/*
 * 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 Lesser 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser 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 "export.h"

#include <map>
#include <memory>

#include <Common/HostInfo.h>
#include <Common/Request.h>
#include <Common/RequestHandlerGroup.h>
#include <Common/RequestHandlers/SimpleRequestHandler.h>

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

namespace Mad {
namespace Client {

class Application;

class MAD_CLIENT_EXPORT InformationManager : private boost::noncopyable {
  private:
    class MAD_CLIENT_EXPORT DaemonStateUpdateRequestHandler : public Common::RequestHandlers::SimpleRequestHandler {
      private:
        void handleRequest(boost::shared_ptr<const Common::XmlData> packet, Common::XmlData *ret);

      public:
        DaemonStateUpdateRequestHandler(Common::Application *application)
        : Common::RequestHandlers::SimpleRequestHandler(application, "UpdateHostState",
            boost::bind(&DaemonStateUpdateRequestHandler::handleRequest, this, _1, _2)) {}
    };

    friend class Application;

    Application *application;

    boost::mutex mutex;

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

    std::map<Core::String, Common::HostInfo> daemons;

    bool updating;

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

    InformationManager(Application *application0);
    ~InformationManager();

  public:
    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<Core::String, Common::HostInfo> getDaemons() {
      boost::lock_guard<boost::mutex> lock(mutex);
      return daemons;
    }
};

}
}

#endif /* MAD_CLIENT_INFORMATIONMANAGER_H_ */