using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Documents;
using System.Windows.Media;
using HTMLConverter;
using InABox.WPF;
using NPOI.OpenXmlFormats.Spreadsheet;
using NPOI.OpenXmlFormats.Wordprocessing;
using Syncfusion.Windows.Controls.RichTextBoxAdv;
using Color = System.Windows.Media.Color;
using Image = System.Windows.Controls.Image;
using Inline = System.Windows.Documents.Inline;

namespace InABox.DynamicGrid
{
    public delegate void RichTextEditorChanged(object sender);

    /// <summary>
    ///     Interaction logic for RichTextEditorControl.xaml
    /// </summary>
    public partial class RichTextEditor : UserControl
    {
        public static readonly DependencyProperty HideToolbarProperty =
            DependencyProperty.Register(nameof(HideToolbar), typeof(bool), typeof(RichTextEditor));

        public static readonly DependencyProperty ZoomFactorProperty =
            DependencyProperty.Register(nameof(ZoomFactor), typeof(double), typeof(RichTextEditor));

        public static readonly DependencyProperty ColorProperty =
            DependencyProperty.Register(
                "Color",
                typeof(Color),
                typeof(RichTextEditor),
                new PropertyMetadata(default(Color), OnBackgroundPropertyChanged));

        private bool bdirty;
        private bool bLoaded;
        private bool bReady;
        private string curvalue = "";


        public RichTextEditor()
        {
            InitializeComponent();

            DataContext = new RichTextEditorViewModel();

            ConfigureButton(BoldBtn, Properties.Resources.Bold16);
            ConfigureButton(ItalicBtn, Properties.Resources.Italic16);
            ConfigureButton(UnderlineBtn, Properties.Resources.Underline16);

            ConfigureButton(AlignLeftBtn, Properties.Resources.AlignTextLeft16);
            ConfigureButton(AlignCenterBtn, Properties.Resources.AlignTextCenter16);
            ConfigureButton(AlignRightBtn, Properties.Resources.AlignTextRight16);
            ConfigureButton(AlignJustifyBtn, Properties.Resources.AlignTextJustify16);

            ConfigureButton(HyperlinkBtn, Properties.Resources.Hyperlink16);
            /*Bold.SmallIcon = Properties.Resources.Bold16.AsBitmapImage(16, 16);
            Italic.SmallIcon = Properties.Resources.Italic16.AsBitmapImage(16, 16);
            Underline.SmallIcon = Properties.Resources.Underline16.AsBitmapImage(16, 16);
            AlignLeft.SmallIcon = Properties.Resources.AlignTextLeft16.AsBitmapImage(16, 16);
            AlignCentre.SmallIcon = Properties.Resources.AlignTextCenter16.AsBitmapImage(16, 16);
            AlignRight.SmallIcon = Properties.Resources.AlignTextRight16.AsBitmapImage(16, 16);
            AlignJustify.SmallIcon = Properties.Resources.AlignTextJustify16.AsBitmapImage(16, 16);
            Hyperlink.SmallIcon = Properties.Resources.Hyperlink16.AsBitmapImage(16, 16);
            Picture.SmallIcon = Properties.Resources.Picture16.AsBitmapImage(16, 16);
            Table.SmallIcon = Properties.Resources.Table16.AsBitmapImage(16, 16);
            ZoomIn.SmallIcon = Properties.Resources.zoomin.AsBitmapImage(16, 16);
            ZoomOut.SmallIcon = Properties.Resources.zoomout.AsBitmapImage(16, 16);*/
            /*Editor.CaretBrush = new SolidColorBrush(Colors.Black);
            Editor.FontFamily = new FontFamily("Calibri");
            Editor.FontSize = 12.0F;
            Editor.Foreground = new SolidColorBrush(Colors.Black);*/
            ZoomFactor = 150;
            //Text = "";
        }

        private void ConfigureButton(ButtonBase button, Bitmap image)
        {
            button.Content = new Image { Source = image.AsBitmapImage(16, 16), Width = 16, Height = 16 };
        }

        public bool HideToolbar
        {
            get => (bool)GetValue(HideToolbarProperty);
            set
            {
                SetValue(HideToolbarProperty, value);
                Toolbar.Visibility = value ? Visibility.Collapsed : Visibility.Visible;
            }
        }

        public double ZoomFactor
        {
            get => (double)GetValue(ZoomFactorProperty);
            set
            {
                SetValue(ZoomFactorProperty, value);
                //Editor.ZoomFactor = value;
            }
        }

        public string Text
        {
            get => Save();
            set => Load(value);
        }

        public RichTextEditorChanged OnChanged { get; set; }

        public Color Color
        {
            get => (Color)GetValue(ColorProperty);
            set
            {
                SetValue(ColorProperty, value);
                //Editor.Background = new SolidColorBrush(value);
            }
        }

        public void Load(string content)
        {
            if (content == null)
                content = "";

