using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media.Imaging;
using Comal.Classes;
using InABox.Clients;
using InABox.Configuration;
using InABox.Core;
using InABox.Dxf;
using InABox.Wpf;
using InABox.WPF;
using Microsoft.Win32;

namespace PRSDesktop;

public class ProductDockFilterButton : FilterButton<Product>
{
    public ProductDockFilterButton() : base(
        new GlobalConfiguration<CoreFilterDefinitions>("ProductDock.Product"),
        new UserConfiguration<CoreFilterDefinitions>("ProductDock.Product"))
    {
    }
}


/// <summary>
///     Interaction logic for ProductLookup.xaml
/// </summary>
public partial class ProductLookupDock : UserControl, IDockPanel
{
    private ProductHoldingControl? _holdings;
    private Product[] Products = Array.Empty<Product>();

    public ProductLookupDock()
    {
        InitializeComponent();
    }
    
    public void Setup()
    {
        if (!Security.CanView<StockLocation>())
            return;
        if (_holdings == null)
        {
            _holdings = new ProductHoldingControl();
            HoldingsTab.Content = _holdings;
            HoldingsTab.Visibility = Visibility.Visible;
        }

        _holdings.Refresh(true, false);
    }

    public void Refresh()
    {

    }

    private Filter<Product>? GetSearchFilter()
    {
        var search = Search.Text;
        if (!string.IsNullOrEmpty(search))
        {
            return new Filter<Product>(x => x.Code).Contains(Search.Text).Or(x => x.Name).Contains(search);
        }
        else
        {
            return null;
        }
    }

    private void Reload()
    {
        var filters = new Filters<Product>();
        filters.Add(GetSearchFilter());
        filters.Add(FilterButton.GetFilter());
        var filter = filters.Combine() ?? new Filter<Product>().None();

        using (new WaitCursor())
        {
            Products = Client.Query(
                filter,
                Columns.Required<Product>().Add(x => x.ID, x => x.Code, x => x.Name, x => x.Image.ID, x => x.Image.FileName),
                new SortOrder<Product>(x => x.Code))
                .ToObjects<Product>().ToArray();

            Items.ItemsSource = Products;
            if (Products.Any())
            {
                Items.Focus();
                Items.SelectedIndex = 0;
                var listBoxItem = (ListBoxItem)Items.ItemContainerGenerator.ContainerFromItem(Items.SelectedItem);
                listBoxItem?.Focus();
            }
        }
    }

    private void Search_TextChanged(object sender, TextChangedEventArgs e)
    {
    }

    private void Search_KeyUp(object sender, KeyEventArgs e)
    {
        if (e.Key == Key.Enter)
        {
            Reload();
        }
        else if (e.Key == Key.Down)
        {
            if (Products.Any())
            {
                Items.Focus();
                //Items.SelectedValue = items.First();
                Items.SelectedIndex = 0;
                var listBoxItem = (ListBoxItem)Items.ItemContainerGenerator.ContainerFromItem(Items.SelectedItem);
                listBoxItem.Focus();
            }
        }
    }

    private void Items_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        Image.Source = null;
        if (e.AddedItems.Count > 0)
        {
            var item = e.AddedItems[0] as Product;
            if (!item.Image.ID.Equals(Guid.Empty))
                new Client<Document>().Query(
                    new Filter<Document>(x => x.ID).IsEqualTo(item.Image.ID),
                    Columns.None<Document>().Add(x => x.ID, x => x.Data),
                    null,
                    CoreRange.All,
                    (docs, error) =>
                    {
                        var row = docs.Rows.FirstOrDefault();
                        if (row != null)
                        {
                            var id = row.Get<Document, Guid>(x => x.ID);
                            
