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

#include "TROOT.h"
#include "TFile.h"
#include "TNamed.h"
#include "TKey.h"
#include "TRegexp.h"

#include "JLang/JLangToolkit.hh"
#include "JLang/JObjectMultiplexer.hh"
#include "Jeep/JeepToolkit.hh"
#include "JSon/JSon.hh"

#include "JSupport/JMultipleFileScanner.hh"
#include "JSupport/JMeta.hh"
#include "JSupport/JSupport.hh"

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

namespace {

  /**
   * Print options.
   */
  static const char* plain_t   =  "plain";       //!< plain text
  static const char* json_t    =  "JSON";        //!< JSON format
}

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

  string         inputFile;
  JLimit_t       numberOfEvents;
  string         application;
  string         option;
  vector<string> key;
  int            debug;

  try { 

    JParser<> zap("Auxiliary program to print Jpp meta data.");
    
    zap['f'] = make_field(inputFile);
    zap['n'] = make_field(numberOfEvents)  = JLimit::max();
    zap['A'] = make_field(application)     = "";
    zap['O'] = make_field(option)          = plain_t, json_t;
    zap['k'] = make_field(key, "possible values: " 
			  << GITrelease_t  << ", " 
			  << SVNrelease_t  << ", "
			  << ROOTrelease_t << ", "
			  << namespace_t   << ", "
			  << command_t     << ", "
			  << system_t)     = JPARSER::initialised();
    zap['d'] = make_field(debug)           = 1;

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

  if (application != "") {

    TFile* in = TFile::Open(inputFile.c_str(), "exists");

    if (in != NULL && in->IsOpen()) {

      const TRegexp regexp(application.c_str());

      TIter iter(in->GetListOfKeys());
      
      for (TKey* key; (key = (TKey*) iter.Next()) != NULL; ) {
	
	const TString tag(key->GetName());
	
	if (tag.Contains(regexp)) {
	  
	  TNamed* named = dynamic_cast<TNamed*>(key->ReadObj());
	  
	  if (named != NULL) {
	    cout << named->GetName() << "[" << key->GetCycle() << "] " << named->GetTitle() << endl;
	  }
	}
      }
      
      in->Close();
      
    } else {

      ERROR("Error opening file: " << inputFile << endl);
    }

  } else {

    JMultipleFileScanner<JMetaTypes_t> in(inputFile, numberOfEvents);
    JObjectMultiplexer  <JMetaTypes_t> abc(in);

    json js;

    while (abc.hasNext()) {

      JMeta* meta = abc.next();

      if        (option == plain_t) {

	if (key.empty()) {

	  cout << (*meta) << endl;

	} else {

	  for (const auto& i : key) {
	    cout << ' ' << (*meta)[i];
	  }
	  cout << endl;
	}

      } else if (option == json_t) {

	js += json(*meta);
      }
    }

    if (option == json_t) {
      cout << setw(4) << js << endl;
    }
  }
}