using System;
using System.Collections.Generic;
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.Core;
using InABox.Dxf;
using InABox.WPF;
using Microsoft.Win32;

namespace PRSDesktop
{
    /// <summary>
    ///     Interaction logic for ProductLookup.xaml
    /// </summary>
    public partial class ProductLookupDock : UserControl, IDockPanel
    {
        private ProductHoldingControl _holdings;

        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 void Search_TextChanged(object sender, TextChangedEventArgs e)
        {
        }

        private void Search_KeyUp(object sender, KeyEventArgs e)
        {
            if (e.Key == Key.Enter)
            {
                var search = Search.Text;
                if (!string.IsNullOrEmpty(search))
                {
                    using (new WaitCursor())
                    {
                        var products = new Client<Product>().Query(
                            new Filter<Product>(x => x.Code).Contains(Search.Text).Or(x => x.Name)
                                .Contains(search), //.And(x => x.Image.ID).IsNotEqualTo(Guid.Empty),
                            new Columns<Product>(x => x.ID, x => x.Code, x => x.Name, x => x.Image.ID, x => x.Image.FileName),
                            new SortOrder<Product>(x => x.Code)
                        );

                        var items = new List<PDI>();
                        foreach (var row in products.Rows)
                        {
                            var item = new PDI
                            {
                                ID = row.Get<Product, Guid>(x => x.ID),
                                Code = row.Get<Product, string>(x => x.Code),
                                Name = row.Get<Product, string>(x => x.Name),
                                ImageID = row.Get<Product, Guid>(x => x.Image.ID),
                                ImageName = row.Get<Product, string>(x => x.Image.FileName)
                            };
                            items.Add(item);
                        }

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

                        ;
                    }
                }
                else
                {
                    Items.ItemsSource = null;
                    Image.Source = null;
                }
            }
            else if (e.Key == Key.Down)
            {
                if (Items.ItemsSource != null)
                {
                    var items = Items.ItemsSource as List<PDI>;
                    if (items.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;
            var productid = Guid.Empty;
            if (e.AddedItems.Count > 0)
            {
                var item = e.AddedItems[0] as PDI;
                productid = item.ID;
                if (!item.ImageID.Equals(Guid.Empty))
                    new Client<Document>().Query(
                        new Filter<Document>(x => x.ID).IsEqualTo(item.ImageID),
                        new Columns<Document>(x => x.ID, x => x.Data),
                        null,
                        (docs, error) =>
                        {
                            var row = docs.Rows.FirstOrDefault();
                            if (row != null)
                            {
                                var id = row.Get<Document, Guid>(x => x.ID);
                                var ms = new MemoryStream(row.Get<Document, byte[]>(x => x.Data));
                                var bmp = new Bitmap(ms);
                                Dispatcher.BeginInvoke(
                                    new Action<Guid>(o =>
                                    {
                                        if (Items.SelectedValue != null)
                                        {
                                            var sel = (PDI)Items.SelectedValue;
                                            if (sel.ImageID == o)
                                                Image.Source = bmp.AsBitmapImage(false);
                                        }
                                    }), id
                                );
                            }
                        }
                    );
                else
                    Image.Source = null;
            }
            else
            {
                Image.Source = null;
            }

            if (Security.CanView<StockLocation>())
            {
                _holdings.ParentID = productid;
                _holdings.Refresh(false, true);
            }
        }

        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 PDI;

            var anyproducts = pdi != null;
            var validimage = pdi != null && pdi.ImageID != 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 pdi = Items.SelectedItem as PDI;
            return pdi != null ? pdi.Code : "";
        }

        private void UpdateProductImages(Guid id, string filename, Bitmap bitmap)
        {
            var pdi = Items.SelectedItem as PDI;
            if (pdi == 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),
                    new Columns<Document>(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;
            }

            var product = new Product { ID = pdi.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) => { });

            pdi.ImageID = docid;
            pdi.ImageName = Path.GetFileName(filename);

            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, Path.GetFileNameWithoutExtension(filename));
                }
                catch (Exception e)
                {
                    MessageBox.Show(e.Message);
                    result = null;
                }
            }

            return result;
        }

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

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

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

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

        private void PasteImageFromClipboard_Click(object sender, RoutedEventArgs e)
        {
            var pdi = Items.SelectedItem as PDI;
            if (pdi == null)
                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"))
            {
                var data = Clipboard.GetData("ProductImage") as Tuple<Guid, string, Bitmap>;
                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 (MessageBox.Show("Are you sure you wish to clear the image for the selected product?", "Clear Image", MessageBoxButton.YesNo,
                    MessageBoxImage.Question) != MessageBoxResult.Yes)
                return;

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

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

        private class PDI
        {
            public string Code { get; set; }
            public string Name { get; set; }
            public Guid ImageID { get; set; }
            public string ImageName { get; set; }
            public Guid ID { get; set; }
        }
    }
}