namespace Benchmarks;

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

[SimpleJob(RuntimeMoniker.Net80)]
[SimpleJob(RuntimeMoniker.Net70)]
[SimpleJob(RuntimeMoniker.Net60)]
[Orderer(SummaryOrderPolicy.FastestToSlowest)]
[RankColumn]
[MemoryDiagnoser]
[ThreadingDiagnoser]
public class BinaryConversionBenchmarks
{
    private byte[] data;
    private int offset;

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

    [Benchmark]
    public short BitConverterTest() => BitConverter.ToInt16(this.data, this.offset);

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

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