//
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//
#include "G4FissionStore.hh"
#include <cmath>

G4FissionStore::G4FissionStore()
  : verboseLevel(0){

  if (verboseLevel > 3) {
    G4cout << " >>> G4FissionStore::G4FissionStore" << G4endl;
  }
}

G4FissionConfiguration G4FissionStore::generateConfiguration(G4double amax, 
							     G4double rand) const {

  if (verboseLevel > 3) {
    G4cout << " >>> G4FissionStore::generateConfiguration" << G4endl;
  }
  
  const G4double small = -30.0;

  G4double totProb = 0.0;
  std::vector<G4double> probs(configurations.size());

// G4cout << " amax " << amax << " ic " << configurations.size() << G4endl;

  for (G4int i = 0; i < G4int(configurations.size()); i++) {
    G4double ez = configurations[i].ezet;
    G4double pr = ez - amax;

    if (pr < small) pr = small;
    pr = std::exp(pr); 
    //  configurations[i].print();
    //  G4cout << " probability " << pr << G4endl; 
    totProb += pr;
    probs[i] = totProb;  
  };

  G4double st = totProb * rand;
  G4int igen = 0;

  while (probs[igen] <= st && igen < G4int(configurations.size())) igen++;

// G4cout << " igen " << igen << G4endl;

  return configurations[igen];
}