using MathNet.Numerics;
using MathNet.Numerics.IntegralTransforms;
using System.Security.Cryptography;

namespace KLHZ.Trader.Core.Tests
{
    public class FFTTests
    {
        [Test]
        public static void Test()
        {
            var da = new List<float>();
            for (int i = 0; i < 100; i++)
            {
                da.Add((float)System.Math.Sin(0.5 * i) + (float)(RandomNumberGenerator.GetInt32(0, 100)) / 300);
            }

            var start = da.ToArray();
            var arrv = da.Select(d => new Complex32(d, 0)).ToArray();
            Fourier.Forward(arrv);

            Fourier.Inverse(arrv);
            var res = arrv.Select(a => a.Real).ToArray();

            for (int i = 0; i < 1000; i++)
            {
                var d = res[i] - start[i];
            }
        }
    }
}