/*
 * GLMoleculeObject_molecule.hpp
 *
 *  Created on: Mar 30, 2012
 *      Author: ankele
 */

#ifndef GLMOLECULEOBJECT_MOLECULE_HPP_
#define GLMOLECULEOBJECT_MOLECULE_HPP_

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

#include "GLMoleculeObject.hpp"

#include <Qt3D/qgeometrydata.h>

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

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

#include "GLMoleculeObject_bond.hpp"

#include "molecule.hpp"

class atom;
class bond;
class GLMoleculeObject_atom;
class GLWorldScene;

class GLMoleculeObject_molecule : public GLMoleculeObject, public Observer
{
  Q_OBJECT
public:
  GLMoleculeObject_molecule(QObject *parent, const moleculeId_t molid);
  GLMoleculeObject_molecule(QGLSceneNode *mesh[], QObject *parent, const moleculeId_t molid);
  virtual ~GLMoleculeObject_molecule();

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

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

  typedef std::pair< atomId_t, atomId_t> BondIds;
  friend std::ostream &operator<<(std::ostream &ost, const BondIds &t);

  static BondIds getBondIds(
      const bond::ptr _bond,
      const enum GLMoleculeObject_bond::SideOfBond side);

signals:
  void changed();
  void changeOccured();
  void hoverChanged(const atomId_t);
  void hoverChanged(const moleculeId_t, int);
  void indexChanged(GLMoleculeObject_molecule *, const moleculeId_t, const moleculeId_t);
  void atomClicked(atomId_t no);
  void moleculeClicked(moleculeId_t no);
  void TesselationHullChanged();
  void BoundingBoxChanged();
  void IsSelectedChanged();
  void AtomInserted(const atomId_t _id);
  void AtomRemoved(const atomId_t _id);
  void IdChanged();
  void InstanceRemoved(const moleculeId_t);

private slots:
  //!> grant GLWorldScene access to private slots
  friend class GLWorldScene;

  void wasClicked();
  void atomInserted(const atomId_t _id);
  void atomRemoved(const atomId_t _id);
  void bondInserted(const atomId_t, const atomId_t, const GLMoleculeObject_bond::SideOfBond side);
  void bondRemoved(const atomId_t leftnr, const atomId_t rightnr);
  void hoverChangedSignalled(GLMoleculeObject *ob);
  void changeAtomId(GLMoleculeObject_atom *, const atomId_t, const atomId_t);

  void setVisible(bool value);

  void activateObserver();
  void deactivateObserver();

  void resetTesselationHull();
  void resetBoundingBox();
  void resetAtoms();
  void resetIndex();
  void resetName();

  void AtomSelected(const atomId_t _id);
  void AtomUnselected(const atomId_t _id);
  void Selected();
  void Unselected();

private:
  static const molecule * const getMolecule(const moleculeId_t _id);

private:
  void addAtomBonds(
      const bond::ptr &_bond,
      const GLMoleculeObject_bond::SideOfBond _side
      );
  void addAtomBonds(const atomId_t _id);

  //!> typedef for the internal set of atoms
  typedef std::set<atomId_t> atoms_t;

  static molecule::BoundingBoxInfo initBoundingBox();

  QGeometryData updateTesselationHull() const;
  static molecule::BoundingBoxInfo updateBoundingBox(
      const boost::function<const moleculeId_t ()> &_getMolIndex);
  static moleculeId_t updateIndex();
  static std::string updateName(
      const boost::function<const moleculeId_t ()> &_getMolIndex);

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

  //!> internal variable for caching molecule ref in cstor
  const molecule * const molref;

  //!> list of channels when contained atoms needs to update
  static const Observable::channels_t AtomsChannels;
  //!> list of channels when tesselation hull needs to update
  static const Observable::channels_t HullChannels;
  //!> list of channels when bounding box needs to update
  static const Observable::channels_t BoundingBoxChannels;
  //!> list of channels when the index needs to update
  static const Observable::channels_t IndexChannels;
  //!> list of channels when the name needs to update
  static const Observable::channels_t NameChannels;

private:
  /** Observed Values **/

  //!> enumeration of observed values to match with entries in ObservedValues
  enum ObservedTypes {
    //!> contains the current molecule index
    MolIndex,
    //!> contains the current molecule name
    MolName,
    //!> contains newest version of the bounding box on request
    BoundingBox,
    //!> contains the current live set of atoms for the molecule
    PresentAtoms,
    //!> 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 _moid molecule id
   * \param _molref reference to molecule
   * \param _subjectKilled ref to function to call on subjectKilled()
   */
  static void initObservedValues(
      std::vector<boost::any> &_ObservedValues,
      const moleculeId_t _molid,
      const molecule * const _molref,
      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 molecule index contained in \a ObservedValues.
   *
   * \return molecule's index
   */
  moleculeId_t getMolIndex() const;

  /** Getter to molecule name contained in \a ObservedValues.
   *
   * \return molecule's name
   */
  std::string getMolName() const;

  /** Getter to molecule's bounding box contained in \a ObservedValues.
   *
   * \return molecule's bounding box
   */
  molecule::BoundingBoxInfo getBoundingBox() const;

  /** Getter to contained atoms contained in \a ObservedValues.
   *
   * \return molecule's contained atoms
   */
  atoms_t getPresentAtoms() 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:

  boost::function<QGeometryData ()> TesselationHullUpdater;

  //!> contains current version of the tesselation hull on request
  Cacheable<QGeometryData> TesselationHull;

  //!> contains the set of atoms displayed
  atoms_t DisplayedAtoms;

  typedef std::map< atomId_t, GLMoleculeObject_atom* > AtomNodeMap;
  typedef std::map< BondIds , GLMoleculeObject_bond* > BondNodeMap;
  AtomNodeMap AtomsinSceneMap;
  BondNodeMap BondsinSceneMap;

  atomId_t hoverAtomId;
};

std::ostream &operator<<(std::ostream &ost, const GLMoleculeObject_molecule::BondIds &t);


#endif /* GLMOLECULEOBJECT_MOLECULE_HPP_ */