using System;
using System.Threading;

namespace task2
{
    class Program
    {
        public static void WritingDigits()   // A function for writing digits from N to K
        {
            Console.Clear();
            Console.WriteLine("Enter please the range(N..K): ");
            Console.Write("N: ");
            byte n = Convert.ToByte(Console.ReadLine());
            Console.Write("K: ");
            byte k = Convert.ToByte(Console.ReadLine());
            Console.WriteLine();
            Thread.Sleep(1000);

            while (n <= k)
            {
                if (n < k)
                    Console.Write(n + ", ");
                else
                    Console.Write(n + ";");
                n++;
            }
            Console.WriteLine();
            Console.WriteLine("Press ENTER to continue...");
            Console.ReadKey();
            Console.Clear();
        }

        public static void Fibonacci()  // A function for writing the first 11 numbers of Fibonacci sequence
        {
            Console.Clear();
            byte[] numbers = new byte[13];
            Console.Write("The first 11 numbers of Fibonacci sequence: ");
            for(byte i=0; i < 12; i++)
            {
                Thread.Sleep(750);
                if (i == 0)
                    numbers[i] = Convert.ToByte(i + 0);
                else if (i == 1)
                    numbers[i] = Convert.ToByte(i + 0);
                else
                    numbers[i] = Convert.ToByte(numbers[i - 2] + numbers[i-1]);

                if (i < 11)
                    Console.Write(numbers[i] + ", ");
                else
                    Console.Write(numbers[i] + ". ");
            }
            Console.WriteLine();
            Thread.Sleep(2000);
            Console.Write("Press ENTER to continue...");
            Console.ReadKey();
            Console.Clear();
        }

        public static void Puzzle()  // A function for a puzzle
        {
            Console.WriteLine();
            Console.WriteLine("Так, у меня для тебя загадка:");
            Console.WriteLine("    Что это ? Синий, большой, с усами и полностью набит зайцами...");

            byte HpRemain = 3;
            string guess = "";

            while(HpRemain > 0 )
            {
                Console.Write("(Твоё ХП:"+ HpRemain + ") Пиши свои догадки: ");
                guess = Console.ReadLine();

                if (guess == "Троллейбус" || guess == "Тролейбус" || guess == "тролейбус" || guess == "троллейбус")
                {
                    Console.Clear();
                    Console.WriteLine("Правильно!");
                    Thread.Sleep(2000);
                    break;
                }else if(guess == "сдаюсь" || guess == "Сдаюсь")
                {
                    Console.Clear();
                    Console.WriteLine("Жаль, но правильным ответом был \"Троллейбус\"");
                    Thread.Sleep(3000);
                    break;
                }else
                {
                    Console.WriteLine();
                    if (HpRemain > 1)
                    {
                        Console.WriteLine("А подумай еще...");
                        Thread.Sleep(1500);
                    }

                    else
                    {
                        Console.Clear();
                        Console.WriteLine("К сожалению, ты проиграл. Твои ХП закончились...");
                        Thread.Sleep(2000);
                    }
                    Console.WriteLine();

                    HpRemain--;
                }
            }
            Console.Clear();
        }

        public static int Recursion(int number)
        {
            if (number % 10 > 0)
            {
                return ((number % 10) + (Recursion(number / 10)));
            }
            else
            {
                return 0;
            }
        }

        public static void NameWrite()
        {
            Console.Clear();
            Console.WriteLine("Tell me your name please(eng): ");
            string name = Console.ReadLine();
            Console.Clear();
            Thread.Sleep(750);
            Console.Write(name);
            Console.SetCursorPosition(Console.WindowWidth - name.Length, 0);
            Thread.Sleep(750);
            Console.Write(name);
            Console.SetCursorPosition(0, Console.WindowHeight);
            Thread.Sleep(750);
            Console.Write(name);
            Console.SetCursorPosition(Console.WindowWidth - name.Length, Console.WindowHeight);
            Thread.Sleep(750);
            Console.Write(name);
            Thread.Sleep(750);
            Console.SetCursorPosition((Console.WindowWidth / 2)-13, Console.WindowHeight / 2);
            Console.Write("Press ENTER to continue...");


            Console.ReadKey();
            Console.Clear();
        }

        static void Main(string[] args)
        {
            while(true)
            {
                Console.WriteLine("First of all, choose your action: ");
                Console.WriteLine("1 - Writing digits from N to K;");
                Console.WriteLine("2 - Writing name in corners;");
                Console.WriteLine("3 - Writing first 11 numbers of Fibonacci sequence;");
                Console.WriteLine("4 - Just a little puzzle for you :)");
                Console.WriteLine("5 - To get a sum of digits out of number;");
                Console.WriteLine();
                Console.WriteLine("0 - To quit the application;");
                Console.Write("Your action: ");
                byte act =  Convert.ToByte(Console.ReadLine());
                int number = 0;

                switch (act)
                {
                    case 1:
                        WritingDigits();
                        break;
                    case 2:
                        NameWrite();
                        break;
                    case 3:
                        Fibonacci();
                        break;
                    case 4:
                        Puzzle();
                        break;
                    case 5:
                        Console.Clear();
                        Console.Write("Enter please a number for getting a result: ");
                        number = Convert.ToInt32(Console.ReadLine());
                        Console.Clear();
                        Console.WriteLine("So, the result is: " + Recursion(number));
                        Thread.Sleep(3000);
                        Console.Clear();
                        break;
                    case 0:
                        Environment.Exit(0);
                        break;
                    default:
                        Console.Clear();
                        break;
                }
            }
        }
    }
}