/*
 * RequestManager.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_REQUESTMANAGER_H_
#define MAD_COMMON_REQUESTMANAGER_H_

#include "Initializable.h"
#include <Net/Connection.h>

#include <map>
#include <memory>

namespace Mad {
namespace Common {

class RequestBase;
class RequestHandler;

class RequestManager : public Initializable {
  private:
    class RequestMap : private std::map<uint16_t,RequestHandler*> {
      private:
        // Prevent shallow copy
        RequestMap(const RequestMap &o);
        RequestMap& operator=(const RequestMap &o);

      public:
        RequestMap() {}
        ~RequestMap();

        bool addRequest(uint16_t id, RequestHandler *info);
        RequestHandler* findRequest(uint16_t id);
        bool deleteRequest(uint16_t id);
    };

    class RequestHandlerFactory {
      protected:
        RequestHandlerFactory() {}

      public:
        virtual RequestHandler* createRequestHandler() = 0;
        virtual ~RequestHandlerFactory() {}
    };

    template<class T> class SpecificRequestHandlerFactory : public RequestHandlerFactory {
      public:
        virtual RequestHandler* createRequestHandler() {
          return new T();
        }
    };

    static RequestManager requestManager;

    std::map<Net::Connection*,RequestMap*> requestMaps;
    bool core;
    uint16_t requestId;

    std::map<Net::Packet::Type,RequestHandlerFactory*> requestHandlerFactories;

    uint16_t getRequestId() {
      return requestId+=2;
    }

    // Prevent shallow copy
    RequestManager(const RequestManager &o);
    RequestManager& operator=(const RequestManager &o);

    RequestManager();

    void receiveHandler(Net::Connection *connection, const Net::Packet &packet);

  public:
    static RequestManager* get() {
      return &requestManager;
    }

    bool isCore() const {return core;}
    void setCore(bool newCore) {core = newCore;}

    virtual void doInit() {requestId = core ? -2 : -1;}

    void registerConnection(Net::Connection *connection);
    void unregisterConnection(Net::Connection *connection);

    template <class T> void registerPacketType(Net::Packet::Type type) {
      requestHandlerFactories.insert(std::make_pair(type, new SpecificRequestHandlerFactory<T>()));
    }

    void unregisterPacketType(Net::Packet::Type type);

    bool sendRequest(Net::Connection *connection, std::auto_ptr<RequestBase> request);

    virtual ~RequestManager();
};

}
}

#endif /* MAD_COMMON_REQUESTMANAGER_H_ */