using Comal.Classes;
using InABox.Clients;
using InABox.Core;
using InABox.Wpf;
using InABox.WPF;
using PRSDesktop.Panels.DataEntry;
using Syncfusion.Pdf;
using Syncfusion.Pdf.Parsing;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using Syncfusion.OCRProcessor;
using Syncfusion.Pdf.Graphics;
using Color = System.Drawing.Color;
using Image = System.Windows.Controls.Image;
using Rectangle = System.Windows.Shapes.Rectangle;

namespace PRSDesktop;

public class DocumentOCRContextMenuArgs(ContextMenu menu, string text) : EventArgs
{
    public ContextMenu Menu { get; private set; } = menu;
    public string Text { get; private set; } = text;
}
    
public delegate void DocumentOCRContextMenuOpeningEvent(object sender, DocumentOCRContextMenuArgs args);

/// <summary>
/// Control that allows to view a list of documents, within a zoom control, and providing methods to rotate/explode data.
/// </summary>
/// <remarks>
/// This is originally from the Data entry panel, and this implementation is a <i>little bit</i> scuffed. Basically, because the <see cref="DataEntryDocument"/>
/// is not an <see cref="EntityDocument{T}"/>, there is no good shared interface, so I made this abstract, with a type argument. Then to get the "EntityDocument"
/// ID or the Document ID, there are abstract functions.
/// <b/>
/// Note one needs also to provide <see cref="UpdateDocument"/>. This is a function used by the "Rotate Image" button, and its implementation needs
/// to update the THumbnail of the Entity Document, and save it, along with refreshing the view list.
/// </remarks>
/// <typeparam name="TDocument"></typeparam>
public abstract class DocumentViewList<TDocument> : UserControl, INotifyPropertyChanged
{
    public static readonly DependencyProperty CanRotateImageProperty = DependencyProperty.Register(nameof(CanRotateImage), typeof(bool), typeof(DocumentViewList<TDocument>), new PropertyMetadata(true, CanRotateImage_Changed));

    private static void CanRotateImage_Changed(DependencyObject d, DependencyPropertyChangedEventArgs e)
    {
        if (d is not DocumentViewList<TDocument> list) return;
        list.DoPropertyChanged(e.Property.Name);
    }

    private IList<TDocument> _documents = [];
    public IList<TDocument> Documents
    {
        get => _documents;
        set
        {
            UpdateViewList(value);
        }
    }

    private readonly object _viewListLock = new object();

    private class ViewDocument
    {
        public ImageSource Image { get; set; }

        public TDocument Document { get; set; }

        public int PageNumber { get; set; }

        public ViewDocument(ImageSource image, TDocument document, int page)
        {
            Image = image;
            Document = document;
            PageNumber = page;
        }
    }

    private List<ViewDocument> ViewDocuments { get; } = new();
    public ObservableCollection<ImageSource> ViewList { get; init; } = new();

    private ZoomPanel ZoomPanel;

    private bool _canExplode;
    public bool CanExplode
    {
        get => _canExplode;
        set
        {
            _canExplode = value;
            DoPropertyChanged();
        }
    }

    public event Action? Explode;
    public event Action? ExplodeAll;
    public event Action<TDocument, Document>? UpdateDocument;

    public bool CanRotateImage
    {
        get => (bool)GetValue(CanRotateImageProperty);
        set => SetValue(CanRotateImageProperty, value);
    }
    
    private static OCRProcessor? processor = null;
    
    public DocumentViewList()
    {
        var tesseractpath = Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location),
            "Tesseract");
        if (Directory.Exists(tesseractpath))
        {
            processor ??= new OCRProcessor(tesseractpath);
            processor.Settings.Language = Languages.English;
            processor.Settings.PageSegment = PageSegMode.SparseText;

            var fontfile = Path.Combine(tesseractpath, "ARIALUNI.ttf");
            if (File.Exists(fontfile))
            {
                try
                {
                    using (var fontStream = new FileStream(fontfile, FileMode.Open))
                        processor.UnicodeFont = new PdfTrueTypeFont(fontStream, 8);
                }
                catch (Exception e)
                {
                    Logger.Send(LogType.Error,"",$"Unable to Load ARIALUNI.TTF: {e.Message}\n{e.StackTrace}");
                }
            }
        }

        var border = new Border();
        border.BorderBrush = Colors.Gray.ToBrush();
        border.Background = Colors.DimGray.ToBrush();

