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

namespace Comal.Classes
{
    public class PurchaseOrderItemFormCount : CoreAggregate<PurchaseOrderItem, PurchaseOrderItemForm, Guid>
    {
        public override Expression<Func<PurchaseOrderItemForm, Guid>> Aggregate => x => x.ID;

        public override AggregateCalculation Calculation => AggregateCalculation.Count;

        public override Dictionary<Expression<Func<PurchaseOrderItemForm, object>>, Expression<Func<PurchaseOrderItem, object>>> Links =>
            new Dictionary<Expression<Func<PurchaseOrderItemForm, object>>, Expression<Func<PurchaseOrderItem, object>>>()
            {
                { PurchaseOrderItemForm => PurchaseOrderItemForm.Parent.ID, PurchaseOrderItem => PurchaseOrderItem.ID }
            };
    }

    public class PurchaseOrderItemOpenForms : CoreAggregate<PurchaseOrderItem, PurchaseOrderItemForm, Guid>
    {
        public override Expression<Func<PurchaseOrderItemForm, Guid>> Aggregate => x => x.ID;

        public override AggregateCalculation Calculation => AggregateCalculation.Count;

        public override Dictionary<Expression<Func<PurchaseOrderItemForm, object>>, Expression<Func<PurchaseOrderItem, object>>> Links =>
            new Dictionary<Expression<Func<PurchaseOrderItemForm, object>>, Expression<Func<PurchaseOrderItem, object>>>()
            {
                { PurchaseOrderItemForm => PurchaseOrderItemForm.Parent.ID, PurchaseOrderItem => PurchaseOrderItem.ID }
            };

        public override Filter<PurchaseOrderItemForm> Filter => new Filter<PurchaseOrderItemForm>(x => x.FormCompleted).IsEqualTo(DateTime.MinValue)
            .Or(x => x.FormData).IsEqualTo("");
    }

    [UserTracking(typeof(Bill))]
    [Caption("Purchase Order Items")]
    public class PurchaseOrderItem : StockEntity, IRemotable, IPersistent, IOneToMany<PurchaseOrder>, ITaxable, IOneToMany<Consignment>, IOneToMany<Job>,
        ILicense<AccountsPayableLicense>, IJobMaterial, IPostableFragment<PurchaseOrder>
    {
        [EntityRelationship(DeleteAction.SetNull)]
        [NullEditor]
        [Obsolete("Replaced with Product", true)]
        public ProductLink ProductLink
        {
            get { return Product; }
            set { Product = value; }
        }

        [EntityRelationship(DeleteAction.SetNull)]
        [EditorSequence(1)]
        [RequiredColumn]
        public override ProductLink Product { get; set; }

        [EntityRelationship(DeleteAction.SetNull)]
        [NullEditor]
        [Obsolete("Replaced with Style", true)]
        public ProductStyleLink StyleLink
        {
            get { return Style; }
            set { Style = value; }
        }

        [EntityRelationship(DeleteAction.SetNull)]
        [EditorSequence(2)]
        public ProductStyleLink Style { get; set; }

        [EntityRelationship(DeleteAction.SetNull)]
        [EditorSequence(3)]
        public JobLink Job { get; set; }

        [MemoEditor(Visible = Visible.Default)]
        [EditorSequence(4)]
        public string Description { get; set; }

        [CodeEditor(Visible = Visible.Default, Editable = Editable.Enabled)]
        [EditorSequence(5)]
        public string SupplierCode { get; set; }

        [DoubleEditor(Visible = Visible.Default)]
        [EditorSequence(6)]
        public double Qty { get; set; } = 1;

        [NullEditor]
        [Obsolete("Replaced with Dimensions", true)]
        public double UnitSize { get; set; }

        [EditorSequence(7)]
        [RequiredColumn]
        [DimensionsEditor(typeof(StockDimensions), AllowEditingUnit = false)]
        public override StockDimensions Dimensions { get; set; }

        [CurrencyEditor(Visible = Visible.Default)]
        [EditorSequence(8)]
        public double Cost { get; set; }

        [EditorSequence(10)]
        public TaxCodeLink TaxCode { get; set; }

        [EditorSequence(11)]
        public PurchaseGLCodeLink PurchaseGL { get; set; }
        
        [EditorSequence(12)]
        public CostCentreLink CostCentre { get; set; }

        [EditorSequence(14)]
        [CurrencyEditor(Visible = Visible.Optional, Editable = Editable.Hidden, Summary = Summary.Sum)]
        public double Balance { get; set; }

        [EditorSequence(15)]
        [EntityRelationship(DeleteAction.SetNull)]
        public ConsignmentLink Consignment { get; set; }

        [DateTimeEditor(Visible = Visible.Default)]
        [EditorSequence(16)]
        public DateTime ReceivedDate { get; set; }

        [TextBoxEditor(Visible = Visible.Optional)]
        [EditorSequence(17)]
        public string ReceivedReference { get; set; }

