#ifndef POINT_TO_POINT_HELPER_H

#define POINT_TO_POINT_HELPER_H

#include "ns3/object-factory.h"

#include "ns3/net-device-container.h"

#include "ns3/node-container.h"

#include <string>

namespace ns3 {

class Queue;

class NetDevice;

class Node;

class PcapWriter;

/**

 * \brief build a set of PointToPointNetDevice objects

 */

class PointToPointHelper

{

public:

  // by default, create queues of type DropTailQueue.

  PointToPointHelper ();

  /**

   * \param type the type of queue

   * \param n1 the name of the attribute to set on the queue

   * \param v1 the value of the attribute to set on the queue

   * \param n2 the name of the attribute to set on the queue

   * \param v2 the value of the attribute to set on the queue

   * \param n3 the name of the attribute to set on the queue

   * \param v3 the value of the attribute to set on the queue

   * \param n4 the name of the attribute to set on the queue

   * \param v4 the value of the attribute to set on the queue

   *

   * Set the type of queue to create and associated to each

   * PointToPointNetDevice created through PointToPointHelper::Build.

   */

  void SetQueue (std::string type,

		 std::string n1 = "", Attribute v1 = Attribute (),

		 std::string n2 = "", Attribute v2 = Attribute (),

		 std::string n3 = "", Attribute v3 = Attribute (),

		 std::string n4 = "", Attribute v4 = Attribute ());

  /**

   * \param name the name of the attribute to set

   * \param value the value of the attribute to set

   *

   * Set these parameters on each ns3::PointToPointNetDevice created

   * by PointToPointHelper::Build

   */

  void SetDeviceParameter (std::string name, Attribute value);

  /**

   * \param name the name of the attribute to set

   * \param value the value of the attribute to set

   *

   * Set these parameters on each ns3::PointToPointChannel created

   * by PointToPointHelper::Build

   */

  void SetChannelParameter (std::string name, Attribute value);

  /**

   * \param filename filename prefix to use for pcap files.

   * \param nodeid the id of the node to generate pcap output for.

   * \param deviceid the id of the device to generate pcap output for.

   *

   * Generate a pcap file which contains the link-level data observed

   * by the specified deviceid within the specified nodeid. The pcap

   * data is stored in the file prefix-nodeid-deviceid.

   *

   * This method should be invoked after the network topology has 

   * been fully constructed.

   */

  static void EnablePcap (std::string filename, uint32_t nodeid, uint32_t deviceid);

  /**

   * \param filename filename prefix to use for pcap files.

   * \param d container of devices of type ns3::PointToPointNetDevice

   *

   * Enable pcap output on each input device which is of the

   * ns3::PointToPointNetDevice type.

   */

  static void EnablePcap (std::string filename, NetDeviceContainer d);

  /**

   * \param filename filename prefix to use for pcap files.

   * \param n container of nodes.

   *

   * Enable pcap output on each device which is of the

   * ns3::PointToPointNetDevice type and which is located in one of the 

   * input nodes.

   */

  static void EnablePcap (std::string filename, NodeContainer n);

  /**

   * \param filename filename prefix to use for pcap files.

   *

   * Enable pcap output on each device which is of the

   * ns3::PointToPointNetDevice type

   */

  static void EnablePcap (std::string filename);

  /**

   * \param os output stream

   * \param nodeid the id of the node to generate ascii output for.

   * \param deviceid the id of the device to generate ascii output for.

   *

   * Enable ascii output on the specified deviceid within the

   * specified nodeid if it is of type ns3::PointToPointNetDevice and dump 

   * that to the specified stdc++ output stream.

   */

  static void EnableAscii (std::ostream &os, uint32_t nodeid, uint32_t deviceid);

  /**

   * \param os output stream

   * \param d device container

   *

   * Enable ascii output on each device which is of the

   * ns3::PointToPointNetDevice type and which is located in the input

   * device container and dump that to the specified

   * stdc++ output stream.

   */

  static void EnableAscii (std::ostream &os, NetDeviceContainer d);

  /**

   * \param os output stream

   * \param n node container

   *

   * Enable ascii output on each device which is of the

   * ns3::PointToPointNetDevice type and which is located in one

   * of the input node and dump that to the specified

   * stdc++ output stream.

   */

  static void EnableAscii (std::ostream &os, NodeContainer n);

  /**

   * \param os output stream

   *

   * Enable ascii output on each device which is of the

   * ns3::PointToPointNetDevice type and dump that to the specified

   * stdc++ output stream.

   */

  static void EnableAscii (std::ostream &os);

  /**

   * \param c a set of nodes

   *

   * This method creates a ns3::PointToPointChannel with the

   * attributes configured by PointToPointHelper::SetChannelParameter,

   * then, for each node in the input container, we create a 

   * ns3::PointToPointNetDevice with the requested parameters, 

   * a queue for this ns3::NetDevice, and associate the resulting 

   * ns3::NetDevice with the ns3::Node and ns3::PointToPointChannel.

   */

  NetDeviceContainer Build (NodeContainer c);

  /**

   * \param a first node

   * \param b second node

   *

   * Saves you from having to construct a temporary NodeContainer.

   */

  NetDeviceContainer Build (Ptr<Node> a, Ptr<Node> b);

private:

  void EnablePcap (Ptr<Node> node, Ptr<NetDevice> device, Ptr<Queue> queue);

  void EnableAscii (Ptr<Node> node, Ptr<NetDevice> device);

  static void RxEvent (Ptr<PcapWriter> writer, Ptr<const Packet> packet);

  static void EnqueueEvent (Ptr<PcapWriter> writer, Ptr<const Packet> packet);

  static void AsciiEnqueueEvent (std::ostream *os, std::string path, Ptr<const Packet> packet);

  static void AsciiDequeueEvent (std::ostream *os, std::string path, Ptr<const Packet> packet);

  static void AsciiDropEvent (std::ostream *os, std::string path, Ptr<const Packet> packet);

  static void AsciiRxEvent (std::ostream *os, std::string path, Ptr<const Packet> packet);

  ObjectFactory m_queueFactory;

  ObjectFactory m_channelFactory;

  ObjectFactory m_deviceFactory;

};

} // namespace ns3

#endif /* POINT_TO_POINT_HELPER_H */