using System;

namespace FspWebApp.Entity.Client
{
    /// <summary>
    /// Specify how a item mesured, by volumn (galon) or piece.
    /// </summary>
    public enum PosItemUnitId { VOL, PCS }

    /// <summary>
    /// POCO for Pos Item
    /// Same sort of product could use the same itemId with diff barcode.
    /// barcode should always be unique.
    /// </summary>
    public class PosItem
    {
        //[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
        //public Guid Id { get; set; }

        ///// <summary>
        ///// predefined by business.
        ///// could have one itemid correlated to multiple BarCode, one icecream with diff colors??
        ///// </summary>
        ////[Index("IX_ItemIdChangesetBarCode", 1, IsUnique = true)]
        //[Index("IX_ItemId", IsUnique = false)]
        //[Required]
        //[MaxLength(20)]
        public string ItemId { get; set; }

        /// <summary>
        /// predefined by business.
        /// could have one itemid correlated to multiple BarCode, one icecream with diff colors??
        /// </summary>
        public string BarCode { get; set; }

        /// <summary>
        /// for keep all history item, import this version
        /// </summary>
        //[Index("IX_ItemIdChangesetBarCode", 3, IsUnique = true)]
        //[Index("IX_BarCodeChangeset", 2, IsUnique = true)]
        //public Guid? ChangesetId { get; set; }

        //[ForeignKey("ChangesetId")]
        //public virtual Changeset Changeset { get; set; }

        ///// <summary>
        ///// predefined by business
        ///// </summary>
        //[Required]
        //[MaxLength(100)]
        public string ItemName { get; set; }

        //public PosItemUnitId UnitId { get; set; }

        public decimal Price { get; set; }

        //public DateTime DateToActivate { get; set; }

        //public DateTime DateToDeactivate { get; set; }

        ///// <summary>
        ///// Gets or sets the datetime when this PosItem created and saved into database.
        ///// normally this time should be automatically set at the saving time (to db).
        ///// </summary>
        //[Index("IX_CreatedDateTime", IsUnique = false)]
        //public DateTime CreatedDateTime { get; set; }

        public bool IsFuelItem { get; set; }

        ///// <summary>
        ///// Gets or sets if this item had been marked as deleted, and will not allow to sale anymore.
        ///// </summary>
        //public bool IsMarkedAsDeletion { get; set; }
        ///// <summary>
        ///// defined and involved in which Pos Discount definition.
        ///// The PosDiscount typically downloaded and parsed from a table download or BOS download.
        ///// </summary>
        ////public virtual List<PosDiscount> AppliedInPosDiscounts { get; set; }

        ///// <summary>
        ///// A PosItem should only belongs to one Group, but why we not setup a simple Foreign key property
        ///// here? because the Group must be chained with the BU of this PosItem assgined(a BU have ONLY ONE specified BU system at a time).
        ///// think about the case, a PosItem under BU A set with Group B, someday someone changed its BU to C, then the B for this Item 
        ///// is not available anymore, we have to  anually maintain(update B to something else, otherwise the item is still with the old group which even may not under the new group system) 
        ///// this 2 properties' relation otherwise this object is in a wrong state, which is bad.
        ///// the solution is to create a dedicated DB tables to maintain the PosItem and Group relation, rather to do that,
        ///// why not choose a ManyToMany property which EF support originally.
        ///// </summary>
        //public virtual List<PosItemGroup> AppliedInPosItemGroups { get; set; }

        //public virtual Guid TargetBusinessUnitId { get; set; }
    }
}