using System;
using System.Threading;
using System.Threading.Tasks;
using static StellaOps.Localization.T;

namespace StellaOps.Cryptography.Kms;

public sealed partial class GcpKmsClient
{
    private async Task<string> ResolveVersionAsync(string keyId, string? keyVersion, CancellationToken cancellationToken)
    {
        if (!string.IsNullOrWhiteSpace(keyVersion))
        {
            return keyVersion!;
        }

        var snapshot = await GetCachedMetadataAsync(keyId, cancellationToken).ConfigureAwait(false);
        if (!string.IsNullOrWhiteSpace(snapshot.Metadata.PrimaryVersionName))
        {
            return snapshot.Metadata.PrimaryVersionName!;
        }

        var firstActive = snapshot.Versions.FirstOrDefault(v => v.State == GcpCryptoKeyVersionState.Enabled);
        if (firstActive is not null)
        {
            return firstActive.VersionName;
        }

        throw new InvalidOperationException(_t("crypto.kms.no_primary_version", keyId));
    }
}