/*
 * Project: MoleCuilder
 * Description: creates and alters molecular systems
 * Copyright (C)  2014 Frederik Heber. All rights reserved.
 * 
 *
 *   This file is part of MoleCuilder.
 *
 *    MoleCuilder 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, either version 2 of the License, or
 *    (at your option) any later version.
 *
 *    MoleCuilder 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 MoleCuilder.  If not, see <http://www.gnu.org/licenses/>.
 */

/*
 * PopAtomsAction.cpp
 *
 *  Created on: Dec 14, 2014
 *      Author: heber
 */

// include config.h
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "CodePatterns/MemDebug.hpp"

#include <boost/bind.hpp>
#include "CodePatterns/Log.hpp"
#include "Atom/atom.hpp"
#include "World.hpp"

#include "PopAtomsAction.hpp"

using namespace MoleCuilder;

// and construct the stuff
#include "PopAtomsAction.def"
#include "Action_impl_pre.hpp"
/** =========== define the function ====================== */
ActionState::ptr SelectionPopAtomsAction::performCall() {
  // create undo state
  const std::vector<atom *> selected_atoms = World::getInstance().getSelectedAtoms();
  std::vector<atomId_t> selected_atomids(selected_atoms.size(), (atomId_t)-1);
  std::transform(
      selected_atoms.begin(), selected_atoms.end(),
      selected_atomids.begin(),
      boost::bind(&atom::getId, _1));
  LOG(1, "Popping atom selection.");
  World::getInstance().popAtomSelection();
  return ActionState::ptr(new SelectionPopAtomsState(selected_atomids, params));
}

ActionState::ptr SelectionPopAtomsAction::performUndo(ActionState::ptr _state) {
  SelectionPopAtomsState *state = static_cast<SelectionPopAtomsState *>(_state.get());
  LOG(1, "Popping atom selection.");
  World::getInstance().pushAtomSelection();

  // and re-create present selection
  for(std::vector<atomId_t>::const_iterator iter = state->selected_atomids.begin();
      iter != state->selected_atomids.end(); ++iter)
    World::getInstance().selectAtom(*iter);

  return ActionState::ptr(_state);
}

ActionState::ptr SelectionPopAtomsAction::performRedo(ActionState::ptr _state){
  LOG(1, "Popping atom selection.");
  World::getInstance().popAtomSelection();

  return ActionState::ptr(_state);
}

bool SelectionPopAtomsAction::canUndo() {
  return true;
}

bool SelectionPopAtomsAction::shouldUndo() {
  return true;
}
/** =========== end of function ====================== */