/*=========================================================================

  Program: GDCM (Grassroots DICOM). A DICOM library
  Module:  $URL$

  Copyright (c) 2006-2010 Mathieu Malaterre
  All rights reserved.
  See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
#ifndef GDCMCSAELEMENT_H
#define GDCMCSAELEMENT_H

#include "gdcmTag.h"
#include "gdcmVM.h"
#include "gdcmVR.h"
#include "gdcmByteValue.h"
#include "gdcmSmartPointer.h"

namespace gdcm
{
/**
 * \brief Class to represent a CSA Element
 * \see CSAHeader
 */
class GDCM_EXPORT CSAElement
{
public:
  CSAElement(unsigned int kf = 0):KeyField(kf) {}

  friend std::ostream& operator<<(std::ostream &os, const CSAElement &val);

  /// Set/Get Key
  unsigned int GetKey() const { return KeyField; }
  void SetKey(unsigned int key) { KeyField = key; }

  /// Set/Get Name
  const char *GetName() const { return NameField.c_str(); }
  void SetName(const char *name) { NameField = name; }

  /// Set/Get VM
  const VM& GetVM() const { return ValueMultiplicityField; }
  void SetVM(const VM &vm) { ValueMultiplicityField = vm; }

  /// Set/Get VR
  VR const &GetVR() const { return VRField; }
  void SetVR(VR const &vr) { VRField = vr; }

  /// Set/Get SyngoDT
  unsigned int GetSyngoDT() const { return SyngoDTField; }
  void SetSyngoDT(unsigned int syngodt) { SyngoDTField = syngodt; }

  /// Set/Get NoOfItems
  unsigned int GetNoOfItems() const { return NoOfItemsField; }
  void SetNoOfItems(unsigned int items) { NoOfItemsField = items; }

  /// Set/Get Value (bytes array, SQ of items, SQ of fragments):
  Value const &GetValue() const { return *DataField; }
  Value &GetValue() { return *DataField; }
  void SetValue(Value const & vl) {
    //assert( DataField == 0 );
    DataField = vl;
  }
  /// Check if CSA Element is empty
  bool IsEmpty() const { return DataField == 0; }

  /// Set
  void SetByteValue(const char *array, VL length)
    {
    ByteValue *bv = new ByteValue(array,length);
    SetValue( *bv );
    }
  /// Return the Value of CSAElement as a ByteValue (if possible)
  /// \warning: You need to check for NULL return value
  const ByteValue* GetByteValue() const {
    // Get the raw pointer from the gdcm::SmartPointer
    const ByteValue *bv = dynamic_cast<const ByteValue*>(DataField.GetPointer());
    return bv; // Will return NULL if not ByteValue
  }

  CSAElement(const CSAElement &_val)
    {
    if( this != &_val)
      {
      *this = _val;
      }
    }

  bool operator<(const CSAElement &de) const
    {
    return GetKey() < de.GetKey();
    }
  CSAElement &operator=(const CSAElement &de)
    {
    KeyField = de.KeyField;
    NameField = de.NameField;
    ValueMultiplicityField = de.ValueMultiplicityField;
    VRField = de.VRField;
    SyngoDTField = de.SyngoDTField;
    NoOfItemsField = de.NoOfItemsField;
    DataField = de.DataField; // Pointer copy
    return *this;
    }

  bool operator==(const CSAElement &de) const
    {
    return KeyField == de.KeyField
      && NameField == de.NameField
      && ValueMultiplicityField == de.ValueMultiplicityField
      && VRField == de.VRField
      && SyngoDTField == de.SyngoDTField
      //&& ValueField == de.ValueField;
      ;
    }

protected:
  unsigned int KeyField;
  std::string NameField;
  VM ValueMultiplicityField;
  VR VRField;
  unsigned int SyngoDTField;
  unsigned int NoOfItemsField;
  typedef SmartPointer<Value> DataPtr;
  DataPtr DataField;
};
//-----------------------------------------------------------------------------
inline std::ostream& operator<<(std::ostream &os, const CSAElement &val)
{
  os << val.KeyField;
  os << " - '" << val.NameField;
  os << "' VM " << val.ValueMultiplicityField;
  os << ", VR " << val.VRField;
  os << ", SyngoDT " << val.SyngoDTField;
  os << ", NoOfItems " << val.NoOfItemsField;
  os << ", Data ";
  if( val.DataField )
    {
    //val.DataField->Print( os << "'" );
    const ByteValue * bv = dynamic_cast<ByteValue*>(&*val.DataField);
    assert( bv );
    const char * p = bv->GetPointer();
    std::string str(p, p + bv->GetLength() );
    if( val.ValueMultiplicityField == VM::VM1 )
      {
      os << "'" << str.c_str() << "'";
      }
    else
      {
      std::istringstream is( str );
      std::string s;
      bool sep = false;
      while( std::getline(is, s, '\\' ) )
        {
        if( sep )
          {
          os << '\\';
          }
        sep = true;
        os << "'" << s.c_str() << "'";
        }
      //bv->Print( os << "'" );
      //os << "'";
      }
    }
  return os;
}

} // end namespace gdcm

#endif //GDCMCSAELEMENT_H
