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

namespace Comal.Classes
{
    public class DeliveryItemDocumentCount : CoreAggregate<DeliveryItem, DeliveryDocument, Guid>
    {
        public override Expression<Func<DeliveryDocument, Guid>> Aggregate => x => x.ID;

        public override AggregateCalculation Calculation => AggregateCalculation.Count;

        public override Dictionary<Expression<Func<DeliveryDocument, object>>, Expression<Func<DeliveryItem, object>>> Links =>
            new Dictionary<Expression<Func<DeliveryDocument, object>>, Expression<Func<DeliveryItem, object>>>()
            {
                { DeliveryDocument => DeliveryDocument.EntityLink.ID, DeliveryItem => DeliveryItem.Delivery.ID }
            };
    }

    public class DeliveryItemArea : IFormula<DeliveryItem, double>
    {
        public Expression<Func<DeliveryItem, double>> Value => x => x.Height;
        public Expression<Func<DeliveryItem, double>>[] Modifiers => new Expression<Func<DeliveryItem, double>>[] { x => x.Width, x => 0.000001F };
        public FormulaOperator Operator => FormulaOperator.Multiply;
        public FormulaType Type => FormulaType.Virtual;
    }

    public class DeliveryItemVolume : IFormula<DeliveryItem, double>
    {
        public Expression<Func<DeliveryItem, double>> Value => x => x.Height;
        public Expression<Func<DeliveryItem, double>>[] Modifiers => new Expression<Func<DeliveryItem, double>>[] { x => x.Width, x => x.Length };
        public FormulaOperator Operator => FormulaOperator.Multiply;
        public FormulaType Type => FormulaType.Virtual;
    }

    public enum DeliveryItemType
    {
        ManufacturedItem,
        RequisitionItem,
        TreatmentItem,
        EquipmentItem,
        OtherItem
    }

    [UserTracking(typeof(Delivery))]
    [Caption("Delivery Items")]
    public class DeliveryItem : Entity, IPersistent, IRemotable, IOneToMany<Job>, IOneToMany<Delivery>,
        IOneToMany<ManufacturingPacket>, IOneToMany<Shipment>, ILicense<LogisticsLicense>, IExportable
    {
        // If Packet then Packet.Title
        // If requisition then Requisition.Title
        public string Title { get; set; }

        // if PAcket, then Packet.Description
        // If Requitision then BOX X OF Y
        [TextBoxEditor]
        public string Description { get; set; } = "";

        // If Packet, then Packet.Refreence
        // If Requisition then Requi.Employee
        [TextBoxEditor]
        public string Reference { get; set; }

        [TextBoxEditor(Editable = Editable.Hidden)]
        [SecondaryIndex]
        public string Barcode { get; set; }

        public int Sequence { get; set; }

        public string Piece { get; set; }

        [SecondaryIndex]
        public DateTime DeliveredDate { get; set; }

        public DateTime InstalledDate { get; set; }

        public DateTime DueDate { get; set; }

        public JobLink JobLink { get; set; }

        private class ManufacturingPacketLookup : LookupDefinitionGenerator<ManufacturingPacket, DeliveryItem>
        {
            // Overriding the default ManufacturingPacket lookup to have no restrictions.
            public override Filter<ManufacturingPacket> DefineFilter(DeliveryItem[] items)
            {
                return new Filter<ManufacturingPacket>().All();
            }
        }
        [LookupDefinition(typeof(ManufacturingPacketLookup))]
        [EntityRelationship(DeleteAction.Cascade)]
        public ManufacturingPacketLink ManufacturingPacketLink { get; set; }

        public RequisitionLink RequisitionLink { get; set; }

        public SetoutLink SetoutLink { get; set; }

        public ShipmentLink ShipmentLink { get; set; }

        [CodeEditor(Editable = Editable.Disabled)]
        public string ShipmentCode { get; set; }
        
        //public PackableList<CoreAttribute> CustomAttributes { get; set; }

        [MemoEditor]
        public string Attributes { get; set; } = "";

        public Location Location { get; set; }

        public DeliveryLink Delivery { get; set; }

        public PurchaseOrderItemLink OrderItem { get; set; }

        public double Cost { get; set; }

        public double Height { get; set; }

        public double Width { get; set; }

        public double Length { get; set; }

        [DoubleEditor(Editable = Editable.Hidden)]
        [Formula(typeof(DeliveryItemArea))]
        public double Area { get; set; }

        [DoubleEditor(Editable = Editable.Hidden)]
        [Formula(typeof(DeliveryItemVolume))]
        public double Volume { get; set; }

        [Aggregate(typeof(DeliveryItemDocumentCount))]
        [IntegerEditor(Editable = Editable.Hidden)]
        public int Documents { get; set; }

        [EnumLookupEditor(typeof(DeliveryItemType))]
        public DeliveryItemType Type { get; set; } = DeliveryItemType.OtherItem;


        public override string ToString()
        {
            return string.Format("{0} : {1}", Barcode, Title);
        }

        static DeliveryItem()
        {
            LinkedProperties.Register<DeliveryItem, ShipmentLink, String>(x=>x.ShipmentLink, x => x.Code, x => x.ShipmentCode);
        }
    }
}