using System.Linq;
using DelftTools.Shell.Gui;
using DelftTools.Utils.Collections;
using DeltaShell.Plugins.SharpMapGis.Gui.Forms;
using GisSharpBlog.NetTopologySuite.Geometries;
using SharpMap.Api.Layers;

namespace DeltaShell.Plugins.SharpMapGis.Gui.Commands
{
    public class ZoomLayerCommand : MapViewCommand, IGuiCommand
    {
        protected override void OnExecute(params object[] arguments)
        {
            // parameter 0 must be a layer
            ILayer layer = (arguments[0] is ILayer)? arguments[0] as ILayer : null;
            if (layer == null) return;

            var manager = Gui.DocumentViews;
            
            // find the correct mapview
            var mapView = manager.GetActiveViews<MapView>().FirstOrDefault(v => Equals(v.Data, layer.Map));

            if (mapView == null)
                return;

            var envelope = new Envelope();
            SharpMap.Map.GetLayers(new[] { layer }, false, false).ForEach(l => envelope.ExpandToInclude(l.Envelope));

            if (envelope.IsNull) 
                return;

            mapView.Map.ZoomToFit(envelope, true);
            mapView.MapControl.Refresh();
        }

        public IGui Gui { get; set; }
    }
}