/*
 *
 *  Copyright (C) 2015-2019, Open Connections GmbH
 *  All rights reserved.  See COPYRIGHT file for details.
 *
 *  This software and supporting documentation are maintained by
 *
 *    OFFIS e.V.
 *    R&D Division Health
 *    Escherweg 2
 *    D-26121 Oldenburg, Germany
 *
 *
 *  Module:  dcmfg
 *
 *  Author:  Michael Onken
 *
 *  Purpose: Class for managing Plane Position (Volume) Functional Group
 *
 */

#ifndef FGPLANEPOSVOL_H
#define FGPLANEPOSVOL_H

#include "dcmtk/config/osconfig.h"

#include "dcmtk/dcmdata/dcitem.h"
#include "dcmtk/dcmdata/dcvrfd.h"
#include "dcmtk/dcmfg/fgbase.h"

/** Class representing the Plane Position (Volume) Functional Group that
 *  identifies the position of the plane of this frame.
 */
class DCMTK_DCMFG_EXPORT FGPlanePositionVolume : public FGBase
{
public:
    /** Constructor, creates empty functional group
     */
    FGPlanePositionVolume();

    /** Virtual destructor, frees memory
     */
    virtual ~FGPlanePositionVolume();

    /** Returns a deep copy of this object
     *  @return  Deep copy of this object
     */
    virtual FGBase* clone() const;

    /** Returns shared type of this functional group (can be shared or per-frame,
     *  i.e.\ both)
     *  @return Always returns DcmFGTypes::EFGS_BOTH
     */
    virtual DcmFGTypes::E_FGSharedType getSharedType() const
    {
        return DcmFGTypes::EFGS_BOTH;
    }

    /** Clears all data
     */
    virtual void clearData();

    /** Check whether data of this functional group is valid
     *  @return EC_Normal if data is valid, error otherwise
     */
    virtual OFCondition check() const;

    /** Read functional group from item, must contain the Plane Position (Volume)
     *  Sequence
     *  @param  item The item to read from
     *  @return EC_Normal if reading was successful, error otherwise
     */
    virtual OFCondition read(DcmItem& item);

    /** Writes functional group to item, i.e.\ writes the Plane Position (Volume)
     *  Sequence
     *  @param  item The item to write to
     *  @return EC_Normal if writing was successful, error otherwise
     */
    virtual OFCondition write(DcmItem& item);

    // --- get() functionality ---

    /** Get Image Position Volume
     *  @param  value Reference to variable in which the value should be stored
     *  @param  pos Index of the value to get (0..vm-1)
     *  @return EC_Normal if successful, an error code otherwise
     */
    virtual OFCondition getImagePositionVolume(Float64& value, const unsigned long pos = 0);

    /** Retrieve all values of Image Position Volume at the same time
     *  @param  valueX X coordinate of upper left hand corner voxel in mm
     *  @param  valueY Y coordinate of upper left hand corner voxel in mm
     *  @param  valueZ Z coordinate of upper left hand corner voxel in mm
     *  @return EC_Normal if successful, an error code otherwise
     */
    virtual OFCondition getImagePositionVolume(Float64& valueX, Float64& valueY, Float64& valueZ);

    // --- set() functionality ---

    /** Set Image Position Volume, i.e.\ the x/y/z coordinates of the upper left
     *  hand corner (center of the first voxel transmitted) of the frame, in mm.
     *  @param  value X,Y or Z coordinate of upper left hand corner voxel in mm
     *  @param  pos pos 0 is x, pos 1 is Y, pos 2 addresses Z coordinate
     *  @param  checkValue Check 'value'. Not evaluated (here for consistency
     *          with other setter functions).
     *  @return EC_Normal if successful, an error code otherwise
     */
    virtual OFCondition
    setImagePositionVolume(const Float64& value, const unsigned long pos = 0, const OFBool checkValue = OFTrue);

    /** Set Image Position Volume, i.e.\ the x/y/z coordinates of the upper left
     *  hand corner (center of the first voxel transmitted) of the frame, in mm.
     *  @param  valueX X coordinate of upper left hand corner voxel in mm
     *  @param  valueY coordinate of upper left hand corner voxel in mm
     *  @param  valueZ coordinate of upper left hand corner voxel in mm
     *  @param  checkValue Check 'value'. Not evaluated (here for consistency
     *          with other setter functions).
     *  @return EC_Normal if successful, an error code otherwise
     */
    virtual OFCondition setImagePositionVolume(const Float64& valueX,
                                               const Float64& valueY,
                                               const Float64& valueZ,
                                               const OFBool checkValue = OFTrue);

    /** Comparison operator that compares the normalized value of this object
     *  with a given object of the same type, i.e.\ the elements within both
     *  functional groups (this and rhs parameter) are compared by value!
     *  Both objects (this and rhs) need to have the same type (i.e.\ both
     *  FGUnknown) to be comparable. This function is used in order
     *  to decide whether a functional group already exists, or is new. This
     *  is used in particular to find out whether a given functional group
     *  can be shared (i.e.\ the same information already exists as shared
     *  functional group) or is different from the same shared group. In that
     *  case the shared functional group must be distributed into per-frame
     *  functional groups, instead. The exact implementation for implementing
     *  the comparison is not relevant. However, it must be a comparison
     *  by value.
     *  @param  rhs the right hand side of the comparison
     *  @return 0 if the object values are equal.
     *          -1 if either the value of the first component that does not match
     *          is lower in the this object, or all compared components match
     *          but this component is shorter. Also returned if this type and
     *          rhs type (DcmFGTypes::E_FGType) do not match.
     *          1 if either the value of the first component that does not match
     *          is greater in this object, or all compared components match
     *          but this component is longer.
     */
    virtual int compare(const FGBase& rhs) const;

private:
    /* Content of Plane Position (Volume) Macro */

    /// Image Position (Volume) (FD, VM 3, Required type 1)
    DcmFloatingPointDouble m_ImagePositionVolume;
};

#endif // FGPLANEPOSVOL_H