            content = content.Replace("background:#000000", "").Replace("background:NoColor;", "");
            var xaml = content;
            if (xaml.StartsWith("<html>"))
            {
                xaml = HtmlToXamlConverter.ConvertHtmlToXaml(xaml, false);
            }
            var ms = new MemoryStream(Encoding.ASCII.GetBytes(xaml));
            var range = new TextRange(RtbEditor.Document.ContentStart, RtbEditor.Document.ContentEnd);
            range.Load(ms, DataFormats.Text);
            //Editor.Load(ms, FormatType.Html);
            VerticalAlignment = VerticalAlignment.Top;
            VerticalAlignment = VerticalAlignment.Stretch;

            curvalue = content;
            bdirty = false;
            bLoaded = true;
        }

        public string Save()
        {
            if (bdirty)
            {
                var ms = new MemoryStream();
                //Editor.Save(ms, FormatType.Html);
                var range = new TextRange(RtbEditor.Document.ContentStart, RtbEditor.Document.ContentEnd);
                range.Save(ms, DataFormats.Xaml);
                var reader = new StreamReader(ms);
                curvalue = Encoding.UTF8.GetString(ms.GetBuffer());
                curvalue = curvalue.Replace("background:#000000", "");

                bdirty = false;
            }

            return curvalue;
        }

        private void RichTextBoxAdv_ContentChanged(object obj, ContentChangedEventArgs args)
        {
            bdirty = true;
        }

        public void SetColor(Color color)
        {
            //Editor.Background = new SolidColorBrush(color);
        }

        private static void OnBackgroundPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            var source = d as RichTextEditor;
            source.SetColor((Color)e.NewValue);
        }


        private void RichTextBoxAdv_LostFocus(object sender, RoutedEventArgs e)
        {
            if (bReady)
                OnChanged?.Invoke(this);
            bReady = true;
        }

        private void ZoomIn_Click(object sender, RoutedEventArgs e)
        {
            //Editor.ZoomFactor = Editor.ZoomFactor * 1.5F;
        }

        private void ZoomOut_Click(object sender, RoutedEventArgs e)
        {
            //Editor.ZoomFactor = Editor.ZoomFactor / 1.5F;
        }

        private void Editor_RequestNavigate(object obj, RequestNavigateEventArgs args)
        {
            var processStartInfo = new ProcessStartInfo(args.Hyperlink.NavigationLink);
            processStartInfo.UseShellExecute = true;
            Process.Start(processStartInfo);
        }

        private bool SelectionHasProperty(DependencyProperty property, object? value)
        {
            var temp = RtbEditor.Selection.GetPropertyValue(property);
            return temp != DependencyProperty.UnsetValue && temp.Equals(value);
        }
        private object? SelectionProperty(DependencyProperty property)
        {
            return RtbEditor.Selection.GetPropertyValue(property);
        }

        private void UpdateButtons()
        {
            BoldBtn.IsChecked = SelectionHasProperty(Inline.FontWeightProperty, FontWeights.Bold);
            ItalicBtn.IsChecked = SelectionHasProperty(Inline.FontStyleProperty, FontStyles.Italic);
            UnderlineBtn.IsChecked = SelectionHasProperty(Inline.TextDecorationsProperty, TextDecorations.Underline);

            AlignLeftBtn.IsChecked = SelectionHasProperty(FlowDocument.TextAlignmentProperty, TextAlignment.Left);
            AlignCenterBtn.IsChecked = SelectionHasProperty(FlowDocument.TextAlignmentProperty, TextAlignment.Center);
            AlignRightBtn.IsChecked = SelectionHasProperty(FlowDocument.TextAlignmentProperty, TextAlignment.Right);
            AlignJustifyBtn.IsChecked = SelectionHasProperty(FlowDocument.TextAlignmentProperty, TextAlignment.Justify);

            FontFamilyComboBox.SelectedItem = SelectionProperty(FlowDocument.FontFamilyProperty);
            FontSizeComboBox.Text = SelectionProperty(FlowDocument.FontSizeProperty)?.ToString();
        }

        private void RtbEditor_SelectionChanged(object sender, RoutedEventArgs e)
        {
            UpdateButtons();
        }

        private void fontFamilyCombo_SelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
        {
            if(FontFamilyComboBox.SelectedItem != null)
            {
                RtbEditor.Selection.ApplyPropertyValue(FlowDocument.FontFamilyProperty, FontFamilyComboBox.SelectedItem);
            }
        }

        private void fontSizeCombo_TextChanged(object sender, TextChangedEventArgs e)
        {
            var currentValue = SelectionProperty(FlowDocument.FontSizeProperty)?.ToString();

            var fontSize = FontSizeComboBox.Text;
            if(double.TryParse(fontSize, out var size))
            {
                RtbEditor.Selection.ApplyPropertyValue(FlowDocument.FontSizeProperty, size);
            }
            else
            {
                FontSizeComboBox.Text = currentValue;
            }
        }

        private void RtbEditor_TextChanged(object sender, TextChangedEventArgs e)
        {
            UpdateButtons();
        }

        private void HyperlinkBtn_Click(object sender, RoutedEventArgs e)
        {
            var selection = RtbEditor.Selection.Text;
        }
    }
}