using System;
using System.IO;

public class Challenge
{
    string localdb;
    string username;
    int    privilege = 0;

    static public void Main()
    {
        Console.WriteLine("Challenge (TM) Console");
        Console.WriteLine("======================");

        Challenge chl = new Challenge();
        if (chl.privilege == 0)
        {
            chl.privilege = chl.do_login();
            if (chl.privilege == 0)
            {
                Console.WriteLine("Tidak dapat mengenali Anda. Apakah Anda terdaftar?");
                return;
            }
        }

        if (chl.privilege != 0)
        {
            Console.Write("Selamat datang, " + chl.username);
            switch (chl.privilege)
            {
                case 1: Console.WriteLine(" (User)"); break;
                case 2: Console.WriteLine(" (Admin)");
                break;
            }
        }
    }

    public Challenge()
    {
        localdb = "credentials.db";
    }

    int do_login()
    {
        string user;
        string password;
        string pass;
        int    priv;
        bool   found = false;

        if (privilege != 0)
        {
            return privilege;
        }

        privilege = 0;

        Console.WriteLine("Please Login\n\n");
        Console.Write("Username: ");
        username = Console.ReadLine();

        Console.Write("Password: ");
        password = Console.ReadLine();

        //#1 Check if there is local cache
        if (!found)
        {
            string line;
            try
            {
                using (TextReader reader = File.OpenText(localdb))
                {
                    while ((line = reader.ReadLine()) != null)
                    {
                        string[] words = line.Split('|');

                        if (words.Length >= 3)
                        {
                            // Username
                            user = words[0];

                            // password
                            pass = words[1];

                            // privilege
                            priv = int.Parse(words[2]);

                            if (username == user && password == pass)
                            {
                                found = true;
                                privilege = priv;
                                break;
                            }
                        }
                    }
                }
            } catch
            {
                found = false;
                privilege = 0;
            }
        }

        return privilege;
    }
}