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

namespace _2018_05
{
    class Program
    {
        static void Main(string[] args)
        {
            int removes = 0;
            string resTab = File.ReadAllText(@"..\..\..\Data\Adventofcode_181205\2018_05_data.txt");
            //string resTab = "dabAcCaCBAcCcaDA";



            int varv = 0;

            string nextStr = nextLevelStr(resTab,ref removes, ref varv);
            while (removes > 0)
            {
                nextStr= nextLevelStr(nextStr, ref removes, ref varv);
            }

            WriteLine($"Resulterande sträng : {nextStr} , {nextStr.Length} tkn");
            ReadKey();
            
        }

        private static string nextLevelStr(string resTab,ref int removes, ref int varv)
        {
            string tmp = "";
            removes = 0;
            WriteLine($"inLängd: {resTab.Length}");
            foreach(char tkn in resTab.ToCharArray())
            {
                tmp += tkn;
                if (tmp.Length > 1)
                {
                    string v = tmp.Substring(tmp.Length - 2, 1);
                    string z = tmp.Substring(tmp.Length - 1, 1);

                    if ((v.ToUpper()== v && z.ToLower() == z || (z.ToUpper() == z && v.ToLower() == v))
                        && (v.ToUpper() == z.ToUpper()))
                    {
                        if (tmp.Length > 2)
                        {
                            tmp = tmp.Substring(0, tmp.Length - 2);
                            removes++;
                        }
                        else tmp = "";
                    }
                }
            }
            WriteLine($"varv {++varv} ; aktuell längd: {tmp.Length} removes = {removes}");
            return tmp;
        }
    }
}