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

namespace ConsoleApplication1
{
    class Program
    {
        static void loadingno()
        {
            int i;
            for (i = 1; i <= 1000000; i++)
            {
                Console.Write("");
            }
            Console.Write("");
            for (i = 1; i <= 10000000; i++)
            {
                Console.Write("");
            }
            Console.Write("");
            for (i = 1; i <= 1000000; i++)
            {
                Console.Write("");
            }
            Console.Write("");
            for (i = 1; i <= 10000000; i++)
            {
                Console.Write("");
            }
            Console.Write("");
            for (i = 1; i <= 1000000; i++)
            {
                Console.Write("");
            }
            Console.Write("");
        }
        static void loading()
        {
            int i;
            Console.Write("Loading");
            for (i = 1; i <= 1000000; i++)
            {
                Console.Write("");
            }
            Console.Write(".");
            for (i = 1; i <= 10000000; i++)
            {
                Console.Write("");
            }
            Console.Write(".");
            for (i = 1; i <= 1000000; i++)
            {
                Console.Write("");
            }
            Console.Write(".");
            for (i = 1; i <= 10000000; i++)
            {
                Console.Write("");
            }
            Console.Write(".");
            for (i = 1; i <= 1000000; i++)
            {
                Console.Write("");
            }
            Console.Write(".");
        }
        static void register(string[] user, string[] pass)
        {
            int i=0;
            int z=0;
            int test=0;
            string namecheck;
            int namecheckint=0;
            for(test=0;test<user.Length;test++)
            {
                if (i == 0)
                {
                    Console.Write("Enter Username: ");
                    user[i] = Console.ReadLine();
                    Console.Write("Enter Password: ");
                    pass[i] = Console.ReadLine();
                    Console.WriteLine("");
                }
                else
                {
                    Console.Write("Enter Username: ");
                    namecheck = Console.ReadLine();
                    for (z = 0; z <= i; z++)
                    {
                        if (namecheck == user[z])
                        {
                            namecheckint++;
                        }

                    }
                    while (namecheckint != 0)
                    {
                        namecheckint = 0;
                        Console.WriteLine("**** Username is Not Available, Try Again ****");
                        Console.Write("Enter Username: ");
                        namecheck = Console.ReadLine();
                        for (z = 0; z <= i; z++)
                        {
                            if (namecheck == user[z])
                            {
                                namecheckint++;
                            }

                        }
                    }
                    user[i] = namecheck;
                    Console.Write("Enter Password: ");
                    pass[i] = Console.ReadLine();
                    Console.WriteLine("");
                }
                i++;
            }
        }
        static void login(string[] user, string[] pass)
        {
            string name;
            string pro;
            int i;
            int z=-2;
            Console.Write("Enter Username: ");
            name = Console.ReadLine();
            Console.Write("Enter Password: ");
            pro = Console.ReadLine();
            for (i = 0; i < user.Length; i++)
            {
                if (name == user[i])
                    z = i;
            }
            if (z == -2)
            {
                Console.WriteLine("Unknown Username try again");
            }
            while (z == -2)
            {
                Console.Write("Enter Username: ");
                name = Console.ReadLine();
                Console.Write("Enter Password: ");
                pro = Console.ReadLine();
                for (i = 0; i < user.Length; i++)
                {
                    if (name == user[i])
                        z = i;
                }
            }
            if (z >= 0)
            {
                if (pro == pass[z])
                {
                    Console.WriteLine("Connected Succsuffly");
                    Console.WriteLine("*********************");
                    Console.WriteLine("Welcome {0}", user[z]);
                }
            }
        }
        static void Main(string[] args)
        {
            ConsoleKeyInfo keypress;
            string[] user = new string[30];
            string[] pass = new string[30];
            Console.WriteLine("Dear User.. You Must Enter Value's in the Array --=> You Will Moved Automatic");
            loadingno();
            loading();
            Console.Clear();
            Console.WriteLine("Register Page");
            Console.WriteLine("*************");
            register(user, pass);
            Console.Clear();
            Console.WriteLine("To Do Login Please Enter --=> L <=--");
            keypress = Console.ReadKey();
            Console.Clear();
            if (keypress.KeyChar == 'l')
            {
                Console.WriteLine("Login Page");
                Console.WriteLine("*************");
                login(user, pass);
            }
            if (keypress.KeyChar == 'L')
            {
                Console.WriteLine("Login Page");
                Console.WriteLine("*************");
                login(user, pass);
            }
        }
    }
}