using System.ComponentModel.DataAnnotations.Schema;
using Microsoft.EntityFrameworkCore;

namespace Distribution.Models
{
    public class GoodsReceiptItem : Template
    {
        public Guid FK_GoodsReceiptId { get; set; }
        [ForeignKey("FK_GoodsReceiptId")]
        public GoodsReceipt GoodsReceipt { get; set; }

        /// <summary>Null for a direct receipt line (no purchase order); FK_ItemId is set instead.</summary>
        public Guid? FK_PurchaseOrderItemId { get; set; }
        [ForeignKey("FK_PurchaseOrderItemId")]
        public PurchaseOrderItem? PurchaseOrderItem { get; set; }

        /// <summary>Set for direct receipt lines. PO-based lines resolve the item through PurchaseOrderItem.</summary>
        public Guid? FK_ItemId { get; set; }
        [ForeignKey("FK_ItemId")]
        public Item? Item { get; set; }

        /// <summary>Added to warehouse stock.</summary>
        public int AcceptedQuantity { get; set; }

        /// <summary>Damaged/short at receipt, not added to stock.</summary>
        public int RejectedQuantity { get; set; } = 0;

        /// <summary>
        /// Units the supplier gave at no charge. Received into stock like accepted units, but never
        /// costed and never counted against the purchase order's ordered quantity.
        /// </summary>
        public int FreeQuantity { get; set; } = 0;

        /// <summary>Cost per base-UOM unit. Only accepted units are costed.</summary>
        [Precision(18, 2)]
        public decimal UnitCost { get; set; }

        [Precision(5, 2)]
        public decimal DiscountPercent { get; set; }

        [Precision(5, 2)]
        public decimal VatPercent { get; set; }

        [Precision(5, 2)]
        public decimal NbtPercent { get; set; }

        /// <summary>Populated when the received item tracks batches and/or expiry dates.</summary>
        public ICollection<GoodsReceiptItemBatch> Batches { get; set; } = [];

        /// <summary>Populated when the received item tracks serial numbers.</summary>
        public ICollection<GoodsReceiptItemSerial> Serials { get; set; } = [];
    }
}