using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Media;
using Comal.Classes;
using InABox.Clients;
using InABox.Configuration;
using InABox.Core;
using InABox.DynamicGrid;
using InABox.WPF;
using Document = InABox.Core.Document;

namespace PRSDesktop;

public class FactoryPackGrid : DynamicDataGrid<StockHolding>
{
    public Guid AreaID { get; set; }
    
    public ManufacturingPacket? CurrentPacket { get; set; }

    public String AreaDescription
    {
        get => _holding.HeaderText;
        set
        {
            _holding.HeaderText = value;
            Refresh(true,false);
        }
    }

    private readonly Dictionary<Guid, byte[]> _images = new();

    private readonly DynamicActionColumn _holding;

    public FactoryPackGrid()
    {
        HiddenColumns.Add(x=>x.ID);
        HiddenColumns.Add(x=>x.Product.ID);
        HiddenColumns.Add(x=>x.Product.Code);
        HiddenColumns.Add(x=>x.Product.Name);
        HiddenColumns.Add(x=>x.Product.Image.ID);
        HiddenColumns.Add(x => x.Dimensions.Unit.ID);
        HiddenColumns.Add(x => x.Dimensions.Unit.Formula);
        HiddenColumns.Add(x => x.Dimensions.Unit.Format);
        HiddenColumns.Add(x=>x.Dimensions.Height);
        HiddenColumns.Add(x=>x.Dimensions.Width);
        HiddenColumns.Add(x=>x.Dimensions.Length);
        HiddenColumns.Add(x=>x.Dimensions.Weight);
        HiddenColumns.Add(x=>x.Dimensions.Quantity);
        HiddenColumns.Add(x=>x.Dimensions.Value);
        HiddenColumns.Add(x=>x.Dimensions.UnitSize);
        HiddenColumns.Add(x=>x.Style.ID);
        HiddenColumns.Add(x=>x.Style.Code);
        HiddenColumns.Add(x=>x.Style.Description);
        HiddenColumns.Add(x => x.Job.ID);
        HiddenColumns.Add(x=>x.Job.JobNumber);
        HiddenColumns.Add(x=>x.Job.Name);
        HiddenColumns.Add(x=>x.Location.ID);
        HiddenColumns.Add(x=>x.Location.Code);
        HiddenColumns.Add(x=>x.Location.Description);
        HiddenColumns.Add(x=>x.Units);
        HiddenColumns.Add(x => x.Available);
        
        _holding = new DynamicTemplateColumn(PackTemplate) { Width = 0 };
        ActionColumns.Add(_holding);
    }
    
    public override void Reconfigure()
    {
        base.Reconfigure();
        RowHeight = 85;
        Options.Clear();
    }
    
    protected override DynamicGridColumns LoadColumns()
    {
        var columns = new DynamicGridColumns();
        return columns;
    }

    protected override void Reload(Filters<StockHolding> criteria, Columns<StockHolding> columns, ref SortOrder<StockHolding>? sort, Action<CoreTable?, Exception?> action)
    {
        Task<CoreTable> imagetask = Task.Run(() =>
        {
            return new Client<Document>().Query(
                new Filter<Document>(x => x.ID)
                    .InQuery(new Filter<StockHolding>(x => x.Location.Area.ID).IsEqualTo(AreaID),
                        x => x.Product.Image.ID),
                new Columns<Document>(x => x.ID).Add(x => x.Data)
            );
        });
        
        criteria.Add(new Filter<StockHolding>(x => x.Location.Area.ID).IsEqualTo(AreaID));
        
        base.Reload(criteria, columns, ref sort, (o,e) =>
        {
            if (o != null)
            {
                Task.WaitAll(imagetask);
                _images.Clear();
                imagetask.Result.LoadDictionary<Document, Guid, byte[]>(
                    _images,
                    x => x.ID,
                    x => x.Data
                );
            }
            action(o,e);
        });
    }

    private void CreateStackPanel(Grid grid, int row, int column, FontWeight weight,
        params Expression<Func<StockHolding, object>>[] bindings)
    {
        StackPanel result = new StackPanel()
        {
            Orientation = Orientation.Horizontal,
            HorizontalAlignment = HorizontalAlignment.Center,
        };
        result.SetValue(Grid.RowProperty,row);
        result.SetValue(Grid.ColumnProperty,column);
        foreach (var binding in bindings)
        {
            Label label = new Label()
            {
                Margin = new Thickness(5,0,0,0),
                VerticalContentAlignment = VerticalAlignment.Center,
                FontWeight = weight
            };
            label.Bind(Label.ContentProperty,binding);
            result.Children.Add(label);
        }
        grid.Children.Add(result);
    }
    
    private FrameworkElement PackTemplate()
    {
        var grid = new Grid();
        
