using System;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace Webshop.Domain.Entities;

/// <summary>
/// Für Produkte mit unterschiedlichen Attributen (z.B. Größe, Farbe) und eigenem Lagerbestand.
/// </summary>
public class ProductVariant
{
    [Key]
    public Guid Id { get; set; }

    [Required]
    [ForeignKey(nameof(Product))]
    public Guid ProductId { get; set; }

    [Required]
    [MaxLength(100)]
    public string Name { get; set; } // z.B. "Farbe", "Größe"

    [Required]
    [MaxLength(100)]
    public string Value { get; set; } // z.B. "Rot", "XL"

    // Unique-Constraint wird typischerweise via Fluent API konfiguriert
    [MaxLength(50)]
    public string? SKU { get; set; }

    // Precision wird via Fluent API konfiguriert
    [Required]
    public decimal PriceAdjustment { get; set; }

    [Required]
    public int StockQuantity { get; set; }

    [MaxLength(2000)]
    public string? ImageUrl { get; set; }

    [Required]
    public bool IsActive { get; set; }

    // Navigation Property
    public virtual Product Product { get; set; }
}