using Comal.Classes;
using InABox.Clients;
using InABox.Configuration;
using InABox.Core;
using InABox.DynamicGrid;
using InABox.Wpf;
using InABox.WPF;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using InABox.Core.Reports;
using InABox.Wpf.Reports;
using Microsoft.Xaml.Behaviors.Core;
using PRSDimensionUtils;
using Syncfusion.Data.Extensions;
using Brush = System.Windows.Media.Brush;
using Button = System.Windows.Controls.Button;
using ContextMenu = System.Windows.Controls.ContextMenu;
using MenuItem = System.Windows.Controls.MenuItem;
using FluentResults;

namespace PRSDesktop;

public delegate void JobRequiItemSelect(CoreRow[] rows);

public delegate void GridRefresh();

public class ReservationManagementItemGrid : DynamicDataGrid<JobRequisitionItem>, ISpecificGrid
{
    
    public Guid? JobID { get; set; }

    public ReservationManagementUserSettings UserSettings { get; set; }
    
    private Button CreateOrder;
    private Button ArchiveButton;
    private Button CreatePickingList;
    private Button ConsolidateHoldings;
    
    public bool ShowColors { get; set; } 
    
    public int DueDateAlert { get; set; }
    public int DueDateWarning { get; set; }
    public ProductStyleLink CompanyDefaultStyle { get; set; }

    private class UIComponent : DynamicGridGridUIComponent<JobRequisitionItem>
    {
        private ReservationManagementItemGrid Grid;

        public UIComponent(ReservationManagementItemGrid grid)
        {
            Grid = grid;
            Parent = grid;
        }

        protected override Brush? GetCellBackground(CoreRow row, DynamicColumnBase column)
        {
            if (!Grid.ShowColors) return null;

            if (column is DynamicGridColumn col)
            {
                if (String.Equals(col.ColumnName,
                        CoreUtils.GetFullPropertyName<JobRequisitionItem, DateTime>(x => x.Requisition.DueDate, ".")))
                {
                    var due = row.Get<JobRequisitionItem, DateTime>(x => x.Requisition.DueDate);
                    if (!due.IsEmpty())
                    {
                        var background = DateTime.Today > due.Date
                            ? Colors.LightSalmon
                            : DateTime.Today.AddDays(Grid.DueDateWarning) >= due.Date
                                ? Colors.Orange
                                : DateTime.Today.AddDays(Grid.DueDateAlert) >= due.Date
                                    ? Colors.LightYellow
                                    : Colors.LightGreen;
                        return new SolidColorBrush(background) { Opacity = 0.5 };
                    }
                }
            }
            else if(column is DynamicActionColumn dac)
            {
                if (dac == Grid.InStockColumn
                    || dac == Grid.OnOrderColumn)
                {
                    return Colors.LightBlue.ToBrush(0.5);
                }
                else if (dac == Grid.TreatmentRequiredColumn
                    || dac == Grid.TreatmentOnOrderColumn)
                {
                    return Colors.Plum.ToBrush(0.5);
                }
            }

            var qty = row.Get<JobRequisitionItem, double>(x => x.Qty);
            if(row.Get<JobRequisitionItem, double>(x => x.Issued) >= qty)
            {
                // Everything has been issued.
                return Colors.Silver.ToBrush(0.5);
            }
            else if(row.Get<JobRequisitionItem, double>(x => x.Allocated) + row.Get<JobRequisitionItem, double>(x => x.Issued) >= qty)
            {
                // Everything has been allocated.
                return Colors.LightGreen.ToBrush(0.5);
            }
            else if(row.Get<JobRequisitionItem, double>(x => x.InStock) + row.Get<JobRequisitionItem, double>(x => x.Issued) >= qty)
            {
                // Everything is in stock, but needs treatment
                return Colors.Orange.ToBrush(0.5);
            }
            else if(row.Get<JobRequisitionItem, double>(x => x.OnOrder)
                + row.Get<JobRequisitionItem, double>(x => x.InStock)
                + row.Get<JobRequisitionItem, double>(x => x.Issued) >= qty)
            {
                // Ordered, but not received.
                return Colors.LightYellow.ToBrush();
            }
            else
            {
                // Not enough in stock.
                return Colors.LightSalmon.ToBrush(0.5);
            }
        }
    }

    private DynamicActionColumn InStockColumn;
    private DynamicActionColumn OnOrderColumn;
    private DynamicActionColumn TreatmentRequiredColumn;
    private DynamicActionColumn TreatmentOnOrderColumn;
    private DynamicActionColumn AllocatedColumn;
    private DynamicActionColumn PickRequestedColumn;
    private DynamicActionColumn IssuedColumn;

    public ReservationManagementItemGrid()
    {
        UserSettings = new UserConfiguration<ReservationManagementUserSettings>().Load();
        FilterComponent.SetSettings(UserSettings.Filters, false);

        HiddenColumns.Add(x => x.ID);

        HiddenColumns.Add(x => x.Qty);
        HiddenColumns.Add(x => x.InStock);
        HiddenColumns.Add(x => x.OnOrder);
        HiddenColumns.Add(x => x.TreatmentOnOrder);
        HiddenColumns.Add(x => x.TreatmentRequired);
        HiddenColumns.Add(x => x.Allocated);
        HiddenColumns.Add(x => x.PickRequested);
        HiddenColumns.Add(x => x.Issued);