        ZoomPanel = new ZoomPanel();

        var itemsControl = new ItemsControl();
        itemsControl.Margin = new Thickness(10);
        itemsControl.ItemsSource = ViewList;
        var factory = new FrameworkElementFactory(typeof(StackPanel));
        factory.SetValue(StackPanel.OrientationProperty, Orientation.Vertical);
        itemsControl.ItemsPanel = new ItemsPanelTemplate(factory);

        itemsControl.ContextMenu = new ContextMenu();
        var explode = itemsControl.ContextMenu.AddItem("Regroup Pages", null, Explode_Click);
        explode.Bind(VisibilityProperty, this, x => x.CanExplode, new InABox.WPF.BooleanToVisibilityConverter(Visibility.Visible, Visibility.Collapsed));
        var explodeAll = itemsControl.ContextMenu.AddItem("Explode All Pages", null, ExplodeAll_Click);
        explodeAll.Bind(VisibilityProperty, this, x => x.CanExplode, new InABox.WPF.BooleanToVisibilityConverter(Visibility.Visible, Visibility.Collapsed));

        var viewImage = new MenuItem()
        {
            Header = "View Image"
        };
        viewImage.ToolTip = "Show this image in a separate window.";
        viewImage.Bind<ImageSource, ImageSource>(MenuItem.TagProperty, x => x);
        viewImage.Click += ViewImage_Click;
        itemsControl.ContextMenu.Items.Add(viewImage);

        var rotateImage = new MenuItem()
        {
            Header = "Rotate Document"
        };
        rotateImage.ToolTip = "Rotate this document 90° clockwise";
        rotateImage.Bind<ImageSource, ImageSource>(MenuItem.TagProperty, x => x);
        rotateImage.SetBinding(MenuItem.IsEnabledProperty, new Binding("CanRotateImage") { Source = this });
        rotateImage.Click += RotateImage_Click;
        itemsControl.ContextMenu.Items.Add(rotateImage);

        //var ocrImage = new MenuItem()
        //{
        //    Header = "OCR Document (Preview)"
        //};
        //ocrImage.ToolTip = "Extract Text from this Image (Preview Only)";
        //ocrImage.Bind<ImageSource, ImageSource>(MenuItem.TagProperty, x => x);
        //ocrImage.Click += OCRImage_Click;
        //itemsControl.ContextMenu.Items.Add(ocrImage);
        
        itemsControl.ItemTemplate = TemplateGenerator.CreateDataTemplate(() =>
        {
            var grid = new Grid();
            
            System.Windows.Point? dragStartPoint = null;
            
            var dragObject = new Border()
            {
                BorderThickness = new Thickness(0.75), 
                BorderBrush = System.Windows.Media.Brushes.Firebrick, 
                Background = new SolidColorBrush(Colors.Red)
                {
                    Opacity = 0.2
                },
                Visibility = Visibility.Collapsed
            };
            
            ContextMenu dragMenu = new ContextMenu();

            dragMenu.Closed += (s, e) =>
            {
                Logger.Send(LogType.Information,"","DragMenu Closed");
                dragStartPoint = null;
                dragObject.Visibility = Visibility.Collapsed;
            };
            
            var img = new Image();
            img.Bind<ImageSource, ImageSource>(Image.SourceProperty, x => x);
            img.Margin = new(0, 0, 0, 5);
            img.ContextMenu = itemsControl.ContextMenu;
            
            img.PreviewMouseLeftButtonDown += (sender, args) =>
            {
                if (sender is not Image image)
                    return;
                
                if(args.ClickCount >= 2)
                {
                    OpenImageWindow(image.Source);
                    args.Handled = true;
                }
                
                if (processor == null || dragStartPoint != null || dragMenu.IsOpen)
                    return;
                