        grid.RowDefinitions.Add(new RowDefinition() { Height = new GridLength(1, GridUnitType.Star) });
        grid.RowDefinitions.Add(new RowDefinition() { Height = new GridLength(1, GridUnitType.Star) });
        grid.RowDefinitions.Add(new RowDefinition() { Height = new GridLength(1, GridUnitType.Star) });
        
        grid.ColumnDefinitions.Add(new ColumnDefinition() { Width= new GridLength(28, GridUnitType.Pixel)});
        grid.ColumnDefinitions.Add(new ColumnDefinition() { Width= new GridLength(1, GridUnitType.Pixel)});
        grid.ColumnDefinitions.Add(new ColumnDefinition() { Width= new GridLength(90, GridUnitType.Pixel)});
        grid.ColumnDefinitions.Add(new ColumnDefinition() { Width= new GridLength(1, GridUnitType.Star)});
        grid.ColumnDefinitions.Add(new ColumnDefinition() { Width= new GridLength(70, GridUnitType.Pixel)});
        
        Label label = new Label()
        {
            HorizontalAlignment = HorizontalAlignment.Center, 
            VerticalAlignment = VerticalAlignment.Center,
            LayoutTransform = new RotateTransform(-90)
        };
        label.Bind<StockHolding,String>(Label.ContentProperty, x=>x.Location.Code);
        label.SetValue(Grid.RowProperty,0);
        label.SetValue(Grid.RowSpanProperty,3);
        label.SetValue(Grid.ColumnProperty,0);
        grid.Children.Add(label);

        Border border = new Border()
        {
            BorderThickness = new Thickness(0.75),
            BorderBrush = new SolidColorBrush(Colors.DarkGray)
        };
        border.SetValue(Grid.RowProperty,0);
        border.SetValue(Grid.RowSpanProperty,3);
        border.SetValue(Grid.ColumnProperty,1);
        grid.Children.Add(border);
        
        Image image = new Image()
        {
            Stretch = Stretch.Uniform, 
            Margin=new Thickness(5)
        };
        image.Bind<StockHolding,Guid>(Image.SourceProperty, x => x.Product.Image.ID,  new GuidToImageSourceConverter() { Images = _images});
        image.SetValue(Grid.RowProperty,0);
        image.SetValue(Grid.RowSpanProperty,3);
        image.SetValue(Grid.ColumnProperty,2);
        grid.Children.Add(image);
        
        CreateStackPanel(grid, 0, 3, FontWeights.Bold, x => x.Product.Code, x => x.Product.Name);
        CreateStackPanel(grid, 1, 3, FontWeights.Normal, x => x.Dimensions.UnitSize, x => x.Style.Code, x=>x.Style.Description);
        CreateStackPanel(grid, 2, 3, FontWeights.Normal, x => x.Job.JobNumber, x => x.Job.Name);
        
        StackPanel buttonContent = new StackPanel()
        {
            Orientation = Orientation.Vertical,
            VerticalAlignment = VerticalAlignment.Center,
            HorizontalAlignment = HorizontalAlignment.Center
        };
        Label qtyLbl = new Label()
        {
            FontSize = 16,
            FontWeight = FontWeights.Bold,
            HorizontalAlignment = HorizontalAlignment.Center
        };
        qtyLbl.Bind<StockHolding, double>(Label.ContentProperty, x => x.Units, null, BindingMode.Default, "{0:F2}");
        buttonContent.Children.Add(qtyLbl);
        
        Label useLbl = new Label()
        {
            HorizontalAlignment = HorizontalAlignment.Center,
            Content = "Use"
        };
        buttonContent.Children.Add(useLbl);

        Button button = new Button()
        {
            Margin = new Thickness(5),
            Content = buttonContent
        };
        button.Bind<StockHolding,Guid>(Image.SourceProperty, x => x.ID);
        button.SetValue(Grid.RowProperty,0);
        button.SetValue(Grid.RowSpanProperty,4);
        button.SetValue(Grid.ColumnProperty,4);
        button.Click += UseStock;
        grid.Children.Add(button);
        
        return grid;
    }
    
    private class FactoryFloorIssue : BaseObject
    {
        
        public JobRequisitionItem[]? RequisitionItems { get; init; }
        
        [EditorSequence(1)]
        [ComboLookupEditor(typeof(RequisitionIDGenerator))]
        public Guid RequisitionID { get; set; }

        private class RequisitionIDGenerator : LookupGenerator<FactoryFloorIssue>
        {
            public RequisitionIDGenerator(FactoryFloorIssue[] items) : base(items)
            {
            }

            protected override void DoGenerateLookups()
            {
                var items = Items?.FirstOrDefault()?.RequisitionItems;
                if (items == null)
                    return;
                foreach (var item in items)
                {
                    AddValue(item.ID,
                        item.ID == Guid.Empty
                            ? $"{item.Requisition.Description}"
                            : $"{item.Requisition.Number}: {item.Requisition.Description}");
                }
            }
        }

