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

namespace Comal.Classes
{
    public class JobMaterialBOMAggregate : CoreAggregate<JobMaterial, JobBillOfMaterialsItem, double>
    {
        public override Expression<Func<JobBillOfMaterialsItem, double>> Aggregate => x => x.Quantity;

        public override AggregateCalculation Calculation => AggregateCalculation.Sum;

        public override Dictionary<Expression<Func<JobBillOfMaterialsItem, object>>, Expression<Func<JobMaterial, object>>> Links =>
            new Dictionary<Expression<Func<JobBillOfMaterialsItem, object>>, Expression<Func<JobMaterial, object>>>()
            {
                { JobBillOfMaterialsItem => JobBillOfMaterialsItem.Job.ID, JobMaterial => JobMaterial.Job.ID },
                { JobBillOfMaterialsItem => JobBillOfMaterialsItem.Product.ID, JobMaterial => JobMaterial.Product.ID },
                { JobBillOfMaterialsItem => JobBillOfMaterialsItem.Style.ID, JobMaterial => JobMaterial.Style.ID },
                { JobBillOfMaterialsItem => JobBillOfMaterialsItem.Dimensions.UnitSize, JobMaterial => JobMaterial.Dimensions.UnitSize }
            };

        public override Filter<JobBillOfMaterialsItem> Filter =>
            new Filter<JobBillOfMaterialsItem>(x => x.BillOfMaterials.Approved).IsNotEqualTo(DateTime.MinValue);
    }
    
    public class JobMaterialRequisitionsAggregate : CoreAggregate<JobMaterial, JobRequisitionItem, double>
    {
        public override Expression<Func<JobRequisitionItem, double>> Aggregate => x => x.Qty;

        public override AggregateCalculation Calculation => AggregateCalculation.Sum;

        public override Dictionary<Expression<Func<JobRequisitionItem, object>>, Expression<Func<JobMaterial, object>>> Links =>
            new Dictionary<Expression<Func<JobRequisitionItem, object>>, Expression<Func<JobMaterial, object>>>()
            {
                { JobMaterialRequisitionItem => JobMaterialRequisitionItem.Requisition.Job.ID, JobMaterial => JobMaterial.Job.ID },
                { JobMaterialRequisitionItem => JobMaterialRequisitionItem.Product.ID, JobMaterial => JobMaterial.Product.ID },
                { JobMaterialRequisitionItem => JobMaterialRequisitionItem.Style.ID, JobMaterial => JobMaterial.Style.ID },
                { JobMaterialRequisitionItem => JobMaterialRequisitionItem.Dimensions.UnitSize, JobMaterial => JobMaterial.Dimensions.UnitSize }
            };
        
        public override Filter<JobRequisitionItem> Filter =>
            new Filter<JobRequisitionItem>(x => x.Requisition.Approved).IsNotEqualTo(DateTime.MinValue)
                .And(x=>x.Status).IsNotEqualTo(JobRequisitionItemStatus.Cancelled);

    }
    
    public class JobMaterialPickingListsAggregate : CoreAggregate<JobMaterial, RequisitionItem, double>
    {
        public override Expression<Func<RequisitionItem, double>> Aggregate => x => x.Quantity;

        public override AggregateCalculation Calculation => AggregateCalculation.Sum;

        public override Dictionary<Expression<Func<RequisitionItem, object>>, Expression<Func<JobMaterial, object>>> Links =>
            new Dictionary<Expression<Func<RequisitionItem, object>>, Expression<Func<JobMaterial, object>>>()
            {
                { RequisitionItem => RequisitionItem.RequisitionLink.JobLink.ID, JobMaterial => JobMaterial.Job.ID },
                { RequisitionItem => RequisitionItem.Product.ID, JobMaterial => JobMaterial.Product.ID },
                { RequisitionItem => RequisitionItem.Style.ID, JobMaterial => JobMaterial.Style.ID },
                { RequisitionItem => RequisitionItem.Dimensions.UnitSize, JobMaterial => JobMaterial.Dimensions.UnitSize }
            };
        
        public override Filter<RequisitionItem> Filter =>
            new Filter<RequisitionItem>(x => x.RequisitionLink.Filled).IsEqualTo(DateTime.MinValue);