                Logger.Send(LogType.Information,"",$"Starting Drag - {sender.GetType()}");
                dragStartPoint = args.GetPosition(img);
                Logger.Send(LogType.Information,"",$"Setting DragObject to be visible");
                dragObject.Visibility = Visibility.Visible;
                Logger.Send(LogType.Information,"",$"Set DragObject to be visible");
                dragObject.Margin = new Thickness(dragStartPoint.Value.X, dragStartPoint.Value.Y, img.ActualWidth-dragStartPoint.Value.X, img.ActualHeight-dragStartPoint.Value.Y);
                
            };
        
            img.PreviewMouseMove += (sender, args) =>
            {
                if (processor == null || dragStartPoint == null || dragMenu.IsOpen)
                    return;
                
                Logger.Send(LogType.Information,"",$"MouseMove with DragObject set");

                var point = args.GetPosition(img);
                var top = Math.Min(point.Y, dragStartPoint.Value.Y);
                var left = Math.Min(point.X, dragStartPoint.Value.X);
                var bottom = Math.Max(point.Y, dragStartPoint.Value.Y);
                var right = Math.Max(point.X, dragStartPoint.Value.X);
                Logger.Send(LogType.Information,"",$"Drag Rectangle is {left},{top} -> {right},{bottom}");
                dragObject.Margin = new Thickness(left+1, top+1, (img.ActualWidth-right)+1, (img.ActualHeight-bottom)+1);
                
            };

            img.PreviewMouseLeftButtonUp += (sender, args) =>
            {
                if (processor == null)
                    return;
                
                Logger.Send(LogType.Information,"",$"Hiding DragObject");
                
                if (dragStartPoint == null)
                    return;
                Logger.Send(LogType.Information,"",$"Ending Drag");
                
                
                if (sender is not Image image || image.Source is not BitmapSource bitmapSource)
                    return;
                
                var croprect = new RectangleF(
                    (float)dragObject.Margin.Left-0.75F, 
                    (float)dragObject.Margin.Top-0.75F,
                    (float)(img.ActualWidth+0.75F-(dragObject.Margin.Left+dragObject.Margin.Right)), 
                    (float)(img.ActualHeight+0.75F-(dragObject.Margin.Top+dragObject.Margin.Bottom))
                );

                if (croprect.Width < 5 || croprect.Height < 5)
                {
                    dragStartPoint = null;
                    dragObject.Visibility = Visibility.Collapsed;
                    return;
                }

                var bitmap = ImageUtils.BitmapSourceToBitmap(bitmapSource);
                Bitmap bmp = bitmap.Clone(croprect, bitmap.PixelFormat);
                bmp = Resize(bmp, bmp.Width * 10, bmp.Height * 10);
                bmp = SetGrayscale(bmp);
                bmp = RemoveNoise(bmp);
                bmp.Save(Path.Combine(CoreUtils.GetPath(),"ocr.bmp"));
                
                string text = processor.PerformOCR(bmp, CoreUtils.GetPath()).Trim();
                
                if (string.IsNullOrWhiteSpace(text))
                {
                    dragStartPoint = null;
                    dragObject.Visibility = Visibility.Collapsed;
                    return;
                }
                
                dragMenu.Items.Clear();
                OCRContextMenuOpening?.Invoke(this, new DocumentOCRContextMenuArgs(dragMenu, text));
                if (dragMenu.Items.Count == 0)
                {
                    dragStartPoint = null;
                    dragObject.Visibility = Visibility.Collapsed;
                    return;
                }
                
                dragMenu.Items.Insert(0,new MenuItem() { Header = text, IsEnabled = false});
                dragMenu.Items.Insert(1,new Separator());
                dragMenu.IsOpen = true;
                
