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

namespace Comal.Classes
{
    [Caption("Allocation")]
    public class PurchaseOrderItemAllocation : Entity, IRemotable, IPersistent, ILicense<ProjectManagementLicense>
    , IOneToMany<JobRequisitionItem>, IOneToMany<Job>, IOneToMany<PurchaseOrderItem>
    {
        [EntityRelationship(DeleteAction.Cascade)]
        public PurchaseOrderItemLink Item { get; set; }
        
        /// <summary>
        /// This may not be blank.
        /// </summary>
        [EntityRelationship(DeleteAction.Cascade)]
        [EditorSequence(1)]
        public JobLink Job { get; set; }
        
        private class JobRequisitionItemLookup : LookupDefinitionGenerator<JobRequisitionItem, PurchaseOrderItemAllocation>
        {
            public override Columns<PurchaseOrderItemAllocation> DefineFilterColumns()
            {
                return base.DefineFilterColumns().Add(x => x.Job.ID);
            }

            public override Filter<JobRequisitionItem>? DefineFilter(PurchaseOrderItemAllocation[] items)
            {
                return new Filter<JobRequisitionItem>(x => x.Job.ID).InList(items.ToArray(x => x.Job.ID));
            }
        }
        /// <summary>
        /// This may be an empty link. The interface is as such: if there is no JRI, then we are creating a reserve and allocation just against the job. If there is a JRI,
        /// then received stock is reserved and allocated for the JRI.
        /// </summary>
        [EntityRelationship(DeleteAction.Cascade)]
        [LookupDefinition(typeof(JobRequisitionItemLookup))]
        [EditorSequence(2)]
        public JobRequisitionItemLink JobRequisitionItem { get; set; }
        
        [EditorSequence(3)]
        public double Quantity { get; set; }

        [NullEditor]
        public bool Nominated { get; set; }

        protected override void DoPropertyChanged(string name, object? before, object? after)
        {
            base.DoPropertyChanged(name, before, after);

            if(name == $"{nameof(Job)}.{nameof(Job.ID)}")
            {
                JobRequisitionItem.ID = Guid.Empty;
                JobRequisitionItem.Clear();
            }
        }
    }

    
    
    public class PurchaseOrderItemAllocationJobLink : EntityLink<PurchaseOrderItemAllocation>
    {
        [NullEditor]
        public override Guid ID { get; set; }
        
        public LightJobLink Job { get; set; }
        
        public LightPurchaseOrderItemLink Item { get; set; }
        
    }
}