    }
    
    public class JobMaterialReservedStockAggregate : CoreAggregate<JobMaterial, StockMovement, double>
    {
        public override Expression<Func<StockMovement, double>> Aggregate => x => x.Units;

        public override AggregateCalculation Calculation => AggregateCalculation.Sum;

        public override Dictionary<Expression<Func<StockMovement, object>>, Expression<Func<JobMaterial, object>>> Links =>
            new Dictionary<Expression<Func<StockMovement, object>>, Expression<Func<JobMaterial, object>>>()
            {
                { StockMovement => StockMovement.Job.ID, JobMaterial => JobMaterial.Job.ID },
                { StockMovement => StockMovement.Product.ID, JobMaterial => JobMaterial.Product.ID },
                { StockMovement => StockMovement.Style.ID, JobMaterial => JobMaterial.Style.ID },
                { StockMovement => StockMovement.Dimensions.UnitSize, JobMaterial => JobMaterial.Dimensions.UnitSize }
            };
    }

    public class JobMaterialOnOrderAggregate : CoreAggregate<JobMaterial, PurchaseOrderItem, double>
    {
        public override Expression<Func<PurchaseOrderItem, double>> Aggregate => x => x.Qty;

        public override AggregateCalculation Calculation => AggregateCalculation.Sum;

        public override Dictionary<Expression<Func<PurchaseOrderItem, object>>, Expression<Func<JobMaterial, object>>> Links =>
            new Dictionary<Expression<Func<PurchaseOrderItem, object>>, Expression<Func<JobMaterial, object>>>()
            {
                { PurchaseOrderItem => PurchaseOrderItem.Job.ID, JobMaterial => JobMaterial.Job.ID },
                { PurchaseOrderItem => PurchaseOrderItem.Product.ID, JobMaterial => JobMaterial.Product.ID },
                { PurchaseOrderItem => PurchaseOrderItem.Style.ID, JobMaterial => JobMaterial.Style.ID },
                { PurchaseOrderItem => PurchaseOrderItem.Dimensions.UnitSize, JobMaterial => JobMaterial.Dimensions.UnitSize }
            };

        public override Filter<PurchaseOrderItem> Filter => new Filter<PurchaseOrderItem>(x => x.ReceivedDate).IsEqualTo(DateTime.MinValue);
    }
    
    public class JobMaterialIssuedAggregate : CoreAggregate<JobMaterial, StockMovement, double>
    {
        public override Expression<Func<StockMovement, double>> Aggregate => x => x.Issued;

        public override Filter<StockMovement> Filter => new Filter<StockMovement>(x => x.Type).IsEqualTo(StockMovementType.Issue);

        public override AggregateCalculation Calculation => AggregateCalculation.Sum;

        public override Dictionary<Expression<Func<StockMovement, object>>, Expression<Func<JobMaterial, object>>> Links =>
            new Dictionary<Expression<Func<StockMovement, object>>, Expression<Func<JobMaterial, object>>>()
            {
                { StockMovement => StockMovement.Job.ID, JobMaterial => JobMaterial.Job.ID },
                { StockMovement => StockMovement.Product.ID, JobMaterial => JobMaterial.Product.ID },
                { StockMovement => StockMovement.Style.ID, JobMaterial => JobMaterial.Style.ID },
                { StockMovement => StockMovement.Dimensions.UnitSize, JobMaterial => JobMaterial.Dimensions.UnitSize }
            };
    }
    
    public class JobMaterialCalculatedField : IFormula<JobMaterial, double>
    {
        public Expression<Func<JobMaterial, double>> Value => x => 0.0;
        public Expression<Func<JobMaterial, double>>[] Modifiers => new Expression<Func<JobMaterial, double>>[] {  };
        public FormulaOperator Operator => FormulaOperator.Constant;
        public FormulaType Type => FormulaType.Virtual;
    }
    
