using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Ips.Library.Entity
{
    public class GeoLine
    {
        public GeoLine()
        {
            Points = new List<GeoLLA>();
        }

        public List<GeoLLA> Points { get; set; }

        public string ToString(string pointsep)
        {
            return string.Join(pointsep, Points);
        }

        public static GeoLine FromString(string val, string itemsep = ",", string pointsep = ";")
        {
            var strPoints = val.Split(pointsep.ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
            GeoLine line = new GeoLine();
            for (int i = 0; i < strPoints.Length; i++)
            {
                var geoPoint = GeoLLA.FromString(strPoints[i], itemsep);
                line.Points.Add(geoPoint);
            }
            return line;
        }

        public static List<GeoLine> FromListString(string val, string itemsep = ",", string pointsep = ";", string linesep = "\r\n")
        {
            var lineStrArr = val.Split(linesep.ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
            List<GeoLine> lines = new List<GeoLine>();
            foreach (var linestr in lineStrArr)
            {
                var line = FromString(linestr, itemsep, pointsep);
                lines.Add(line);
            }
            return lines;
        }
    }

    public static class GeoLineExtensions
    {
        public static string ToLinesString(this IEnumerable<GeoLine> lines, string pointsep = ";", string linesep = "\r\n")
        {
            return string.Join(linesep, lines.Select(line => line.ToString(pointsep)));
        }
    }
}