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// $Id: G4NuclearLevelManager.cc,v 1.14 2010/11/17 16:50:53 vnivanch Exp $
// GEANT4 tag $Name: geant4-09-04-ref-00 $
//
// -------------------------------------------------------------------
//      GEANT 4 class file 
//
//      CERN, Geneva, Switzerland
//
//      File name:     G4NuclearLevelManager
//
//      Author:        Maria Grazia Pia (pia@genova.infn.it)
// 
//      Creation date: 24 October 1998
//
//      Modifications: 
//      
//        15 April 1999, Alessandro Brunengo (Alessandro.Brunengo@ge.infn.it)
//              Added half-life, angular momentum, parity, emissioni type
//              reading from experimental data. 
//        02 May 2003,   Vladimir Ivanchenko remove rublic copy constructor
//        06 Oct 2010, M. Kelsey -- Use object storage, not pointers, drop
//		public access to list, simplify list construction
// -------------------------------------------------------------------

#include "G4NuclearLevelManager.hh"

#include "globals.hh"
#include "G4NuclearLevel.hh"
#include "G4ios.hh"
#include "G4HadronicException.hh"
#include <stdlib.h>
#include <fstream>
#include <sstream>
#include <algorithm>
#include "G4HadTmpUtil.hh"

G4NuclearLevelManager::G4NuclearLevelManager():
    _nucleusA(0), _nucleusZ(0), _fileName(""), _validity(false), 
    _levels(0), _levelEnergy(0), _gammaEnergy(0), _probability(0)
{ }

G4NuclearLevelManager::G4NuclearLevelManager(G4int Z, G4int A, const G4String& filename) :
    _nucleusA(A), _nucleusZ(Z), _fileName(filename), _validity(false), 
    _levels(0), _levelEnergy(0), _gammaEnergy(0), _probability(0)
{ 
    if (A <= 0 || Z <= 0 || Z > A )
	throw G4HadronicException(__FILE__, __LINE__, "==== G4NuclearLevelManager ==== (Z,A) <0, or Z>A");

    MakeLevels();
}

G4NuclearLevelManager::~G4NuclearLevelManager()
{
  ClearLevels();
}

void G4NuclearLevelManager::SetNucleus(G4int Z, G4int A, const G4String& filename)
{
  if (A <= 0 || Z <= 0 || Z > A )
    throw G4HadronicException(__FILE__, __LINE__, "==== G4NuclearLevelManager ==== (Z,A) <0, or Z>A");

  if (_nucleusZ != Z || _nucleusA != A)
    {
      _nucleusA = A;
      _nucleusZ = Z;
      _fileName = filename;
      MakeLevels();
    }
}

const G4NuclearLevel* G4NuclearLevelManager::GetLevel(G4int i) const {
  return (i>=0 && i<NumberOfLevels()) ? (*_levels)[i] : 0;
}


const G4NuclearLevel* 
G4NuclearLevelManager::NearestLevel(G4double energy, 
				    G4double eDiffMax) const 
{
  if (NumberOfLevels() <= 0) return 0;

  G4int iNear = -1;
  
  G4double diff = 9999. * GeV;
  for (unsigned int i=0; i<_levels->size(); i++)
    {
      G4double e = GetLevel(i)->Energy();
      G4double eDiff = std::abs(e - energy);
      if (eDiff < diff && eDiff <= eDiffMax)
	{ 
	  diff = eDiff; 
	  iNear = i;
	}
    }
  
  return GetLevel(iNear);	// Includes range checking on iNear
}


G4double G4NuclearLevelManager::MinLevelEnergy() const
{
  return (NumberOfLevels() > 0) ? _levels->front()->Energy() : 9999.*GeV;
}


G4double G4NuclearLevelManager::MaxLevelEnergy() const
{
  return (NumberOfLevels() > 0) ? _levels->back()->Energy() : 0.*GeV;
}


const G4NuclearLevel* G4NuclearLevelManager::HighestLevel() const
{
  return (NumberOfLevels() > 0) ? _levels->front() : 0;
}


const G4NuclearLevel* G4NuclearLevelManager::LowestLevel() const
{
  return (NumberOfLevels() > 0) ? _levels->back() : 0;
}


G4bool G4NuclearLevelManager::Read(std::ifstream& dataFile) 
{
  G4bool goodRead = ReadDataLine(dataFile);
  
  if (goodRead) ProcessDataLine();
  return goodRead;
}

// NOTE:  Standard stream I/O generates a 45 byte std::string per item!

