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#ifndef ACTIONLIB_ACTION_CONNECTION_MONITOR_H_
#define ACTIONLIB_ACTION_CONNECTION_MONITOR_H_

#include <boost/thread/condition.hpp>
#include <boost/thread/recursive_mutex.hpp>

#include <ros/ros.h>
#include <actionlib_msgs/GoalStatusArray.h>
#include <set>
#include <map>

namespace actionlib
{

class ConnectionMonitor
{
public:
  ConnectionMonitor(ros::Subscriber&feedback_sub, ros::Subscriber& result_sub);

  void goalConnectCallback(const ros::SingleSubscriberPublisher& pub);

  void goalDisconnectCallback(const ros::SingleSubscriberPublisher& pub);

  void cancelConnectCallback(const ros::SingleSubscriberPublisher& pub);

  void cancelDisconnectCallback(const ros::SingleSubscriberPublisher& pub);

  void processStatus(const actionlib_msgs::GoalStatusArrayConstPtr& status);

  bool waitForActionServerToStart(const ros::Duration& timeout = ros::Duration(0,0), const ros::NodeHandle& nh = ros::NodeHandle() );
  bool isServerConnected();

private:

  // status stuff
  std::string status_caller_id_;
  bool status_received_;
  ros::Time latest_status_time_;

  boost::condition check_connection_condition_;

  boost::recursive_mutex data_mutex_;
  std::set<std::string> goalSubscribers_;
  std::set<std::string> cancelSubscribers_;

  std::string goalSubscribersString();
  std::string cancelSubscribersString();

  ros::Subscriber& feedback_sub_;
  ros::Subscriber& result_sub_;
};

}

#endif