        HiddenColumns.Add(x => x.Product.ID);
        HiddenColumns.Add(x => x.Product.Name);
        HiddenColumns.Add(x => x.Product.Code);
        HiddenColumns.Add(x => x.Product.Group.ID);
        HiddenColumns.Add(x => x.Product.Group.Code);
        HiddenColumns.Add(x => x.Product.Group.Description);
        HiddenColumns.Add(x => x.Style.Group.ID);
        HiddenColumns.Add(x => x.Style.ID);
        HiddenColumns.Add(x => x.Style.Code);
        HiddenColumns.Add(x => x.Style.Description);
        HiddenColumns.Add(x => x.Requisition.ID);
        HiddenColumns.Add(x => x.Requisition.Job.ID);
        HiddenColumns.Add(x => x.Requisition.Job.JobNumber);
        HiddenColumns.Add(x => x.Requisition.Job.Name);
        HiddenColumns.Add(x => x.Requisition.Number);
        HiddenColumns.Add(x => x.Requisition.DueDate);
        HiddenColumns.Add(x => x.Job.ID);
        HiddenColumns.Add(x => x.Job.Name);
        HiddenColumns.Add(x => x.Job.JobNumber);
        HiddenColumns.Add(x => x.Dimensions.UnitSize);
        HiddenColumns.Add(x => x.Dimensions.Length);
        HiddenColumns.Add(x => x.Dimensions.Width);
        HiddenColumns.Add(x => x.Dimensions.Height);
        HiddenColumns.Add(x => x.Dimensions.Weight);
        HiddenColumns.Add(x => x.Dimensions.Quantity);
        HiddenColumns.Add(x => x.Dimensions.Value);
        HiddenColumns.Add(x => x.Dimensions.Unit.ID);
        HiddenColumns.Add(x => x.Dimensions.Unit.HasLength);
        HiddenColumns.Add(x => x.Dimensions.Unit.HasHeight);
        HiddenColumns.Add(x => x.Dimensions.Unit.HasWidth);
        HiddenColumns.Add(x => x.Dimensions.Unit.HasWeight);
        HiddenColumns.Add(x => x.Dimensions.Unit.HasQuantity);
        HiddenColumns.Add(x => x.Dimensions.Unit.Formula);
        HiddenColumns.Add(x => x.Dimensions.Unit.Format);
        HiddenColumns.Add(x => x.Dimensions.Unit.Code);
        HiddenColumns.Add(x => x.Dimensions.Unit.Description);
        HiddenColumns.Add(x => x.Dimensions.Unit.Conversion);
        HiddenColumns.Add(x=>x.UnitCost);

        AddDoubleColumn(x => x.Qty, "Qty.");
        InStockColumn = AddDoubleColumn(x => x.InStock, "Stk.", tooltip: "Total units currently in stock, regardless of style.");
        OnOrderColumn = AddDoubleColumn(x => x.OnOrder, "Ord.", tooltip: "Total units currently on order.");
        TreatmentRequiredColumn = AddDoubleColumn(x => x.TreatmentRequired, "Req.", tooltip: "Total units in stock needing treatment.");
        TreatmentOnOrderColumn = AddDoubleColumn(x => x.TreatmentOnOrder, "Ord.", tooltip: "Total units currently on order for treatment.");
        AllocatedColumn = AddDoubleColumn(x => x.Allocated, "Stk.", tooltip: "Total units in stock in the correct style.");
        PickRequestedColumn = AddDoubleColumn(x => x.PickRequested, "P/L.", tooltip: "Total units on picking lists.");
        IssuedColumn = AddDoubleColumn(x => x.Issued, "Iss.", tooltip: "Total units issued.");

        if (Security.CanEdit<JobRequisitionItem>())
            ActionColumns.Add(new DynamicMenuColumn(BuildMenu));

        ColumnsTag = "JobRequisitionReview";

        FilterComponent.OnFiltersSelected += GridOnFilterSelected;
        
        CreateOrder = AddButton("Orders", PRSDesktop.Resources.purchase.AsBitmapImage(), PurchaseOrder_Click);
        CreateOrder.IsEnabled = false;
        
        CreatePickingList = AddButton("Create Picking List", PRSDesktop.Resources.trolley.AsBitmapImage(), DoCreatePickingList);
        CreatePickingList.IsEnabled = false;

        ArchiveButton = AddButton("Archive", PRSDesktop.Resources.archive.AsBitmapImage(), ArchiveButton_Clicked);
        ArchiveButton.IsEnabled = false;
        
