/* 
 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; version 2 of the
 * License.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301  USA
 */
#ifndef __changelistobjects_H
#define __changelistobjects_H

#include <iostream>
#include <assert.h>

#include "diffchange.h"
#include "grtlistdiff.h"

#include "grtpp_util.h"

namespace grt 
{

struct pless_struct
  : public std::binary_function<ValueRef, ValueRef, bool>
{ // functor for operator<
  bool operator()(const ValueRef&_Left, const ValueRef&_Right) const;
};

//////////////////////////////////////////////////////////////
// @class 
//////////////////////////////////////////////////////////////
//
// @brief 
//
//////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////

class MYSQLGRT_PUBLIC ListItemChange : public DiffChange
{
  size_t _index;
public:
  size_t get_index()const{return _index;};
  ListItemChange(ChangeType atype,size_t index):
      DiffChange(atype),_index(index){};
};

//////////////////////////////////////////////////////////////
class MYSQLGRT_PUBLIC ListItemModifiedChange : public ListItemChange
{
  ChangeSet _cs;
  ValueRef _old_value;
  ValueRef _new_value;

public:
  ListItemModifiedChange(const ValueRef old_value, const ValueRef new_value,boost::shared_ptr<DiffChange> change,size_t index)
    :ListItemChange(ListItemModified, index),_old_value(old_value),_new_value(new_value)
  {
    _cs.append(change);
  }

  virtual ValueRef get_old_value() const {return _old_value;};
  virtual ValueRef get_new_value() const {return _new_value;};

  const ChangeSet* subchanges() const { return &_cs; }

  void dump_log(int level) const
  {
    std::cout << std::string(level, ' ');
    std::cout << get_type_name() <<  std::endl;
    //_subchange->dump_log(level+1);
    (*_cs.changes.begin())->dump_log(level+1);
  }
};

boost::shared_ptr<ListItemModifiedChange> create_item_modified_change(
                                     const ValueRef &source, 
                                     const ValueRef &target,
                                     const Omf* omf,
                   const size_t index);

//////////////////////////////////////////////////////////////
class MYSQLGRT_PUBLIC ListItemAddedChange : public ListItemChange
{
  ValueRef _value;
  ValueRef _prev_value;
public:
  ListItemAddedChange(const ValueRef value, const ValueRef prev_value,size_t index)
    : ListItemChange(ListItemAdded, index), _value(value), _prev_value(prev_value)
  {
  }

  virtual ValueRef get_value() const {return _value;};

  //Used in column's AFTER statemen
  grt::ValueRef get_prev_item()const {return _prev_value;};

  void dump_log(int level) const
  {
    std::cout << std::string(level, ' ');
    if (ObjectRef::can_wrap(_value) && ObjectRef::cast_from(_value).has_member("name"))
      std::cout << " name:" << ObjectRef::cast_from(_value).get_string_member("name").c_str();
    std::cout << std::endl;
  }
};


//////////////////////////////////////////////////////////////

class MYSQLGRT_PUBLIC ListItemRemovedChange : public ListItemChange
{
  ValueRef _value;
public:
  ListItemRemovedChange(const ValueRef value,size_t index) 
    : ListItemChange(ListItemRemoved, index),_value(value)
  {
  }

  virtual ValueRef get_value() const {return _value;};

  void dump_log(int level) const
  {
    std::cout << std::string(level, ' ');
    if (ObjectRef::can_wrap(_value) && ObjectRef::cast_from(_value).has_member("name"))
      std::cout << " name:" << ObjectRef::cast_from(_value).get_string_member("name").c_str();
  }

};

//////////////////////////////////////////////////////////////

class MYSQLGRT_PUBLIC ListItemOrderChange : public ListItemChange
{
  boost::shared_ptr<ListItemModifiedChange> _subchange;
  grt::ChangeSet cs;
  ValueRef _old_value;
  ValueRef _new_value;
  ValueRef _prev_value;
public:
  ListItemOrderChange(const ValueRef &source, 
    const ValueRef &target, const Omf* omf, const ValueRef prev_value,size_t index)
    : ListItemChange(ListItemOrderChanged, index),_old_value(source),_new_value(target), _prev_value(prev_value)
  {
    _subchange= create_item_modified_change(source, target, omf,index);
    cs.append(_subchange);
  }

  virtual ValueRef get_old_value() const {return _old_value;};
  virtual ValueRef get_new_value() const {return _new_value;};
  ListItemModifiedChange* get_subchange() const {return _subchange.get();};

    //Used in column's AFTER statemen
  grt::ValueRef get_prev_item()const {return _prev_value;};

  virtual const grt::ChangeSet* subchanges() const { return &cs; }

};

}
#endif
