArgumentException("Quantity to remove must be positive", nameof(quantity));
-            
-        if (Stock < quantity) return false;
-            
-        Stock -= quantity;
-        return true;
-    }
-    
-    public decimal GetEffectivePrice(decimal? productDiscount = null)
-    {
-        var effectivePrice = Price;
-        
-        var discountToApply = Discount ?? productDiscount;
-        
-        if (discountToApply is > 0) effectivePrice -= (effectivePrice * discountToApply.Value / 100);
-        
-        return Math.Round(effectivePrice, 2);
-    }
-    
-    public decimal? GetEffectiveDiscount(decimal? productDiscount = null)
-    {
-        return Discount ?? productDiscount;
-    }
+    public Guid Id { get; init; }
+    public Guid ProductId { get; init; }
+    public string? Color { get; init; }
+    public string? Size { get; init; }
+    public decimal Price { get; init; }
+    public decimal? Discount { get; init; }
+    public int Stock { get; init; }
+    public Product Product { get; init; } = null!;
 }