/****************************************************************************
**
** https://www.qxorm.com/
** Copyright (C) 2013 XDL Team (ic-east.com)
**
** This file is part of the QxOrm library
**
** This software is provided 'as-is', without any express or implied
** warranty. In no event will the authors be held liable for any
** damages arising from the use of this software
**
** Commercial Usage
** Licensees holding valid commercial QxOrm licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and XDL Team
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file 'license.gpl3.txt' included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met : http://www.gnu.org/copyleft/gpl.html
**
** If you are unsure which license is appropriate for your use, or
** if you have questions regarding the use of this file, please contact :
** ic-east.com
**
****************************************************************************/

#ifndef _QX_DATE_TIME_NEUTRAL_H_
#define _QX_DATE_TIME_NEUTRAL_H_

#ifdef _MSC_VER
#pragma once
#endif

/*!
 * \file QxDateTimeNeutral.h
 * \author XDL Team
 * \ingroup QxDao
 * \brief Helper class to store a date-time value into database under neutral format (YYYYMMDDHHMMSS) => cross database compatibility
 */

#ifdef _QX_ENABLE_BOOST_SERIALIZATION
#include <boost/serialization/serialization.hpp>
#include <boost/serialization/nvp.hpp>
#endif // _QX_ENABLE_BOOST_SERIALIZATION

#include <QtCore/qdatetime.h>
#include <QtCore/qdatastream.h>

#include <QxSerialize/Qt/QxSerialize_QString.h>

#include <QxTraits/get_class_name.h>

namespace qx
{
   class QxDateTimeNeutral;
} // namespace qx

QX_DLL_EXPORT QDataStream &operator<<(QDataStream &stream, const qx::QxDateTimeNeutral &t) QX_USED;
QX_DLL_EXPORT QDataStream &operator>>(QDataStream &stream, qx::QxDateTimeNeutral &t) QX_USED;

namespace qx
{

   /*!
    * \ingroup QxDao
    * \brief qx::QxDateTimeNeutral : helper class to store a date-time value into database under neutral format (YYYYMMDDHHMMSS) => cross database compatibility
    */
   class QxDateTimeNeutral
   {

#ifdef _QX_ENABLE_BOOST_SERIALIZATION
      friend class boost::serialization::access;
#endif // _QX_ENABLE_BOOST_SERIALIZATION

      friend QX_DLL_EXPORT QDataStream & ::operator<<(QDataStream &stream, const qx::QxDateTimeNeutral &t);
      friend QX_DLL_EXPORT QDataStream & ::operator>>(QDataStream &stream, qx::QxDateTimeNeutral &t);

   private:
      QDateTime m_dt;    //!< Data value under QDateTime format from Qt library
      QString m_neutral; //!< Data value under neutral format 'yyyyMMddhhmmss'

   public:
      QxDateTimeNeutral() { ; }
      explicit QxDateTimeNeutral(const QDateTime &dt) : m_dt(dt) { update(); }
      explicit QxDateTimeNeutral(const QString &neutral) : m_neutral(neutral) { update(); }
      virtual ~QxDateTimeNeutral() { ; }

      inline QDateTime toDateTime() const { return m_dt; }
      inline QString toNeutral() const { return m_neutral; }
      inline bool isValid() const { return m_dt.isValid(); }

      inline void setDateTime(const QDateTime &dt)
      {
         m_neutral = "";
         m_dt = dt;
         update();
      }
      inline void setNeutral(const QString &neutral)
      {
         m_dt = QDateTime();
         m_neutral = neutral;
         update();
      }

      static QxDateTimeNeutral fromDateTime(const QDateTime &dt) { return QxDateTimeNeutral(dt); }
      static QxDateTimeNeutral fromNeutral(const QString &neutral) { return QxDateTimeNeutral(neutral); }

   private:
      static inline const char *format() { return "yyyyMMddhhmmss"; }

      void update()
      {
         if (m_neutral.isEmpty() && !m_dt.isValid())
         {
            return;
         }
         else if (m_dt.isValid())
         {
            m_neutral = m_dt.toString(format());
         }
         else
         {
            qAssert(m_neutral.size() == QString(format()).size());
            m_dt = QDateTime::fromString(m_neutral, format());
            qAssert(m_dt.isValid());
         }
      }

#ifdef _QX_ENABLE_BOOST_SERIALIZATION
      template <class Archive>
      void serialize(Archive &ar, const unsigned int file_version)
      {
         Q_UNUSED(file_version);
         ar &boost::serialization::make_nvp("dt_neutral", m_neutral);
         if (Archive::is_loading::value)
         {
            m_dt = QDateTime();
            update();
         }
      }
#endif // _QX_ENABLE_BOOST_SERIALIZATION
   };

} // namespace qx

QX_REGISTER_CLASS_NAME(qx::QxDateTimeNeutral)

#endif // _QX_DATE_TIME_NEUTRAL_H_
