/*
 * Copyright (c) 2009 IITP RAS
 *
 * 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
 *
 * Author: Kirill Andreev <andreev@iitp.ru>
 */

#ifndef FLAME_PROTOCOL_MAC_H
#define FLAME_PROTOCOL_MAC_H

#include "ns3/mesh-wifi-interface-mac.h"

namespace ns3
{
namespace flame
{
class FlameProtocol;

/**
 * \ingroup flame
 *
 * \brief Interface MAC plugin for FLAME routing protocol
 */
class FlameProtocolMac : public MeshWifiInterfaceMacPlugin
{
  public:
    /**
     * Constructor
     *
     * \param protocol flame protocol object
     */
    FlameProtocolMac(Ptr<FlameProtocol> protocol);
    ~FlameProtocolMac() override;

    // Inherited from MAC plugin
    /**
     * Set parent of this instance
     * \param parent pointer to the parent MeshWifiInterfaceMac
     */
    void SetParent(Ptr<MeshWifiInterfaceMac> parent) override;
    /**
     * Receive and process a packet; packets are given a FlameTag packet tag
     * \param packet the packet received
     * \param header the header
     * \returns true if successful
     */
    bool Receive(Ptr<Packet> packet, const WifiMacHeader& header) override;
    /**
     * Process an outgoing frame.  Remove the FlameTag and increment stats
     * counters.
     * \param packet the packet received
     * \param header the header
     * \param from the MAC address of the sender
     * \param to the MAC address of the receiver
     * \returns true if successful
     */
    bool UpdateOutcomingFrame(Ptr<Packet> packet,
                              WifiMacHeader& header,
                              Mac48Address from,
                              Mac48Address to) override;
    /**
     * Update beacon is empty, because FLAME does not know anything about beacons
     * \param beacon the beacon
     */
    void UpdateBeacon(MeshWifiBeacon& beacon) const override{};

    /**
     * AssignStreams is empty, because this model doesn't use random variables
     * \param stream
     * \returns 0 (no streams used)
     */
    int64_t AssignStreams(int64_t stream) override
    {
        return 0;
    }

    /**
     * Get channel ID function
     * \returns the channel
     */
    uint16_t GetChannelId() const;
    /**
     * Report statistics
     * \param os the output stream
     */
    void Report(std::ostream& os) const;
    /// Reset statistics function
    void ResetStats();

  private:
    // MeshPointDevice parameters:
    Ptr<FlameProtocol> m_protocol;      ///< protocol
    Ptr<MeshWifiInterfaceMac> m_parent; ///< parent

    /// Statistics structure
    struct Statistics
    {
        uint16_t txUnicast;   ///< transmit unicast
        uint16_t txBroadcast; ///< transit broadcast
        uint32_t txBytes;     ///< transmit bytes
        uint16_t rxUnicast;   ///< receive unicast
        uint16_t rxBroadcast; ///< receive broadcast
        uint32_t rxBytes;     ///< receive bytes

        /**
         * Print function
         * \param os the output stream
         */
        void Print(std::ostream& os) const;
        /// constructor
        Statistics();
    };

    Statistics m_stats; ///< statistics
};
} // namespace flame
} // namespace ns3
#endif /* FLAME_PROTOCOL_MAC_H */
