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

namespace _2017_01
{
    class Program
    {
        static void Main(string[] args)
        {
            var Indata = File.ReadAllText(@"I:\Adventofcode_171201\data171201.txt");
            //var Indata = "1212";


            MethodOne(Indata);
            MethodTwo(Indata);

        }

        private static void MethodOne(string Indata)
        {
            int value = 0;
            char lastFig = ' ';
            char firstFig = ' ';
            foreach (var figure in Indata.ToCharArray())
            {
                if (lastFig == ' ')
                {
                    firstFig = figure;
                }
                if (figure == lastFig)
                {
                    value += int.Parse(figure.ToString());
                }
                lastFig = figure;
            }

            if (firstFig == lastFig)
            {
                value += int.Parse(lastFig.ToString());
            }

            System.Console.WriteLine("--Method 1--");
            System.Console.WriteLine($"---{value}---");
            System.Console.WriteLine("----------------");
        }

        private static void MethodTwo(string Indata)
        {
            int value = 0;
         //   char lastFig = ' ';
         //   char firstFig = ' ';
            int locPos = 0;
            char[] characters = Indata.ToCharArray();
            foreach (var figure in characters)
            {
                if (figure == jmfChar(characters,locPos))
                {
                    value += int.Parse(figure.ToString());
                }
                locPos++;
            }

            System.Console.WriteLine("--Method 2--");
            System.Console.WriteLine($"---{value}---");
            System.Console.WriteLine("----------------");
        }

        private static char jmfChar(char[] ind, int pos)
        {
            char returnChr = ' ';
            int chars = ind.Length / 2;
            if (pos + chars > ind.Length - 1)
            {
                returnChr = ind[pos + chars - ind.Length];
            }
            else returnChr = ind[pos + chars ];

            return returnChr;
        }

    }
}