using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows;
using Comal.Classes;
using InABox.Clients;
using InABox.Core;
using InABox.DynamicGrid;
using InABox.WPF;
using Microsoft.Office.Interop.Outlook;
using Exception = System.Exception;

namespace PRSDesktop
{
    public class RequisitionItemGrid : DynamicDataGrid<RequisitionItem>
    {
        //public int Boxes { get; set; }

        public RequisitionItemGrid()
        {
            Options.BeginUpdate()
                .Add(DynamicGridOption.RecordCount)
                .Add(DynamicGridOption.SelectColumns)
                .Add(DynamicGridOption.AddRows)
                .Add(DynamicGridOption.EditRows)
                .Add(DynamicGridOption.DeleteRows)
                .Add(DynamicGridOption.FilterRows)
                .Add(DynamicGridOption.MultiSelect)
                .EndUpdate();
            HiddenColumns.Add(x => x.Code);
            HiddenColumns.Add(x => x.BarCode);
            HiddenColumns.Add(x => x.RequisitionLink.JobLink.ID);
            HiddenColumns.Add(x => x.RequisitionLink.ID);
            HiddenColumns.Add(x => x.RequisitionLink.Filled);
            HiddenColumns.Add(x => x.RequisitionLink.Archived);
            HiddenColumns.Add(x => x.Product.ID);
            HiddenColumns.Add(x => x.Product.Deleted);
            HiddenColumns.Add(x => x.Product.DefaultStyle.ID);
            HiddenColumns.Add(x => x.Product.Dimensions.Unit.ID);
            HiddenColumns.Add(x => x.Product.Dimensions.Length);
            HiddenColumns.Add(x => x.Product.Dimensions.Width);
            HiddenColumns.Add(x => x.Product.Dimensions.Height);
            HiddenColumns.Add(x => x.Product.Dimensions.Weight);
            HiddenColumns.Add(x => x.Product.Dimensions.UnitSize);
            HiddenColumns.Add(x => x.Product.Dimensions.Value);
            HiddenColumns.Add(x => x.Product.Dimensions.Unit.HasQuantity); 
            HiddenColumns.Add(x => x.Product.Dimensions.Unit.HasLength);
            HiddenColumns.Add(x => x.Product.Dimensions.Unit.HasWidth);
            HiddenColumns.Add(x => x.Product.Dimensions.Unit.HasWeight);
            HiddenColumns.Add(x => x.Product.Dimensions.Unit.HasHeight);
            HiddenColumns.Add(x => x.Product.Dimensions.Unit.Formula);
            HiddenColumns.Add(x => x.Product.Dimensions.Unit.Format);
            //HiddenColumns.Add(x => x.Product.Units.ID);
            HiddenColumns.Add(x => x.Product.NonStock);
            HiddenColumns.Add(x => x.Location.ID);
            HiddenColumns.Add(x => x.Location.Code);
            HiddenColumns.Add(x => x.Location.Description);
            HiddenColumns.Add(x => x.Location.Deleted);
            HiddenColumns.Add(x => x.Style.ID);
            HiddenColumns.Add(x => x.Style.Code);
            HiddenColumns.Add(x => x.Picked);
            ActionColumns.Add(new DynamicMenuColumn(SelectHolding,
                (row) => (row.Get<RequisitionItem,Guid>(c=>c.Product.ID) == Guid.Empty) || row.Get<RequisitionItem, bool>(c => c.Product.NonStock) == true
                    ? DynamicMenuStatus.Hidden 
                    : DynamicMenuStatus.Enabled)
            );
        }

        private void SelectHolding(DynamicMenuColumn column, CoreRow? row)
        {
            using (new WaitCursor())
            {
                var holdings = new Client<StockHolding>().Query(
                    new Filter<StockHolding>(x => x.Product.ID).IsEqualTo(row.Get<RequisitionItem, Guid>(c => c.Product.ID)),
                    new Columns<StockHolding>(x => x.Location.ID)
                        .Add(x => x.Location.Code)
                        .Add(x => x.Style.ID)
                        .Add(x => x.Style.Code)
                        .Add(x => x.Job.ID)
                        .Add(x => x.Job.JobNumber)
                        .Add(x => x.Dimensions.Unit.ID)
                        .Add(x => x.Dimensions.Length)
                        .Add(x => x.Dimensions.Width)
                        .Add(x => x.Dimensions.Height)
                        .Add(x => x.Dimensions.Weight)
                        .Add(x => x.Dimensions.UnitSize)
                        .Add(x => x.Dimensions.Value)
                        .Add(x => x.Dimensions.Unit.HasQuantity)
                        .Add(x => x.Dimensions.Unit.HasLength)
                        .Add(x => x.Dimensions.Unit.HasWidth)
                        .Add(x => x.Dimensions.Unit.HasWeight)
                        .Add(x => x.Dimensions.Unit.HasHeight)
                        .Add(x => x.Dimensions.Unit.Formula)
                        .Add(x => x.Dimensions.Unit.Format)
                        .Add(x => x.Units),
                    new SortOrder<StockHolding>(x => x.Location.Code).ThenBy(x => x.Style.Code).ThenBy(x => x.Dimensions.UnitSize)
                );

