/*
 * Copyright (c) 2007,2008,2009 INRIA, UDcast
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Authors: Jahanzeb Farooq <jahanzeb.farooq@sophia.inria.fr>
 *          Mohamed Amine Ismail <amine.ismail@sophia.inria.fr>
 *                               <amine.ismail@UDcast.com>
 */

#ifndef CONNECTION_MANAGER_H
#define CONNECTION_MANAGER_H

#include "cid.h"
#include "wimax-connection.h"

#include "ns3/mac48-address.h"

#include <stdint.h>

namespace ns3
{

class CidFactory;
class SSRecord;
class RngRsp;
class WimaxNetDevice;
class SubscriberStationNetDevice;

/**
 * \ingroup wimax
 * The same connection manager class serves both for BS and SS though some functions are exclusive
 * to only one of them.
 */

class ConnectionManager : public Object
{
  public:
    /**
     * \brief Get the type ID.
     * \return the object TypeId
     */
    static TypeId GetTypeId();
    ConnectionManager();
    ~ConnectionManager() override;
    void DoDispose() override;
    /**
     * Set CID factory
     * \param cidFactory the CID factory
     */
    void SetCidFactory(CidFactory* cidFactory);
    /**
     * \brief allocates the management connection for an ss record. This method is only used by BS
     * \param ssRecord the ss record to which the management connection will be allocated
     * \param rngrsp the ranging response message
     */
    void AllocateManagementConnections(SSRecord* ssRecord, RngRsp* rngrsp);
    /**
     * \brief create a connection of type type
     * \param type type of the connection to create
     * \return a smart pointer to the created WimaxConnection
     */
    Ptr<WimaxConnection> CreateConnection(Cid::Type type);
    /**
     * \brief add a connection to the list of managed connections
     * \param connection the connection to add
     * \param type the type of connection to add
     */
    void AddConnection(Ptr<WimaxConnection> connection, Cid::Type type);
    /**
     * \param cid the connection identifier
     * \return the connection corresponding to cid
     */
    Ptr<WimaxConnection> GetConnection(Cid cid);
    /**
     * \param type the type of connection to add
     * \return a vector of all connections matching the input type
     */
    std::vector<Ptr<WimaxConnection>> GetConnections(Cid::Type type) const;
    /**
     * \brief get number of packets
     * \param type the type of connection to add
     * \param schedulingType the scheduling type
     * \returns number of packets
     */
    uint32_t GetNPackets(Cid::Type type, ServiceFlow::SchedulingType schedulingType) const;
    /**
     * \return true if one of the managed connection has at least one packet to send, false
     * otherwise
     */
    bool HasPackets() const;

  private:
    std::vector<Ptr<WimaxConnection>> m_basicConnections;     ///< basic connections
    std::vector<Ptr<WimaxConnection>> m_primaryConnections;   ///< primary connections
    std::vector<Ptr<WimaxConnection>> m_transportConnections; ///< transport connections
    std::vector<Ptr<WimaxConnection>> m_multicastConnections; ///< multicast connections
    // only for BS
    CidFactory* m_cidFactory; ///< the factory
};

} // namespace ns3

#endif /* CONNECTION_MANAGER_H */