            };

            img.MouseUp += (sender, args) =>
            {
                Logger.Send(LogType.Information, "", $"MouseUp");
            };
            
            grid.Children.Add(img);
            grid.Children.Add(dragObject);
            return grid;
        });
        
        ZoomPanel.Content = itemsControl;

        border.Child = ZoomPanel;
        Content = border;

        BindingOperations.EnableCollectionSynchronization(ViewList, _viewListLock);
    }
    
    public event DocumentOCRContextMenuOpeningEvent OCRContextMenuOpening;
    
    protected abstract Guid GetID(TDocument document);
    protected abstract Guid GetDocumentID(TDocument document);
    protected abstract string GetDocumentFileName(IEnumerable<TDocument> documents, Document document);
    protected abstract IEnumerable<Document> LoadDocuments(IEnumerable<Guid> ids);


    public void UpdateViewList(IList<TDocument> documents, bool force = false)
    {
        if (!force && documents.Count == _documents.Count && !documents.Any(x => _documents.All(y => GetID(x) != GetID(y))))
            return;

        _documents = documents;
        ViewList.Clear();
        ViewDocuments.Clear();

        if(_documents.Count == 0)
        {
            return;
        }

        Task.Run(() =>
        {
            var docs = LoadDocuments(Documents.Select(GetDocumentID).Distinct());
            foreach (var doc in docs)
                doc.FileName = GetDocumentFileName(Documents, doc);
            LoadDocuments(docs);
        }).ContinueWith((task) =>
        {
            if(task.Exception is not null)
            {
                MessageWindow.ShowError("An error occurred while loading the documents", task.Exception);
            }
        }, TaskScheduler.FromCurrentSynchronizationContext());
    }

    private void LoadDocuments(IEnumerable<Document> documents)
    {
        var bitmaps = new Dictionary<Guid, List<ImageSource>>();
        foreach (var document in documents.Where(x=>x.Data?.Any() == true))
        {
            List<byte[]> images;
            var bitmapImages = new List<ImageSource>();
            var extension = Path.GetExtension(document.FileName).ToLower();
            if (extension == ".pdf")
            {
                images = new List<byte[]>();
                try
                {
                    bitmapImages = ImageUtils.RenderPDFToImageSources(document.Data);
                }
                catch (Exception e)
                {
                    MessageBox.Show($"Cannot load document '{document.FileName}': {e.Message}");
                }
            }
            else if (extension == ".jpg" || extension == ".jpeg" || extension == ".png" || extension == ".bmp")
            {
                images = new List<byte[]> { document.Data };
            }
            else
            {
                images = ImageUtils.RenderTextFileToImages(Encoding.UTF8.GetString(document.Data));
            }

            bitmapImages.AddRange(images.Select(x =>
            {
                try
                {
                    return ImageUtils.LoadImage(x);
                }
                catch (Exception e)
                {
                    Dispatcher.BeginInvoke(() =>
                    {
                        MessageWindow.ShowError($"Cannot load document '{document.FileName}", e);
                    });
                }
                return null;
            }).Where(x => x != null).Cast<ImageSource>());

            foreach (var image in bitmapImages)
            {
                if (!bitmaps.TryGetValue(document.ID, out var list))
                {
                    list = new List<ImageSource>();
                    bitmaps[document.ID] = list;
                }

                list.Add(image);
            }
        }
        ViewDocuments.Clear();

        var maxWidth = 0.0;
        foreach (var scan in Documents)
        {
            if (bitmaps.TryGetValue(GetDocumentID(scan), out var list))
            {
                int page = 1;
                foreach (var bitmap in list)
                {
                    maxWidth = Math.Max(maxWidth, bitmap.Width);
                    ViewDocuments.Add(new(bitmap, scan, page));
                    page++;
                }
            }
        }

