using System;
using System.Globalization;
using ThinkGeo.MapSuite.Core;
using ThinkGeo.MapSuite.WpfDesktopEdition;

namespace Distance
{
    public class MeasureTrackInteractiveOverlay : TrackInteractiveOverlay
    {
        public MeasureTrackInteractiveOverlay()
            : base()
        {
            TrackShapeLayer.Open();
            TrackShapeLayer.Columns.Add(new FeatureSourceColumn("length"));
            TrackShapeLayer.ZoomLevelSet.ZoomLevel01.DefaultLineStyle = LineStyles.CreateSimpleLineStyle(GeoColor.FromArgb(150, GeoColor.StandardColors.DarkRed), 4, false);
            TrackShapeLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.CreateSimpleAreaStyle(GeoColor.FromArgb(150, GeoColor.StandardColors.DarkRed), GeoColor.FromArgb(200, GeoColor.StandardColors.DarkRed), 1);
            TrackShapeLayer.ZoomLevelSet.ZoomLevel01.DefaultTextStyle = new TextStyle("length", new GeoFont("Arial", 10, DrawingFontStyles.Bold), new GeoSolidBrush(GeoColor.SimpleColors.Black));
            TrackShapeLayer.ZoomLevelSet.ZoomLevel01.DefaultTextStyle.TextLineSegmentRatio = 100;
            TrackShapeLayer.ZoomLevelSet.ZoomLevel01.DefaultTextStyle.YOffsetInPixel = 10;
            TrackShapeLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;

            ThinkGeo.MapSuite.WpfDesktopEdition.Tile tile = new LayerTile();
            tile.IsAsync = false;
            OverlayCanvas.Children.Add(tile);
        }

        protected override void DrawCore(RectangleShape targetExtent, RefreshType refreshType)
        {
            UpdateTrackingFeature();
            base.DrawCore(targetExtent, refreshType);
        }

        private void UpdateTrackingFeature()
        {
            if (TrackShapeLayer.InternalFeatures.Count > 0)
            {
                Feature feature = TrackShapeLayer.InternalFeatures[0];
                BaseShape shape = feature.GetShape();
                WellKnownType wkType = shape.GetWellKnownType();
                if (wkType == WellKnownType.Line)
                {
                    double length = ((LineShape)shape).GetLength(GeographyUnit.DecimalDegree, DistanceUnit.Feet);
                    feature.ColumnValues["length"] = String.Format(CultureInfo.InvariantCulture, "{0} feet", length);
                }
                else if (wkType == WellKnownType.Polygon)
                {
                    double area = ((PolygonShape)shape).GetArea(GeographyUnit.DecimalDegree, AreaUnit.SquareFeet);
                    feature.ColumnValues["length"] = String.Format(CultureInfo.InvariantCulture, "{0} square feet", area);
                }
                else
                {
                    feature.ColumnValues["length"] = String.Empty;
                }
            }
        }
    }
}