using System;
using System.Linq.Expressions;
using InABox.Core;

namespace Comal.Classes
{
    [UserTracking(typeof(Requisition))]
    public class RequisitionItem : Entity, IPersistent, IRemotable, INumericAutoIncrement<RequisitionItem>, ILicense<LogisticsLicense>
    {
        [IntegerEditor(Editable = Editable.Hidden)]
        [NullEditor]
        public int Sequence { get; set; }

        [EntityRelationship(DeleteAction.Cascade)]
        [NullEditor]
        public RequisitionLink RequisitionLink { get; set; }

        [EditorSequence(1)]
        public ProductLink Product { get; set; }

        [EditorSequence(2)]
        [NullEditor]
        public string BarCode { get; set; }

        [EditorSequence(3)]
        [CodeEditor(Visible = Visible.Hidden, Editable = Editable.Hidden)]
        public string Code { get; set; }

        [MemoEditor]
        [EditorSequence(4)]
        public string Description { get; set; }

        [EditorSequence(5)]
        public ProductStyleLink Style { get; set; }

        [EditorSequence(6)]
        public double Quantity { get; set; }

        [NullEditor]
        public StockHoldingLink Holding { get; set; }

        [EditorSequence(7)]
        public StockLocationLink Location { get; set; }
        
        public Expression<Func<RequisitionItem, int>> AutoIncrementField()
        {
            return x => x.Sequence;
        }

        public Filter<RequisitionItem> AutoIncrementFilter()
        {
            return new Filter<RequisitionItem>(x => x.RequisitionLink.ID).IsEqualTo(RequisitionLink.ID);
        }

        protected override void Init()
        {
            base.Init();
            RequisitionLink = new RequisitionLink();

            Product = new ProductLink(() => this);
            
            Holding = new StockHoldingLink();
            Location = new StockLocationLink();

            Style = new ProductStyleLink();
            
            //StockMovement = new StockMovementLink();
        }

        static RequisitionItem()
        {
            LinkedProperties.Register<RequisitionItem, ProductLink, String>(x => x.Product, x => x.Code, x => x.Code);
            LinkedProperties.Register<RequisitionItem, ProductLink, String>(x => x.Product, x => x.Name, x => x.Description);
            LinkedProperties.Register<RequisitionItem, ProductStyleLink, Guid>(x=>x.Product.DefaultStyle, x => x.ID, x => x.Style.ID);
        }
    }
}