#ifndef SPHEREHEALPIX_SEEN
#define SPHEREHEALPIX_SEEN

#include "sphericalmap.h"
#include "tvector.h"
#include "ndatablock.h"

#include "anydataobj.h"
#include "ppersist.h"

#include "HEALPixUtils.h"

namespace SOPHYA {


// ***************** CLASSE SphereHEALPix *****************************

  /*! Class SphereHEALPix */


template<class T>
class FIO_SphereHEALPix;

template<class T>
class FITS_SphereHEALPix;

template<class T>
class SphereHEALPix : public SphericalMap<T>
{
public :
// Static Methods to ease the use of HEALPix index <> angle conversion methods

  static inline int_4  nest2ring(int_4 nside,int_4 ipnest) 
         { return HEALPix::nest2ring(nside, ipnest); }
  static inline int_4  ring2nest(int_4 nside,int_4 ipring) 
         { return HEALPix::ring2nest(nside, ipring); }
  static inline int_4  ang2pix_ring(int_4 nside,double theta,double phi) 
         { return HEALPix::ang2pix_ring(nside, theta, phi); }
  static inline int_4  ang2pix_nest(int_4 nside,double theta,double phi) 
         { return HEALPix::ang2pix_nest(nside, theta, phi); }
  static inline void   pix2ang_ring(int_4 nside,int_4 ipix,double& theta,double& phi) 
         { HEALPix::pix2ang_ring(nside, ipix, theta, phi); }
  static inline void   pix2ang_nest(int_4 nside,int_4 ipix,double& theta,double& phi) 
         { HEALPix::pix2ang_nest(nside, ipix, theta, phi); }

SphereHEALPix();
SphereHEALPix(int_4 m);
SphereHEALPix(const SphereHEALPix<T>& s, bool share);
SphereHEALPix(const SphereHEALPix<T>& s);
virtual ~SphereHEALPix();

inline virtual bool   IsTemp(void) const {

    if (sliceBeginIndex_.IsTemp() != pixels_.IsTemp() || sliceLenght_.IsTemp() != pixels_.IsTemp() )
      throw PException(" l'etat 'temporaire' de la spherehealpix est incoherent"); 
    return pixels_.IsTemp();
}

inline virtual void SetTemp(bool temp=false) const 
  {
    pixels_.SetTemp(temp);
    sliceBeginIndex_.SetTemp(temp);
    sliceLenght_.SetTemp(temp);
  };
// ------------------ Definition of PixelMap abstract methods

virtual int_4 NbPixels() const;

virtual T& PixVal(int_4 k);
virtual T const& PixVal(int_4 k) const;

uint_4 NbThetaSlices() const;
virtual void GetThetaSlice(int_4 index,r_8& theta,TVector<r_8>& phi,TVector<T>& value) const;
virtual void GetThetaSlice(int_4 sliceIndex,r_8& theta, r_8& phi0, TVector<int_4>& pixelIndices,TVector<T>& value) const ;

virtual bool ContainsSph(double theta, double phi) const;
virtual int_4 PixIndexSph(double theta,double phi) const;

virtual void PixThetaPhi(int_4 k,double& theta,double& phi) const;

virtual T SetPixels(T v);

/*! Pixel Solid angle  (steradians)

    All the pixels have the same solid angle. The dummy argument is
    for compatibility with eventual pixelizations which would not 
   fulfil this requirement.
*/
inline virtual double PixSolAngle(int_4 dummy=0) const {return omeg_;}

/*  Acces to the DataBlock  */
inline       NDataBlock<T>& DataBlock()       {return pixels_;}
inline const NDataBlock<T>& DataBlock() const {return pixels_;}

// --------------- Specific methods 

virtual void Resize(int_4 m);

/*! 

\return type of storage of the map : RING or NESTED

at the moment, always RING
*/
inline virtual char* TypeOfMap() const {return "RING";};


virtual T& PixValNest(int_4 k);
virtual T const& PixValNest(int_4 k) const;

virtual int_4 PixIndexSphNest(double theta,double phi) const;

virtual void PixThetaPhiNest(int_4 k,double& theta,double& phi) const;

void Pixelize(int_4); 

int_4 NestToRing(int_4) const;

int_4 RingToNest(int_4) const;


/*! \return value of healpix nside */
inline virtual int_4 SizeIndex() const {return(nSide_);}

void print(ostream& os) const;



inline  SphereHEALPix<T>& operator = (const SphereHEALPix<T>& a) 
                                                        {return Set(a);}

 void CloneOrShare(const SphereHEALPix<T>& a);
 SphereHEALPix<T>& Set(const SphereHEALPix<T>& a);
 SphereHEALPix<T>& CopyElt(const SphereHEALPix<T>& a);


 // friend declaration for classes which handle persistence and FITS IO
 friend class FIO_SphereHEALPix<T>;
 friend class FITS_SphereHEALPix<T>;
       
protected :

// ------------- méthodes internes ----------------------
void InitNul();
void SetThetaSlices(); 

inline void setParameters(int_4 nside, int_4 nbpixels, double solangle) 
  {
    nSide_= nside;
    nPix_= nbpixels;
    omeg_= solangle;
  }

// ------------- variables internes -----------------------

int_4 nSide_;
int_4 nPix_;
double omeg_;

NDataBlock<T> pixels_;
NDataBlock<int_4> sliceBeginIndex_;	    // Rationalisation Mac. D.Y.
NDataBlock<int_4> sliceLenght_;

};



} // Fin du namespace

#endif