// -*- C++ -*-
//
// Package:     Core
// Class  :     FWModelExpressionSelector
//
// Implementation:
//     <Notes on implementation>
//
// Original Author:  Chris Jones
//         Created:  Wed Jan 23 10:37:22 EST 2008
//

// system include files
#include <sstream>
#include "TClass.h"
#include "FWCore/Reflection/interface/ObjectWithDict.h"
#include "FWCore/Reflection/interface/TypeWithDict.h"

#include "CommonTools/Utils/interface/Grammar.h"
#include "CommonTools/Utils/interface/Exception.h"

// user include files
#include "Fireworks/Core/interface/FWModelExpressionSelector.h"
#include "Fireworks/Core/interface/FWEventItem.h"
#include "Fireworks/Core/interface/FWModelChangeManager.h"
#include "Fireworks/Core/interface/FWExpressionException.h"
#include "Fireworks/Core/src/expressionFormatHelpers.h"
//
// constants, enums and typedefs
//

//
// static data member definitions
//

//
// constructors and destructor
//
/*
   FWModelExpressionSelector::FWModelExpressionSelector()
   {
   }
 */
// FWModelExpressionSelector::FWModelExpressionSelector(const FWModelExpressionSelector& rhs)
// {
//    // do actual copying here;
// }

/*FWModelExpressionSelector::~FWModelExpressionSelector()
   {
   }
 */
//
// assignment operators
//
// const FWModelExpressionSelector& FWModelExpressionSelector::operator=(const FWModelExpressionSelector& rhs)
// {
//   //An exception safe implementation is
//   FWModelExpressionSelector temp(rhs);
//   swap(rhs);
//
//   return *this;
// }

//
// member functions
//

//
// const member functions
//
void FWModelExpressionSelector::select(FWEventItem* iItem, const std::string& iExpression, Color_t iColor) const {
  using namespace fireworks::expression;

  edm::TypeWithDict type(edm::TypeWithDict::byName(iItem->modelType()->GetName()));
  assert(type != edm::TypeWithDict());

  //Backwards compatibility with old format
  std::string temp = oldToNewFormat(iExpression);

  //now setup the parser
  using namespace boost::spirit::classic;
  reco::parser::SelectorPtr selectorPtr;
  reco::parser::Grammar grammar(selectorPtr, type);
  try {
    if (!parse(temp.c_str(), grammar.use_parser<0>() >> end_p, space_p).full) {
      throw FWExpressionException("syntax error", -1);
      //std::cout <<"failed to parse "<<iExpression<<" because of syntax error"<<std::endl;
    }
  } catch (const reco::parser::BaseException& e) {
    //NOTE: need to calculate actual position before doing the regex
    throw FWExpressionException(reco::parser::baseExceptionWhat(e),
                                indexFromNewFormatToOldFormat(temp, e.where - temp.c_str(), iExpression));
    //std::cout <<"failed to parse "<<iExpression<<" because "<<reco::parser::baseExceptionWhat(e)<<std::endl;
  }

  FWChangeSentry sentry(*(iItem->changeManager()));
  for (unsigned int index = 0; index < iItem->size(); ++index) {
    edm::ObjectWithDict o(type, const_cast<void*>(iItem->modelData(index)));
    if ((*selectorPtr)(o)) {
      iItem->select(index);
      if (iColor > 0) {
        FWDisplayProperties props = iItem->modelInfo(index).displayProperties();
        props.setColor(iColor);
        iItem->setDisplayProperties(index, props);
      }
    }
  }
}

//
// static member functions
//
