using System.Security.Cryptography;
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Jobs;
using BenchmarkDotNet.Order;

namespace Benchmarks;

[SimpleJob(RuntimeMoniker.NativeAot70)]
[SimpleJob(RuntimeMoniker.Net70)]
[SimpleJob(RuntimeMoniker.Net60)]
[Orderer(SummaryOrderPolicy.FastestToSlowest)]
[RankColumn]
[MemoryDiagnoser]
[ExceptionDiagnoser]
[ThreadingDiagnoser]
public class BinaryConversionBenchmarks
{
    private byte[] data;
    private int offset;

    [GlobalSetup]
    public void Setup()
    {
        data = RandomNumberGenerator.GetBytes(4000);
        offset = RandomNumberGenerator.GetInt32(0, 3500);
    }

    [Benchmark]
    public Int16 BitConverterTest()
    {
        return BitConverter.ToInt16(data, offset);
    }

    [Benchmark]
    public Int16 BinaryReader()
    {
        using MemoryStream ms = new MemoryStream(data);
        using BinaryReader reader = new BinaryReader(ms);
        reader.BaseStream.Position = offset;
        return reader.ReadInt16();
    }

    [Benchmark]
    public Int16 BinaryPrimitives()
    {
        return System.Buffers.Binary.BinaryPrimitives.ReadInt16LittleEndian(
            new ArraySegment<byte>(data, offset, sizeof(short)));
    }
}