        [EditorSequence(2)]
        public double Qty { get; set; }
    }
    
    private void UseStock(object sender, RoutedEventArgs e)
    {
        
        if (CurrentPacket == null)
        {
            MessageBox.Show("Please select a Manufacturing Packet before proceeding");
            return;
        }
        
        var holdingrow = SelectedRows.FirstOrDefault();
        if (holdingrow == null)
        {
            MessageBox.Show("Please select a Stock Holding before proceeding");
            return;
        }
        
        var holding = holdingrow.ToObject<StockHolding>();
        var requiitems = holding.LoadRequisitionItems().ToArray();
        var ffi = new FactoryFloorIssue()
        {
            RequisitionItems = requiitems,
            Qty = 1,
            RequisitionID = requiitems.FirstOrDefault()?.ID ?? Guid.Empty
        };

        var ffg = new DynamicItemsListGrid<FactoryFloorIssue>();
        
        ffg.OnValidate += (_, _, errors) =>
        {
            var id = ffi.RequisitionID;
            var requi = ffi.RequisitionItems.FirstOrDefault(x => x.ID == id);
            if (requi == null)
                errors.Add("Please select an allocation!");
            else if (ffi.Qty > requi.Qty)
                errors.Add($"Qty must not exceed {requi.Qty}");
        };
        if (!ffg.EditItems([ffi]))
            return;

        var _settings = new LocalConfiguration<FactoryFloorLocalSettings>().Load();
        if (_settings.CurrentBatchDate != DateTime.Today)
        {
            StockMovementBatch batch = new StockMovementBatch
            {
                Type = StockMovementBatchType.Issue,
                TimeStamp = DateTime.Now,
                Notes = "Manufacturing Consumption"
            };
            batch.Employee.ID = App.EmployeeID;
            new Client<StockMovementBatch>().Save(batch,"Created on Factory Floor Screen");
            _settings.CurrentBatchDate = DateTime.Today;
            _settings.CurrentBatchID = batch.ID;
            new LocalConfiguration<FactoryFloorLocalSettings>().Save(_settings);
        }
        
        List<StockMovement> updates = new();
        Guid transactionid = Guid.NewGuid();
        
        if (CurrentPacket.SetoutLink.JobLink.ID != holding.Job.ID)
        {
            
            var transferout = holding.CreateMovement();
            transferout.JobRequisitionItem.ID = ffi.RequisitionID;
            transferout.Batch.ID = _settings.CurrentBatchID;
            transferout.Type = StockMovementType.TransferOut;
            transferout.Issued = ffi.Qty;
            transferout.Transaction = transactionid;
            transferout.System = true;
            transferout.Date = DateTime.Now;
            transferout.Employee.ID = App.EmployeeID;
            updates.Add(transferout);
            
            var transferin = holding.CreateMovement();
            transferin.JobRequisitionItem.ID = ffi.RequisitionID;
            transferin.Batch.ID = _settings.CurrentBatchID;
            transferin.Type = StockMovementType.TransferIn;
            transferin.Received = ffi.Qty;
            transferin.Job.ID = CurrentPacket.SetoutLink.JobLink.ID;
            transferin.Job.Synchronise(CurrentPacket.SetoutLink.JobLink);
            transferin.Transaction = transactionid;
            transferin.Date = DateTime.Now;
            transferin.System = true;
            transferin.Employee.ID = App.EmployeeID;
            updates.Add(transferin);
            
        }
        
        var issue = holding.CreateMovement();
        issue.JobRequisitionItem.ID = ffi.RequisitionID;
        issue.Batch.ID = _settings.CurrentBatchID;
        issue.Type = StockMovementType.Issue;
        issue.Issued = ffi.Qty;
        issue.Job.ID = CurrentPacket.SetoutLink.JobLink.ID;
        issue.Job.Synchronise(CurrentPacket.SetoutLink.JobLink);
        issue.Transaction = transactionid;
        issue.Date = DateTime.Now;
        issue.Employee.ID = App.EmployeeID;
        issue.Notes = "Issued to Manufacturing";
        updates.Add(issue);
        
        new Client<StockMovement>().Save(updates,"Issued Stock to Factory Floor", (_,_) => { });
        if (issue.JobRequisitionItem.ID == Guid.Empty)
            UpdateRow<StockHolding, double>(holdingrow, x=>x.Available, holding.Available - ffi.Qty,false);
        UpdateRow<StockHolding,double>(holdingrow, x => x.Units, holding.Units - ffi.Qty,true);

    }
}