#include <stdlib.h>

#include "ACorsikaIACTEventHeader.h"

ClassImp(ACorsikaIACTEventHeader);

const Int_t ACorsikaIACTEventHeader::kMaxArrays = 20;

ACorsikaIACTEventHeader::ACorsikaIACTEventHeader(Float_t* eventHeader) {
  if (eventHeader) {
    for (Int_t i = 0; i < 273; i++) {
      fEventHeader[i] = eventHeader[i];
    }
  }
}

//_____________________________________________________________________________
ACorsikaIACTEventHeader::~ACorsikaIACTEventHeader() {}

//_____________________________________________________________________________
TDatime ACorsikaIACTEventHeader::GetDateOfBeginRun() const {
  Int_t yymmdd = (Int_t)fEventHeader[44];
  Int_t year = yymmdd / 10000;  // Y2K problem may be happened.
  Int_t month = (yymmdd - year * 10000) / 100;
  Int_t day = yymmdd - year * 10000 - month * 100;

  return TDatime(year, month, day, 0, 0, 0);
}

//_____________________________________________________________________________
Int_t ACorsikaIACTEventHeader::GetNumberOfRandomCalls(Int_t i) const {
  if (1 <= i and i <= 10) {
    return (Int_t)fEventHeader[11 + 3 * i] +
           (Int_t)fEventHeader[12 + 3 * i] * 1000000;
  } else {
    return -1;
  }
}

//_____________________________________________________________________________
Float_t ACorsikaIACTEventHeader::GetHeightOfLevel(Int_t i) const {
  if (1 <= i and i <= 10) {
    return fEventHeader[46 + i];
  } else {
    return atof("NaN");
  }
}

//_____________________________________________________________________________
Float_t ACorsikaIACTEventHeader::GetXCoordinateOfCoreLocationForScatteredEvent(
    Int_t i) const {
  if (1 <= i and i <= kMaxArrays) {
    return fEventHeader[97 + i];
  } else {
    return atof("NaN");
  }
}

//_____________________________________________________________________________
Float_t ACorsikaIACTEventHeader::GetYCoordinateOfCoreLocationForScatteredEvent(
    Int_t i) const {
  if (1 <= i and i <= kMaxArrays) {
    return fEventHeader[117 + i];
  } else {
    return atof("NaN");
  }
}

//_____________________________________________________________________________
Double_t ACorsikaIACTEventHeader::GetXOffset(Int_t i) const {
  if (1 <= i and i <= kMaxArrays) {
    return fXOffset[i - 1];
  } else {
    return atof("NaN");
  }
}

//_____________________________________________________________________________
Double_t ACorsikaIACTEventHeader::GetYOffset(Int_t i) const {
  if (1 <= i and i <= kMaxArrays) {
    return fYOffset[i - 1];
  } else {
    return atof("NaN");
  }
}

//_____________________________________________________________________________
void ACorsikaIACTEventHeader::SetMultipleUseHeader(Int_t numberOfArrays,
                                                   Double_t timeOffset,
                                                   Double_t* xOffset,
                                                   Double_t* yOffset) {
  fNumberOfArrays = numberOfArrays;
  fTimeOffset = timeOffset;

  for (Int_t i = 0; i < fNumberOfArrays; i++) {
    fXOffset[i] = xOffset[i];
    fYOffset[i] = yOffset[i];
  }
}