/**
  * @RDE_HEADER@
  * The DataManager class is a convenience class for managing structure data
  * $Id$
  * $HeadURL$
  * $Author$
  * Created by Philipp Dassow, SLST, 2017-12-12
  */
#pragma once
#include <memory>
#include <NGLLogger/INGLLogger.h>

#include "reply_message.h"

namespace LtsWebSocket
{
/**
 * @brief The DataManager class is a convenience class for managing structure data from db
 *        T needs to be of namspace::DatabaseInterface
 */
template<typename T>
class DataManagerBaseDl
{
protected: // methods
  /**
   * @brief DataManager Constructor
   * @param dbInterface Interface for requesting db-structs data
   */
  explicit DataManagerBaseDl(const std::shared_ptr<T> &dbInterface, NGL::INGLLogger &logger)
    : m_logger(logger)
    , m_dbInterface(dbInterface)
  {}

  /**
   * @brief toBaseDataMessageFromDb selects the DbType data from the db and converts it to JSON
   * @param uuid of the base DL request
   * @return message send to the requester
   */
  template<typename DbType, typename MessageType>
  ReplyMessage *toBaseDataMessageFromDb(const QString &uuid) const
  {
    QVector<DbType> dataVec;
    // read all data from database
    if (!m_dbInterface->select(dataVec))
    {
      const QString errorMessage = QStringLiteral("Error reading data from database!");
      ERROR_LOG(m_logger) << errorMessage;
      ErrorMessage::ErrorData errData;
      errData.errorMessage = errorMessage;
      errData.uuid = uuid;
      return new ErrorMessage(errData);
    }

    return new MessageType (m_dbInterface->template toJson<DbType>(dataVec), uuid);
  }

protected: // attributes
  NGL::INGLLogger &m_logger;
  std::shared_ptr<T> m_dbInterface;
}; // class DataManagerBaseDl
} // namespace LtsWebSocket