        ConsolidateHoldings = AddButton("Consolidate", PRSDesktop.Resources.product.AsBitmapImage(), ConsolidateHoldings_Clicked);
        ConsolidateHoldings.IsEnabled = false;
    }

    private bool ConsolidateHoldings_Clicked(Button button, CoreRow[] rows)
    {
        ContextMenu menu = new ContextMenu();

        menu.Items.Add( 
            new MenuItem()
            {
                Header = "Move to Location",
                Command = new ActionCommand(() =>
                {
                    MultiSelectDialog<StockLocation> dlg =
                        new MultiSelectDialog<StockLocation>(new Filter<StockLocation>(x => x.Active).IsEqualTo(true),
                            null, false);
                    if (dlg.ShowDialog() == true)
                        ConsolidateStockLocations(rows, dlg.Items().First());
                })
            }
        );

        menu.Items.Add(new Separator());
        
        menu.Items.Add( 
            new MenuItem()
            {
                Header = "Create New Location",
                Command = new ActionCommand(() =>
                {
                    var _location = new StockLocation();
                    var _grid = DynamicGridUtils.CreateDynamicGrid<StockLocation>(typeof(DynamicDataGrid<>));
                    if (_grid.EditItems( [ _location ] ))
                    {
                        ConsolidateStockLocations(rows, _location);
                    }

                })
            }
        );
        
        menu.IsOpen = true;

        return false;

    }

    private void ConsolidateStockLocations(CoreRow[] rows, StockLocation location)
    {
        Progress.ShowModal("Consolidating Items", progress =>
        {
            var _ids = rows.Select(r => r.Get<JobRequisitionItem, Guid>(x => x.ID))
                .Distinct()
                .ToArray();
            
            var _allmovements = Client.Query(
                new Filter<StockMovement>(x => x.JobRequisitionItem.ID).InList(_ids),
                Columns.None<StockMovement>()
                    .Add(x=>x.Product.ID)
                    .Add(x=>x.Style.ID)
                    .Add(x=>x.Location.ID)
                    .Add(x=>x.Job.ID)
                    .Add(x=>x.Units)
                    .Add(x=>x.Cost)
                    .Add(x=>x.JobRequisitionItem.ID)
                    .AddDimensionsColumns(x=>x.Dimensions)
            );
            
            if (_allmovements.Rows.Any())
            {

                progress.Report("Creating Batch");
                var _batch = new StockMovementBatch();
                _batch.TimeStamp = DateTime.Now;
                _batch.Type = StockMovementBatchType.Transfer;
                _batch.Employee.ID = App.EmployeeID;
                Client.Save(_batch, "Consolidating requisition items into single location");
                
                progress.Report("Creating Transactions");
                List<StockMovement> _updates = new();
                foreach (var _id in _ids)
                {
                    var _movements = _allmovements.Rows
                        .Where(r => r.Get<StockMovement,Guid>(x=>x.JobRequisitionItem.ID) == _id)
                        .ToObjects<StockMovement>()
                        .ToArray();

                    var _holdings = StockHoldingExtensions.GroupMovements(_movements).ToArray();
                    foreach (var _holding in _holdings)
                    {
                        var _transout = _holding.CreateMovement();
                        _transout.Employee.ID = _batch.Employee.ID;
                        _transout.Issued = _holding.Units;
                        _transout.Cost = _holding.AverageValue;
                        _transout.Type = StockMovementType.TransferOut;
                        _transout.JobRequisitionItem.ID = _id;
                        _transout.Batch.ID = _batch.ID;
                        _transout.Notes = $"Consolidating requisition item holdings from {_holding.Location.Code} to {location.Code}";
                        _updates.Add(_transout);

                        var _transin = _holding.CreateMovement();
                        _transin.Date = _transout.Date.AddTicks(1);
                        _transin.Employee.ID = _batch.Employee.ID;
                        _transin.Location.ID = location.ID;
                        _transin.Received = _holding.Units;
                        _transin.Cost = _holding.AverageValue;
                        _transin.Type = StockMovementType.TransferIn;
                        _transin.Transaction = _transout.Transaction;
                        _transin.JobRequisitionItem.ID = _id;
                        _transin.Batch.ID = _batch.ID;
                        _transin.Notes = $"Consolidating requisition item holdings from {_holding.Location.Code} to {location.Code}";
                        _updates.Add(_transin);
                    }
                    
                }
                Client.Save(_updates,$"Consolidated requisition item holdings to {location.Code}");
            }
        });

    }

    #region CreatePurchaseOrder

    private bool PurchaseOrder_Click(Button button, CoreRow[] rows)
    {
        if(rows.Length == 0)
        {
            return false;
        }

        var menu = new ContextMenu();
        menu.AddItem("Create Purchase Order", null, rows, CreatePurchaseOrder);
        menu.AddItem("Add to Existing Order", null, rows, AddToExistingOrder);
        menu.IsOpen = true;

        return false;