                foreach (var holding in holdings.Rows)
                {
                    String text =
                        $"{holding.Get<StockHolding, String>(c => c.Location.Code)}: {holding.Get<StockHolding, double>(c => c.Units)} @ {holding.Get<StockHolding, String>(c => c.Dimensions.UnitSize)}";
                    String style = holding.Get<StockHolding, String>(c => c.Style.Code);
                    if (!String.IsNullOrWhiteSpace(style))
                        text = $"{text} ({style})";
                    column.AddItem(text, null, (sel) => SelectLocation(holding,sel));
                }
            }
            
        }

        private void SelectLocation(CoreRow holdingrow, CoreRow itemrow)
        {
            var item = itemrow.ToObject<RequisitionItem>();
            var holding = holdingrow.ToObject<StockHolding>();
            item.Location.ID = holding.Location.ID;
            item.Location.Code = holding.Location.Code;
            item.Dimensions.CopyFrom(holding.Dimensions, true);
            item.Style.ID = holding.Style.ID;
            item.Style.Code = holding.Style.Code;
            new Client<RequisitionItem>().Save(item, "Changed due to stock holding selection");
            Data.LoadRow(itemrow, item);
            InvalidateRow(itemrow);
        }


        public Requisition Requisition { get; set; }

        protected override void Reload(Filters<RequisitionItem> criteria, Columns<RequisitionItem> columns, ref SortOrder<RequisitionItem>? sort,
            Action<CoreTable?, Exception?> action)
        {
            criteria.Add(
                new Filter<RequisitionItem>(x => x.RequisitionLink.ID).IsEqualTo(Requisition != null ? Requisition.ID : CoreUtils.FullGuid));
            sort = new SortOrder<RequisitionItem>(x => x.Created);

            base.Reload(
                criteria,
                columns,
                ref sort,
                (o, e) =>
                {
                    // Update Buttons Here
                    action.Invoke(o, e);
                }
            );
        }

        protected override bool CanDeleteItems(CoreRow[] rows)
        {
            if (Requisition == null || Requisition.ID.Equals(Guid.Empty))
            {
                MessageBox.Show("Please select a Requisition first!");
                return false;
            }

            if (!Requisition.Filled.IsEmpty())
            {
                MessageBox.Show("Cannot Modify a Completed Requisition");
                return false;
            }

            return base.CanDeleteItems(rows);
        }

        public override bool EditItems(RequisitionItem[] items, Func<Type, CoreTable>? PageDataHandler, bool PreloadPages = false)
        {
            if (Requisition == null || Requisition.ID.Equals(Guid.Empty))
            {
                MessageBox.Show("Please select a Requisition first!");
                return false;
            }

            if (!Requisition.StockUpdated.IsEmpty())
            {
                MessageBox.Show("Cannot Edit Items after Stock Holdings have been updated!");
                return false;
            }

            return base.EditItems(items, PageDataHandler, PreloadPages);
        }

        protected override RequisitionItem CreateItem()
        {
            var item = base.CreateItem();
            item.RequisitionLink.ID = Requisition.ID;
            item.RequisitionLink.Synchronise(Requisition);
            item.Quantity = 1;
            return item;
        }

        protected override void DoAdd()
        {
            if (Requisition == null || Requisition.ID.Equals(Guid.Empty))
            {
                MessageBox.Show("Please select a Requisition first!");
                return;
            }

            if (!Requisition.Filled.IsEmpty())
            {
                MessageBox.Show("Cannot Add Items to a Completed Requisition");
                return;
            }

            base.DoAdd();

        }
        
        
    }
}