        lock (_viewListLock)
        {
            ViewList.Clear();
            foreach(var doc in ViewDocuments)
            {
                ViewList.Add(doc.Image);
            }
            if(maxWidth != 0.0)
            {
                ZoomPanel.Scale = ZoomPanel.ActualWidth / (maxWidth * 1.1);
                ZoomPanel.MinScale = ZoomPanel.Scale / 2;
            }
        }
    }

    private void RotateDocument(Document doc, int pageNumber)
    {
        var extension = Path.GetExtension(doc.FileName).ToLower();
        if (extension == ".pdf")
        {
            var loadeddoc = new PdfLoadedDocument(doc.Data);

            bool allPages = loadeddoc.PageCount() > 1;
            if (allPages)
            {
                allPages = MessageWindow.New()
                    .Message("Do you want to rotate all pages in this PDF?")
                    .Title("Rotate all?")
                    .AddYesButton("All pages")
                    .AddNoButton("Just this page")
                    .Display().Result == MessageWindowResult.Yes;
            }

            if(allPages)
            {
                foreach (var page in loadeddoc.GetPages())
                {
                    var rotation = (int)page.Rotation;
                    rotation = (rotation + 1) % 4;
                    page.Rotation = (PdfPageRotateAngle)rotation;
                }
            }
            else if(pageNumber <= loadeddoc.PageCount())
            {
                var page = loadeddoc.GetPage(pageNumber - 1);

                var rotation = (int)page.Rotation;
                rotation = (rotation + 1) % 4;
                page.Rotation = (PdfPageRotateAngle)rotation;
            }

            doc.Data = loadeddoc.SaveToBytes();
        }
        else if (extension == ".jpg" || extension == ".jpeg" || extension == ".png" || extension == ".bmp")
        {
            using var stream = new MemoryStream(doc.Data);
            var bitmap = Bitmap.FromStream(stream);
            bitmap.RotateFlip(RotateFlipType.Rotate90FlipNone);
            using var outStream = new MemoryStream();
            bitmap.Save(outStream, extension switch
            {
                ".jpg" or ".jpeg" => ImageFormat.Jpeg,
                ".png" => ImageFormat.Png,
                _ => ImageFormat.Bmp
            });
            doc.Data = outStream.ToArray();
        }
        else
        {
            using var stream = new MemoryStream(doc.Data);
            var loadeddoc = DataEntryReGroupWindow.RenderToPDF(doc.FileName, stream);

            foreach (var page in loadeddoc.GetPages())
            {
                var rotation = (int)page.Rotation;
                rotation = (rotation + 1) % 4;
                page.Rotation = (PdfPageRotateAngle)rotation;
            }

            doc.Data = loadeddoc.SaveToBytes();
        }
    }
    
    
    public Bitmap Resize(Bitmap bmp, int newWidth, int newHeight)
    {
        
        Bitmap result = new Bitmap(newWidth, newHeight);
        using (Graphics g = Graphics.FromImage(result))
        {
            g.InterpolationMode = InterpolationMode.HighQualityBicubic;
            g.DrawImage(bmp, 0, 0, newWidth, newHeight);
        }
        return result;
     
