day 12-p2.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
namespace AdventOfCode_Day12
{
    class Program
    {
        static List<string> StringSetup(string input)
        {
            List<string> CommandList = new List<string>();
            string[] Commands = input.Split('\n');
            for (int i = 0; i < Commands.Length; i++)
            {
                Commands[i] = Commands[i].Replace("\r", String.Empty);
                CommandList.Add(Commands[i]);
            }

            return CommandList;
        }
        static bool CheckInt(string input)
        {
            try
            {
                int x = Int32.Parse(input);
                return true;
            }
            catch
            {
                return false;
            }
        }
        static void Main(string[] args)
        {
            String input = File.ReadAllText("../../input.txt");
            List<string> CommandList = StringSetup(input);
            int a = 0;
            int b = 0;
            int c = 1;
            int d = 0;

            string currentCommand = "";

            for (int i = 0; i < CommandList.Count; i++)
            {
                //Console.Write("\nRunning... Index: " + i);
                currentCommand = CommandList[i];
                string actualCommand = currentCommand.Substring(0, 4);
                currentCommand= currentCommand.Replace(actualCommand,String.Empty);
                string xCommand = "";
                string yCommand = "";
                if (currentCommand.Length > 1)
                {
                    xCommand = currentCommand.Substring(0, currentCommand.IndexOf(" "));
                    currentCommand = currentCommand.Replace(xCommand, String.Empty);
                    yCommand = currentCommand.Substring(0);
                    actualCommand = actualCommand.Trim();
                    xCommand = xCommand.Trim();
                    yCommand = yCommand.Trim();
                }else
                {
                    actualCommand = actualCommand.Trim();
                    xCommand = currentCommand;
                }
                switch(actualCommand)
                {
                    case "cpy":
                        {
                            if(CheckInt(xCommand))
                            {
                                int xValue = Int32.Parse(xCommand);

                                if (yCommand.Contains("a"))
                                    a = xValue;
                                else if (yCommand.Contains("b"))
                                    b = xValue;
                                else if (yCommand.Contains("c"))
                                    c = xValue;
                                else if (yCommand.Contains("d"))
                                    d = xValue;
                            }
                            else
                            {
                                if (xCommand.Contains("a"))
                                {
                                    if (yCommand.Contains("b"))
                                        b = a;
                                    else if (yCommand.Contains("c"))
                                        c = a;
                                    else if (yCommand.Contains("d"))
                                        d = a;
                                }
                                else if (xCommand.Contains("b"))
                                {
                                    if (yCommand.Contains("a"))
                                       a = b;
                                    else if (yCommand.Contains("c"))
                                        c = b;
                                    else if (yCommand.Contains("d"))
                                        d = b;
                                }
                                else if (xCommand.Contains("c"))
                                {
                                    if (yCommand.Contains("a"))
                                        a = c;
                                    else if (yCommand.Contains("b"))
                                        b = c;
                                    else if (yCommand.Contains("d"))
                                        d = c;
                                }
                                else if (xCommand.Contains("d"))
                                {
                                    if (yCommand.Contains("a"))
                                        a = d;
                                    else if (yCommand.Contains("b"))
                                        b = d;
                                    else if (yCommand.Contains("c"))
                                        c = d;
                                }
                            }
                            break;
                        }
                    case "jnz":
                        {
                            int yValue = Int32.Parse(yCommand);
                            if (CheckInt(xCommand))
                            {
                                int xValue = Int32.Parse(xCommand); 
                                if (xValue > 0)
                                {
                                   i += yValue-1; 
                                }

                            }
                            else
                            {
                                if (xCommand.Contains("a"))
                                {
                                    if (a > 0)
                                        i += yValue - 1;
                                }
                                else if (xCommand.Contains("b"))
                                {
                                    if (b > 0)
                                        i += yValue - 1;
                                }
                                else if (xCommand.Contains("c"))
                                {
                                    if (c > 0)
                                        i += yValue - 1;
                                }
                                else if (xCommand.Contains("d"))
                                {
                                    if (d > 0)
                                        i += yValue - 1;
                                }
                            }
                            break;
                        }
                    case "inc":
                        {
                            if (xCommand.Contains("a"))
                                a += 1;
                            else if (xCommand.Contains("b"))
                                b += 1;
                            else if (xCommand.Contains("c"))
                                c += 1;
                            else if (xCommand.Contains("d"))
                                d += 1;
                            break;
                        }
                    case "dec":
                        {
                            if (xCommand.Contains("a"))
                                a -= 1;
                            else if (xCommand.Contains("b"))
                                b -= 1;
                            else if (xCommand.Contains("c"))
                                c -= 1;
                            else if (xCommand.Contains("d"))
                                d -= 1;
                            break;
                        }
                }
                
                //Console.Write("\nA: " + a + "\nB: " + b + "\nC: " + c + "\nD: " + d);
            }
            Console.Write("\n\n\tComplete. The value of 'a' is: " + a);
                Console.Read();
        }
    }
}