/*
 * Project: MoleCuilder
 * Description: creates and alters molecular systems
 * Copyright (C)  2015 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/>.
 */

/*
 * QtObservedAtom.cpp
 *
 *  Created on: Oct 28, 2015
 *      Author: heber
 */


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

#include "QtObservedAtom.hpp"

#include "UIElements/Qt4/InstanceBoard/QtObservedInstanceBoard.hpp"

#include "CodePatterns/MemDebug.hpp"

#include <boost/assign.hpp>

#include "Atom/atom.hpp"
#include "Bond/bond.hpp"
#include "Descriptors/AtomIdDescriptor.hpp"
#include "Element/element.hpp"
#include "World.hpp"

#include "UIElements/Qt4/InstanceBoard/ObservedValue_wCallback.hpp"

using namespace boost::assign;

static const Observable::channels_t getAtomBondsChannels()
{
  Observable::channels_t channels;
  channels += AtomObservable::BondsAdded, AtomObservable::BondsRemoved;
  return channels;
}

static const Observable::channels_t getAllObservedChannels()
{
  Observable::channels_t channels;
  channels +=
      AtomObservable::IndexChanged,
      AtomObservable::BondsAdded,
      AtomObservable::BondsRemoved,
      AtomObservable::MoleculeChanged,
      AtomObservable::NameChanged,
      AtomObservable::ElementChanged,
      AtomObservable::PositionChanged,
      AtomObservable::SelectionChanged;
  return channels;
}

// static entities
const Observable::channels_t
QtObservedAtom::AtomIndexChannels(1, AtomObservable::IndexChanged);
const Observable::channels_t
QtObservedAtom::AtomBondsChannels(getAtomBondsChannels());
const Observable::channels_t
QtObservedAtom::AtomElementChannels(1, AtomObservable::ElementChanged);
const Observable::channels_t
QtObservedAtom::MoleculeChangedChannels(1, AtomObservable::MoleculeChanged);
const Observable::channels_t
QtObservedAtom::AtomNameChannels(1, AtomObservable::NameChanged);
const Observable::channels_t
QtObservedAtom::AtomPositionChannels(1, AtomObservable::PositionChanged);
const Observable::channels_t
QtObservedAtom::AtomSelectedChannels(1, AtomObservable::SelectionChanged);

QtObservedAtom::QtObservedAtom(
    const atomId_t _id,
    const atom * const _atom,
    QtObservedInstanceBoard &_board,
    QWidget * _parent) :
  QWidget(_parent),
  Observer("QtObservedAtom"),
  subjectKilledCount(0),
  AllsignedOnChannels(getAllObservedChannels().size()),
  signedOffChannels(0),
  owner(NULL),
  oldId(_id),
  index(static_cast<const ObservedValue_Index_t>(const_cast<const QtObservedAtom * const>(this))),
  board(_board),
  BoardIsGone(false),
  ObservedValues(QtObservedAtom::MAX_ObservedTypes)
{
  boost::function<void ()> atomSubjectKilled(
      boost::bind(&QtObservedAtom::countValuesSubjectKilled,
          boost::ref(*this),
          boost::bind(&QtObservedAtom::getIndex, boost::ref(*this))));
  initObservedValues( ObservedValues, _id, _atom, atomSubjectKilled);

  // activating Observer is done by ObservedValueContainer when it's inserted
}

QtObservedAtom::~QtObservedAtom()
{
  boost::any_cast<ObservedValue_wCallback<atomId_t, ObservedValue_Index_t> *>(ObservedValues[AtomIndex])->noteCallBackIsGone();
  boost::any_cast<ObservedValue_wCallback<ListOfBonds_t, ObservedValue_Index_t> *>(ObservedValues[AtomBonds])->noteCallBackIsGone();
  boost::any_cast<ObservedValue_wCallback<atomicNumber_t, ObservedValue_Index_t> *>(ObservedValues[AtomElement])->noteCallBackIsGone();
  boost::any_cast<ObservedValue_wCallback<QtObservedMolecule*, ObservedValue_Index_t> *>(ObservedValues[MoleculeRef])->noteCallBackIsGone();
  boost::any_cast<ObservedValue_wCallback<std::string, ObservedValue_Index_t> *>(ObservedValues[AtomName])->noteCallBackIsGone();
  boost::any_cast<ObservedValue_wCallback<Vector, ObservedValue_Index_t> *>(ObservedValues[AtomPosition])->noteCallBackIsGone();
  boost::any_cast<ObservedValue_wCallback<bool, ObservedValue_Index_t> *>(ObservedValues[AtomSelected])->noteCallBackIsGone();