                            var data = row.Get<Document, byte[]>(x => x.Data);
                            if (data?.Any() == true)
                            {
                                var ms = new MemoryStream(data);
                                var bmp = new Bitmap(ms);
                                Dispatcher.BeginInvoke(
                                    new Action<Guid>(o =>
                                    {
                                        if (Items.SelectedValue != null)
                                        {
                                            var sel = (Product)Items.SelectedValue;
                                            if (sel.Image.ID == o)
                                                Image.Source = bmp.AsBitmapImage(false);
                                        }
                                    }), id
                                );
                            }
                        }
                    }
                );
            else
                Image.Source = null;
            if (Security.CanView<StockLocation>())
            {
                _holdings.Product = item;
                _holdings.Refresh(false, true);
            }
        }
        else
        {
            Image.Source = null;
        }


    }

    private void Items_KeyUp(object sender, KeyEventArgs e)
    {
    }

    private void Items_KeyDown(object sender, KeyEventArgs e)
    {
        if (e.Key == Key.Up)
            if (Items.SelectedIndex == 0)
                Search.Focus();
    }


    private void ImageMenu_Opened(object sender, RoutedEventArgs e)
    {
        var pdi = Items.SelectedItem as Product;

        var anyproducts = pdi != null;
        var validimage = pdi != null && pdi.Image.ID != Guid.Empty;
        LoadImageFromFile.IsEnabled = anyproducts;
        SaveImageToFile.IsEnabled = validimage;
        CopyImageToClipboard.IsEnabled = validimage;
        PasteImageFromClipboard.IsEnabled = anyproducts && (Clipboard.ContainsData("ProductImage") || Clipboard.ContainsImage());
        ClearImage.IsEnabled = anyproducts;
    }

    private string SelectedProducts()
    {
        var product = Items.SelectedItem as Product;
        return product != null ? product.Code : "";
    }

    private void UpdateProductImages(Guid id, string filename, Bitmap? bitmap)
    {
        var product = Items.SelectedItem as Product;
        if (product == null)
            return;

        var docid = id;
        if (bitmap != null && docid == Guid.Empty)
        {
            byte[] data = null;
            using (var ms = new MemoryStream())
            {
                bitmap.Save(ms, ImageFormat.Png);
                data = ms.GetBuffer();
            }

            var crc = CoreUtils.CalculateCRC(data);

            var doc = new Client<Document>().Query(
                new Filter<Document>(x => x.FileName).IsEqualTo(Path.GetFileName(filename)).And(x => x.CRC).IsEqualTo(crc),
                Columns.None<Document>().Add(x => x.ID)
            ).Rows.FirstOrDefault()?.ToObject<Document>();
            if (doc == null)
            {
                doc = new Document
                {
                    FileName = Path.GetFileName(filename),
                    CRC = crc,
                    TimeStamp = DateTime.Now,
                    Data = data
                };
                new Client<Document>().Save(doc, "");
            }

            docid = doc.ID;
        }


        product.Image.ID = CoreUtils.FullGuid;
        product.CommitChanges();
        product.Image.ID = docid;
        product.Image.FileName = Path.GetFileName(filename);

        new Client<Product>().Save(product, "Cleared Product Image", (p, err) => { });

        Image.Source = bitmap?.AsBitmapImage();
    }

    private Bitmap? ConvertDXFFile(string filename)
    {
        Bitmap? result = null;

        using (var stream = new FileStream(filename, FileMode.Open, FileAccess.Read))
        {
            //String newfile = Path.ChangeExtension(Path.GetFileName(filename), "png");
            try
            {
                result = DxfUtils.ProcessImage(stream);
            }
            catch (Exception e)
            {
                MessageWindow.ShowError("Could not load DXF file", e);
                result = null;
            }
        }

        return result;
    }

    private void LoadImageFromFile_Click(object sender, RoutedEventArgs e)
    {
        var product = Items.SelectedItem as Product;
        if (product == null)
            return;

        var dlg = new OpenFileDialog();
        dlg.Filter = "Image Files (*.png;*.jpg;*.jpeg;*.bmp)|*.png;*.jpg;*.jpeg;*.bmp|DXF Files (*.dxf)|*.dxf";
        if (dlg.ShowDialog() == true)
        {
            var filename = dlg.FileName.ToLower();

            Progress.Show("Updating Images: " + Path.GetFileName(filename));

