/****************************************************************************
**
** 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
**
****************************************************************************/

namespace qx
{
   namespace dao
   {
      namespace detail
      {

         template <class T>
         struct QxDao_Count
         {

            static long count(const qx::QxSqlQuery &query, QSqlDatabase *pDatabase)
            {
               T t;
               Q_UNUSED(t);
               qx::dao::detail::QxDao_Helper<T> dao(t, pDatabase, "count", new qx::QxSqlQueryBuilder_Count<T>(), (&query));
               if (!dao.isValid())
               {
                  return 0;
               }

#ifdef _QX_ENABLE_MONGODB
               if (dao.isMongoDB())
               {
                  long cnt = 0;
                  qx::dao::mongodb::QxMongoDB_Helper::count((&dao), dao.getDataMemberX()->getClass(), cnt, (&query));
                  if (!dao.isValid())
                  {
                     return 0;
                  }
                  return cnt;
               }
#endif // _QX_ENABLE_MONGODB

               QString sql = dao.builder().buildSql().getSqlQuery();
               if (sql.isEmpty())
               {
                  dao.errEmpty();
                  return 0;
               }
               if (!query.isEmpty())
               {
                  dao.addQuery(true);
                  sql = dao.builder().getSqlQuery();
               }
               if (!dao.exec())
               {
                  dao.errFailed();
                  return 0;
               }
               if (!dao.nextRecord())
               {
                  dao.errNoData();
                  return 0;
               }

               return static_cast<long>(dao.query().value(0).toLongLong());
            }

            static QSqlError count(long &lCount, const qx::QxSqlQuery &query, QSqlDatabase *pDatabase)
            {
               T t;
               Q_UNUSED(t);
               lCount = 0;
               qx::dao::detail::QxDao_Helper<T> dao(t, pDatabase, "count", new qx::QxSqlQueryBuilder_Count<T>(), (&query));
               if (!dao.isValid())
               {
                  return dao.error();
               }

#ifdef _QX_ENABLE_MONGODB
               if (dao.isMongoDB())
               {
                  qx::dao::mongodb::QxMongoDB_Helper::count((&dao), dao.getDataMemberX()->getClass(), lCount, (&query));
                  if (!dao.isValid())
                  {
                     return dao.error();
                  }
                  return dao.error();
               }
#endif // _QX_ENABLE_MONGODB

               QString sql = dao.builder().buildSql().getSqlQuery();
               if (sql.isEmpty())
               {
                  return dao.errEmpty();
               }
               if (!query.isEmpty())
               {
                  dao.addQuery(true);
                  sql = dao.builder().getSqlQuery();
               }
               if (!dao.exec())
               {
                  return dao.errFailed();
               }
               if (!dao.nextRecord())
               {
                  return dao.errNoData();
               }
               lCount = static_cast<long>(dao.query().value(0).toLongLong());

               return dao.error();
            }
         };

         template <class T>
         struct QxDao_Count_WithRelation
         {

            static QSqlError count(long &lCount, const QStringList &relation, const qx::QxSqlQuery &query, QSqlDatabase *pDatabase)
            {
               T t;
               Q_UNUSED(t);
               lCount = 0;
               qx::dao::detail::QxDao_Helper<T> dao(t, pDatabase, "count with relation", new qx::QxSqlQueryBuilder_Count_WithRelation<T>(), (&query));
               if (!dao.isValid())
               {
                  return dao.error();
               }
               if (!dao.updateSqlRelationX(relation))
               {
                  return dao.errInvalidRelation();
               }

#ifdef _QX_ENABLE_MONGODB
               if (dao.isMongoDB())
               {
                  qx::dao::mongodb::QxMongoDB_Helper::count((&dao), dao.getDataMemberX()->getClass(), lCount, (&query));
                  if (!dao.isValid())
                  {
                     return dao.error();
                  }
                  return dao.error();
               }
#endif // _QX_ENABLE_MONGODB

               QStringList columns;
               QString sql = dao.builder().buildSql(columns, dao.getSqlRelationLinked()).getSqlQuery();
               if (sql.isEmpty())
               {
                  return dao.errEmpty();
               }
               if (!query.isEmpty())
               {
                  dao.addQuery(true);
                  sql = dao.builder().getSqlQuery();
               }
               if (!dao.exec())
               {
                  return dao.errFailed();
               }
               if (!dao.nextRecord())
               {
                  return dao.errNoData();
               }
               lCount = static_cast<long>(dao.query().value(0).toLongLong());

               return dao.error();
            }
         };

      } // namespace detail
   } // namespace dao
} // namespace qx
