/*
 * Copyright (c) 2008 INRIA
 * Copyright (c) 2010 Network Security Lab, University of Washington, Seattle.
 *
 * 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: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
 *          Sidharth Nabar <snabar@uw.edu>, He Wu <mdzz@u.washington.edu>
 */

#ifndef DEVICE_ENERGY_MODEL_CONTAINER_H
#define DEVICE_ENERGY_MODEL_CONTAINER_H

#include "ns3/device-energy-model.h"

#include <stdint.h>
#include <vector>

namespace ns3
{

/**
 * \ingroup energy
 * \brief Holds a vector of ns3::DeviceEnergyModel pointers.
 *
 * DeviceEnergyModelContainer returns a list of DeviceEnergyModel pointers
 * installed on a node. Users can use this list to access DeviceEnergyModel
 * objects to obtain total device energy consumption on a node easily.
 *
 * \see NetDeviceContainer
 *
 */
class DeviceEnergyModelContainer
{
  public:
    /// Const iterator of DeviceEnergyModel container
    typedef std::vector<Ptr<DeviceEnergyModel>>::const_iterator Iterator;

  public:
    /**
     * Creates an empty DeviceEnergyModelContainer.
     */
    DeviceEnergyModelContainer();

    /**
     * \param model Pointer to a DeviceEnergyModel.
     *
     * Creates a DeviceEnergyModelContainer with exactly one DeviceEnergyModel
     * previously instantiated.
     */
    DeviceEnergyModelContainer(Ptr<DeviceEnergyModel> model);

    /**
     * \param modelName Name of DeviceEnergyModel.
     *
     * Creates an DeviceEnergyModelContainer with exactly one DeviceEnergyModel
     * previously instantiated and assigned a name using the Object name service.
     * This DeviceEnergyModel is specified by its assigned name.
     */
    DeviceEnergyModelContainer(std::string modelName);

    /**
     * \param a A DeviceEnergyModelContainer.
     * \param b Another DeviceEnergyModelContainer.
     *
     * Creates a DeviceEnergyModelContainer by concatenating DeviceEnergyModelContainer b
     * to DeviceEnergyModelContainer a.
     *
     * \note Can be used to concatenate 2 Ptr<DeviceEnergyModel> directly. C++
     * will be calling DeviceEnergyModelContainer constructor with Ptr<DeviceEnergyModel>
     * first.
     */
    DeviceEnergyModelContainer(const DeviceEnergyModelContainer& a,
                               const DeviceEnergyModelContainer& b);

    /**
     * \brief Get an iterator which refers to the first DeviceEnergyModel pointer
     * in the container.
     *
     * \returns An iterator which refers to the first DeviceEnergyModel in container.
     *
     * DeviceEnergyModels can be retrieved from the container in two ways. First,
     * directly by an index into the container, and second, using an iterator.
     * This method is used in the iterator method and is typically used in a
     * for-loop to run through the DeviceEnergyModels.
     *
     * \code
     *   DeviceEnergyModelContainer::Iterator i;
     *   for (i = container.Begin (); i != container.End (); ++i)
     *     {
     *       (*i)->method ();  // some DeviceEnergyModel method
     *     }
     * \endcode
     */
    Iterator Begin() const;

    /**
     * \brief Get an iterator which refers to the last DeviceEnergyModel pointer
     * in the container.
     *
     * \returns An iterator which refers to the last DeviceEnergyModel in container.
     *
     * DeviceEnergyModels can be retrieved from the container in two ways. First,
     * directly by an index into the container, and second, using an iterator.
     * This method is used in the iterator method and is typically used in a
     * for-loop to run through the DeviceEnergyModels.
     *
     * \code
     *   DeviceEnergyModelContainer::Iterator i;
     *   for (i = container.Begin (); i != container.End (); ++i)
     *     {
     *       (*i)->method ();  // some DeviceEnergyModel method
     *     }
     * \endcode
     */
    Iterator End() const;

    /**
     * \brief Get the number of Ptr<DeviceEnergyModel> stored in this container.
     *
     * \returns The number of Ptr<DeviceEnergyModel> stored in this container.
     */
    uint32_t GetN() const;

    /**
     * \brief Get the i-th Ptr<DeviceEnergyModel> stored in this container.
     *
     * \param i Index of the requested Ptr<DeviceEnergyModel>.
     * \returns The requested Ptr<DeviceEnergyModel>.
     */
    Ptr<DeviceEnergyModel> Get(uint32_t i) const;

    /**
     * \param container Another DeviceEnergyModelContainer.
     *
     * Appends the contents of another DeviceEnergyModelContainer to the end of
     * this DeviceEnergyModelContainer.
     */
    void Add(DeviceEnergyModelContainer container);

    /**
     * \brief Append a single Ptr<DeviceEnergyModel> to the end of this container.
     *
     * \param model Pointer to an DeviceEnergyModel.
     */
    void Add(Ptr<DeviceEnergyModel> model);

    /**
     * \brief Append a single Ptr<DeviceEnergyModel> referred to by its object
     * name to the end of this container.
     *
     * \param modelName Name of DeviceEnergyModel object.
     */
    void Add(std::string modelName);

    /**
     * \brief Removes all elements in the container.
     */
    void Clear();

  private:
    std::vector<Ptr<DeviceEnergyModel>> m_models; //!< Container of Energy models
};

} // namespace ns3

#endif /* DEVICE_ENERGY_MODEL_CONTAINER_H */
