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

namespace ConsoleApplication1
{
    class Program
    {
        static void login()
        {
            string username = "xrx"; //username
            Console.ForegroundColor = ConsoleColor.Yellow;
            Console.WriteLine("Username: ");
            Console.ForegroundColor = ConsoleColor.White;
            string userfield = Console.ReadLine();
            if (userfield == username)
            {
                password();
            }
            else
            {
                Console.ForegroundColor = ConsoleColor.Red;
                Console.WriteLine("Invalid Username!");
                Console.ForegroundColor = ConsoleColor.White;
                login();
            }
        }
        static void logged()
        {
            bool logged = true;
            Console.WriteLine("Welcome to xrx Interface!");
            Console.WriteLine("How i can help you today?");
            Console.WriteLine("Type ''help'' to see whats available");
            while (logged)
            {
                string[] cmds = new string[3] { "help", "logoff", "about" };
                string[] cmdresponse = new string[2] { "y", "n" };
                string cmdline = Console.ReadLine();
                if (cmdline == cmds[0])
                {
                    Console.WriteLine("Available Commands: {0} {1} {2}", cmds);
                }
                else if (cmdline == cmds[1])
                {
                    Console.WriteLine("Are you sure? (y or n)");
                    cmdline = Console.ReadLine();
                    if (cmdline == cmdresponse[0])
                    {
                        login();
                    }
                }
                else if (cmdline == cmds[2])
                {
                    Console.WriteLine("Created by xrx on 21/11/2016");
                }
                else
                {
                    Console.ForegroundColor = ConsoleColor.Red;
                    Console.WriteLine("Command Not Found!");
                    Console.ForegroundColor = ConsoleColor.White;
                }
            }
        }
        static void password()
        {
            string password = "xrx1";
            Console.ForegroundColor = ConsoleColor.Yellow;
            Console.WriteLine("Password: ");
            Console.ForegroundColor = ConsoleColor.Black;
            string pwfield = Console.ReadLine();
            Console.ForegroundColor = ConsoleColor.White;
            if (pwfield == password)
            {
                Console.ForegroundColor = ConsoleColor.Green;
                Console.WriteLine("Access Granted!");
                Console.ForegroundColor = ConsoleColor.White;
                logged();
            }
            else
            {
                Console.ForegroundColor = ConsoleColor.Red;
                Console.WriteLine("Invalid Password!");
                Console.ForegroundColor = ConsoleColor.White;
                login();
            }
        }
        static void Main(string[] args)
        {
            Console.Title = "xrx interface v1.1";
            login();
        }
    }
}