using Comal.Classes;
using InABox.Clients;
using InABox.Core;
using InABox.DynamicGrid;
using InABox.WPF;
using jdk.nashorn.@internal.ir.debug;
using NPOI.SS.Formula.Functions;
using org.omg.PortableInterceptor;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;

namespace PRSDesktop
{
    public delegate void StockReserved();
    public class JobRequiItemAvailableStockGrid : DynamicDataGrid<StockHolding>
    {
        public event StockReserved OnStockReserved;
        public Guid ProductID = Guid.Empty;
        public JobRequisitionItem Item = new JobRequisitionItem();
        public Guid empID = new Guid();

        public JobRequiItemAvailableStockGrid()
        {
            Options.AddRange(
                 DynamicGridOption.SelectColumns,
                 DynamicGridOption.FilterRows,
                 DynamicGridOption.RecordCount,
                 DynamicGridOption.EditRows
             );
            HiddenColumns.Add(x => x.Qty);
            AddButton("Reserve For Job", null, ReserveStock);
        }

        private bool ReserveStock(Button btn, CoreRow[] rows)
        {
            if (!rows.Any())
            {
                MessageBox.Show("Please select at least one holding to reserve");
                return false;
            }

            var holding = rows[0].ToObject<StockHolding>();
            int units = 0;

            if (Item.Qty <= holding.Units)
                units = Convert.ToInt32(Item.Qty);
            else
                units = Convert.ToInt32(holding.Units);

            if (NumberEdit.Execute("Enter amount to reserve", 1, units, ref units))
            {
                StockMovementBatch batch = new StockMovementBatch();
                batch.Type = StockMovementBatchType.Transfer;
                batch.Notes = "Reserving Stock for Requi: " + Item.Requisition.Number;

                new Client<StockMovementBatch>().Save(batch, "Created from Job Requi Item Reserve Stock Function");
                List<StockMovement> movements = new List<StockMovement>
                {
                    CreateMovement(StockMovementType.Issue, units, holding, batch),
                    CreateMovement(StockMovementType.Receive, units, holding, batch)
                };

                new Client<StockMovement>().Save(movements, "Created from Job Requi Item Reserve Stock Function");

                Item.Status = JobRequisitionItemStatus.Reserved;

                new Client<JobRequisitionItem>().Save(Item, "Updated from Job Requi Item Reserve Stock Function");
               
                MessageBox.Show("Success - " + Item.Product.Name + " stock reserved for Requisition " + Item.Requisition.Number);

                OnStockReserved?.Invoke();
            }

            return true;
        }

        enum StockMovementType 
        {
            Issue,
            Receive
        }

        private StockMovement CreateMovement(StockMovementType type, double units, StockHolding holding, StockMovementBatch batch)
        {
            StockMovement mvt = new StockMovement();
            mvt.System = true;
            mvt.Batch.ID = batch.ID;
            mvt.Batch.Type = StockMovementBatchType.Transfer;         
            mvt.Dimensions.CopyFrom(holding.Dimensions);
            mvt.Style.ID = holding.Style.ID;
            mvt.Location.ID = holding.Location.ID;
            mvt.Product.ID = holding.Product.ID;
            mvt.Date = DateTime.Now;
            mvt.IsTransfer = true;
            mvt.Notes = "Reserving Stock for Requi: " + Item.Requisition.Number;
            mvt.JobRequisitionItem.ID = Item.ID;
            mvt.Employee.ID = empID;

            if (type == StockMovementType.Issue)
            {
                mvt.Issued = units;
                mvt.Job.ID = holding.Job.ID;
            }
            else
            {
                mvt.Received = units;
                mvt.Job.ID = Item.Job.ID;
            }
                
            return mvt;
        }

        

        protected override void Reload(Filters<StockHolding> criteria, Columns<StockHolding> columns, ref SortOrder<StockHolding> sort, Action<CoreTable, Exception> action)
        {
            if (ProductID != Guid.Empty)
                criteria.Add(new Filter<StockHolding>(x => x.Product.ID).IsEqualTo(ProductID));
            else
                criteria.Add(new Filter<StockHolding>().None());

            base.Reload(criteria, columns, ref sort, action);
        }

        protected override bool FilterRecord(CoreRow row)
        {
            var result = base.FilterRecord(row);
            if (result)
            {
                var qty = row.Get<StockHolding, double>(x => x.Qty);
                var iszero = CoreUtils.IsEffectivelyEqual(qty, 0.0F);
                result = !iszero;
            }

            return result;
        }
    }
}