/*
 * @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 "SchemaVersion.hpp"
#include "common/exception/Exception.hpp"

namespace cta::catalogue {

SchemaVersion::SchemaVersion() :
  m_schemaVersionMajor(0), m_schemaVersionMinor(0), m_status(UPGRADING) {}

template<>
std::string SchemaVersion::getSchemaVersion() const {
  return std::to_string(m_schemaVersionMajor)+"."+std::to_string(m_schemaVersionMinor);
}

template<>
SchemaVersion::MajorMinor SchemaVersion::getSchemaVersion() const {
  return std::make_pair(m_schemaVersionMajor,m_schemaVersionMinor);
}

template<>
std::string SchemaVersion::getSchemaVersionNext() const {
  std::string schemaVersionNext;
  if(m_nextSchemaVersionMajor && m_nextSchemaVersionMinor){
    schemaVersionNext = std::to_string(m_nextSchemaVersionMajor.value())+"."+std::to_string(m_nextSchemaVersionMinor.value());
  }
  return schemaVersionNext;
}

template<>
SchemaVersion::MajorMinor SchemaVersion::getSchemaVersionNext() const {
  return std::make_pair(m_nextSchemaVersionMajor.value(),m_nextSchemaVersionMinor.value());
}

template<>
std::string SchemaVersion::getStatus() const {
  switch(m_status){
    case PRODUCTION:
      return "PRODUCTION";
    case UPGRADING:
      return "UPGRADING";
    default:
      throw cta::exception::Exception("In SchemaVersion::getStatus(), wrong status");
  }
}

template<>
SchemaVersion::Status SchemaVersion::getStatus() const {
  return m_status;
}

SchemaVersion::Builder& SchemaVersion::Builder::schemaVersionMajor(const uint64_t pSchemaVersionMajor){
  m_schemaVersion.m_schemaVersionMajor = pSchemaVersionMajor;
  m_schemaVersionMajorSet = true;
  return *this;
}

SchemaVersion::Builder& SchemaVersion::Builder::schemaVersionMinor(const uint64_t pSchemaVersionMinor){
  m_schemaVersion.m_schemaVersionMinor = pSchemaVersionMinor;
  m_schemaVersionMinorSet = true;
  return *this;
}

SchemaVersion::Builder& SchemaVersion::Builder::nextSchemaVersionMajor(const uint64_t pSchemaVersionMajorNext){
  m_schemaVersion.m_nextSchemaVersionMajor = pSchemaVersionMajorNext;
  return *this;
}

SchemaVersion::Builder& SchemaVersion::Builder::nextSchemaVersionMinor(const uint64_t pSchemaVersionMinorNext){
  m_schemaVersion.m_nextSchemaVersionMinor = pSchemaVersionMinorNext;
  return *this;
}

SchemaVersion::Builder& SchemaVersion::Builder::status(const std::string& pstatus){
  try {
    m_schemaVersion.m_status = s_mapStringStatus.at(pstatus);
    return *this;
  } catch(const std::out_of_range& ){
    throw cta::exception::Exception("In SchemaVersion::Builder::status(), wrong status given as parameter: "+pstatus);
  }
}

SchemaVersion::Builder& SchemaVersion::Builder::status(const SchemaVersion::Status & pstatus){
    m_schemaVersion.m_status = pstatus;
    return *this;
}

std::map<std::string,SchemaVersion::Status> SchemaVersion::Builder::s_mapStringStatus {
  {"PRODUCTION",Status::PRODUCTION},
  {"UPGRADING",Status::UPGRADING}
};

void SchemaVersion::Builder::validate() const {
  if(!m_schemaVersionMajorSet || !m_schemaVersionMinorSet){
    throw cta::exception::Exception("In SchemaVersion::Builder::validate(), schemaVersionMajor or schemaVersionMinor have not been set.");
  }
  if(m_schemaVersion.m_nextSchemaVersionMajor && m_schemaVersion.m_nextSchemaVersionMinor && m_schemaVersion.m_status == SchemaVersion::Status::PRODUCTION){
    throw cta::exception::Exception("In SchemaVersion::Builder::validate(), status is "+m_schemaVersion.getStatus<std::string>()+" but nextSchemaVersionMajor and nextSchemaVersionMinor are defined");
  }
  if(!m_schemaVersion.m_nextSchemaVersionMajor && !m_schemaVersion.m_nextSchemaVersionMinor && m_schemaVersion.m_status == SchemaVersion::Status::UPGRADING){
    throw cta::exception::Exception("In SchemaVersion::Builder::validate(), status is "+m_schemaVersion.getStatus<std::string>()+" but nextSchemaVersionMajor and nextSchemaVersionMinor are NOT defined.");
  }
}

SchemaVersion SchemaVersion::Builder::build() const {
  validate();
  return m_schemaVersion;
}

} // namespace cta::catalogue