            // Bitmap temp = (Bitmap)bmp;
            //
            // Bitmap bmap = new Bitmap(newWidth, newHeight, temp.PixelFormat);
            //
            // double nWidthFactor = (double)temp.Width / (double)newWidth;
            // double nHeightFactor = (double)temp.Height / (double)newHeight;
            //
            // double fx, fy, nx, ny;
            // int cx, cy, fr_x, fr_y;
            // Color color1 = new Color();
            // Color color2 = new Color();
            // Color color3 = new Color();
            // Color color4 = new Color();
            // byte nRed, nGreen, nBlue;
            //
            // byte bp1, bp2;
            //
            // for (int x = 0; x < bmap.Width; ++x)
            // {
            //     for (int y = 0; y < bmap.Height; ++y)
            //     {
            //
            //         fr_x = (int)Math.Floor(x * nWidthFactor);
            //         fr_y = (int)Math.Floor(y * nHeightFactor);
            //         cx = fr_x + 1;
            //         if (cx >= temp.Width) cx = fr_x;
            //         cy = fr_y + 1;
            //         if (cy >= temp.Height) cy = fr_y;
            //         fx = x * nWidthFactor - fr_x;
            //         fy = y * nHeightFactor - fr_y;
            //         nx = 1.0 - fx;
            //         ny = 1.0 - fy;
            //
            //         color1 = temp.GetPixel(fr_x, fr_y);
            //         color2 = temp.GetPixel(cx, fr_y);
            //         color3 = temp.GetPixel(fr_x, cy);
            //         color4 = temp.GetPixel(cx, cy);
            //
            //         // Blue
            //         bp1 = (byte)(nx * color1.B + fx * color2.B);
            //
            //         bp2 = (byte)(nx * color3.B + fx * color4.B);
            //
            //         nBlue = (byte)(ny * (double)(bp1) + fy * (double)(bp2));
            //
            //         // Green
            //         bp1 = (byte)(nx * color1.G + fx * color2.G);
            //
            //         bp2 = (byte)(nx * color3.G + fx * color4.G);
            //
            //         nGreen = (byte)(ny * (double)(bp1) + fy * (double)(bp2));
            //
            //         // Red
            //         bp1 = (byte)(nx * color1.R + fx * color2.R);
            //
            //         bp2 = (byte)(nx * color3.R + fx * color4.R);
            //
            //         nRed = (byte)(ny * (double)(bp1) + fy * (double)(bp2));
            //
            //         bmap.SetPixel(x, y, System.Drawing.Color.FromArgb
            // (255, nRed, nGreen, nBlue));
            //     }
            // }
            //
            //
            //
            // return bmap;
        
    }
    
    public Bitmap SetGrayscale(Bitmap img)
    {
    
        Bitmap temp = (Bitmap)img;
        Bitmap bmap = (Bitmap)temp.Clone();
        Color c;
        for (int i = 0; i < bmap.Width; i++)
        {
            for (int j = 0; j < bmap.Height; j++)
            {
                c = bmap.GetPixel(i, j);
                byte gray = (byte)(.299 * c.R + .587 * c.G + .114 * c.B);
    
                bmap.SetPixel(i, j, Color.FromArgb(gray, gray, gray));
            }
        }
        return (Bitmap)bmap.Clone();
    
    }
    
    public Bitmap RemoveNoise(Bitmap bmap)
    {
    
        for (var x = 0; x < bmap.Width; x++)
        {
            for (var y = 0; y < bmap.Height; y++)
            {
                var pixel = bmap.GetPixel(x, y);
                if (pixel.R < 162 && pixel.G < 162 && pixel.B < 162)
                    bmap.SetPixel(x, y, Color.Black);
                else if (pixel.R > 162 && pixel.G > 162 && pixel.B > 162)
                    bmap.SetPixel(x, y, Color.White);
            }
        }
    
