using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace JavaCode.cs
{
    public class TerrainHelper
    {
        public static void RemoveTerrain()
        {
            char[] chars = new char[] { ',' };
            string folder = @"E:\data\35.ty\terrain";
            string[] strs = File.ReadAllLines(folder + "\\layer.json");

            int i = -1;
            foreach (string str in strs)
            {
                if (!str.Contains("[ {")) continue;

                i++;
                if (i < 5 || i > 12) continue;

                //   ,[ { "startX": 6604, "startY": 2834, "endX": 6702, "endY": 2975 } ]
                string[] vals = str.Replace("startX", "").Replace("startY", "").Replace("endX", "").Replace("endY", "").Replace("[ {", "").Replace("} ]", "").Replace("\"", "").Replace(":", "").Replace(" ", "").Split(chars, StringSplitOptions.RemoveEmptyEntries);

                int startX = int.Parse(vals[0]), startY = int.Parse(vals[1]), endX = int.Parse(vals[2]), endY = int.Parse(vals[3]);
                RemoveFiles(folder, i, startX, endX, startY, endY);
            }
        }

        private static void RemoveFiles(string folder, int level, int startX, int endX, int startY, int endY)
        {
            string path = Path.Combine(folder, level.ToString());
            if (!Directory.Exists(path)) return;

            string[] dirs = Directory.GetDirectories(path, "*", SearchOption.TopDirectoryOnly);
            foreach (string dir in dirs)
            {
                string dirName = Path.GetFileName(dir);

                int d = 0;
                if (!int.TryParse(dirName, out d))
                {
                    Directory.Delete(dir, true);
                    continue;
                }

                if (d < startX || d > endX)
                {
                    Directory.Delete(dir, true);
                    continue;
                }

                string[] files = Directory.GetFiles(dir);
                foreach (string file in files)
                {
                    string fileName = Path.GetFileName(file).Replace(".terrain", "");

                    int f= 0;
                    if (!int.TryParse(fileName, out f))
                    {
                        File.Delete(file);
                        continue;
                    }

                    if (f < startY || f > endY)
                    {
                        File.Delete(file);
                    }
                }
            }
        }
    }
}