  deactivateObserver();

  destroyObservedValues(ObservedValues);
}

const atom * const QtObservedAtom::getAtomConst(const atomId_t _id)
{
  const atom * const _atom = const_cast<const World &>(World::getInstance()).
      getAtom(AtomById(_id));
  return _atom;
}

atom * const QtObservedAtom::getAtom(const atomId_t _id)
{
  atom * const _atom = World::getInstance().getAtom(AtomById(_id));
  return _atom;
}

#ifdef HAVE_INLINE
inline
#endif
atomId_t QtObservedAtom::updateIndex(const atom &_atomref)
{
  return _atomref.getId();
}

QtObservedAtom::ListOfBonds_t QtObservedAtom::updateBonds(
    const atom &_atom)
{
  ListOfBonds_t ListOfBonds;
  // make sure bonds is up-to-date
  const BondList ListBonds = _atom.getListOfBonds();
  for (BondList::const_iterator iter = ListBonds.begin();
      iter != ListBonds.end();
      ++iter)
    ListOfBonds.insert( ListOfBonds.end(), std::make_pair(
        (*iter)->leftatom->getId(),
        (*iter)->rightatom->getId()) );
  return ListOfBonds;
}

#ifdef HAVE_INLINE
inline
#endif
atomicNumber_t QtObservedAtom::updateElement(
    const atom &_atom)
{
  return _atom.getElementNo();
}

#ifdef HAVE_INLINE
inline
#endif
QtObservedMolecule* QtObservedAtom::updateMoleculeRef(
    const atom &_atom)
{
  if (_atom.getMolecule() != NULL) {
    const moleculeId_t molid = _atom.getMolecule()->getId();
    const QtObservedMolecule::ptr mol = board.getObservedMolecule(molid);
    ASSERT(mol,
        "QtObservedAtom::updateMoleculeRef() - could not update the ref, "
        +toString(molid)+" unknown to Instance board?");
    return mol.get();
  } else {
    return (QtObservedMolecule*)NULL;
  }
}

#ifdef HAVE_INLINE
inline
#endif
std::string QtObservedAtom::updateName(
    const atom &_atom)
{
  return _atom.getName();
}

#ifdef HAVE_INLINE
inline
#endif
Vector QtObservedAtom::updatePosition(
    const atom &_atom)
{
  return _atom.getPosition();
}

#ifdef HAVE_INLINE
inline
#endif
bool QtObservedAtom::updateSelected(
    const atom &_atom)
{
  return _atom.getSelected();
}

void QtObservedAtom::update(Observable *publisher)
{
  ASSERT(0, "QtObservedAtom::update() - we are not signed on for global updates.");
}

void QtObservedAtom::subjectKilled(Observable *publisher)
{
  ++signedOffChannels;

  checkForRemoval(getIndex());
}

void QtObservedAtom::countValuesSubjectKilled(ObservedValue_Index_t _id)
{
  ASSERT( _id == getIndex(),
      "QtObservedAtom::countValuesSubjectKilled() - atom "+toString(getIndex())
      +" received countValuesSubjectKilled for atom id "+toString(_id)+".");

  ++subjectKilledCount;

  checkForRemoval(_id);
}

#ifdef HAVE_INLINE
inline
#endif
void QtObservedAtom::checkForRemoval(ObservedValue_Index_t _id)
{
  if ((signedOffChannels == AllsignedOnChannels) && (subjectKilledCount == MAX_ObservedTypes)) {
    // remove owner: no more signOff needed
    owner = NULL;

    emit atomRemoved();

    if (!BoardIsGone) {
      board.markObservedAtomAsDisconnected(_id);
      board.markObservedAtomForErase(_id);
    }
  }
}

