#region Usings
using System;
using System.Security.Cryptography;
#endregion

namespace Novetus.Core
{
    #region CryptoRandom

    public class CryptoRandom : RandomNumberGenerator
    {
        private static RandomNumberGenerator r;

        public CryptoRandom()
        {
            r = Create();
        }

        ///<param name=”buffer”>An array of bytes to contain random numbers.</param>
        public override void GetBytes(byte[] buffer)
        {
            r.GetBytes(buffer);
        }

        public override void GetNonZeroBytes(byte[] data)
        {
            r.GetNonZeroBytes(data);
        }
        public double NextDouble()
        {
            byte[] b = new byte[4];
            r.GetBytes(b);
            return (double)BitConverter.ToUInt32(b, 0) / UInt32.MaxValue;
        }

        ///<param name=”minValue”>The inclusive lower bound of the random number returned.</param>
        ///<param name=”maxValue”>The exclusive upper bound of the random number returned. maxValue must be greater than or equal to minValue.</param>
        public int Next(int minValue, int maxValue)
        {
            return (int)Math.Round(NextDouble() * (maxValue - minValue - 1)) + minValue;
        }
        public int Next()
        {
            return Next(0, int.MaxValue);
        }

        ///<param name=”maxValue”>The inclusive upper bound of the random number returned. maxValue must be greater than or equal 0</param>
        public int Next(int maxValue)
        {
            return Next(0, maxValue);
        }
    }
    #endregion
}