using System;

using Google.Protobuf;

namespace FrostFS.SDK.Client.Mappers.GRPC;

public static class SignatureMapper
{
    public static Refs.Signature ToMessage(this FrostFsSignature signature)
    {
        if (signature is null)
        {
            throw new ArgumentNullException(nameof(signature));
        }

        var scheme = signature.Scheme switch
        {
            SignatureScheme.EcdsaRfc6979Sha256 => Refs.SignatureScheme.EcdsaRfc6979Sha256,
            SignatureScheme.EcdsaRfc6979Sha256WalletConnect => Refs.SignatureScheme.EcdsaRfc6979Sha256WalletConnect,
            SignatureScheme.EcdsaSha512 => Refs.SignatureScheme.EcdsaSha512,
            _ => throw new ArgumentException(nameof(signature.Scheme), $"Unexpected enum value: {signature.Scheme}")
        };

        return new Refs.Signature
        {
            Key = ByteString.CopyFrom(signature.Key),
            Scheme = scheme,
            Sign = ByteString.CopyFrom(signature.Sign)
        };
    }
}