using System.Collections.Generic;
using Tanshu.Accounts.Contracts;

namespace Tanshu.Accounts.Entities
{
    public class Inventory
    {
        public Inventory()
        {
            // ReSharper disable DoNotCallOverridableMethodsInConstructor
            InventoryModifier = new List<InventoryModifier>();
            // ReSharper restore DoNotCallOverridableMethodsInConstructor
        }

        public virtual int InventoryID { get; set; }

        [NotNull]
        public virtual Kot Kot { get; set; }

        [NotNull]
        public virtual Product Product { get; set; }

        public virtual decimal Quantity { get; set; }
        public virtual decimal Price { get; set; }
        public virtual decimal FullPrice { get; set; }
        public virtual decimal ServiceCharge { get; set; }
        public virtual bool IsScTaxable { get; set; }
        public virtual decimal ServiceTax { get; set; }
        public virtual decimal Vat { get; set; }
        public virtual decimal Discount { get; set; }

        [Cascade]
        public virtual IList<InventoryModifier> InventoryModifier { get; set; }

        [Formula(Formula = "CASE WHEN IsScTaxable = 1 THEN Quantity * Price * (1 - Discount) * (1 + ServiceCharge) * (1 + ServiceTax + Vat) ELSE Quantity * Price * (1 - Discount) * (1 + ServiceCharge + ServiceTax + Vat) END")]
        public virtual decimal Amount
        {
            get
            {
                if (IsScTaxable)
                    return Quantity * Price * (1 - Discount) * (1 + ServiceCharge) * (1 + ServiceTax + Vat);
                return Quantity * Price * (1 - Discount) * (1 + ServiceCharge + ServiceTax + Vat);
            }
            private set { }
        }
    }
}