using Google.Apis.Auth.OAuth2;
using Google.Apis.Util.Store;
using System.IO;
using System.Threading;
using System.Threading.Tasks;

public static class GmailTokenManager
{
    public static async Task<string> ObtenerAccessTokenAsync(GmailConfig config)
    {
        //var stream = new FileStream(config.ClientSecretPath, FileMode.Open, FileAccess.Read);
        var stream = new MemoryStream(config.ClientSecret);

        //var credencial = await GoogleWebAuthorizationBroker.AuthorizeAsync(
        //    GoogleClientSecrets.FromStream(stream).Secrets,
        //    new[] { "https://www.googleapis.com/auth/gmail.send" },
        //    config.Usuario,
        //    CancellationToken.None,
        //    new FileDataStore(config.TokenFolder, true)
        //);
        var credencial = await GoogleWebAuthorizationBroker.AuthorizeAsync(
          GoogleClientSecrets.FromStream(stream).Secrets,
          new[] { "https://mail.google.com/" },
          config.Usuario,
          CancellationToken.None,
          new FileDataStore(config.TokenFolder, true)
      );

        return await credencial.GetAccessTokenForRequestAsync();
    }
}