using System;
using System.Security.Cryptography;

namespace WingPaymentService.Common.WeChat
{
    public class RandomGenerator
    {
        readonly RandomNumberGenerator _csp;

        public RandomGenerator()
        {
            _csp =  RandomNumberGenerator.Create();
        }

        public uint GetRandomUInt()
        {
            var randomBytes = GenerateRandomBytes(sizeof(uint));
            return BitConverter.ToUInt32(randomBytes, 0);
        }

        private byte[] GenerateRandomBytes(int bytesNumber)
        {
            byte[] buffer = new byte[bytesNumber];
            _csp.GetBytes(buffer);
            return buffer;
        }
    }
}