        return bmap;
    }


    // private async void OCRImage_Click(object sender, RoutedEventArgs e)
    // {
    //     if (sender is not MenuItem item || item.Tag is not ImageSource image) return;
    //
    //     var document = ViewDocuments.FirstOrDefault(x => x.Image == image);
    //     if (document is null)
    //     {
    //         MessageWindow.ShowError("An error occurred", "Document does not exist in ViewDocuments list");
    //         return;
    //     }
    //     
    //     var doc = LoadDocuments(CoreUtils.One(GetDocumentID(document.Document))).First();
    //     
    //     if (doc.FileName.ToLower().EndsWith(".txt"))
    //     {
    //         var text = System.Text.Encoding.UTF8.GetString(doc.Data);
    //         File.WriteAllText(Path.Combine(CoreUtils.GetPath(),"txt-ocr.txt"),text);
    //         return;
    //     }
    //     else
    //     {
    //         List<String> pagetexts = new List<String>();
    //         var images = doc.FileName.ToLower().EndsWith(".pdf")
    //             ? ImageUtils.RenderPDFToImageBytes(doc.Data, ImageUtils.ImageEncoding.PNG).ToList()
    //             : new List<byte[]>() { doc.Data };
    //         
    //         using (var fontStream = new FileStream(Path.Combine(CoreUtils.GetPath(), "ARIALUNI.ttf"), FileMode.Open))
    //         {
    //             using (var font = new PdfTrueTypeFont(fontStream, 8))
    //             {
    //                 using (OCRProcessor processor = new OCRProcessor(CoreUtils.GetPath()))
    //                 {
    //                     processor.Settings.Language = Languages.English;
    //                     processor.Settings.PageSegment = PageSegMode.SparseText;
    //                     processor.Settings.OCREngineMode = OCREngineMode.LSTMOnly;
    //                     //processor.UnicodeFont = font;
    //                     foreach (var img in images)
    //                     {
    //                         using (var ms = new MemoryStream(img))
    //                         {
    //                             using (var bitmap = new Bitmap(ms))
    //                             {
    //                                 var bmp = Resize(bitmap, bitmap.Width * 3, bitmap.Height * 3);      
    //                                 bmp = SetGrayscale(bmp);
    //                                 bmp = RemoveNoise(bmp);
    //                                 bmp.Save(Path.Combine(CoreUtils.GetPath(),"ocr.bmp"));
    //                                 string text = processor.PerformOCR(bitmap, CoreUtils.GetPath());
    //                                 pagetexts.Add(text);
    //                             }
    //                         }
    //                         
    //                     }
    //                 }
    //             }
    //         
    //             fontStream.Close();
    //         }
    //         File.WriteAllText(Path.Combine(CoreUtils.GetPath(), "image-ocr.txt"), String.Join("\n\n",pagetexts));
    //         
    //     }
    //     
    //     try
    //     {
    //         // TextRecognizer? _textRecognizer;
    //         // var readyState = TextRecognizer.GetReadyState();
    //         // if (readyState is AIFeatureReadyState.NotSupportedOnCurrentSystem or AIFeatureReadyState.DisabledByUser)
    //         //     return;
    //         //
    //         // if (readyState == AIFeatureReadyState.NotReady)
    //         //     await TextRecognizer.EnsureReadyAsync();
    //         //     
    //         // _textRecognizer = await TextRecognizer.CreateAsync();
    //         // var bitmap = await ByteArrayToSoftwareBitmapAsync(doc.Data);
    //         //
    //         // SoftwareBitmap displayableImage = SoftwareBitmap.Convert(bitmap,
    //         //     BitmapPixelFormat.Bgra8, BitmapAlphaMode.Premultiplied);
    //         //
    //         // var imageBuffer = ImageBuffer.CreateForSoftwareBitmap(displayableImage);
    //         // var result = _textRecognizer.RecognizeTextFromImage(imageBuffer);
    //         // File.WriteAllText(Path.Combine(CoreUtils.GetPath(),"ai-ocr.txt"),String.Join("\n",result.Lines.Select(x=>x.Text)));
    //         
    //         
    //         // else 
    //         // {
    //         //     var images = doc.FileName.ToLower().EndsWith(".pdf")
    //         //         ? ImageUtils.RenderPDFToImageBytes(doc.Data).ToList()
    //         //         : new List<byte[]>() { doc.Data };
    //         //     
    //         //     using (OCRProcessor processor = new OCRProcessor(CoreUtils.GetPath()))
    //         //     {
    //         //         PdfLoadedDocument pdfLoadedDocument = new PdfLoadedDocument(doc.Data);
    //         //         processor.Settings.Language = Languages.English;
    //         //         var text = processor.PerformOCR(pdfLoadedDocument);
    //         //         File.WriteAllText(Path.Combine(CoreUtils.GetPath(),"pdf-ocr.txt"),text);
    //         //     }
    //         // }
    //         // else
    //         // {
    //         //     using (var stream = new MemoryStream(doc.Data))
    //         //     {
    //         //         using (var bmp = new Bitmap(stream))
    //         //         {
    //         //             using (var fontStream = new FileStream(Path.Combine(CoreUtils.GetPath(), "ARIALUNI.ttf"),
    //         //                        FileMode.Open))
    //         //             {
    //         //                 using (var font = new PdfTrueTypeFont(fontStream, 8))
    //         //                 {
    //         //                     using (OCRProcessor processor = new OCRProcessor(CoreUtils.GetPath()))
    //         //                     {
    //         //                         processor.Settings.Language = Languages.English;
    //         //                         processor.UnicodeFont = font;
    //         //                         string text = processor.PerformOCR(bmp, CoreUtils.GetPath());
    //         //                         File.WriteAllText(Path.Combine(CoreUtils.GetPath(), "image-ocr.txt"), text);
    //         //                     }
    //         //                 }
    //         //
    //         //                 fontStream.Close();
    //         //             }
    //         //         }
    //         //     }
    //         // }}
    //     }
    //     catch(Exception err)
    //     {
    //         MessageWindow.ShowError("Something went wrong while trying to scan this document.", err);
    //         return;
    //     }
    //     
    // }

