using Microsoft.IdentityModel.Tokens;
using System.Security.Cryptography;

namespace StellaOps.Cryptography.Kms;

public sealed partial class KmsCryptoProvider
{
    private static string ResolveCurveName(ECCurve curve)
    {
        if (!string.IsNullOrWhiteSpace(curve.Oid.FriendlyName))
        {
            return curve.Oid.FriendlyName switch
            {
                "nistP256" => JsonWebKeyECTypes.P256,
                "nistP384" => JsonWebKeyECTypes.P384,
                "nistP521" => JsonWebKeyECTypes.P521,
                _ => JsonWebKeyECTypes.P256
            };
        }

        return JsonWebKeyECTypes.P256;
    }

    private static string ResolveCurveName(int coordinateLength)
        => coordinateLength switch
        {
            32 => JsonWebKeyECTypes.P256,
            48 => JsonWebKeyECTypes.P384,
            66 => JsonWebKeyECTypes.P521,
            _ => JsonWebKeyECTypes.P256
        };

    private static ECCurve ResolveCurve(string curve)
        => curve switch
        {
            JsonWebKeyECTypes.P256 or "P-256" => ECCurve.NamedCurves.nistP256,
            JsonWebKeyECTypes.P384 or "P-384" => ECCurve.NamedCurves.nistP384,
            JsonWebKeyECTypes.P521 or "P-521" => ECCurve.NamedCurves.nistP521,
            _ => ECCurve.NamedCurves.nistP256
        };
}