using System.Collections.Generic;
using System.IO;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;

namespace Compdfkit_Tools.PDFControl
{
    /// <summary>
    /// CPDFSignControl.xaml 的交互逻辑
    /// </summary>
    public partial class FillDigitalSignatureControl : UserControl
    {
        private Dictionary<string,Border> TabDict { get; set; }
        public FillDigitalSignatureControl()
        {
            InitializeComponent();
            TabDict=new Dictionary<string,Border>();
            TabDict["Keyboard"] = KeyboardBorder;
            TabDict["Trackpad"] = TrackpadBorder;
            TabDict["Image"] = ImageBorder;
            TabDict["None"] = NoneBorder;
            SetCheckedTab("Keyboard");
        }

        private void TextAlignBtn_Click(object sender, RoutedEventArgs e)
        {
            ToggleButton checkBtn=sender as ToggleButton;
            if(checkBtn == null)
            {
                return;
            }
            checkBtn.IsChecked = true;
            if(checkBtn!= TextAlignLeftBtn)
            {
                TextAlignLeftBtn.IsChecked= false;
            }
            if (checkBtn != TextAlignRightBtn)
            {
                TextAlignRightBtn.IsChecked = false;
            }
        }

        private void Border_MouseDown(object sender, MouseButtonEventArgs e)
        {
            Border clickBorder = sender as Border;
            if(clickBorder == null || clickBorder.Tag==null)
            {
                return;
            }
            SetCheckedTab(clickBorder.Tag.ToString());
            ImagePickPanel.Visibility = Visibility.Hidden;
            if (clickBorder== TrackpadBorder)
            {
                CanvaDrawPopup.Visibility = Visibility.Visible;
            }

            if(clickBorder== ImageBorder)
            {
                ImagePickPanel.Visibility = Visibility.Visible;
            }
        }

        private void SetCheckedTab(string tab)
        {
            if (TabDict != null && TabDict.ContainsKey(tab))
            {
                foreach (string key in TabDict.Keys)
                {
                    Border checkBorder = TabDict[key];
                    if(checkBorder == null)
                    {
                        continue;
                    }

                    checkBorder.BorderThickness = new Thickness(0);
                    if(key==tab)
                    {
                        checkBorder.BorderThickness = new Thickness(0, 0, 0, 2);
                    }
                }
            }
        }

        private void CanvasPopupClose_Click(object sender, RoutedEventArgs e)
        {
            CanvaDrawPopup.Visibility = Visibility.Collapsed;
        }

        private void CanvasClearBtn_Click(object sender, RoutedEventArgs e)
        {
            DrawInkCanvas.Strokes.Clear();
        }

        public void GetDrawInk()
        {
            if (DrawInkCanvas != null && DrawInkCanvas.Strokes != null && DrawInkCanvas.Strokes.Count > 0)
            {
                Rect bound= DrawInkCanvas.Strokes.GetBounds();
                DrawingVisual drawVisual = new DrawingVisual();
                DrawingContext drawContext= drawVisual.RenderOpen();

                foreach (Stroke drawStroke in DrawInkCanvas.Strokes)
                {
                    Pen drawPen = new Pen(new SolidColorBrush(drawStroke.DrawingAttributes.Color), drawStroke.DrawingAttributes.Width);
                    PathGeometry drawPath = new PathGeometry();
                    PathFigureCollection Figures = new PathFigureCollection();
                    PathFigure AddFigure = new PathFigure();
                    Figures.Add(AddFigure);
                    drawPath.Figures = Figures;

                    if(drawStroke.StylusPoints.Count>1)
                    {
                        StylusPoint startPoint= drawStroke.StylusPoints[0];
                        AddFigure.StartPoint= new Point(startPoint.X - bound.X, startPoint.Y - bound.Y);
                        for (int i = 1;i< drawStroke.StylusPoints.Count;i++)
                        {
                            StylusPoint drawPoint = drawStroke.StylusPoints[i];
                            Point offsetPoint = new Point(drawPoint.X - bound.X, drawPoint.Y - bound.Y);
                            LineSegment drawSegment = new LineSegment();
                            drawSegment.Point = offsetPoint;
                            AddFigure.Segments.Add(drawSegment);
                        }
                    }

                    if(AddFigure.Segments.Count > 0)
                    {
                        drawContext.DrawGeometry(null, drawPen, drawPath);
                    }
                }
                drawContext.Close();

                RenderTargetBitmap renderBitmap=new RenderTargetBitmap((int)bound.Width,(int)bound.Height,96,96,PixelFormats.Pbgra32);
                renderBitmap.Render(drawVisual);
            }
        }

        private void ReasonCheckBox_Click(object sender, RoutedEventArgs e)
        {
            CheckBox checkItem = sender as CheckBox;
            if (checkItem == null)
            {
                return;
            }

            ReasonPanel.Visibility=checkItem.IsChecked==true? Visibility.Visible: Visibility.Collapsed;
        }
    }
}