    

    private void RotateImage_Click(object sender, RoutedEventArgs e)
    {
        if (sender is not MenuItem item || item.Tag is not ImageSource image) return;

        var document = ViewDocuments.FirstOrDefault(x => x.Image == image);
        if (document is null)
        {
            MessageWindow.ShowError("An error occurred", "Document does not exist in ViewDocuments list");
            return;
        }

        var doc = LoadDocuments(CoreUtils.One(GetDocumentID(document.Document))).First();
        try
        {
            RotateDocument(doc, document.PageNumber);
        }
        catch(Exception err)
        {
            MessageWindow.ShowError("Something went wrong while trying to rotate this document.", err);
            return;
        }

        Client.Save(doc, "Rotated by user.");

        UpdateDocument?.Invoke(document.Document, doc);
    }

    private void ViewImage_Click(object sender, RoutedEventArgs e)
    {
        if (sender is not MenuItem item || item.Tag is not ImageSource image) return;

        OpenImageWindow(image);
    }

    private void ExplodeAll_Click()
    {
        ExplodeAll?.Invoke();
    }

    private void Explode_Click()
    {
        Explode?.Invoke();
    }

    #region Image Window

    private List<DataEntryDocumentWindow> OpenWindows = new();

    public void CloseImageWindows()
    {
        while (OpenWindows.Count > 0)
        {
            var win = OpenWindows.Last();
            OpenWindows.RemoveAt(OpenWindows.Count - 1);
            win.Close();
        }
    }
    private void OpenImageWindow(ImageSource image)
    {
        var window = OpenWindows.FirstOrDefault(x => x.Images.Contains(image));
        if (window is not null)
        {
            window.Activate();
        }
        else
        {
            var docID = GetDocumentID(ViewDocuments.First(x => x.Image == image).Document);
            var docs = ViewDocuments.Where(x => GetDocumentID(x.Document) == docID);

            window = new DataEntryDocumentWindow();
            window.Topmost = true;
            foreach(var doc in docs)
            {
                window.Images.Add(doc.Image);
            }
            OpenWindows.Add(window);
            window.Closed += OpenWindow_Closed;
            window.Show();
        }
    }

    private void OpenWindow_Closed(object? sender, EventArgs e)
    {
        if (sender is not DataEntryDocumentWindow window) return;
        OpenWindows.Remove(window);
    }
    

    #endregion

    public event PropertyChangedEventHandler? PropertyChanged;

    protected void DoPropertyChanged([CallerMemberName] string propertyName = "")
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}