/*
 * Copyright (c) 2011 Centre Tecnologic de Telecomunicacions de Catalunya (CTTC)
 *
 * 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: Jaume Nin <jnin@cttc.es>
 */

#ifndef LTE_STATS_CALCULATOR_H_
#define LTE_STATS_CALCULATOR_H_

#include "ns3/object.h"
#include "ns3/string.h"

#include <map>

namespace ns3
{

/**
 * \ingroup lte
 *
 * Base class for ***StatsCalculator classes. Provides
 * basic functionality to parse and store IMSI and CellId.
 * Also stores names of output files.
 */

class LteStatsCalculator : public Object
{
  public:
    /**
     * Constructor
     */
    LteStatsCalculator();

    /**
     * Destructor
     */
    ~LteStatsCalculator() override;

    /**
     * Register this type.
     * \return The object TypeId.
     */
    static TypeId GetTypeId();

    /**
     * Set the name of the file where the uplink statistics will be stored.
     *
     * \param outputFilename string with the name of the file
     */
    void SetUlOutputFilename(std::string outputFilename);

    /**
     * Get the name of the file where the uplink statistics will be stored.
     * @return the name of the file where the uplink statistics will be stored
     */
    std::string GetUlOutputFilename();

    /**
     * Set the name of the file where the downlink statistics will be stored.
     *
     * @param outputFilename string with the name of the file
     */
    void SetDlOutputFilename(std::string outputFilename);

    /**
     * Get the name of the file where the downlink statistics will be stored.
     * @return the name of the file where the downlink statistics will be stored
     */
    std::string GetDlOutputFilename();

    /**
     * Checks if there is an already stored IMSI for the given path
     * @param path Path in the attribute system to check
     * @return true if the path exists, false otherwise
     */
    bool ExistsImsiPath(std::string path);

    /**
     * Stores the (path, imsi) pairs in a map
     * @param path Path in the attribute system to store
     * @param imsi IMSI value to store
     */
    void SetImsiPath(std::string path, uint64_t imsi);

    /**
     * Retrieves the imsi information for the given path
     * @param path Path in the attribute system to get
     * @return the IMSI associated with the given path
     */
    uint64_t GetImsiPath(std::string path);

    /**
     * Checks if there is an already stored cell id for the given path
     * @param path Path in the attribute system to check
     * @return true if the path exists, false otherwise
     */
    bool ExistsCellIdPath(std::string path);

    /**
     * Stores the (path, cellId) pairs in a map
     * @param path Path in the attribute system to store
     * @param cellId cell id value to store
     */
    void SetCellIdPath(std::string path, uint16_t cellId);

    /**
     * Retrieves the cell id information for the given path
     * @param path Path in the attribute system to get
     * @return the cell ID associated with the given path
     */
    uint16_t GetCellIdPath(std::string path);

  protected:
    /**
     * Retrieves IMSI from Enb RLC path in the attribute system
     * @param path Path in the attribute system to get
     * @return the IMSI associated with the given path
     */
    static uint64_t FindImsiFromEnbRlcPath(std::string path);

    /**
     * Retrieves IMSI from Ue PHY path in the attribute system
     * @param path Path in the attribute system to get
     * @return the IMSI associated with the given path
     */
    static uint64_t FindImsiFromUePhy(std::string path);

    /**
     * Retrieves IMSI from LteNetDevice path in the attribute system
     * @param path Path in the attribute system to get
     * @return the IMSI associated with the given path
     */
    static uint64_t FindImsiFromLteNetDevice(std::string path);

    /**
     * Retrieves CellId from Enb RLC path in the attribute system
     * @param path Path in the attribute system to get
     * @return the CellId associated with the given path
     */
    static uint16_t FindCellIdFromEnbRlcPath(std::string path);

    /**
     * Retrieves IMSI from Enb MAC path in the attribute system
     * @param path Path in the attribute system to get
     * @param rnti RNTI of UE for which IMSI is needed
     * @return the IMSI associated with the given path and RNTI
     */
    static uint64_t FindImsiFromEnbMac(std::string path, uint16_t rnti);

    /**
     * Retrieves CellId from Enb MAC path in the attribute system
     * @param path Path in the attribute system to get
     * @param rnti RNTI of UE for which CellId is needed
     * @return the CellId associated with the given path and RNTI
     */
    static uint16_t FindCellIdFromEnbMac(std::string path, uint16_t rnti);

    /**
     * Retrieves IMSI from path for Enb in the attribute system
     * @param path Path in the attribute system to get
     * @param rnti RNTI of UE for which IMSI is needed
     * @return the IMSI associated with the given path and RNTI
     */
    static uint64_t FindImsiForEnb(std::string path, uint16_t rnti);

    /**
     * Retrieves IMSI from path for Ue in the attribute system
     * @param path Path in the attribute system to get
     * @param rnti RNTI of UE for which IMSI is needed
     * @return the IMSI associated with the given path and RNTI
     */
    static uint64_t FindImsiForUe(std::string path, uint16_t rnti);

  private:
    /**
     * List of IMSI by path in the attribute system
     */
    std::map<std::string, uint64_t> m_pathImsiMap;

    /**
     * List of CellId by path in the attribute system
     */
    std::map<std::string, uint16_t> m_pathCellIdMap;

    /**
     * Name of the file where the downlink results will be saved
     */
    std::string m_dlOutputFilename;

    /**
     * Name of the file where the uplink results will be saved
     */
    std::string m_ulOutputFilename;
};

} // namespace ns3

#endif /* LTE_STATS_CALCULATOR_H_ */
