/* 

Copyright (c) 2007-2012, The Regents of the University of California. 
Produced at the Lawrence Livermore National Laboratory 
UCRL-CODE-227323. 
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Please also read this http://nuclear.llnl.gov/simulations/additional_bsd.html
 
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*/


#include "CRYSetup.h"
#include "CRYData.h"
#include <sstream>
#include <iostream>
#include <assert.h>
#include <stdlib.h>  // For Ubuntu Linux

CRYSetup::CRYSetup(std::string configData, std::string dataDir) {

  _utils=new CRYUtils;

  //read the data!
  //int nAlt=3;
  // GlueX == we only use altitude = 0 data
  int nAlt=1;
  int altitudes[3];
  altitudes[0]=0;
  altitudes[1]=2100;
  altitudes[2]=11300;

  for (int i=0; i < nAlt; i++) {
    std::ostringstream fileName;
    fileName << dataDir << "/cosmics_" << altitudes[i] << ".data";
    CRYData *data=new CRYData(fileName.str());
    _data[altitudes[i]]=data;
  }
  //data->print(std::cout);


  //param names
  _parmNames[CRYSetup::returnNeutrons]="returnNeutrons";
  _parmNames[CRYSetup::returnProtons]="returnProtons";
  _parmNames[CRYSetup::returnGammas]="returnGammas";
  _parmNames[CRYSetup::returnElectrons]="returnElectrons";
  _parmNames[CRYSetup::returnMuons]="returnMuons";
  _parmNames[CRYSetup::returnPions]="returnPions";
  _parmNames[CRYSetup::returnKaons]="returnKaons";
  _parmNames[CRYSetup::subboxLength]="subboxLength";
  _parmNames[CRYSetup::altitude]="altitude";
  _parmNames[CRYSetup::latitude]="latitude";
  _parmNames[CRYSetup::date]="date";
  _parmNames[CRYSetup::nParticlesMin]="nParticlesMin";
  _parmNames[CRYSetup::nParticlesMax]="nParticlesMax";
  _parmNames[CRYSetup::xoffset]="xoffset";
  _parmNames[CRYSetup::yoffset]="yoffset";
  _parmNames[CRYSetup::zoffset]="zoffset";


  // set some defaults
  _parms[CRYSetup::returnNeutrons]=1.0;
  _parms[CRYSetup::returnProtons]=1.0;
  _parms[CRYSetup::returnGammas]=1.0;
  _parms[CRYSetup::returnElectrons]=1.0;
  _parms[CRYSetup::returnMuons]=1.0;
  _parms[CRYSetup::returnPions]=1.0;
  _parms[CRYSetup::returnKaons]=1.0;
  _parms[CRYSetup::subboxLength]=100000000.0;
  _parms[CRYSetup::altitude]=0.;
  _parms[CRYSetup::latitude]=0.;
  std::string def_date = "1-1-2007";
  _parms[CRYSetup::date]=parseDate(def_date.c_str());
  _parms[CRYSetup::nParticlesMin]=1;
  _parms[CRYSetup::nParticlesMax]=1000000;
  _parms[CRYSetup::xoffset]=0.;
  _parms[CRYSetup::yoffset]=0.;
  _parms[CRYSetup::zoffset]=0.;

  
  //ok - just split by whitespace into tokens...

  std::istringstream iss(configData);

  while ( !iss.eof()) { 
    std::string key="";
    std::string value="";
    
    //....find next keyword (single string delimited by a space)
    while (key==""   && !iss.eof() ) std::getline(iss,key,' ');

    //....find next value (single string delimited by a space)
    while (value=="" && !iss.eof() ) std::getline(iss,value,' ');

    if (value != "" ) {

      bool foundParm=false;
      
      for ( CRYSetup::CRYParms i=CRYSetup::parmMin; i<=CRYSetup::parmMax; i=CRYSetup::CRYParms(i+1)) {
        if ( key == _parmNames[i] ) {
          _parms[i]=atof(value.c_str());
          foundParm=true;
          std::cout << "CRY::CRYSetup: Setting " << _parmNames[i] << " to ";
          if( key == _parmNames[CRYSetup::date]) {
            _parms[i] = parseDate(value.c_str());
            std::cout << value << " (month-day-year)" << std::endl;
      }
      else {
        std::cout << _parms[i] << std::endl;
      }
        }
      }
      if ( !foundParm) {
        std::cerr << "CRY::CRYSetup: Found unknown parameter " 
                  << key << std::endl;
        std::cerr << "in configuration setup\n";
        assert(0);
      }


    }
  }

}


double CRYSetup::parseDate(std::string date) {
  //  date is in the form month-day-year
  //
  //....Parse a date string and convert to a decimal number representing
  //    the year and a fraction of the year
  //  parseDate returns  year + (nbr_days / nbr_days_in_year)
  //      where: nbr_days = the number of days between the date and Jan 1
  //          e.g.  Date      nbr_days
  //               1 Jan             0
  //              31 Jan            30
  //               1 Feb            31
  //               1 Mar            59
  //                 ...           ...
  //              31 Dec           364 (For a non leap year)
  //
  std::istringstream issdate(date);

  std::string text;
  std::getline(issdate,text,'-');
  int mm = atoi(text.c_str());
  
  std::getline(issdate,text,'-');
  int dd = atoi(text.c_str());
  
  std::getline(issdate,text,'-');
  double year = atof(text.c_str());
  int yy = atoi(text.c_str());
  
  bool gooddate = true;
  
  // initialize nbr of days in each month (first element is a dummy)
  //                     dummy, jan, feb, mar, apr, may, jun,
  int nbr_days_in_mo[13] = { 0,  31,  28,  31,  30,  31,  30,
                                 31,  31,  30,  31,  30,  31 };
  //                            jul, aug, sep, oct, nov, dec
  
  double nbr_days_in_year = 365.0;
  
  if(isLeapYear(yy)) {
    nbr_days_in_mo[2]  = 29;
    nbr_days_in_year = 366.0;
  }
  else {
    nbr_days_in_mo[2]  = 28;
  }

  // Verify the date is valid
  if ((mm < 1) || (mm > 12))
     gooddate = false;
  else if((dd < 1) || (dd > nbr_days_in_mo[mm]))
     gooddate = false;
  if(!gooddate) {
          std::cerr << "CRY::CRYSetup: The date " << date 
                  << " is invalid.  The format is m-d-y" << std::endl;
        assert(0);
  }
  
  // The date is valid, continue
  
  // Create  an array of the cumulative number of days in previous months
    int cum_days[13];
    cum_days[0] = 0;
    for (int i = 1; i < 13; i++) {
      cum_days[i] = cum_days[i - 1] + nbr_days_in_mo[i - 1];
    }
   
  
  // Return  year + (nbr_days / days_in_year)
  int nbr_days = dd - 1 + cum_days[mm];
  return year + (static_cast <double>(nbr_days) / nbr_days_in_year);
}

//
//.... Determine if a year is a leap year
//
bool CRYSetup::isLeapYear(int yr)
// Returns true if yr is a leap year, false if it is not
{
bool leapyear = false;
if(yr % 400 == 0) 
  leapyear = true;
  else if((yr % 4 == 0) && (yr % 100 != 0))
    leapyear = true;
return leapyear;
}