/*
 * InformationManager.h
 *
 * Copyright (C) 2008 Matthias Schiffer <matthias@gamezock.de>
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef MAD_CLIENT_INFORMATIONMANAGER_H_
#define MAD_CLIENT_INFORMATIONMANAGER_H_

#include <map>
#include <memory>

#include <Common/HostInfo.h>
#include <Common/Initializable.h>
#include <Common/Request.h>

#include <boost/thread/condition_variable.hpp>
#include <boost/thread/locks.hpp>
#include <boost/thread/mutex.hpp>

namespace Mad {
namespace Client {

class InformationManager : public Common::Initializable, private boost::noncopyable {
  private:
    class DaemonStateUpdateRequestHandler : public Common::RequestHandler {
      protected:
        virtual void handlePacket(boost::shared_ptr<const Common::XmlPacket> packet);
    };

    static InformationManager informationManager;

    boost::mutex mutex;

    boost::shared_ptr<Common::Request> updateRequest;

    std::map<std::string, Common::HostInfo> daemons;

    bool updating;

    InformationManager() : updating(false) {}

    void daemonListRequestFinished(boost::shared_ptr<const Common::XmlPacket> packet, Net::Exception error);

  protected:
    virtual void doInit();
    virtual void doDeinit();

  public:
    static InformationManager *get() {
      return &informationManager;
    }

    void updateDaemonList(Common::Connection *con);

    bool isUpdating() {
      boost::lock_guard<boost::mutex> lock(mutex);
      return updating;
    }

    void waitWhileUpdating() {
      boost::unique_lock<boost::mutex> lock(mutex);
      boost::shared_ptr<Common::Request> request = updateRequest;
      lock.unlock();

      if(request)
        request->wait();
    }


    std::map<std::string, Common::HostInfo> getDaemons() {
      boost::lock_guard<boost::mutex> lock(mutex);
      return daemons;
    }
};

}
}

#endif /* MAD_CLIENT_INFORMATIONMANAGER_H_ */