/*
 * ObserverLog.hpp
 *
 *  Created on: Dec 1, 2011
 *      Author: heber
 */

#ifndef OBSERVERLOG_HPP_
#define OBSERVERLOG_HPP_

// include config.h
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <map>
#include <set>
#include <sstream>
#include <string>

#include "Observable.hpp"
#include "Observer.hpp"


/**
 * This class is used to log the working of the observer mechanism
 *
 * TODO: make this conditional dependent on compiler Flag.
 */
class ObserverLog{
  friend class Observable;
  friend class Observer;
  template <typename> friend class Cacheable;
public:
  ObserverLog();
  ~ObserverLog();
  std::string getLog();                        // get everything that has been logged
  std::string getName(void*);                  // get the name of an actor
  bool isObservable(void*);
private:
  int count;                                   // number to reference each actor in this framework
  std::map<void*,std::string> names;           // List of names assigned to actors
  std::set<void*> observables;                 // List of pointers to Observables. Needed to distinguish Observers and Observables
  void addName(void*, std::string);            // Assign a name to an Actor
  void addObservable(void*);
  void deleteName(void*);                      // delete the name of an Actor
  void deleteObservable(void*);
  std::stringstream &addMessage(int depth=0);  // Add a Message to the logging
  std::stringstream log;                       // The internal log object
};

ObserverLog &observerLog();



#endif /* OBSERVERLOG_HPP_ */