    }

    private void CreatePurchaseOrder(CoreRow[] rows)
    {
        var mr = MessageWindow.ShowYesNoCancel("Include Style in Order?", "Confirm");
        if (mr == MessageWindowResult.Cancel)
            return;
        
        var items = new List<StockForecastOrderData>();
        foreach(var row in rows)
        {
            var jri = row.ToObject<JobRequisitionItem>();
            if (mr != MessageWindowResult.Yes)
            {
                jri.Style.CopyFrom(new ProductStyle());
            }

            var qtyRequired = DimensionUtils.ConvertDimensions(jri.Dimensions, Math.Max(jri.Qty - jri.InStock - jri.OnOrder, 0.0), (f,c) => Client.Query(f,c));

            var item = items.FirstOrDefault(x =>
                x.Product.ID == jri.Product.ID
                && x.Style.ID == jri.Style.ID
                && x.Dimensions.Equals(jri.Dimensions)
            );
            if (item == null)
            {
                item = new StockForecastOrderData(jri.Product, jri.Style, jri.Dimensions);
                items.Add(item);
            }

            item.RequiredQuantity += qtyRequired;
            item.SetRequiredQuantity(jri.Job.ID, jri.ID, $"{jri.Job.JobNumber}-{jri.Requisition.Number}", qtyRequired);
        }

        var window = new StockForecastOrderScreen(items, false) { Owner = Application.Current.MainWindow };
        if (window.ShowDialog() == true)
        {
            window.CreateOrders("Reservation Management");
            Refresh(false, true);
        }
    }

    Window? PurchasingWindow;

    private void AddToExistingOrder(CoreRow[] rows)
    {
        var dlg = new MultiSelectDialog<PurchaseOrder>(
            new Filter<PurchaseOrder>(x => x.ClosedDate).IsEqualTo(DateTime.MinValue),
            Columns.None<PurchaseOrder>().Add(x => x.ID),
            false);
        if (dlg.ShowDialog())
        {
            var id = dlg.IDs().First();

            var jris = rows.ToArray<JobRequisitionItem>();

            var pois = new List<(PurchaseOrderItem poi, PurchaseOrderItemAllocation poia)>();

            foreach (var jri in jris)
            {
                var poItem = new PurchaseOrderItem
                {
                    Description = jri.Product.Name,
                    Qty = Math.Max(jri.Qty - (jri.InStock + jri.Issued), 0.0)
                };
                poItem.Product.ID = jri.Product.ID;
                poItem.Product.Synchronise(jri.Product);
                poItem.Dimensions.CopyFrom(jri.Dimensions);
                poItem.Style.ID = jri.Style.ID;
                poItem.Style.Synchronise(jri.Style);
                poItem.PurchaseOrderLink.ID = id;

                var allocation = new PurchaseOrderItemAllocation();
                allocation.Job.CopyFrom(jri.Job);
                allocation.JobRequisitionItem.CopyFrom(jri);
                allocation.Quantity = poItem.Qty;

                pois.Add((poItem, allocation));
            }

            Client.Save(pois.Select(x => x.poi), "Created from Reservation Management Screen");

            foreach(var (poi, poia) in pois)
            {
                poia.Item.CopyFrom(poi);
            }
            Client.Save(pois.Select(x => x.poia), "Created from Reservation Management Screen");

            ViewPurchaseOrder(id);
        }
    }

    #endregion

    #region CreatePickingList

    private bool DoCreatePickingList(Button button, CoreRow[] rows)
    {
        if (rows.Length == 0)
            return false;

        if (rows.All(r => r.Get<JobRequisitionItem, double>(x => x.PickRequested).IsEffectivelyEqual(r.Get<JobRequisitionItem, double>(x => x.Qty))))
        {
            MessageWindow.ShowMessage("All Items have been picked!", "Error", image: MessageWindow.WarningImage);
            return false;
        }
        
        var _jris = rows.ToObjects<JobRequisitionItem>()
            .GroupBy(x=>new Tuple<Guid,String,String>(x.Requisition.Job.ID, x.Requisition.Job.JobNumber, x.Requisition.Job.Name))
            .ToArray();
        
        List<Requisition> _pls = new List<Requisition>();

        Progress.ShowModal("Creating Picking Lists", progress =>
        {
            Task<StockMovement[]> _movementquery = Task.Run(
                () => Client.Query(
                    new Filter<StockMovement>(x => x.JobRequisitionItem.ID)
                        .InList(rows.Select(r => r.Get<JobRequisitionItem,Guid>(c=>c.ID)).ToArray())
                    ).ToObjects<StockMovement>()
                    .ToArray()
                );
            
            foreach (var _job in _jris)
            {
                var _pl = new Requisition();
                _pl.JobLink.ID = _job.Key.Item1;
                _pl.JobLink.JobNumber = _job.Key.Item2;
                _pl.JobLink.Name = _job.Key.Item3;
                _pl.RequestedBy.ID = App.EmployeeID;
                _pl.Notes = new string[] { $"Items requested by {App.EmployeeName}" };
                _pls.Add(_pl);
            }
            Client.Save(_pls, "Created from Reservation Management Screen");

            progress.Report("Retrieving Allocations");
            _movementquery.Wait();