void QtObservedAtom::recieveNotification(Observable *publisher, Notification_ptr notification)
{
  // ObservedValues have been updated before, hence convert updates to Qt's signals
  switch (notification->getChannelNo()) {
    case AtomObservable::IndexChanged:
    {
      const atomId_t newId = getAtomIndex();
      emit indexChanged(oldId, newId);
      oldId = newId;
      break;
    }
    case AtomObservable::BondsAdded:
    case AtomObservable::BondsRemoved:
      emit bondsChanged();
      break;
    case AtomObservable::ElementChanged:
      emit elementChanged();
      break;
    case AtomObservable::MoleculeChanged:
      emit moleculeChanged();
      break;
    case AtomObservable::NameChanged:
      emit nameChanged();
      break;
    case AtomObservable::PositionChanged:
      emit positionChanged();
      break;
    case AtomObservable::SelectionChanged:
      emit selectedChanged();
      break;
    default:
      ASSERT(0, "QtObservedAtom::recieveNotification() - we are not signed on to channel "
          +toString(notification->getChannelNo())+" of the atom.");
      break;
  }
}

void QtObservedAtom::activateObserver()
{
  atom * atomref = getAtom(getAtomIndex());
  if (atomref != NULL) {
    Observable::channels_t channels = getAllObservedChannels();
    owner = static_cast<const Observable *>(atomref);
    for (Observable::channels_t::const_iterator iter = channels.begin();
        iter != channels.end(); ++iter)
      owner->signOn(this, *iter);
    if (!BoardIsGone)
      board.markObservedAtomAsConnected(getIndex());
  } else
    signedOffChannels = AllsignedOnChannels;
}

void QtObservedAtom::deactivateObserver()
{
  // sign Off
  if (owner != NULL) {
    Observable::channels_t channels = getAllObservedChannels();
    for (Observable::channels_t::const_iterator iter = channels.begin();
        iter != channels.end(); ++iter)
      owner->signOff(this, *iter);
    owner = NULL;
    signedOffChannels = AllsignedOnChannels;
    if (!BoardIsGone)
      board.markObservedAtomAsDisconnected(getIndex());
  }
}

void QtObservedAtom::initObservedValues(
    ObservedValues_t &_ObservedValues,
    const atomId_t _id,
    const atom * const _atomref,
    const boost::function<void()> &_subjectKilled)
{
  ASSERT( _ObservedValues.size() == MAX_ObservedTypes,
      "QtObservedAtom::initObservedValues() - given ObservedValues has not correct size.");

  // fill ObservedValues: then all the other that need index
  const boost::function<atomId_t ()> AtomIndexUpdater(
      boost::bind(&QtObservedAtom::updateIndex, boost::cref(*_atomref)));
  const boost::function<ListOfBonds_t ()> AtomBondsUpdater(
      boost::bind(&QtObservedAtom::updateBonds, boost::cref(*_atomref)));
  const boost::function<atomicNumber_t ()> AtomElementUpdater(
      boost::bind(&QtObservedAtom::updateElement, boost::cref(*_atomref)));
  const boost::function<std::string ()> AtomNameUpdater(
      boost::bind(&QtObservedAtom::updateName, boost::cref(*_atomref)));
  const boost::function<Vector ()> AtomPositionUpdater(
      boost::bind(&QtObservedAtom::updatePosition, boost::cref(*_atomref)));
  const boost::function<bool ()> AtomSelectedUpdater(
      boost::bind(&QtObservedAtom::updateSelected, boost::cref(*_atomref)));
  const boost::function<QtObservedMolecule* ()> MoleculeRefUpdater(
      boost::bind(&QtObservedAtom::updateMoleculeRef, this, boost::cref(*_atomref)));

