/*
 * Request.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_COMMON_REQUEST_H_
#define MAD_COMMON_REQUEST_H_

#include "export.h"

#include "RequestHandler.h"
#include <Core/Exception.h>

#include <memory>

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

namespace Mad {
namespace Common {

class MAD_COMMON_EXPORT Request : public RequestHandler {
  private:
    friend class RequestManager;

    boost::mutex mutex;
    boost::condition_variable finishCond;
    bool isFinished;

    boost::shared_ptr<const XmlData> packet;
    Core::Exception exception;

    Core::Signals::Signal2<boost::shared_ptr<const XmlData>, Core::Exception> finished;

  protected:
    Request(Application *application) : RequestHandler(application), isFinished(false), finished(application) {}

    void signalFinished(boost::shared_ptr<const XmlData> pkt, Core::Exception exp) {
      {
        boost::lock_guard<boost::mutex> lock(mutex);

        isFinished = true;
        packet = pkt;
        exception = exp;
      }

      finished.emit(pkt, exp);
      finishCond.notify_all();

      RequestHandler::signalFinished();
    }

    void signalFinished(boost::shared_ptr<const XmlData> packet) {
      signalFinished(packet, Core::Exception());
    }

    void signalFinished(Core::Exception exp) {
      signalFinished(boost::shared_ptr<const XmlData>(), exp);
    }

    void signalFinished() {
      signalFinished(boost::shared_ptr<const XmlData>(), Core::Exception());
    }

    virtual void sendRequest() = 0;
    virtual void handlePacket(boost::shared_ptr<const XmlData> packet);

  public:
    Core::Signals::Connection connectSignalFinished(const Core::Signals::Signal2<boost::shared_ptr<const XmlData>, Core::Exception>::slot_type &slot) {
      return finished.connect(slot);
    }
    void disconnectSignalFinished(const Core::Signals::Connection &con) {
      finished.disconnect(con);
    }

    void wait() {
      boost::unique_lock<boost::mutex> lock(mutex);

      while(!isFinished)
        finishCond.wait(lock);
    }

    std::pair<boost::shared_ptr<const XmlData>, Core::Exception> getResult() {
      boost::lock_guard<boost::mutex> lock(mutex);

      if(!isFinished)
        return std::make_pair(boost::shared_ptr<const XmlData>(), Core::Exception(Core::Exception::NOT_FINISHED));
      else
        return std::make_pair(packet, exception);
    }
};

}
}

#endif /* MAD_COMMON_REQUEST_H_ */