            progress.Report("Creating Picking List Items");
            List<RequisitionItem> _plitems = new List<RequisitionItem>();
            foreach (var _pl in _pls)
            {
                var _pljris = _jris.First(x => x.Key.Item1 == _pl.JobLink.ID);
                foreach (var _pljri in _pljris)
                {
                    double qtyrequired = _pljri.Qty;
                    double unitCost = _pljri.UnitCost;
                    var dimensions = _pljri.Dimensions.Copy();
                    if (!String.IsNullOrWhiteSpace(_pljri.Dimensions.Unit.Conversion))
                    {
                        var qty = DimensionUtils.ConvertDimensions(dimensions, _pljri.Qty, Client<ProductDimensionUnit>.Provider);
                        if (!qty.IsEffectivelyEqual(_pljri.Qty))
                        {
                            unitCost = _pljri.UnitCost * _pljri.Qty / (qty.IsEffectivelyEqual(0.0) ? 1.0 : qty);
                            qtyrequired = qty;
                        }
                    }
                    var _locations = _movementquery.Result.Where(x => x.JobRequisitionItem.ID == _pljri.ID)
                        .GroupBy(x => x.Location.ID);
                    foreach (var _location in _locations)
                    {
                        if (!qtyrequired.IsEffectivelyEqual(0.0))
                        {
                            var _plitem = new RequisitionItem();
                            _plitem.RequisitionLink.CopyFrom(_pl);
                            _plitem.JobRequisitionItem.CopyFrom(_pljri);
                            _plitem.SourceJRI.CopyFrom(_pljri);
                            _plitem.Product.CopyFrom(_pljri.Product);
                            _plitem.Style.CopyFrom(_pljri.Style);
                            _plitem.Dimensions.CopyFrom(dimensions);
                            _plitem.Location.ID = _location.Key;
                            _plitem.Quantity = Math.Min(qtyrequired, _location.Sum(x => x.Units));
                            _plitem.ActualQuantity = _plitem.Quantity;
                            _plitem.Cost = unitCost;
                            qtyrequired -= qtyrequired;
                            _plitems.Add(_plitem);
                        }
                    }

                    if (!qtyrequired.IsEffectivelyEqual(0.0))
                    {
                        var _plitem = new RequisitionItem();
                        _plitem.RequisitionLink.CopyFrom(_pl);
                        _plitem.JobRequisitionItem.CopyFrom(_pljri);
                        _plitem.Product.CopyFrom(_pljri.Product);
                        _plitem.Style.CopyFrom(_pljri.Style);
                        _plitem.Dimensions.CopyFrom(dimensions);
                        _plitem.Quantity = qtyrequired;
                        _plitem.Cost = unitCost;
                        _plitems.Add(_plitem);
                    }


                }
            }
            Client.Save(_plitems,"Created from Reservation Management Screen");
            
        });
        
        MessageWindow.ShowMessage(
            $"Created the following Picking Lists:\n- {string.Join("\n- ",_pls.Select(x=>$"{x.Number}: {x.JobLink.JobNumber} {x.JobLink.Name}"))}",
            "Picking Lists Created");

        return true;
    }
    
    #endregion

    private DynamicActionColumn AddDoubleColumn(Expression<Func<JobRequisitionItem, object>> property, string header, string? tooltip = null)
    {
        var col = new DynamicTextColumn<JobRequisitionItem>(property)
        {
            Format = "F2",
            HeaderText = header,
            Width = 50,
        };
        if(tooltip != null)
        {
            col.ToolTip = (c, r) =>
            {
                return c.TextToolTip(tooltip);
            };
        }
        ActionColumns.Add(col);
        return col;
    }

    protected override IDynamicGridUIComponent<JobRequisitionItem> CreateUIComponent()
    {
        return new UIComponent(this);
    }

    protected override void DoReconfigure(DynamicGridOptions options)
    {
        base.DoReconfigure(options);

        options.FilterRows = true;
        options.SelectColumns = true;
        options.RecordCount = true;
        options.AddRows = false;
        options.ImportData = false;
        options.ExportData = false;
        options.Print = false;
        options.ShowHelp = false;
        options.MultiSelect = true;
        options.ReorderRows = false;
    }
    
    private void GridOnFilterSelected(DynamicGridSelectedFilterSettings settings)
    {
        new UserConfiguration<ReservationManagementUserSettings>().Save(new ReservationManagementUserSettings { Filters = settings });
        Refresh(false, true);
    }

    public override DynamicGridColumns GenerateColumns()
    {
        var columns = new DynamicGridColumns();
        columns.Add<JobRequisitionItem>(x => x.Requisition.DueDate, 80, "Due", "", Alignment.MiddleCenter);
        columns.Add<JobRequisitionItem>(x => x.Requisition.Job.JobNumber, 70, "Job", "", Alignment.MiddleCenter);
        columns.Add<JobRequisitionItem>(x => x.Requisition.Number, 50, "Requi", "", Alignment.MiddleCenter);
        columns.Add<JobRequisitionItem>(x => x.Product.Code, 100, "Product Code", "", Alignment.MiddleLeft);
        columns.Add<JobRequisitionItem>(x => x.Product.Name, 0, "Product Name", "", Alignment.MiddleLeft);
        columns.Add<JobRequisitionItem>(x => x.Style.Code, 100, "Style", "", Alignment.MiddleLeft);
        columns.Add<JobRequisitionItem>(x => x.Dimensions.UnitSize, 70, "Size", "", Alignment.MiddleLeft);

        return columns;
    }

    protected override void ConfigureColumnGroups()
    {
        GetColumnGrouping()
            .AddGroup("Stock", InStockColumn, OnOrderColumn)
            .AddGroup("Treatment", TreatmentRequiredColumn, TreatmentOnOrderColumn)
            .AddGroup("Allocated", AllocatedColumn, IssuedColumn);
    }

    protected override void SelectItems(CoreRow[]? rows)
    {
        base.SelectItems(rows);
        
        bool bAny = rows?.Any() == true;
        ArchiveButton.IsEnabled = bAny;
        CreateOrder.IsEnabled = bAny;
        CreatePickingList.IsEnabled = bAny;
        ConsolidateHoldings.IsEnabled = bAny;
    }