  _ObservedValues[AtomIndex] = new ObservedValue_wCallback<atomId_t, ObservedValue_Index_t>(
      _atomref,
      AtomIndexUpdater,
      "AtomIndex_"+toString(_id),
      _id,
      AtomIndexChannels,
      _subjectKilled);
  _ObservedValues[AtomBonds] = new ObservedValue_wCallback<ListOfBonds_t, ObservedValue_Index_t>(
      _atomref,
      AtomBondsUpdater,
      "AtomBonds_"+toString(_id),
      AtomBondsUpdater(),
      AtomBondsChannels,
      _subjectKilled);
  _ObservedValues[AtomElement] = new ObservedValue_wCallback<atomicNumber_t, ObservedValue_Index_t>(
      _atomref,
      AtomElementUpdater,
      "AtomElement"+toString(_id),
      AtomElementUpdater(),
      AtomElementChannels,
      _subjectKilled);
  _ObservedValues[AtomName] = new ObservedValue_wCallback<std::string, ObservedValue_Index_t>(
      _atomref,
      AtomNameUpdater,
      "AtomName"+toString(_id),
      AtomNameUpdater(),
      AtomNameChannels,
      _subjectKilled);
  _ObservedValues[AtomPosition] = new ObservedValue_wCallback<Vector, ObservedValue_Index_t>(
      _atomref,
      AtomPositionUpdater,
      "AtomPosition_"+toString(_id),
      AtomPositionUpdater(),
      AtomPositionChannels,
      _subjectKilled);
  _ObservedValues[AtomSelected] = new ObservedValue_wCallback<bool, ObservedValue_Index_t>(
      _atomref,
      AtomSelectedUpdater,
      "AtomSelected_"+toString(_id),
      AtomSelectedUpdater(),
      AtomSelectedChannels,
      _subjectKilled);
  _ObservedValues[MoleculeRef] = new ObservedValue_wCallback<QtObservedMolecule*, ObservedValue_Index_t>(
      _atomref,
      MoleculeRefUpdater,
      "AtomMoleculeIndex"+toString(_id),
      MoleculeRefUpdater(),
      MoleculeChangedChannels,
      _subjectKilled);
}

void QtObservedAtom::destroyObservedValues(
    std::vector<boost::any> &_ObservedValues)
{
  delete boost::any_cast<ObservedValue_wCallback<atomId_t, ObservedValue_Index_t> *>(_ObservedValues[AtomIndex]);
  delete boost::any_cast<ObservedValue_wCallback<ListOfBonds_t, ObservedValue_Index_t> *>(_ObservedValues[AtomBonds]);
  delete boost::any_cast<ObservedValue_wCallback<atomicNumber_t, ObservedValue_Index_t> *>(_ObservedValues[AtomElement]);
  delete boost::any_cast<ObservedValue_wCallback<std::string, ObservedValue_Index_t> *>(_ObservedValues[AtomName]);
  delete boost::any_cast<ObservedValue_wCallback<Vector, ObservedValue_Index_t> *>(_ObservedValues[AtomPosition]);
  delete boost::any_cast<ObservedValue_wCallback<bool, ObservedValue_Index_t> *>(_ObservedValues[AtomSelected]);
  delete boost::any_cast<ObservedValue_wCallback<QtObservedMolecule*, ObservedValue_Index_t> *>(_ObservedValues[MoleculeRef]);
  _ObservedValues.clear();
}

ObservedValue_Index_t QtObservedAtom::getIndex() const
{
  ASSERT( index != NULL,
      "QtObservedAtom::getIndex() - index is NULL");
  return index;
}

const atomId_t& QtObservedAtom::getAtomIndex() const
{
  return boost::any_cast<ObservedValue_wCallback<atomId_t, ObservedValue_Index_t> *>(ObservedValues[AtomIndex])->get();
}

const QtObservedAtom::ListOfBonds_t& QtObservedAtom::getAtomBonds() const
{
  return boost::any_cast<ObservedValue_wCallback<ListOfBonds_t, ObservedValue_Index_t> *>(ObservedValues[AtomBonds])->get();
}

const atomicNumber_t& QtObservedAtom::getAtomElement() const
{
  return boost::any_cast<ObservedValue_wCallback<atomicNumber_t, ObservedValue_Index_t> *>(ObservedValues[AtomElement])->get();
}

const std::string& QtObservedAtom::getAtomName() const
{
  return boost::any_cast<ObservedValue_wCallback<std::string, ObservedValue_Index_t> *>(ObservedValues[AtomName])->get();
}

const Vector& QtObservedAtom::getAtomPosition() const
{
  return boost::any_cast<ObservedValue_wCallback<Vector, ObservedValue_Index_t> *>(ObservedValues[AtomPosition])->get();
}

const bool QtObservedAtom::getAtomSelected() const
{
  return boost::any_cast<ObservedValue_wCallback<bool, ObservedValue_Index_t> *>(ObservedValues[AtomSelected])->get();
}

const QtObservedMolecule* const QtObservedAtom::getMoleculeRef() const
{
  return boost::any_cast<ObservedValue_wCallback<QtObservedMolecule*, ObservedValue_Index_t> *>(ObservedValues[MoleculeRef])->get();
}