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

namespace Lotto_Exercise
{
    class LottoKupon
    {
        private int Rows { get; set; }
        private int[][] Coupon { get; set; }
        public LottoKupon(int rows)
        {
            this.Rows = rows;
            this.Coupon = new int[rows][];
        }

        public int[][] GenerateCoupon()
        {
            for (int i = 0; i < Rows; i++)
            {
                Coupon[i] = GenerateUniqueNumbers();
            }

            return Coupon;
        }

        private int[] GenerateUniqueNumbers()
        {
            int[] numbers = new int[7];

            for (int i = 0; i < numbers.Length; i++)
            {
                int nextNumber = RandomNumber();

                while (Array.IndexOf(numbers, nextNumber) != -1)
                {
                    nextNumber = RandomNumber();
                }

                numbers[i] = nextNumber;
            }

            Array.Sort(numbers);

            return numbers;
        }

        private int RandomNumber()
        {
            return new Random().Next(1, 37);
        }

    }
}