    
    public class JobMaterialUnionGenerator : AutoEntityUnionGenerator<IJobMaterial>
    {
        protected override void Configure()
        {
            AddTable<StockMovement>();
            AddTable<JobBillOfMaterialsItem>();
            AddTable<JobRequisitionItem>();
            AddTable<PurchaseOrderItem>();
        }

        public override bool Distinct => true;

        public override Column<IJobMaterial>[] IDColumns => new Column<IJobMaterial>[]
        {
            new Column<IJobMaterial>(x => x.Job.ID),
            new Column<IJobMaterial>(x => x.Product.ID),
            new Column<IJobMaterial>(x => x.Style.ID),
            new Column<IJobMaterial>(x => x.Dimensions.Unit.ID),
            new Column<IJobMaterial>(x => x.Dimensions.Quantity),
            new Column<IJobMaterial>(x => x.Dimensions.Length),
            new Column<IJobMaterial>(x => x.Dimensions.Width),
            new Column<IJobMaterial>(x => x.Dimensions.Height),
            new Column<IJobMaterial>(x => x.Dimensions.Weight)
        };
    }
    
    [UserTracking(typeof(Job))]
    [AutoEntity(typeof(JobMaterialUnionGenerator))]
    public class JobMaterial : StockEntity, IJobMaterial, IJobMaterialSummary, IRemotable, IPersistent, IManyToMany<Job, Product>, ILicense<ProjectManagementLicense> /* , IDimensioned */
    {
        
        [NullEditor]
        public JobLink Job { get; set; }

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

        [EditorSequence(2)]
        public ProductStyleLink Style { get; set; }

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

        [EditorSequence(3)]
        [RequiredColumn]
        [DimensionsEditor(typeof(StockDimensions), AllowEditingUnit = false)]
        public override StockDimensions Dimensions { get; set; }
        
        [EditorSequence(4)]
        [DoubleEditor]
        [Aggregate(typeof(JobMaterialBOMAggregate))]
        public double BillOfMaterials { get; set; }

        [EditorSequence(5)]
        [DoubleEditor]
        [Aggregate(typeof(JobMaterialRequisitionsAggregate))]
        public double Requisitions { get; set; }

        
        [EditorSequence(6)]
        [DoubleEditor]
        [Aggregate(typeof(JobMaterialPickingListsAggregate))]
        public double PickingLists { get; set; }


        [EditorSequence(7)]
        [Aggregate(typeof(JobMaterialIssuedAggregate))]
        [DoubleEditor(Editable = Editable.Hidden)]
        public double Issued { get; set; }
        
        [EditorSequence(8)]
        [Aggregate(typeof(JobMaterialReservedStockAggregate))]
        [DoubleEditor(Editable = Editable.Hidden)]
        public double ReservedStock { get; set; }
        
        [EditorSequence(9)]
        [DoubleEditor]
        [Aggregate(typeof(JobMaterialOnOrderAggregate))]
        public double OnOrder { get; set; }

        [EditorSequence(10)]
        [DoubleEditor]
        [Formula(typeof(JobMaterialCalculatedField))]
        public double JobShortage { get; set; }
        
        [EditorSequence(11)]
        [DoubleEditor]
        [Formula(typeof(JobMaterialCalculatedField))]
        public double FreeOnHand { get; set; }
        
        [EditorSequence(12)]
        [DoubleEditor]
        [Formula(typeof(JobMaterialCalculatedField))]
        public double FreeOnOrder { get; set; }
        
        [EditorSequence(13)]
        [DoubleEditor]
        [Formula(typeof(JobMaterialCalculatedField))]
        public double FreeStockTotal { get; set; }
        
        [EditorSequence(14)]
        [DoubleEditor]
        [Formula(typeof(JobMaterialCalculatedField))]
        public double FreeStockShortage { get; set; }
        
    }
}