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

namespace Comal.Classes
{
    public enum StockMovementBatchType
    {
        Stocktake,
        Receipt,
        Issue,
        Transfer
    }

    public class StockMovementBatchDocumentCount : CoreAggregate<StockMovementBatch, StockMovementBatchDocument, Guid>
    {
        public override Expression<Func<StockMovementBatchDocument, Guid>> Aggregate => x => x.ID;

        public override AggregateCalculation Calculation => AggregateCalculation.Count;

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

    public interface IStockMovementBatch : IEntity
    {
    }

    [UserTracking(typeof(StockMovement))]
    public class StockMovementBatch : Entity, IRemotable, IPersistent, IStockMovementBatch, ILicense<WarehouseLicense>
    {
        [EnumLookupEditor(typeof(StockMovementBatchType))]
        [EditorSequence(1)]
        public StockMovementBatchType Type { get; set; }

        [TimestampEditor]
        [EditorSequence(2)]
        public DateTime TimeStamp { get; set; }

        [EditorSequence(3)]
        public EmployeeLink Employee { get; set; }

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

        [Aggregate(typeof(StockMovementBatchDocumentCount))]
        [NullEditor]
        public int Documents { get; set; }

        public RequisitionLink Requisition { get; set; }
    }

    public class StockMovementBatchLink : EntityLink<StockMovementBatch>, IStockMovementBatch
    {
        [EnumLookupEditor(typeof(StockMovementBatchType), Visible = Visible.Optional, Editable = Editable.Hidden)]
        public StockMovementBatchType Type { get; set; }

        [MemoEditor(Visible = Visible.Optional, Editable = Editable.Hidden)]
        public string Notes { get; set; }

        [NullEditor]
        public int Documents { get; set; }

        [NullEditor]
        public override Guid ID { get; set; }
    }

    [UserTracking(typeof(StockMovement))]
    public class StockMovementBatchDocument : EntityDocument<StockMovementBatchLink>, ILicense<WarehouseLicense>, IManyToMany<StockMovementBatch,Document>
    {
    }
}