/*
 * Zack
 * ICE 11
 */
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ice11
{
    class Program
    {
        static void Main(string[] args)
        {
            // title
            Console.Title = " ICE 11";

            // Variables
            int shifts;     // Shift how many indexes
            string[] elements;  // inpuit array
            bool isValid;   // valiation
            bool restart = true;   // if user wants to restart

            //If the user wants to restart
            do
            {

                Console.Clear();

                Console.WriteLine(@"
===============
= Array =
===============
");
                // Ask for # o elements
                Console.Write(" enter # of elements divided by commas: ");

                // Split input into an array of string
                Console.ForegroundColor = ConsoleColor.Cyan;
                elements =  Console.ReadLine().Split(',');
                Console.ForegroundColor = ConsoleColor.Gray;

                // Whole number validation do-while
                do
                {
                    Console.Write("Enter shifts: ");
                    Console.ForegroundColor = ConsoleColor.Cyan;
                    isValid = int.TryParse(Console.ReadLine(), out shifts);
                    Console.ForegroundColor = ConsoleColor.Gray;

                    // Tryparse is false if input is not whole number
                    if(!isValid)
                    {
                        Console.ForegroundColor = ConsoleColor.Red;
                        Console.WriteLine("Error shift must be a whole number...");
                        Console.ForegroundColor = ConsoleColor.Gray;

                    }

                } while (!isValid);

                // Convert negative shifts into positive
                // Add the element.Length to the # o shifts
                if (shifts < 0) shifts += elements.Length;

                //avoid rotating more than nessecary
                // ex shifts = 12 and I / by length 5 = remainder 2 shifts left

                shifts %= elements.Length;

                // loop as many times as given shifts
                for(int countShifts = 0; countShifts < shifts; countShifts++)
                {
                    string dummy = elements[0]; // copy first element

                    // SHift array
                    for (int countElements = 0; countElements < elements.Length - 1; countElements++)
                    {
                        elements[countElements] = elements[countElements + 1];
                    }


                    // Copy first element to last index
                    elements[elements.Length - 1] = dummy;
                }

                // Print out shifted array
                Console.Write("\nShifted Array");
                Console.ForegroundColor = ConsoleColor.Cyan;
                foreach (string element in elements)
                {
                    Console.Write(element + " ");
                }

                Console.ForegroundColor = ConsoleColor.Gray;
                // ask for restart or exit
                Console.Write("\n\nPress [y] to restart [any] to exit...");
                restart = Console.ReadKey().KeyChar == 'y';

            } while (restart);

            // exit app

        }
    }
}