using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Data;
using System.Windows.Media;
using System.Windows.Media.Imaging;

namespace AIStudio.Wpf.DiagramDesigner
{
    public class ConnectionDataConverter : IMultiValueConverter
    {
        static ConnectionDataConverter()
        {
            Instance = new ConnectionDataConverter();
        }

        public static ConnectionDataConverter Instance
        {
            get;
            private set;
        }

        public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
        {
            PathGeometry pathGeometry = new PathGeometry();
            //if (values[0] != null)
            //{
            //    List<ConnectorPoint> points = (List<ConnectorPoint>)values[0];

            //    PathFigure figure = new PathFigure();
            //    figure.StartPoint = points[0];
            //    if (values[1]?.ToString() == DrawMode.RadiusConnectingLine.ToString())
            //    {
            //        for (var i = 0; i < points.Count - 1; i++)
            //        {
            //            int current = i, last = i - 1, next = i + 1, next2 = i + 2;
            //            if (last == -1)
            //            {
            //                last = 0;
            //            }
            //            if (next == points.Count)
            //            {
            //                next = points.Count - 1;
            //            }
            //            if (next2 == points.Count)
            //            {
            //                next2 = points.Count - 1;
            //            }
            //            var bzs = SegmentHelper.GetBezierSegment(points[current], points[last], points[next], points[next2]);
            //            figure.Segments.Add(bzs);
            //        }

            //        //贝塞尔曲线的简单连接
            //        //var start = points[0];
            //        //var end = points.Last();
            //        //var width = end.X - start.X;
            //        //var height = end.Y - start.Y;
            //        //var ctrlPos = 0.382 * width + 0.309 * height;
            //        //figure.Segments.Add(new BezierSegment(new Point(ctrlPos - 1, 1), new Point(width - ctrlPos + 1, height - 1), new Point(width - 1, height - 1), true));
            //    }
            //    else
            //    {
            //        for (int i = 0; i < points.Count; i++)
            //        {

            //            LineSegment arc = new LineSegment(points[i], true);
            //            figure.Segments.Add(arc);
            //        }
            //    }

            //    pathGeometry.Figures.Add(figure);
            //}
            return pathGeometry;
        }

        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}