    #region Action Column Buttons

    private void BuildMenu(DynamicMenuColumn column, CoreRow? row)
    {
        if (row is null)
            return;
        
        column.AddItem("Allocate Stock", PRSDesktop.Resources.trolley, AllocateStock_Clicked);
        column.AddSeparator();
        column.AddItem("Substitute Item", PRSDesktop.Resources.refresh, SubstituteItem_Clicked);
        if (!String.IsNullOrWhiteSpace(row.Get<JobRequisitionItem,string>(x=>x.Dimensions.Unit.Conversion)))
            column.AddItem("Convert Dimensions", PRSDesktop.Resources.anonymous, ConvertDimensions_Clicked);
        //column.AddItem("Order Required", PRSDesktop.Resources.purchase, OrderRequired_Clicked);
        column.AddItem("Split Line", PRSDesktop.Resources.split, SplitLine_Clicked);
        if (Security.CanView<StockMovement>())
        {
            column.AddSeparator();
            column.AddItem("View Holdings", PRSDesktop.Resources.warehouse, ViewStockHoldings);
            column.AddItem("View Stock Movements", PRSDesktop.Resources.forklift, ViewStockMovements);

            var viewOrder = column.AddItem("View Purchase Order", PRSDesktop.Resources.purchase, null);
            viewOrder.AddItem("Loading...", null, null, enabled: false);

            var task = Task.Run(() =>
            {
                return Client.Query(
                    new Filter<PurchaseOrderItemAllocation>(x => x.JobRequisitionItem.ID).IsEqualTo(row.Get<JobRequisitionItem, Guid>(x => x.ID)),
                    Columns.None<PurchaseOrderItemAllocation>()
                        .Add(x => x.Item.PurchaseOrderLink.ID)
                        .Add(x => x.Item.PurchaseOrderLink.PONumber)
                        .Add(x => x.Item.PurchaseOrderLink.SupplierLink.Name))
                    .ToTuples<PurchaseOrderItemAllocation, Guid, String, String>(
                        x => x.Item.PurchaseOrderLink.ID,
                        x => x.Item.PurchaseOrderLink.PONumber,
                        x => x.Item.PurchaseOrderLink.SupplierLink.Name)
                    .ToArray();
            });
            task.ContinueWith(orders =>
            {
                viewOrder.Items.Clear();

                if (orders.Result.Length > 0)
                {
                    foreach (var tuple in orders.Result)
                    {
                        if (tuple.Item1 != Guid.Empty)
                        {
                            viewOrder.AddItem($"{tuple.Item2}: {tuple.Item3}", PRSDesktop.Resources.purchase, tuple.Item1, ViewPurchaseOrder);
                        }
                    }
                }
                else
                {
                    viewOrder.IsEnabled = false;
                }

            }, TaskScheduler.FromCurrentSynchronizationContext());
        }
    }

    private void ConvertDimensions_Clicked(CoreRow? row)
    {
        var jri = row?.ToObject<JobRequisitionItem>();
        if (jri == null)
            return;
        if (MessageWindow.ShowOKCancel("Standardise Dimensions?", "Confirm"))
        {
            Progress.ShowModal("Standardising Dimensions", progress =>
            {
                var qty = jri.Qty;
                DimensionUtils.ConvertDimensions(jri.Dimensions, ref qty, (f, c) => Client.Query(f, c));
                jri.Qty = qty;
                Client.Save(jri, "Converted Dimensions in Reservation Management Screen");
            });
            Refresh(false,true);

        }
    }

    private void AllocateStock_Clicked(CoreRow? row)
    {
        if (row is null)
            return;

        var jri = row.ToObject<JobRequisitionItem>();
        var window = new ReservationManagementHoldingsWindow(jri, CompanyDefaultStyle) { Owner = Application.Current.MainWindow };
        window.OnHoldingsReviewRefresh += () =>
        {
            var data = Client.Query(
                new Filter<JobRequisitionItem>(x => x.ID).IsEqualTo(jri.ID),
                DataColumns());
            jri = data.ToObjects<JobRequisitionItem>().FirstOrDefault();
            if(jri is not null)
            {
                UpdateRow(row, jri);
            }
        };
        window.ShowDialog();
    }
    
    private void SubstituteItem_Clicked(CoreRow? row)
    {
        var jri = row?.ToObject<JobRequisitionItem>();
        if (jri == null)
            return;
        var window = new ReservationManagementSubstitutionWindow(jri, UserSettings) { Owner = Application.Current.MainWindow };
        if (window.ShowDialog() == true)
            Refresh(false,true);
    }

