using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media.Imaging;
using ThinkGeo.MapSuite.Core;
using ThinkGeo.MapSuite.WpfDesktopEdition;

namespace CSHowDoISamples
{
    public partial class AddAnInMemoryMarkerOverlay : UserControl
    {
        private Collection<Feature> drawingFeatures;
        private Marker draggingMarker;
        private Point lastPosition;
        private double resolution;

        public AddAnInMemoryMarkerOverlay()
        {
            InitializeComponent();

            drawingFeatures = new Collection<Feature>();
        }

        private void WpfMap_Loaded(object sender, RoutedEventArgs e)
        {
            wpfMap1.MapUnit = GeographyUnit.DecimalDegree;
            wpfMap1.CurrentExtent = new RectangleShape(-155.733, 95.60, 104.42, -81.9);
            wpfMap1.MouseMove += new System.Windows.Input.MouseEventHandler(wpfMap1_MouseMove);
            wpfMap1.MouseLeftButtonUp += new System.Windows.Input.MouseButtonEventHandler(wpfMap1_MouseLeftButtonUp);

            WorldMapKitWmsWpfOverlay worldMapKitOverlay = new WorldMapKitWmsWpfOverlay();
            wpfMap1.Overlays.Add(worldMapKitOverlay);

            InMemoryMarkerOverlay markerOverlay = new InMemoryMarkerOverlay();
            markerOverlay.Drawn += new EventHandler<DrawnOverlayEventArgs>(markerOverlay_Drawn);
            markerOverlay.Columns.Add(new FeatureSourceColumn("Name"));
            markerOverlay.ZoomLevelSet.ZoomLevel01.DefaultPointMarkerStyle.ImageSource = new BitmapImage(new Uri("/Resources/AQUA.png", UriKind.RelativeOrAbsolute));
            markerOverlay.ZoomLevelSet.ZoomLevel01.DefaultPointMarkerStyle.Width = 20;
            markerOverlay.ZoomLevelSet.ZoomLevel01.DefaultPointMarkerStyle.Height = 34;
            markerOverlay.ZoomLevelSet.ZoomLevel01.DefaultPointMarkerStyle.YScreenOffset = -17;
            markerOverlay.ZoomLevelSet.ZoomLevel01.DefaultPointMarkerStyle.ToolTip = "This is [#Name#].";
            markerOverlay.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
            wpfMap1.Overlays.Add("MarkerOverlay", markerOverlay);

            Feature newFeature = new Feature(-95.2806, 38.9554);
            newFeature.ColumnValues.Add("Name", "Lawrence");

            markerOverlay.FeatureSource.BeginTransaction();
            markerOverlay.FeatureSource.AddFeature(newFeature);
            markerOverlay.FeatureSource.CommitTransaction();

            wpfMap1.Refresh();
        }

        private void wpfMap1_MouseLeftButtonUp(object sender, System.Windows.Input.MouseButtonEventArgs e)
        {
            if (draggingMarker != null)
            {
                PointShape newPoint = new PointShape(draggingMarker.Position.X, draggingMarker.Position.Y);
                Feature draggingFeature = (Feature)draggingMarker.Tag;
                Feature newFeature = new Feature(newPoint.GetWellKnownBinary(), draggingFeature.Id);
                foreach (KeyValuePair<string, string> keyValue in newFeature.ColumnValues)
                {
                    newFeature.ColumnValues.Add(keyValue.Key, keyValue.Value);
                }

                InMemoryMarkerOverlay markerOverlay = (InMemoryMarkerOverlay)wpfMap1.Overlays["MarkerOverlay"];

                markerOverlay.FeatureSource.BeginTransaction();
                markerOverlay.FeatureSource.UpdateFeature(newFeature);
                markerOverlay.FeatureSource.CommitTransaction();

                draggingMarker = null;
            }
        }

        private void wpfMap1_MouseMove(object sender, System.Windows.Input.MouseEventArgs e)
        {
            if (draggingMarker != null)
            {
                Point currentPosition = e.GetPosition(wpfMap1);
                double offsetX = (currentPosition.X - lastPosition.X) * resolution;
                double offsetY = (currentPosition.Y - lastPosition.Y) * resolution;
                draggingMarker.Position = new Point(draggingMarker.Position.X + offsetX, draggingMarker.Position.Y - offsetY);
                draggingMarker.Draw(wpfMap1.CurrentExtent, wpfMap1.ActualWidth, wpfMap1.ActualHeight);

                lastPosition = currentPosition;
            }
        }

        private void markerOverlay_Drawn(object sender, DrawnOverlayEventArgs e)
        {
            InMemoryMarkerOverlay markerOverlay = (InMemoryMarkerOverlay)wpfMap1.Overlays["MarkerOverlay"];
            foreach (Marker marker in markerOverlay.OverlayCanvas.Children)
            {
                marker.MouseDown += new System.Windows.Input.MouseButtonEventHandler(marker_MouseDown);
            }
        }

        private void marker_MouseDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
        {
            draggingMarker = (Marker)sender;
            resolution = Math.Max(wpfMap1.CurrentExtent.Width / wpfMap1.ActualWidth, wpfMap1.CurrentExtent.Height / wpfMap1.ActualHeight);
            Point markerPosition = draggingMarker.Position;
            PointShape markerPositionShape = new PointShape(markerPosition.X, markerPosition.Y);

            InMemoryMarkerOverlay markerOverlay = (InMemoryMarkerOverlay)wpfMap1.Overlays["MarkerOverlay"];
            drawingFeatures = markerOverlay.FeatureSource.GetFeaturesInsideBoundingBox(wpfMap1.CurrentExtent, ReturningColumnsType.NoColumns);
            Feature draggingFeature = (from f in drawingFeatures
                                      where f.GetWellKnownText().Equals(markerPositionShape.GetWellKnownText())
                                      select f).First();

            draggingMarker.Tag = draggingFeature;
            lastPosition = e.GetPosition(wpfMap1);
            e.Handled = true;
        }
    }
}