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#include "G4RegularNavigationHelper.hh"
#include "G4UIcommand.hh"
#include "G4PhantomParameterisation.hh"

//-----------------------------------------------------------------------
inline void G4EnergySplitter::GetLastVoxelID( G4int& voxelID)
{	
  voxelID = (*(G4RegularNavigationHelper::theStepLengths.begin())).first;
}

//-----------------------------------------------------------------------
inline void G4EnergySplitter::GetFirstVoxelID( G4int& voxelID)
{
  voxelID =  (*(G4RegularNavigationHelper::theStepLengths.rbegin())).first;
}

//-----------------------------------------------------------------------
inline void G4EnergySplitter::GetVoxelID( G4int stepNo, G4int& voxelID )
{
  if( stepNo < 0 || stepNo >= G4int(G4RegularNavigationHelper::theStepLengths.size()) ) {
  G4Exception("G4EnergySplitter::GetVoxelID",
	      "Invalid stepNo, smaller than 0 or bigger or equal to number of voxels traversed",
	      FatalErrorInArgument,
	      G4String("stepNo = " + G4UIcommand::ConvertToString(stepNo) + ", number of voxels = " + G4UIcommand::ConvertToString(G4int(G4RegularNavigationHelper::theStepLengths.size())) ).c_str());
  }
  std::vector< std::pair<G4int,G4double> >::const_iterator ite = G4RegularNavigationHelper::theStepLengths.begin();
  advance( ite, stepNo );
  voxelID = (*ite).first;

}


//-----------------------------------------------------------------------
inline void G4EnergySplitter::GetStepLength( G4int stepNo, G4double& stepLength )
{
  std::vector< std::pair<G4int,G4double> >::const_iterator ite = G4RegularNavigationHelper::theStepLengths.begin();
  advance( ite, stepNo );
  stepLength = (*ite).second;
}

//-----------------------------------------------------------------------
inline void G4EnergySplitter::GetVoxelIDAndLength( G4int stepNo, G4int& voxelID, G4double& stepLength )
{
  GetVoxelID( stepNo, voxelID );
  GetStepLength( stepNo, stepLength);
}

//-----------------------------------------------------------------------
inline void G4EnergySplitter::GetLengthAndEnergyDeposited( G4int stepNo, G4int& voxelID, G4double& stepLength, G4double &energyLoss)
{
  GetVoxelIDAndLength( stepNo, voxelID, stepLength );

  energyLoss = theEnergies[stepNo];
}

//-----------------------------------------------------------------------
inline void G4EnergySplitter::GetLengthAndInitialEnergy( G4double &preStepEnergy, G4int stepNo, G4int& voxelID, G4double& stepLength, G4double &initialEnergy)
{
  GetVoxelIDAndLength( stepNo, voxelID, stepLength );

  initialEnergy = preStepEnergy;
  for( G4int ii = 0; ii < stepNo; ii++ ){
    initialEnergy -= theEnergies[stepNo];
  }
}

//-----------------------------------------------------------------------
inline void G4EnergySplitter::SetNIterations( G4int niter )
{
  theNIterations = niter;
}

//-----------------------------------------------------------------------
inline G4Material* G4EnergySplitter::GetVoxelMaterial( G4int stepNo )
{
  if( !thePhantomParam ) GetPhantomParam(TRUE);
  G4int voxelID;
  GetVoxelID( stepNo, voxelID );
  return thePhantomParam->GetMaterial( voxelID );
}