//
// ********************************************************************
// * License and Disclaimer                                           *
// *                                                                  *
// * The  Geant4 software  is  copyright of the Copyright Holders  of *
// * the Geant4 Collaboration.  It is provided  under  the terms  and *
// * conditions of the Geant4 Software License,  included in the file *
// * LICENSE and available at  http://cern.ch/geant4/license .  These *
// * include a list of copyright holders.                             *
// *                                                                  *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work  make  any representation or  warranty, express or implied, *
// * regarding  this  software system or assume any liability for its *
// * use.  Please see the license in the file  LICENSE  and URL above *
// * for the full disclaimer and the limitation of liability.         *
// *                                                                  *
// * This  code  implementation is the result of  the  scientific and *
// * technical work of the GEANT4 collaboration.                      *
// * By using,  copying,  modifying or  distributing the software (or *
// * any work based  on the software)  you  agree  to acknowledge its *
// * use  in  resulting  scientific  publications,  and indicate your *
// * acceptance of all terms of the Geant4 Software license.          *
// ********************************************************************
//
//
// $Id: G4ShellEMDataSet.cc,v 1.15 2007/10/15 08:36:35 pia Exp $
// GEANT4 tag $Name: geant4-09-01-patch-02 $
//
// Author: Maria Grazia Pia (Maria.Grazia.Pia@cern.ch)
//
// History:
// -----------
// 1 Aug 2001   MGP        Created
// 09.10.01   V.Ivanchenko Add case z=0
//
// -------------------------------------------------------------------

#include "G4ShellEMDataSet.hh"
#include "G4EMDataSet.hh"
#include "G4VDataSetAlgorithm.hh"
#include <fstream>
#include <sstream>


G4ShellEMDataSet::G4ShellEMDataSet(G4int argZ, G4VDataSetAlgorithm* argAlgorithm, 
				   G4double argUnitEnergies, 
				   G4double argUnitData)
  :
  z(argZ),
  algorithm(argAlgorithm),
  unitEnergies(argUnitEnergies),
  unitData(argUnitData)
{
  if (algorithm == 0) 
    G4Exception("G4ShellEMDataSet::G4ShellEMDataSet - interpolation == 0");
}


G4ShellEMDataSet::~G4ShellEMDataSet()
{
  CleanUpComponents();
 
  if (algorithm)
    delete algorithm;
}


G4double G4ShellEMDataSet::FindValue(G4double argEnergy, G4int /* argComponentId */) const
{
  // Returns the sum over the shells corresponding to e
  G4double value = 0.;

  std::vector<G4VEMDataSet *>::const_iterator i(components.begin());
  std::vector<G4VEMDataSet *>::const_iterator end(components.end());

  while (i!=end)
    {
      value+=(*i)->FindValue(argEnergy);
      i++;
    }

  return value;
}


void G4ShellEMDataSet::PrintData(void) const
{
  const size_t n(NumberOfComponents());

  G4cout << "The data set has " << n << " components" << G4endl;
  G4cout << G4endl;
 
  size_t i(0);
 
  while (i<n)
    {
      G4cout << "--- Component " << i << " ---" << G4endl;
      GetComponent(i)->PrintData();
      i++;
    }
}


void G4ShellEMDataSet :: SetEnergiesData(G4DataVector* argEnergies, 
					 G4DataVector* argData, 
					 G4int argComponentId)
{
  G4VEMDataSet * component(components[argComponentId]);
 
  if (component)
    {
      component->SetEnergiesData(argEnergies, argData, 0);
      return;
    }

  std::ostringstream message;
  message << "G4ShellEMDataSet::SetEnergiesData - component " << argComponentId << " not found";
 
  G4Exception(message.str().c_str());
}


G4bool G4ShellEMDataSet::LoadData(const G4String& argFileName)
{
  CleanUpComponents();

  G4String fullFileName(FullFileName(argFileName));
  std::ifstream in(fullFileName);

  if (!in.is_open())
    {
      G4String message("G4ShellEMDataSet::LoadData - data file \"");
      message+=fullFileName;
      message+="\" not found";
      G4Exception(message);
    }

  G4DataVector* argEnergies(0);
  G4DataVector* argData(0);

  G4double a;
  G4int shellIndex(0);
  bool energyColumn(true);

  do
    {
      in >> a;
  
      if (a == -1)
	{
	  if (energyColumn && argEnergies!=0)
	    {
	      AddComponent(new G4EMDataSet(shellIndex, argEnergies, argData, algorithm->Clone(), unitEnergies, unitData));
	      argEnergies=0;
	      argData=0;
	    }
   
	  energyColumn=(!energyColumn);
	}
      else if (a!=-2)
	{
	  if (argEnergies==0)
	    {
	      argEnergies=new G4DataVector;
	      argData=new G4DataVector;
	    }
  
	  if (energyColumn)
	    argEnergies->push_back(a*unitEnergies);
	  else
	    argData->push_back(a*unitData);

	  energyColumn=(!energyColumn);
	}
    }
  while (a != -2);

  return true;
}


G4bool G4ShellEMDataSet::SaveData(const G4String& argFileName) const
{
  G4String fullFileName(FullFileName(argFileName));
  std::ofstream out(fullFileName);

  if (!out.is_open())
    {
      G4String message("G4EMDataSet::SaveData - cannot open \"");
      message+=fullFileName;
      message+="\"";
      G4Exception(message);
    }
 
  const size_t n(NumberOfComponents());
  size_t k(0);
 
  while (k<n)
    {
      const G4VEMDataSet * component=GetComponent(k);
  
      if (component)
	{
	  const G4DataVector & energies(component->GetEnergies(0));
	  const G4DataVector & data(component->GetData(0));
 
	  G4DataVector::const_iterator i(energies.begin());
	  G4DataVector::const_iterator endI(energies.end());
	  G4DataVector::const_iterator j(data.begin());
  
	  while (i!=endI)
	    {
	      out.precision(10);
	      out.width(15);
	      out.setf(std::ofstream::left);
	      out << ((*i)/unitEnergies) << ' ';

	      out.precision(10);
	      out.width(15);
	      out.setf(std::ofstream::left);
	      out << ((*j)/unitData) << std::endl;
	      i++;
	      j++;
	    }
	}
  
      out.precision(10);
      out.width(15);
      out.setf(std::ofstream::left);
      out << -1.f << ' ';

      out.precision(10);
      out.width(15);
      out.setf(std::ofstream::left);
      out << -1.f << std::endl;
  
      k++;
    }
 
  out.precision(10);
  out.width(15);
  out.setf(std::ofstream::left);
  out << -2.f << ' ';

  out.precision(10);
  out.width(15);
  out.setf(std::ofstream::left);
  out << -2.f << std::endl;

  return true;
}





void G4ShellEMDataSet::CleanUpComponents(void)
{
  while (!components.empty())
    {
      if (components.back())
	delete components.back();

      components.pop_back();
    }
}





G4String G4ShellEMDataSet::FullFileName(const G4String & argFileName) const
{
  char* path = getenv("G4LEDATA");
  if (!path)
    G4Exception("G4ShellEMDataSet::FullFileName - G4LEDATA environment variable not set");
  
  std::ostringstream fullFileName;
 
  fullFileName << path << '/' << argFileName << z << ".dat";
                      
  return G4String(fullFileName.str().c_str());
}