        [EditorSequence(18)]
        [IntegerEditor(Visible = Visible.Optional)]
        public int PORevision { get; set; }

        [DateTimeEditor(Visible = Visible.Default)]
        [EditorSequence(19)]
        public DateTime DueDate { get; set; }

        [NullEditor]
        [Obsolete]
        public StockMovementLink StockMovement { get; set; }

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

        [NullEditor]
        [EntityRelationship(DeleteAction.SetNull)]
        public BillLineLink BillLine { get; set; }

        [NullEditor]
        [EntityRelationship(DeleteAction.SetNull)]
        public ManufacturingPacketLink Packet { get; set; }

        [NullEditor]
        [Aggregate(typeof(PurchaseOrderItemFormCount))]
        public int FormCount { get; set; }

        [NullEditor]
        [Aggregate(typeof(PurchaseOrderItemOpenForms))]
        public int OpenForms { get; set; }
        
        public StockLocationLink StockLocation { get; set; }

        [CurrencyEditor(Visible = Visible.Default, Summary = Summary.Sum)]
        [EditorSequence(9)]
        public double ExTax { get; set; }

        [EditorSequence(11)]
        [DoubleEditor(Visible = Visible.Default, Editable = Editable.Hidden)]
        public double TaxRate { get; set; }

        [EditorSequence(12)]
        [CurrencyEditor(Visible = Visible.Default, Summary = Summary.Sum)]
        public double Tax { get; set; }

        [EditorSequence(13)]
        [CurrencyEditor(Visible = Visible.Default, Summary = Summary.Sum)]
        public double IncTax { get; set; }

        [NullEditor]
        public string PostedReference { get; set; }

        static PurchaseOrderItem()
        {
            LinkedProperties.Register<PurchaseOrderItem, ProductLink, String>(x => x.Product, x => x.Code, x => x.SupplierCode);
            LinkedProperties.Register<PurchaseOrderItem, ProductLink, String>(x => x.Product, x => x.Name, x => x.Description);
            
            LinkedProperties.Register<PurchaseOrderItem, TaxCodeLink, Guid>(x => x.Product.TaxCode, x => x.ID, x => x.TaxCode.ID);
            LinkedProperties.Register<PurchaseOrderItem, TaxCodeLink, String>(x => x.Product.TaxCode, x => x.Code,
                x => x.TaxCode.Code);
            LinkedProperties.Register<PurchaseOrderItem, TaxCodeLink, String>(x => x.Product.TaxCode, x => x.Description,
                x => x.TaxCode.Description);
            LinkedProperties.Register<PurchaseOrderItem, TaxCodeLink, double>(x => x.Product.TaxCode, x => x.Rate,
                x => x.TaxCode.Rate);
            LinkedProperties.Register<PurchaseOrderItem, TaxCodeLink, double>(x => x.TaxCode, x => x.Rate, x => x.TaxRate);
            
            LinkedProperties.Register<PurchaseOrderItem, PurchaseGLCodeLink, Guid>(x => x.Product.PurchaseGL, x => x.ID, x => x.PurchaseGL.ID);
            LinkedProperties.Register<PurchaseOrderItem, CostCentreLink, Guid>(x => x.Product.CostCentre, x => x.ID, x => x.CostCentre.ID);
            
            LinkedProperties.Register<PurchaseOrderItem, ProductStyleLink, Guid>(x => x.Product.DefaultInstance.Style, x => x.ID, x => x.Style.ID);
            LinkedProperties.Register<PurchaseOrderItem, ProductStyleLink, String>(x => x.Product.DefaultInstance.Style, x => x.Code, x => x.Style.Code);
            LinkedProperties.Register<PurchaseOrderItem, ProductStyleLink, String>(x => x.Product.DefaultInstance.Style, x => x.Description, x => x.Style.Description);

            LinkedProperties.Register<PurchaseOrderItem, ProductInstanceLink, double>(x => x.Product.DefaultInstance, x => x.NettCost,
                x => x.Cost);

            StockEntity.LinkStockDimensions<PurchaseOrderItem>();
            
        }
        
        private bool bChanging;

        protected override void DoPropertyChanged(string name, object? before, object? after)
        {
            if (bChanging)
                return;

            try
            {
                bChanging = true;

                if (name.Equals(nameof(Qty)) && after is double qty)
                    ExTax = qty * Cost;

                else if (name.Equals(nameof(Cost)) && after is double cost)
                    ExTax = Qty * cost;
                
                else if (name.Equals(nameof(ExTax)) && after is double extax)
                {
                    if (Qty == 0)
                        Qty = 1;
                    Cost = extax / Qty;
                }

                else if (name.Equals(nameof(IncTax)) && after is double inctax)
                    Balance = ReceivedDate.IsEmpty() ? inctax : 0.00F;

                else if (name.Equals(nameof(ReceivedDate)) && after is DateTime received)
                    Balance = received.IsEmpty() ? IncTax : 0.00F;
            }
            finally
            {
                bChanging = false;
            }
            base.DoPropertyChanged(name, before, after);
        }
    }
}