using System;

public class ByteStream
{
    byte[] bytes = new byte[0];
    public byte[] Bytes => bytes;

    public void Write(byte[] value)
    {
        int offset = bytes.Length;
        Array.Resize(ref bytes, offset + value.Length);
        Array.Copy(value, 0, bytes, offset, value.Length);
    }

    public void Write(IBytesConverter value) => Write(value.GetBytes());

    public byte[] Read(int size)
    {
        byte[] result = new byte[size];
        Array.Copy(bytes, 0, result, 0, size);

        byte[] subBytes = new byte[bytes.Length - size];
        Array.Copy(bytes, size, subBytes, 0, subBytes.Length);
        bytes = subBytes;

        return result;
    }

    public void Read(IBytesConverter byteElement) => byteElement.SetBytes(Read(byteElement.GetSize()));

    public void Read(params IBytesConverter[] byteElements)
    {
        int offset = 0;

        for(int i = 0; i < byteElements.Length; ++i)
        {
            byteElements[i].SetBytes(bytes, offset);
            offset += byteElements[i].GetSize();
        }

        byte[] subBytes = new byte[bytes.Length - offset];
        Array.Copy(bytes, offset, subBytes, 0, subBytes.Length);
        bytes = subBytes;
    }
}