G4bool G4NuclearLevelManager::ReadDataLine(std::ifstream& dataFile) {
  /***** DO NOT USE REGULAR STREAM I/O
  G4bool result = true;
  if (dataFile >> _levelEnergy)
    {
      dataFile >> _gammaEnergy >> _probability >> _polarity >> _halfLife
	       >> _angularMomentum  >> _totalCC >> _kCC >> _l1CC >> _l2CC 
	       >> _l3CC >> _m1CC >> _m2CC >> _m3CC >> _m4CC >> _m5CC
	       >> _nPlusCC;
    }
  else result = false;
  *****/

  // Each item will return iostream status
  return (ReadDataItem(dataFile, _levelEnergy) &&
	  ReadDataItem(dataFile, _gammaEnergy) &&
	  ReadDataItem(dataFile, _probability) &&
	  ReadDataItem(dataFile, _polarity) &&
	  ReadDataItem(dataFile, _halfLife) &&
	  ReadDataItem(dataFile, _angularMomentum) &&
	  ReadDataItem(dataFile, _totalCC) &&
	  ReadDataItem(dataFile, _kCC) &&
	  ReadDataItem(dataFile, _l1CC) &&
	  ReadDataItem(dataFile, _l2CC) &&
	  ReadDataItem(dataFile, _l3CC) &&
	  ReadDataItem(dataFile, _m1CC) &&
	  ReadDataItem(dataFile, _m2CC) &&
	  ReadDataItem(dataFile, _m3CC) &&
	  ReadDataItem(dataFile, _m4CC) &&
	  ReadDataItem(dataFile, _m5CC) &&
	  ReadDataItem(dataFile, _nPlusCC) );
}

G4bool 
G4NuclearLevelManager::ReadDataItem(std::istream& dataFile, G4double& x) 
{
  G4bool okay = (dataFile >> buffer);		// Get next token
  if (okay) x = strtod(buffer, NULL);

  return okay;
}

void G4NuclearLevelManager::ProcessDataLine() 
{
  const G4double minProbability = 1e-8;
  
  // Assign units for dimensional quantities
  _levelEnergy *= keV;
  _gammaEnergy *= keV;
  _halfLife *= second;
  
  // The following adjustment is needed to take care of anomalies in 
  // data files, where some transitions show up with relative probability
  // zero
  if (_probability < minProbability) _probability = minProbability;
  // the folowwing is to convert icc probability to accumulative ones
  _l1CC += _kCC;
  _l2CC += _l1CC;
  _l3CC += _l2CC;
  _m1CC += _l3CC;
  _m2CC += _m1CC;
  _m3CC += _m2CC;
  _m4CC += _m3CC;
  _m5CC += _m4CC;
  _nPlusCC += _m5CC;

  if (_nPlusCC!=0) {	// Normalize to probabilities
    _kCC /= _nPlusCC;
    _l1CC /= _nPlusCC;
    _l2CC /= _nPlusCC;
    _l3CC /= _nPlusCC;
    _m1CC /= _nPlusCC;
    _m2CC /= _nPlusCC;
    _m3CC /= _nPlusCC;
    _m4CC /= _nPlusCC;
    _m5CC /= _nPlusCC;
    _nPlusCC /= _nPlusCC;  
  } else {		// Total was zero, reset to unity
    _kCC = 1;
    _l1CC = 1;
    _l2CC = 1;
    _l3CC = 1;
    _m1CC = 1;
    _m2CC = 1;
    _m3CC = 1;
    _m4CC = 1;
    _m5CC = 1;
    _nPlusCC = 1;
  }
	
  // G4cout << "Read " << _levelEnergy << " " << _gammaEnergy << " " << _probability << G4endl;
}


void G4NuclearLevelManager::ClearLevels()
{
  _validity = false;

  if (NumberOfLevels() > 0) {
    std::for_each(_levels->begin(), _levels->end(), DeleteLevel());
    _levels->clear();
  }

  delete _levels;
  _levels = 0;
}

void G4NuclearLevelManager::MakeLevels()
{
  _validity = false;
  if (NumberOfLevels() > 0) ClearLevels();	// Discard existing data

  std::ifstream inFile(_fileName, std::ios::in);
  if (! inFile) 
    {
#ifdef GAMMAFILEWARNING
      if (_nucleusZ > 10) G4cout << " G4NuclearLevelManager: nuclide (" 
                                 << _nucleusZ << "," << _nucleusA 
                                 << ") does not have a gamma levels file" << G4endl;
#endif
      return;
    }