    private bool CheckValidAction(JobRequisitionItem item)
    {
        bool valid = true;
        if (item.Allocated + item.Issued >= item.Qty)
        {
            MessageWindow.ShowMessage("Item has already been reserved!", "Error", image: MessageWindow.WarningImage);
            return false;
        }
        else if (item.OnOrder >= 0)
        {
            MessageWindow.ShowMessage("Item is already on order!", "Error", image: MessageWindow.WarningImage);
            return false;
        }
        else if (item.InStock >= item.Qty)
        {
            MessageWindow.ShowMessage("Item is already in stock!", "Error", image: MessageWindow.WarningImage);
            return false;
        }
        return valid;
    }

    private void SplitLine(JobRequisitionItem item, double oldItemQty, double newItemQty, string notes)
    {
        var items = new List<JobRequisitionItem>();

        var newItem = new JobRequisitionItem();

        newItem.Job.CopyFrom(item.Job);

        newItem.Requisition.ID = item.Requisition.ID;
        newItem.Requisition.Job.ID = item.Requisition.Job.ID;

        newItem.Product.ID = item.Product.ID;

        newItem.Dimensions.CopyFrom(item.Dimensions);
        newItem.Style.ID = item.Style.ID;

        newItem.Notes = item.Notes + Environment.NewLine + notes;
        item.Notes = newItem.Notes;

        item.Qty = oldItemQty;
        newItem.Qty = newItemQty;

        items.Add(newItem);
        items.Add(item);

        Client.Save(items, "Split lines from Job Requi Item Review Dashboard");
        MessageWindow.ShowMessage($"Line split - original line Qty is now {item.Qty}. New line Qty is {newItem.Qty}", "Lines split");

        Refresh(false, true);
    }

    private void SplitLine_Clicked(CoreRow? row)
    {
        if (row is null) return;

        var item = row.ToObject<JobRequisitionItem>();
        if (CheckValidAction(item))
        {
            var units = item.Qty - item.InStock;
            if(DoubleEdit.Execute("Enter amount to split", 1, units, 2, ref units))
            {
                SplitLine(item, item.Qty - units, units, "Line split");
            }
        }
    }

    private static bool Archive(IEnumerable<JobRequisitionItem> items)
    {
        var itemsList = items.AsIList();

        var toChange = new List<JobRequisitionItem>();
        foreach(var item in itemsList)
        {
            if (item.Allocated + item.Issued < item.Qty)
            {
                var win = MessageWindow.New()
                    .Message($"Requisition item for requisition {item.Requisition.Number} is not fully allocated; " +
                    $"Are you sure you wish to archive this item?")
                    .Title("Confirm Archive")
                    .AddYesButton("Archive");
                if(itemsList.Count > 1)
                {
                    win.AddNoButton("Skip");
                }
                var result = win
                    .AddCancelButton()
                    .Display().Result;

                if (result == MessageWindowResult.Cancel)
                {
                    return false;
                }
                else if(result == MessageWindowResult.Yes)
                {
                    toChange.Add(item);
                }
            }
            else
            {
                toChange.Add(item);
            }
        }
        if(toChange.Count == 0)
        {
            MessageWindow.ShowMessage("No items archived.", "Cancelled");
            return false;
        }

        foreach(var item in toChange)
        {
            item.Archived = DateTime.Now;
            item.Notes += Environment.NewLine + "Line marked as Archived by " + App.EmployeeName + " on " + DateTime.Now.ToString("dd MMM yy");
        }

        Client.Save(toChange, "Updated From Job Requisition Review Dashboard");

        return true;
    }

    private bool ArchiveButton_Clicked(Button _btn, CoreRow[] rows)
    {
        return Archive(rows.ToObjects<JobRequisitionItem>());
    }

    private void Archive_Clicked(CoreRow? row)
    {
        if (row is null) return;

        if (Archive(CoreUtils.One(row.ToObject<JobRequisitionItem>())))
        {
            Refresh(false, true);
        }
    }

    // private void OrderRequired_Clicked(CoreRow? row)
    // {
    //     if (row is null) return;
    //
    //     var item = row.ToObject<JobRequisitionItem>();
    //     if (CheckValidAction(item))
    //     {
    //         item.OrderRequired = DateTime.Now;
    //         item.Notes += Environment.NewLine + "Line marked as Order Required by " + App.EmployeeName + " on " + DateTime.Now.ToString("dd MMM yy");
    //
    //         Client.Save(item, "Updated From Job Requisition Review Dashboard");
    //
    //         Refresh(false, true);
    //     }
    // }

    private void ViewPurchaseOrder(Guid id)
    {
        var _entity = Client.Query(
                new Filter<PurchaseOrder>(x => x.ID).IsEqualTo(id),
                DynamicGridUtils.LoadEditorColumns(Columns.None<PurchaseOrder>()))
            .ToObjects<PurchaseOrder>().FirstOrDefault();
        
        if (_entity is null) return;

        var window = new DynamicEditorForm()
        {
            Title = "View Purchase Order Details",
        };
        window.Form.DisableOKIfUnchanged = true;
        window.Form.SetLayoutType<VerticalDynamicEditorGridLayout>();

        new SupplierPurchaseOrders().InitialiseEditorForm(window, new PurchaseOrder[] { _entity }, null, true);

        var reportButton = new Button()
        {
            Content = new System.Windows.Controls.Image() { Source = PRSDesktop.Resources.printer.AsBitmapImage(32, 32) },
            Command = new ActionCommand(() => ShowReports(id)),
            Width = 40
        };
        
