using ESRI.ArcGIS.Geometry;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace KGIS.PlatformPlugin.Commands.Tools.TraceTool
{
    public static class PointCollectionEx
    {
        public static System.Collections.Generic.Dictionary<int, System.Collections.Generic.List<IPoint>> Sort(this IPointCollection pPointCollection, IPoint pPointRelation)
        {
            if (pPointCollection == null)
            {
                return null;
            }
            int num = 1;
            System.Collections.Generic.Dictionary<int, System.Collections.Generic.List<IPoint>> dictionary = new System.Collections.Generic.Dictionary<int, System.Collections.Generic.List<IPoint>>();
            System.Collections.Generic.List<IPoint> list = new System.Collections.Generic.List<IPoint>();
            int i = 0;
            int pointCount = pPointCollection.PointCount;
            while (i < pointCount)
            {
                IPoint point = pPointCollection.get_Point(i);
                if (list.Count > 0 && point.IsSamePoint(list[0], 0.001))
                {
                    dictionary.Add(num, list);
                    list = new System.Collections.Generic.List<IPoint>();
                    num++;
                }
                else
                {
                    list.Add(point);
                }
                i++;
            }
            int j = 1;
            int count = dictionary.Count;
            while (j <= count)
            {
                System.Collections.Generic.List<double> list2 = new System.Collections.Generic.List<double>();
                list = dictionary[j];
                int num2 = 0;
                while (list.Count > num2)
                {
                    IPoint other = list[num2];
                    double item = (pPointRelation as IProximityOperator).ReturnDistance(other);
                    list2.Add(item);
                    num2++;
                }
                int num3 = list2.IndexOf(list2.Min());
                System.Collections.Generic.List<IPoint> list3 = new System.Collections.Generic.List<IPoint>();
                int k = 0;
                int count2 = list.Count;
                while (k < count2)
                {
                    int index;
                    if (k + num3 >= count2)
                    {
                        index = k + num3 - count2;
                    }
                    else
                    {
                        index = k + num3;
                    }
                    list3.Add(list[index]);
                    k++;
                }
                dictionary.Remove(j);
                dictionary.Add(j, list3);
                j++;
            }
            return dictionary;
        }
        public static int GetLongestLineSegmentStartPoint(this IPointCollection pPointCollection)
        {
            if (pPointCollection != null && pPointCollection.PointCount >= 2)
            {
                int result = -1;
                double num = 0.0;
                int i = 0;
                int pointCount = pPointCollection.PointCount;
                while (i < pointCount - 1)
                {
                    IProximityOperator proximityOperator = pPointCollection.get_Point(i) as IProximityOperator;
                    IPoint other = pPointCollection.get_Point(i + 1);
                    double num2 = proximityOperator.ReturnDistance(other);
                    if (num < num2)
                    {
                        num = num2;
                        result = i;
                    }
                    i++;
                }
                return result;
            }
            return -1;
        }
    }
}