/****************************************************************************
**
** 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_VALIDATOR_FUNCTION_H_
#define _QX_VALIDATOR_FUNCTION_H_

#ifdef _MSC_VER
#pragma once
#endif

/*!
 * \file QxValidatorFct.h
 * \author XDL Team
 * \ingroup QxValidator
 * \brief Implementation of qx::validate<T>() function (validator engine)
 */

#include <QxValidator/IxValidatorX.h>
#include <QxValidator/QxInvalidValueX.h>

#include <QxRegister/QxClass.h>

#include <QxTraits/is_container.h>
#include <QxTraits/is_smart_ptr.h>
#include <QxTraits/is_qx_registered.h>

namespace qx
{
   template <class T>
   QxInvalidValueX validate(T &t, const QString &group);
} // namespace qx

namespace qx
{
   namespace validator
   {
      namespace detail
      {

         template <class T>
         struct QxValidator_Helper_Generic
         {

            static inline qx::QxInvalidValueX validate(T &t, const QString &group)
            {
               static_assert(qx::trait::is_qx_registered<T>::value, "qx::trait::is_qx_registered<T>::value");

               qx::QxInvalidValueX invalidValues;
               qx::IxClass *pClass = qx::QxClass<T>::getSingleton();
               if (!pClass)
               {
                  qAssert(false);
                  return invalidValues;
               }
               qx::IxValidatorX *pAllValidator = pClass->getAllValidator();
               if (!pAllValidator)
               {
                  return invalidValues;
               }
               invalidValues.setCurrentPath(pClass->getName());
               invalidValues.insert(pAllValidator->validate((&t), group));
               return invalidValues;
            }
         };

         template <class T>
         struct QxValidator_Helper_Container
         {

            static inline qx::QxInvalidValueX validate(T &t, const QString &group)
            {
               qx::QxInvalidValueX invalidValues;
               long lIndex = 0;
               for (typename T::iterator it = t.begin(); it != t.end(); ++it)
               {
                  invalidValues.setCurrentPath("[" + QString::number(lIndex) + "]");
                  invalidValues.insert(validateItem((*it), group));
                  lIndex++;
               }
               return invalidValues;
            }

         private:
            template <typename U>
            static inline qx::QxInvalidValueX validateItem(U &item, const QString &group)
            {
               return validateItem_Helper < U, std::is_pointer<U>::value || qx::trait::is_smart_ptr<U>::value > ::validate(item, group);
            }

            template <typename U, bool bIsPointer /* = true */>
            struct validateItem_Helper
            {
               static inline qx::QxInvalidValueX validate(U &item, const QString &group)
               {
                  return (item ? qx::validator::detail::QxValidator_Helper_Container<T>::validateItem((*item), group) : qx::QxInvalidValueX());
               }
            };

            template <typename U1, typename U2>
            struct validateItem_Helper<std::pair<U1, U2>, false>
            {
               static inline qx::QxInvalidValueX validate(std::pair<U1, U2> &item, const QString &group)
               {
                  return qx::validator::detail::QxValidator_Helper_Container<T>::validateItem(item.second, group);
               }
            };

            template <typename U1, typename U2>
            struct validateItem_Helper<const std::pair<U1, U2>, false>
            {
               static inline qx::QxInvalidValueX validate(const std::pair<U1, U2> &item, const QString &group)
               {
                  return qx::validator::detail::QxValidator_Helper_Container<T>::validateItem(item.second, group);
               }
            };

#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
            template <typename U1, typename U2>
            struct validateItem_Helper<QPair<U1, U2>, false>
            {
               static inline qx::QxInvalidValueX validate(QPair<U1, U2> &item, const QString &group)
               {
                  return qx::validator::detail::QxValidator_Helper_Container<T>::validateItem(item.second, group);
               }
            };

            template <typename U1, typename U2>
            struct validateItem_Helper<const QPair<U1, U2>, false>
            {
               static inline qx::QxInvalidValueX validate(const QPair<U1, U2> &item, const QString &group)
               {
                  return qx::validator::detail::QxValidator_Helper_Container<T>::validateItem(item.second, group);
               }
            };
#endif // (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))

            template <typename U>
            struct validateItem_Helper<U, false>
            {
               static qx::QxInvalidValueX validate(U &item, const QString &group) { return qx::validate(item, group); }
            };
         };

         template <class T>
         struct QxValidator_Helper_Ptr
         {

            static inline qx::QxInvalidValueX validate(T &t, const QString &group)
            {
               return (t ? qx::validate((*t), group) : qx::QxInvalidValueX());
            }
         };

         template <class T>
         struct QxValidator_Helper
         {

            static inline qx::QxInvalidValueX validate(T &t, const QString &group)
            {
               typedef typename std::conditional<std::is_pointer<T>::value, qx::validator::detail::QxValidator_Helper_Ptr<T>, qx::validator::detail::QxValidator_Helper_Generic<T>>::type type_validator_1;
               typedef typename std::conditional<qx::trait::is_smart_ptr<T>::value, qx::validator::detail::QxValidator_Helper_Ptr<T>, type_validator_1>::type type_validator_2;
               typedef typename std::conditional<qx::trait::is_container<T>::value, qx::validator::detail::QxValidator_Helper_Container<T>, type_validator_2>::type type_validator_3;

               return type_validator_3::validate(t, group);
            }
         };

      } // namespace detail
   } // namespace validator
} // namespace qx

namespace qx
{

   template <class T>
   QxInvalidValueX validate(T &t, const QString &group)
   {
      return qx::validator::detail::QxValidator_Helper<T>::validate(t, group);
   }

   template <class T>
   QxInvalidValueX validate(T &t)
   {
      return qx::validator::detail::QxValidator_Helper<T>::validate(t, "");
   }

   template <class T>
   QxInvalidValueX validate(T &t, const QStringList &groups)
   {
      QxInvalidValueX invalidValues;
      if (groups.count() <= 0)
      {
         return qx::validate(t);
      }
      for (long l = 0; l < groups.count(); l++)
      {
         invalidValues.insert(qx::validate(t, groups.at(l)));
      }
      return invalidValues;
   }

} // namespace qx

#endif // _QX_VALIDATOR_FUNCTION_H_