/*
 *
 *  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 (Patient) Functional Group
 *
 */

#ifndef FGPLANPO_H
#define FGPLANPO_H

#include "dcmtk/config/osconfig.h"

#include "dcmtk/dcmdata/dcsequen.h"
#include "dcmtk/dcmdata/dcvrds.h"
#include "dcmtk/dcmfg/fgbase.h"

/** Class representing the Plane Position (Patient) Functional Group containing
 *  the x, y, and z coordinates of the upper left hand corner (center of the
 *  first voxel transmitted) of the frame.
 */
class DCMTK_DCMFG_EXPORT FGPlanePosPatient : public FGBase
{
public:
    /** Constructor, creates empty functional group
     */
    FGPlanePosPatient();

    /** Destructor, frees memory
     */
    virtual ~FGPlanePosPatient();

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

    /** Convenience function to create minimal functional group
     *  @param  imagePositionPatientX The X coordinate of the upper left hand
     *          corner of the the frame in mm.
     *  @param  imagePositionPatientY The Y coordinate of the upper left hand
     *          corner of the the frame in mm.
     *  @param  imagePositionPatientZ The Z coordinate of the upper left hand
     *          corner of the the frame in mm.
     *  @return Newly created Plane Position Functional Group or NULL in case of error
     */
    static FGPlanePosPatient* createMinimal(const OFString& imagePositionPatientX,
                                            const OFString& imagePositionPatientY,
                                            const OFString& imagePositionPatientZ);

    /** Returns that this functional group can be shared or per-frame (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 in 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 Sequence
     *  @param  item The item to read from
     *  @return EC_Normal if reading was successful, error otherwise
     */
    virtual OFCondition read(DcmItem& item);

    /** Write functional group to item, will write the Plane Position Sequence
     *  @param  item The item to write to
     *  @return EC_Normal if writing was successful, error otherwise
     */
    virtual OFCondition write(DcmItem& item);

    /** 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;

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

    /** Get Image Position Patient
     *  @param  value Reference to variable in which the value should be stored
     *  @param  pos Index of the value to get (0..vm-1), -1 for all components
     *  @return EC_Normal if successful, an error code otherwise
     */
    virtual OFCondition getImagePositionPatient(OFString& value, const signed long pos);

    /** Retrieve all values of Image Orientation Patient at the same time
     *  @param  coordinateX X coordinate of upper left hand corner voxel in mm
     *  @param  coordinateY Y coordinate of upper left hand corner voxel in mm
     *  @param  coordinateZ Z coordinate of upper left hand corner voxel in mm
     *  @return EC_Normal if successful, an error code otherwise
     */
    virtual OFCondition getImagePositionPatient(Float64& coordinateX, Float64& coordinateY, Float64& coordinateZ);

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

    /** Set Image Position Patient. The x, y, and z coordinates of the upper left
     *  hand corner (center of the first voxel transmitted) of the frame, in mm.
     *  @param  coordinateX X coordinate of upper left hand corner voxel in mm
     *  @param  coordinateY Y coordinate of upper left hand corner voxel in mm
     *  @param  coordinateZ Z coordinate of upper left hand corner voxel in mm
     *  @param  checkValue Check coordinates for validity, including VR (DS)
     *  @return EC_Normal if successful, an error code otherwise
     */
    virtual OFCondition setImagePositionPatient(const OFString& coordinateX,
                                                const OFString& coordinateY,
                                                const OFString& coordinateZ,
                                                const OFBool checkValue = OFTrue);

private:
    /* Content of Plane Position Patient Macro */

    /// Image Position (Patient)   (DS, VM 3, Required type 1C)
    DcmDecimalString m_ImagePositionPatient;
};

#endif // FGPLANPO_H
