#include <string>
#include <iostream>
#include <iomanip>

#include "TError.h"
#include "TROOT.h"
#include "TFile.h"

#include "km3net-dataformat/offline/Head.hh"
#include "km3net-dataformat/offline/Evt.hh"

#include "JDAQ/JDAQEventIO.hh"
#include "JDAQ/JDAQTimesliceIO.hh"
#include "JDAQ/JDAQSummarysliceIO.hh"

#include "JTrigger/JTriggerParameters.hh"

#include "antares-dataformat/TimeSlice.hh"
#include "antares-dataformat/PhysicsEvent.hh"

#include "JROOT/JTreeParameters.hh"
#include "JROOT/JChainReader.hh"
#include "JSupport/JSupport.hh"

#include "JLang/JBool.hh"
#include "JLang/JType.hh"

#include "Jeep/JParser.hh"
#include "Jeep/JMessage.hh"


namespace {
  
  using namespace JPP;

  
  /**
   * Auxiliary class to build list of valid TreeReader pointers.
   */
  class JChainList :
    public std::vector<TChain*>
  {
  public:
    /**
     * Constructor.
     *
     * \param  typelist   type list
     */
    template<class T>
    JChainList(JType<T> typelist) 
    {
      for_each(*this, typelist);
    }

  
    /**
     * Addition of class.
     *
     * \param  type       type
     */
    template<class T>
    void operator()(JType<T> type)
    {
      add(type, JBool<JTreeParametersAvailable<T>::result>());
    }
  
  private:
    /**
     * Addition of TChain compatible class.
     */
    template<class T>
    void add(JType<T>, JBool<true>)
    {
      this->push_back(new JChainReader<T>(getTreeParameters(JType<T>())));
    }
  
  
    /**
     * No addition of TChain incompatible class.
     */
    template<class T>
    void add(JType<T>, JBool<false>)
    {}
  };
}


/**
 * \file
 *
 * Auxiliary program to print ROOT TChain information.
 * \author mdejong
 */
int main(int argc, char **argv)
{
  using namespace std;
  using namespace JPP;

  typedef JAppend<JAllTypes_t, JAntaresTypes_t>::typelist typelist;

  vector<string>     inputFile;
  int                debug;

  try { 

    JParser<> zap("Auxiliary program to print ROOT TChain information.");
    
    zap['f'] = make_field(inputFile);
    zap['d'] = make_field(debug)           = 1;

    zap(argc, argv);
  }
  catch(const exception &error) {
    FATAL(error.what() << endl);
  }


  JType<typelist> type;

  JChainList inspector(type);

  for (JChainList::iterator i = inspector.begin(); i != inspector.end(); ++i) {
    for (vector<string>::const_iterator file = inputFile.begin(); file != inputFile.end(); ++file) {
      (*i)->Add(file->c_str());
    }
  }

  DEBUG("Number of files " << inputFile.size() << endl); 

  gErrorIgnoreLevel = kFatal;
  
  for (JChainList::iterator i = inspector.begin(); i != inspector.end(); ++i) {
    cout << setw(24) << left  <<  (*i)->GetName()    << ' ' 
	 << setw(10) << right <<  (*i)->GetEntries() << endl;
  }
}