        window.Form.AddButton(reportButton);
        window.Form.OnChanged += (o, e) =>
        {
            reportButton.IsEnabled = false;
        };
        if (window.ShowDialog() == true)
        {
            Refresh(false, true);
        }
    }

    private static void ShowReports(Guid id)
    {
        var _model = new AutoDataModel<PurchaseOrder>(new Filter<PurchaseOrder>(x => x.ID).IsEqualTo(id));
        var menu = new ContextMenu();
        var templates = ReportUtils.LoadReports("Purchase Orders", _model, Columns.None<ReportTemplate>().Add(x => x.ID, x => x.Name));
        ReportUtils.PopulateMenu(menu, "Purchase Orders", _model, Security.IsAllowed<CanDesignReports>(), true);

        if (menu.Items.Count == 0)
            menu.AddItem("No reports", null, null, enabled: false);
        menu.IsOpen = true;
    }

    private void ViewStockHoldings(CoreRow? row)
    {
        if (row is null) return;

        var _movements = Client.Query(
            new Filter<StockMovement>(x => x.JobRequisitionItem.ID)
                .IsEqualTo(row.Get<JobRequisitionItem, Guid>(x => x.ID)),
            Columns.None<StockMovement>()
                .Add(x => x.ID)
                .Add(x=>x.Location.ID)
                .Add(x=>x.Location.Code)
                .Add(x=>x.Location.Description)
                .Add(x=>x.Style.ID)
                .Add(x=>x.Style.Code)
                .Add(x=>x.Style.Description)
                .AddDimensionsColumns(x=>x.Dimensions)
                .Add(x=>x.Units)
                .Add(x=>x.Cost)
        ).ToObjects<StockMovement>();

        var holdings = StockHoldingExtensions.GroupMovements(_movements);
        var grid = new DynamicItemsListGrid<StockHolding>()
        {
            Items = holdings
        };
        grid.ColumnsLoaded += (sender, args) =>
        {
            args.ColumnGroupings.Clear();
            args.Columns.Clear();
            args.Add<StockHolding>(x => x.Location.Code, 150, "Location", "", Alignment.MiddleLeft);
            args.Add<StockHolding>(x => x.Style.Code, 150, "Style Code", "", Alignment.MiddleLeft);
            args.Add<StockHolding>(x => x.Style.Description, 0, "Style", "", Alignment.MiddleLeft);
            args.Add<StockHolding>(x => x.Dimensions.UnitSize, 150, "Unit Size", "", Alignment.MiddleLeft);
            args.Add<StockHolding>(x => x.Units);
            args.Add<StockHolding>(x => x.AverageValue, caption: "Cost $");
        };

        var window = DynamicGridUtils.CreateGridWindow("Stock Holdings", grid);
        window.ShowDialog();
    }
    
    private void ViewStockMovements(CoreRow? row)
    {
        if (row is null) return;

        var requiID = row.Get<JobRequisitionItem, Guid>(x => x.ID);

        DynamicDataGrid<StockMovement> grid;
        if (DynamicGridUtils.TryFindDynamicGrid(typeof(DynamicDataGrid<>), typeof(StockMovement), out var gridType))
        {
            grid = (Activator.CreateInstance(gridType) as DynamicDataGrid<StockMovement>)!;
        }
        else
        {
            grid = new DynamicDataGrid<StockMovement>();
            grid.OnReconfigure += (options) =>
            {
                options.SelectColumns = true;
            };
            grid.Reconfigure();
        }

        grid.OnDefineFilter += (t) => new Filter<StockMovement>(x => x.JobRequisitionItem.ID).IsEqualTo(requiID);
        var window = DynamicGridUtils.CreateGridWindow("Stock movements", grid);
        window.ShowDialog();
    }

    #endregion

    protected override void Reload(
    	Filters<JobRequisitionItem> criteria, Columns<JobRequisitionItem> columns, ref SortOrder<JobRequisitionItem>? sort,
    	CancellationToken token, Action<CoreTable?, Exception?> action)
    {

        if (JobID.HasValue)
            criteria.Add(new Filter<JobRequisitionItem>(x => x.Requisition.Job.ID).IsEqualTo(JobID.Value));
        
        criteria.Add(new Filter<JobRequisitionItem>(x => x.Requisition.Approved).IsNotEqualTo(DateTime.MinValue));

        criteria.Add(new Filter<JobRequisitionItem>(x => x.Archived).IsEqualTo(DateTime.MinValue));
        criteria.Add(new Filter<JobRequisitionItem>(x => x.Cancelled).IsEqualTo(DateTime.MinValue));

        sort = new SortOrder<JobRequisitionItem>(x => x.Requisition.Number, SortDirection.Descending);
        base.Reload(criteria, columns, ref sort, token, action);
    }
}

public class JobRequiReviewDashboardFilterItem
{
    public Guid SupplierID { get; set; }
    public Guid ProductID { get; set; }
    public string Text { get; set; }

    public JobRequiReviewDashboardFilterItem()
    {
        SupplierID = Guid.Empty;
        ProductID = Guid.Empty;
        Text = "";
    }
}