/*
 * 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 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_COMMON_XMLREQUEST_H_
#define MAD_COMMON_XMLREQUEST_H_

#include "RequestHandler.h"
#include <Net/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 Request : public RequestHandler {
  private:
    friend class RequestManager;

    Net::Signals::Signal1<Request&> finished;

    std::auto_ptr<XmlPacket> res;
    Net::Exception exp;

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

    static void doNothing(Request&) {}

  public:
    typedef Net::Signals::Signal1<Request&>::slot_type slot_type;

  protected:
    static slot_type empty_slot;

    Request(Connection *connection, uint16_t requestId, slot_type slot)
    : RequestHandler(connection, requestId), exp(Net::Exception::NOT_FINISHED), isFinished(false) {
      finished.connect(slot);
      finished.connect(boost::bind(&Request::signalFinished, this));
    }

    virtual ~Request() {
      wait();
    }

    void finish(std::auto_ptr<XmlPacket> result) {
      {
        boost::lock_guard<boost::mutex> lock(mutex);

        res = result;
        isFinished = true;
      }

      finishCond.notify_all();
      finished.emit(*this);
    }

    void finish(const XmlPacket& result) {
      {
        boost::lock_guard<boost::mutex> lock(mutex);

        res.reset(new XmlPacket(result));
        isFinished = true;
      }

      finishCond.notify_all();
      finished.emit(*this);
    }

    void finishWithError(const Net::Exception &e) {
      {
        boost::lock_guard<boost::mutex> lock(mutex);

        exp = e;
        isFinished = true;
      }

      finishCond.notify_all();
      finished.emit(*this);
    }

    virtual void sendRequest() = 0;
    virtual void handlePacket(const XmlPacket &packet);

  public:
    const XmlPacket& getResult() throw(Net::Exception) {
      boost::lock_guard<boost::mutex> lock(mutex);

      if(res.get())
        return *res;

      throw exp;
    }

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

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

}
}

#endif /* MAD_COMMON_XMLREQUEST_H_ */