/****************************************************************************
**
** 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_Exist_Generic
         {

            static qx_bool exist(T &t, QSqlDatabase *pDatabase)
            {
               qx::dao::detail::QxDao_Helper<T> dao(t, pDatabase, "exist", new qx::QxSqlQueryBuilder_Exist<T>());
               if (!dao.isValid())
               {
                  return qx_bool(false);
               }

#ifdef _QX_ENABLE_MONGODB
               if (dao.isMongoDB())
               {
                  long cnt = 0;
                  QString json = qx::serialization::json::to_string(t, 1, "mongodb:only_id");
                  qx_query query(json);
                  qx::dao::mongodb::QxMongoDB_Helper::count((&dao), dao.getDataMemberX()->getClass(), cnt, (&query));
                  if (!dao.isValid())
                  {
                     return qx_bool(false);
                  }
                  return qx_bool(cnt >= 1);
               }
#endif // _QX_ENABLE_MONGODB

               QString sql = dao.builder().buildSql().getSqlQuery();
               if (!dao.getDataId() || sql.isEmpty())
               {
                  dao.errEmpty();
                  return qx_bool(false);
               }
               if (!dao.prepare(sql))
               {
                  dao.errFailed(true);
                  return qx_bool(false);
               }

               {
                  qx::dao::detail::IxDao_Timer timer((&dao), qx::dao::detail::IxDao_Helper::timer_cpp_read_instance);
                  qx::dao::detail::QxSqlQueryHelper_Exist<T>::resolveInput(t, dao.query(), dao.builder());
               }

               if (!dao.exec(true))
               {
                  dao.errFailed();
                  return qx_bool(false);
               }
               return qx_bool(dao.nextRecord());
            }
         };

         template <class T>
         struct QxDao_Exist_Container
         {

            static qx_bool exist(T &t, QSqlDatabase *pDatabase)
            {
               typedef typename qx::trait::generic_container<T>::type_value_qx type_item;

               if (qx::trait::generic_container<T>::size(t) <= 0)
               {
                  return qx_bool(false);
               }
               qx::dao::detail::QxDao_Helper_Container<T> dao(t, pDatabase, "exist", new qx::QxSqlQueryBuilder_Exist<type_item>());
               if (!dao.isValid())
               {
                  return qx_bool(false);
               }

#ifdef _QX_ENABLE_MONGODB
               if (dao.isMongoDB())
               {
                  for (typename T::iterator it = t.begin(); it != t.end(); ++it)
                  {
                     if (!existItem((*it), dao))
                     {
                        return qx_bool(false);
                     }
                  }
                  return qx_bool(true);
               }
#endif // _QX_ENABLE_MONGODB

               QString sql = dao.builder().buildSql().getSqlQuery();
               if (sql.isEmpty())
               {
                  dao.errEmpty();
                  return qx_bool(false);
               }
               if (!dao.prepare(sql))
               {
                  dao.errFailed(true);
                  return qx_bool(false);
               }

               for (typename T::iterator it = t.begin(); it != t.end(); ++it)
               {
                  if (!existItem((*it), dao))
                  {
                     return qx_bool(false);
                  }
               }

               return qx_bool(true);
            }

         private:
            template <typename U>
            static inline bool existItem(U &item, qx::dao::detail::QxDao_Helper_Container<T> &dao)
            {
               return existItem_Helper < U, std::is_pointer<U>::value || qx::trait::is_smart_ptr<U>::value > ::exist(item, dao);
            }

            template <typename U, bool bIsPointer /* = true */>
            struct existItem_Helper
            {
               static inline bool exist(U &item, qx::dao::detail::QxDao_Helper_Container<T> &dao)
               {
                  return (item ? qx::dao::detail::QxDao_Exist_Container<T>::existItem((*item), dao) : false);
               }
            };

            template <typename U1, typename U2>
            struct existItem_Helper<std::pair<U1, U2>, false>
            {
               static inline bool exist(std::pair<U1, U2> &item, qx::dao::detail::QxDao_Helper_Container<T> &dao)
               {
                  return qx::dao::detail::QxDao_Exist_Container<T>::existItem(item.second, dao);
               }
            };

            template <typename U1, typename U2>
            struct existItem_Helper<const std::pair<U1, U2>, false>
            {
               static inline bool exist(const std::pair<U1, U2> &item, qx::dao::detail::QxDao_Helper_Container<T> &dao)
               {
                  return qx::dao::detail::QxDao_Exist_Container<T>::existItem(item.second, dao);
               }
            };

#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
            template <typename U1, typename U2>
            struct existItem_Helper<QPair<U1, U2>, false>
            {
               static inline bool exist(QPair<U1, U2> &item, qx::dao::detail::QxDao_Helper_Container<T> &dao)
               {
                  return qx::dao::detail::QxDao_Exist_Container<T>::existItem(item.second, dao);
               }
            };

            template <typename U1, typename U2>
            struct existItem_Helper<const QPair<U1, U2>, false>
            {
               static inline bool exist(const QPair<U1, U2> &item, qx::dao::detail::QxDao_Helper_Container<T> &dao)
               {
                  return qx::dao::detail::QxDao_Exist_Container<T>::existItem(item.second, dao);
               }
            };
#endif // (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))

            template <typename U>
            struct existItem_Helper<U, false>
            {
               static bool exist(U &item, qx::dao::detail::QxDao_Helper_Container<T> &dao)
               {
#ifdef _QX_ENABLE_MONGODB
                  if (dao.isMongoDB())
                  {
                     long cnt = 0;
                     QString json = qx::serialization::json::to_string(item, 1, "mongodb:only_id");
                     qx_query query(json);
                     qx::dao::mongodb::QxMongoDB_Helper::count((&dao), dao.getDataMemberX()->getClass(), cnt, (&query));
                     if (!dao.isValid())
                     {
                        return false;
                     }
                     return (cnt >= 1);
                  }
#endif // _QX_ENABLE_MONGODB

                  {
                     qx::dao::detail::IxDao_Timer timer((&dao), qx::dao::detail::IxDao_Helper::timer_cpp_read_instance);
                     qx::dao::detail::QxSqlQueryHelper_Exist<U>::resolveInput(item, dao.query(), dao.builder());
                  }

                  if (!dao.exec(true))
                  {
                     dao.errFailed();
                     return false;
                  }
                  return dao.nextRecord();
               }
            };
         };

         template <class T>
         struct QxDao_Exist_Ptr
         {

            static inline qx_bool exist(T &t, QSqlDatabase *pDatabase)
            {
               return (t ? qx::dao::exist((*t), pDatabase) : qx_bool(false));
            }
         };

         template <class T>
         struct QxDao_Exist
         {

            static inline qx_bool exist(T &t, QSqlDatabase *pDatabase)
            {
               typedef typename std::conditional<std::is_pointer<T>::value, qx::dao::detail::QxDao_Exist_Ptr<T>, qx::dao::detail::QxDao_Exist_Generic<T>>::type type_dao_1;
               typedef typename std::conditional<qx::trait::is_smart_ptr<T>::value, qx::dao::detail::QxDao_Exist_Ptr<T>, type_dao_1>::type type_dao_2;
               typedef typename std::conditional<qx::trait::is_container<T>::value, qx::dao::detail::QxDao_Exist_Container<T>, type_dao_2>::type type_dao_3;
               return type_dao_3::exist(t, pDatabase);
            }
         };

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