/*
 * GLMoleculeObject_atom.hpp
 *
 *  Created on: Aug 17, 2011
 *      Author: heber
 */

#ifndef GLMOLECULEOBJECT_ATOM_HPP_
#define GLMOLECULEOBJECT_ATOM_HPP_

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

#include "GLMoleculeObject.hpp"

#include <vector>
#include <boost/any.hpp>

#include "CodePatterns/ObservedValue.hpp"
#include "CodePatterns/Observer/Observer.hpp"

#include "LinearAlgebra/Vector.hpp"

#include "Bond/bond.hpp"
#include "UIElements/Views/Qt4/Qt3D/GLMoleculeObject_bond.hpp"
#include "types.hpp"

class GLWorldScene;

class GLMoleculeObject_atom : public GLMoleculeObject, Observer
{
  Q_OBJECT
public:
  GLMoleculeObject_atom(QGLSceneNode *mesh[], QObject *parent, const atomId_t id);
  virtual ~GLMoleculeObject_atom();

  void draw(QGLPainter *painter, const QVector4D &cameraPlane);

  // Observer functions
  void update(Observable *publisher);
  void subjectKilled(Observable *publisher);
  void recieveNotification(Observable *publisher, Notification_ptr notification);

public slots:
  void Selected();
  void Unselected();

private slots:
  void wasClicked();
  void resetIndex();
  void resetElement();
  void resetPosition();
  void resetBonds();

signals:
  void clicked(atomId_t);
  void BondsAdded(const atomId_t _left, const atomId_t _right, const GLMoleculeObject_bond::SideOfBond side);
  void BondsRemoved(const atomId_t _left, const atomId_t _right);
  void indexChanged(GLMoleculeObject_atom *ob, const atomId_t oldId, const atomId_t newId);
  void idChanged();
  void positionChanged();
  void elementChanged();
  void bondsChanged();
  void InstanceRemoved(const atomId_t);

private:
  //!> grant GLMoleculeObject_molecule acess to reset functions
  friend class GLMoleculeObject_molecule;

  //!> typedef for list of bonds, defined by pairs of atom ids
  typedef std::vector< std::pair<atomId_t, atomId_t> > ListOfBonds_t;

  static const atom * const getAtomConst(const atomId_t _id);
  static atom * const getAtom(const atomId_t _id);

  static atomId_t updateIndex();
  static Vector updatePosition(
      const boost::function<const atomId_t ()> &_getAtomIndex);
  static atomicNumber_t updateElement(
      const boost::function<const atomId_t ()> &_getAtomIndex);
  static ListOfBonds_t updateBonds(
      const boost::function<const atomId_t ()> &_getAtomIndex);

  void activateObserver();
  void deactivateObserver();

private:

  //!> current list of bonds to compare new onw against for changes
  ListOfBonds_t ListOfBonds;

  //!> temporary variable used in cstor
  atom * const atomref;

private:
  /** Observed Values **/

  //!> enumeration of observed values to match with entries in ObservedValues
  enum ObservedTypes {
    //!> contains the current atom index
    AtomIndex,
    //!> contains the current atom position
    AtomPosition,
    //!> contains the current atom element
    AtomElement,
    //!> contains the current set of bonds atoms fort the atom
    AtomBonds,
    //!> gives the size of the enumeration
    MAX_ObservedTypes
  };

  //!> vector with all observed values
  std::vector<boost::any> ObservedValues;

  /** Initializes all \a ObservedValues entries.
   *
   * \param _ObservedValues vector of ObservedValue to be filled
   * \param _id atom id
   * \param _atomref reference to atom
   * \param _subjectKilled ref to function to call on subjectKilled()
   */
  static void initObservedValues(
      std::vector<boost::any> &_ObservedValues,
      const atomId_t _id,
      const atom * const _atomref,
      const boost::function<void()> &_subjectKilled);

  /** Destroys all \a ObservedValues entries.
   *
   * \param _ObservedValues vector of ObservedValue to be destroyed
   */
  static void destroyObservedValues(
      std::vector<boost::any> &_ObservedValues);

  /** Getter to atom index contained in \a ObservedValues.
   *
   * \return atom's index
   */
  atomId_t getAtomIndex() const;

  /** Getter to atom position contained in \a ObservedValues.
   *
   * \return atom's position
   */
  Vector getAtomPosition() const;

  /** Getter to atom element contained in \a ObservedValues.
   *
   * \return atom's elemnt
   */
  atomicNumber_t getAtomElement() const;

  /** Getter to atom bonds contained in \a ObservedValues.
   *
   * \return atom's bonds
   */
  ListOfBonds_t getAtomBonds() const;

  /** Counts how many ObservedValues got subjectKilled.
   *
   * This is used to give InstanceRemoved() signal only when each and every
   * ObservedValue (and the instance itself) has been subjectKilled by the
   * monitored Observable. Only then can we safely remove the instance.
   *
   */
  void countsubjectKilled();

  //!> counts how many ObservedValues have already been subjectKilled()
  mutable size_t subjectKilledCount;

private:

  //!> list of channels when index needs to update
  static const Observable::channels_t AtomIndexChannels;
  //!> list of channels when position needs to update
  static const Observable::channels_t AtomPositionChannels;
  //!> list of channels when element needs to update
  static const Observable::channels_t AtomElementChannels;
  //!> list of channels when bonds needs to update
  static const Observable::channels_t AtomBondsChannels;

  //!> the Observable we are signed on, also indicates whether we are sign on (not NULL)
  const Observable *owner;
};



#endif /* GLMOLECULEOBJECT_ATOM_HPP_ */