  _levels = new G4PtrLevelVector;

  // Read individual gamma data and fill levels for this nucleus
 
  G4NuclearLevel* thisLevel = 0;
  G4int nData = 0;

  while (Read(inFile)) {
    thisLevel = UseLevelOrMakeNew(thisLevel);	// May create new pointer
    AddDataToLevel(thisLevel);
    nData++;					// For debugging purposes
  }

  FinishLevel(thisLevel);		// Final  must be completed by hand
  
  // ---- MGP ---- Don't forget to close the file 
  inFile.close();
	
  //  G4cout << " ==== MakeLevels ===== " << nData << " data read " << G4endl;

  G4PtrSort<G4NuclearLevel>(_levels);
  
  _validity = true;
  
  return;
}

G4NuclearLevel* 
G4NuclearLevelManager::UseLevelOrMakeNew(G4NuclearLevel* level) 
{
  if (level && _levelEnergy == level->Energy()) return level;	// No change

  if (level) FinishLevel(level);	// Save what we have up to now

  //  G4cout << "Making a new level... " << _levelEnergy << G4endl;
  return new G4NuclearLevel(_levelEnergy, _halfLife, _angularMomentum);
}

void G4NuclearLevelManager::AddDataToLevel(G4NuclearLevel* level) 
{
  if (!level) return;		// Sanity check

  level->_energies.push_back(_gammaEnergy);
  level->_weights.push_back(_probability);
  level->_polarities.push_back(_polarity);
  level->_kCC.push_back(_kCC);
  level->_l1CC.push_back(_l1CC);
  level->_l2CC.push_back(_l2CC);
  level->_l3CC.push_back(_l3CC);
  level->_m1CC.push_back(_m1CC);
  level->_m2CC.push_back(_m2CC);
  level->_m3CC.push_back(_m3CC);
  level->_m4CC.push_back(_m4CC);
  level->_m5CC.push_back(_m5CC);
  level->_nPlusCC.push_back(_nPlusCC);
  level->_totalCC.push_back(_totalCC);
}

void G4NuclearLevelManager::FinishLevel(G4NuclearLevel* level) 
{
  if (!level || !_levels) return;		// Sanity check

  level->Finalize();
  _levels->push_back(level);
}


void G4NuclearLevelManager::PrintAll()
{
  G4int nLevels = NumberOfLevels();
    
  G4cout << " ==== G4NuclearLevelManager ==== (" << _nucleusZ << ", " << _nucleusA
	 << ") has " << nLevels << " levels" << G4endl
	 << "Highest level is at energy " << MaxLevelEnergy() << " MeV "
	 << G4endl << "Lowest level is at energy " << MinLevelEnergy()
	 << " MeV " << G4endl;
    
  for (G4int i=0; i<nLevels; i++)
    GetLevel(i)->PrintAll();
}

G4NuclearLevelManager::G4NuclearLevelManager(const G4NuclearLevelManager &right)
{
    _levelEnergy = right._levelEnergy;
    _gammaEnergy = right._gammaEnergy;
    _probability = right._probability;
    _polarity = right._polarity;
    _halfLife = right._halfLife;
    _angularMomentum = right._angularMomentum;
    _kCC = right._kCC;
    _l1CC = right._l1CC;
    _l2CC = right._l2CC;
    _l3CC = right._l3CC;
    _m1CC = right._m1CC;
    _m2CC = right._m2CC;
    _m3CC = right._m3CC;
    _m4CC = right._m4CC;
    _m5CC = right._m5CC;
    _nPlusCC = right._nPlusCC;
    _totalCC = right._totalCC;
    _nucleusA = right._nucleusA;
    _nucleusZ = right._nucleusZ;
    _fileName = right._fileName;
    _validity = right._validity;

    if (right._levels != 0)   
      {
	_levels = new G4PtrLevelVector;
	G4int n = right._levels->size();
	G4int i;
	for (i=0; i<n; i++)
	  {
	    _levels->push_back(new G4NuclearLevel(*(right.GetLevel(i))));
	  }
	
	G4PtrSort<G4NuclearLevel>(_levels);
      }
    else 
      {
	_levels = 0;
      }
}

