/*
 * @project      The CERN Tape Archive (CTA)
 * @copyright    Copyright © 2021-2022 CERN
 * @license      This program is free software, distributed under the terms of the GNU General Public
 *               Licence version 3 (GPL Version 3), copied verbatim in the file "COPYING". You can
 *               redistribute it and/or modify it under the terms of the GPL Version 3, or (at your
 *               option) any later version.
 *
 *               This program is distributed in the hope that it will be useful, but WITHOUT ANY
 *               WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 *               PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 *               In applying this licence, CERN does not waive the privileges and immunities
 *               granted to it by virtue of its status as an Intergovernmental Organization or
 *               submit itself to any jurisdiction.
 */

#include "common/exception/UserError.hpp"
#include "common/exception/Exception.hpp"
#include "frontend/common/GrpcEndpoint.hpp"

std::string cta::grpc::Endpoint::getPath(const std::string &diskFileId) const {
  // diskFileId is sent to CTA as a uint64_t, but we store it as a decimal string, cf.:
  //   XrdSsiCtaRequestMessage.cpp: request.diskFileID = std::to_string(notification.file().fid());
  // Here we convert it back to make the namespace query:
  uint64_t id = strtoull(diskFileId.c_str(), nullptr, 0);
  if(id == 0) return ("Invalid disk ID");
  auto response = m_grpcClient->GetMD(eos::rpc::FILE, id, "");

  return response.fmd().name().empty() ? "Bad response from nameserver" : response.fmd().path();
}

std::string cta::grpc::Endpoint::getPathExceptionThrowing(const std::string &diskFileId) const {
  // diskFileId is sent to CTA as a uint64_t, but we store it as a decimal string, cf.:
  //   XrdSsiCtaRequestMessage.cpp: request.diskFileID = std::to_string(notification.file().fid());
  // Here we convert it back to make the namespace query:
  uint64_t id = strtoull(diskFileId.c_str(), nullptr, 0);
  if(id == 0) throw cta::exception::UserError("Invalid disk ID");
  auto response = m_grpcClient->GetMD(eos::rpc::FILE, id, "");

  if (response.fmd().name().empty()) {
    throw cta::exception::Exception("Bad response from nameserver");
  } else {
    return response.fmd().path();
  }
}