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

namespace Fitness_core_BE.Models
{
    /// <summary>A stocked item sold at the gym (snacks, supplements, merchandise). QuantityOnHand
    /// is a maintained running balance -- adjusted by GoodsReceivedNoteItem (+), SaleItem (-) and
    /// StockReturn (-) -- not computed from those tables on every read.</summary>
    public class Product
    {
        [Key]
        public Guid ProductId { get; set; }

        public Guid FKClientId { get; set; }
        [ForeignKey(nameof(FKClientId))]
        public Client Client { get; set; }

        [MaxLength(128)]
        public string Name { get; set; } = string.Empty;

        [MaxLength(64)]
        public string? Sku { get; set; }

        /// <summary>Relative /Uploads path to the product's photo (same convention as
        /// ClientBusiness.BusinessLogoId) -- null when no image has been uploaded.</summary>
        [MaxLength(300)]
        public string? ImageId { get; set; }

        [MaxLength(20)]
        public string UnitOfMeasure { get; set; } = "pcs";

        /// <summary>Set from the most recent GRN line's UnitCost -- a simple latest-cost
        /// approach, not a weighted average.</summary>
        public decimal CostPrice { get; set; } = 0m;

        public decimal SellingPrice { get; set; } = 0m;

        public decimal QuantityOnHand { get; set; } = 0m;

        public bool IsActive { get; set; } = true;
        public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
    }
}