            Bitmap? bmp = null;
            if (Path.GetExtension(filename).ToLower().Equals(".dxf"))
                bmp = ConvertDXFFile(filename);
            else
                bmp = System.Drawing.Image.FromFile(filename) as Bitmap;


            UpdateProductImages(Guid.Empty, filename, bmp);

            Progress.Close();
            MessageBox.Show(string.Format("Imported [{0}] into [{1}]", Path.GetFileName(dlg.FileName), SelectedProducts()));
        }
    }

    private void SaveImageToFile_Click(object sender, RoutedEventArgs e)
    {
        var product = Items.SelectedItem as Product;
        if (product == null)
            return;

        var bmp = (Image.Source as BitmapImage).AsBitmap();
        var dlg = new SaveFileDialog();
        dlg.Filter = "Image Files (*.png)|*.png";
        dlg.FileName = product.Image.FileName;
        if (dlg.ShowDialog() == true)
            bmp.Save(dlg.FileName);
    }

    private void CopyImageToClipboard_Click(object sender, RoutedEventArgs e)
    {
        var product = Items.SelectedItem as Product;
        if (product == null)
            return;

        var bmp = (Image.Source as BitmapImage).AsBitmap();
        var data = new Tuple<Guid, string, Bitmap>(
            product.Image.ID,
            product.Image.FileName,
            bmp
        );
        Clipboard.SetData("ProductImage", data);
    }

    private void PasteImageFromClipboard_Click(object sender, RoutedEventArgs e)
    {
        if (Items.SelectedItem is not Product product)
            return;

        if (MessageBox.Show("Are you sure you wish to update the image for the selected product?", "Update Image", MessageBoxButton.YesNo,
                MessageBoxImage.Question) != MessageBoxResult.Yes)
            return;

        Progress.Show("Updating Images");

        var id = Guid.Empty;
        var filename = "";
        Bitmap? bitmap = null;

        if (Clipboard.ContainsData("ProductImage"))
        {
            if(Clipboard.GetData("ProductImage") is Tuple<Guid, string, Bitmap> data)
            {
                id = data.Item1;
                filename = data.Item2;
                bitmap = data.Item3;
            }
        }
        else if (Clipboard.ContainsImage())
        {
            var data = Clipboard.GetImage();
            bitmap = data.AsBitmap2();

            filename = string.Format("clip{0:yyyyMMddhhmmss}.png", DateTime.Now);
            if (Clipboard.ContainsFileDropList())
            {
                var list = Clipboard.GetFileDropList();
                if (list.Count > 0)
                    filename = Path.ChangeExtension(Path.GetFileName(list[0]), ".png");
            }

            //filename = String.Format("clip{0:yyyyMMddhhmmss}.png",DateTime.Now);
            //bitmap.Save(filename);
            id = Guid.Empty;
        }

        if (bitmap == null)
        {
            MessageBox.Show("Unable to paste data from clipboard");
            return;
        }

        Progress.Show("");
        UpdateProductImages(id, filename, bitmap);
        Progress.Close();

        MessageBox.Show(string.Format("Pasted [{0}] into [{1}]", Path.GetFileName(filename), SelectedProducts()));
    }


    private void ClearImage_Click(object sender, RoutedEventArgs e)
    {
        if (MessageWindow.ShowYesNo("Are you sure you wish to clear the image for the selected product?", "Clear Image"))
            return;

        Progress.Show("Clearing Image");
        UpdateProductImages(Guid.Empty, "", null);
        Progress.Close();

        MessageBox.Show(string.Format("Cleared image from [{0}]", string.Join(", ", SelectedProducts())));
    }

    private void Grid_MouseMove(object sender, MouseEventArgs e)
    {
        if(sender is not Grid grid || grid.Tag is not Product product || e.LeftButton != MouseButtonState.Pressed)
        {
            return;
        }

        DragDrop.DoDragDrop(grid, product, DragDropEffects.Copy);
    }

    private void FilterButton_OnFilterRefresh()
    {
        Reload();
    }
}