using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using Autodesk;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.EditorInput;
using Autodesk.AutoCAD.Geometry;
using Autodesk.AutoCAD.Runtime;

namespace ZaznaczeniePoligonalne
{
    public class Class1
    {


        [CommandMethod("sel")]
        public void MySelection()
        {
            var listaPunktow = new List<Point3d>();

            Document doc = Application.DocumentManager.MdiActiveDocument;
            //The DocumentManager property of the Application object allows you to access the current document with the MdiActiveDocument property
            Editor ed = doc.Editor;
            Database db = doc.Database;
            var flags = BindingFlags.Public | BindingFlags.Instance | BindingFlags.Static | BindingFlags.DeclaredOnly;
            using (Transaction acTrans = db.TransactionManager.StartTransaction())
            {
                PromptSelectionResult acSSPrompt = doc.Editor.GetSelection();
                if (acSSPrompt.Status == PromptStatus.OK)
                {
                    SelectionSet acSSet = acSSPrompt.Value;

                    foreach (SelectedObject acSSObj in acSSet)
                    {
                        if (acSSObj != null)
                        {
                            Entity acEnt = acTrans.GetObject(acSSObj.ObjectId,
                                                                OpenMode.ForWrite) as Entity;
                            var type = acEnt.GetType();
                            // https://stackoverflow.com/questions/1196991/get-property-value-from-string-using-reflection-in-c-sharp
                            var center = type.GetProperty("Center");
                            if (center == null)
                            {
                                ed.WriteMessage("Nie ma center");
                            }
                            else
                            {
                                Point3d centerxD = (Point3d)center.GetValue(acEnt, null);
                                listaPunktow.Add(centerxD);
                            }
                        }
                    }
                }
            }

            Point3dCollection pntCol = new Point3dCollection();

            foreach (var punkt in listaPunktow)
            {
                pntCol.Add(punkt);
            }

            int numOfEntsFound = 0;
            PromptSelectionResult pmtSelRes = null;

            TypedValue[] typedVal = new TypedValue[1];
            var gowno = new TypedValue[0];

            typedVal[0] = new TypedValue((int)DxfCode.Start, "Line");
            SelectionFilter selFilter = new SelectionFilter(gowno);
            //PromptSelectionResult prSelRes = ed.SelectCrossingPolygon(pc.Collect());
            pmtSelRes = ed.SelectCrossingPolygon(pntCol, selFilter);

            if (pmtSelRes.Status == PromptStatus.OK)
            {
                using (Transaction acTrans = db.TransactionManager.StartTransaction())
                {
                    foreach (ObjectId objId in
                    pmtSelRes.Value.GetObjectIds())
                    {
                        Entity acEnt = acTrans.GetObject(objId, OpenMode.ForWrite) as Entity;
                        bool allow = true;
                        var type = acEnt.GetType();
                        // https://stackoverflow.com/questions/1196991/get-property-value-from-string-using-reflection-in-c-sharp
                        var center = type.GetProperty("Center");
                        if (center == null)
                        {
                            ed.WriteMessage("Nie ma center");
                        }
                        else
                        {
                            Point3d centerxD = (Point3d)center.GetValue(acEnt, null);
                            if (listaPunktow.Contains(centerxD))
                            {
                                allow = false;
                            }
                        }


                        //http://www.temblast.com/songview/color3.htm
                        if (allow)
                        {
                            acEnt.ColorIndex = 150;
                        }

                        numOfEntsFound++;
                    }
                    acTrans.Commit();
                }
                ed.WriteMessage("\nZnaleziono: " + numOfEntsFound.ToString());
                ed.Regen();
            }

            else
                ed.WriteMessage("\nNie znaleziono");

        }

    }
}