/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2007 INRIA
 *
 * 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: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
 */
#include "position-allocator.h"
#include "ns3/random-variable.h"
#include "ns3/double.h"
#include "ns3/uinteger.h"
#include "ns3/enum.h"
#include "ns3/log.h"
#include <cmath>

NS_LOG_COMPONENT_DEFINE ("PositionAllocator");

namespace ns3 {

NS_OBJECT_ENSURE_REGISTERED (PositionAllocator);

TypeId 
PositionAllocator::GetTypeId (void)
{
  static TypeId tid = TypeId ("ns3::PositionAllocator")
    .SetParent<Object> ();
  return tid;
}

PositionAllocator::PositionAllocator ()
{
}

PositionAllocator::~PositionAllocator ()
{}

NS_OBJECT_ENSURE_REGISTERED (ListPositionAllocator);

TypeId 
ListPositionAllocator::GetTypeId (void)
{
  static TypeId tid = TypeId ("ns3::ListPositionAllocator")
    .SetParent<PositionAllocator> ()
    .AddConstructor<ListPositionAllocator> ()
    ;
  return tid;
}
ListPositionAllocator::ListPositionAllocator ()
{}
void 
ListPositionAllocator::Add (Vector v)
{
  m_positions.push_back (v);
  m_current = m_positions.begin ();
}
Vector 
ListPositionAllocator::GetNext (void) const
{
  Vector v = *m_current;
  m_current++;
  if (m_current == m_positions.end()) 
    {
      m_current = m_positions.begin ();
    }
  return v;
}

NS_OBJECT_ENSURE_REGISTERED (GridPositionAllocator);

TypeId 
GridPositionAllocator::GetTypeId (void)
{
  static TypeId tid = TypeId ("ns3::GridPositionAllocator")
    .SetParent<PositionAllocator> ()
    .SetGroupName ("Mobility")
    .AddConstructor<GridPositionAllocator> ()
    .AddAttribute ("GridWidth", "The number of objects layed out on a line.",
                   UintegerValue (10),
                   MakeUintegerAccessor (&GridPositionAllocator::m_n),
                   MakeUintegerChecker<uint32_t> ())
    .AddAttribute ("MinX", "The x coordinate where the grid starts.",
                   DoubleValue (1.0),
                   MakeDoubleAccessor (&GridPositionAllocator::m_xMin),
                   MakeDoubleChecker<double> ())
    .AddAttribute ("MinY", "The y coordinate where the grid starts.",
                   DoubleValue (0.0),
                   MakeDoubleAccessor (&GridPositionAllocator::m_yMin),
                   MakeDoubleChecker<double> ())
    .AddAttribute ("DeltaX", "The x space between objects.",
                   DoubleValue (1.0),
                   MakeDoubleAccessor (&GridPositionAllocator::m_deltaX),
                   MakeDoubleChecker<double> ())
    .AddAttribute ("DeltaY", "The y space between objects.",
                   DoubleValue (1.0),
                   MakeDoubleAccessor (&GridPositionAllocator::m_deltaY),
                   MakeDoubleChecker<double> ())
    .AddAttribute ("LayoutType", "The type of layout.",
                   EnumValue (ROW_FIRST),
                   MakeEnumAccessor (&GridPositionAllocator::m_layoutType),
                   MakeEnumChecker (ROW_FIRST, "RowFirst",
                                    COLUMN_FIRST, "ColumnFirst"))
    ;
  return tid;
}
GridPositionAllocator::GridPositionAllocator ()
  : m_current (0)
{}

void 
GridPositionAllocator::SetMinX (double xMin)
{
  m_xMin = xMin;
}
void 
GridPositionAllocator::SetMinY (double yMin)
{
  m_yMin = yMin;
}
void 
GridPositionAllocator::SetDeltaX (double deltaX)
{
  m_deltaX = deltaX;
}
void 
GridPositionAllocator::SetDeltaY (double deltaY)
{
  m_deltaY = deltaY;
}
void 
GridPositionAllocator::SetN (uint32_t n)
{
  m_n = n;
}
void 
GridPositionAllocator::SetLayoutType (enum LayoutType layoutType)
{
  m_layoutType = layoutType;
}

double 
GridPositionAllocator::GetMinX (void) const
{
  return m_xMin;
}
double 
GridPositionAllocator::GetMinY (void) const
{
  return m_yMin;
}
double 
GridPositionAllocator::GetDeltaX (void) const
{
  return m_deltaX;
}
double 
GridPositionAllocator::GetDeltaY (void) const
{
  return m_deltaY;
}
uint32_t 
GridPositionAllocator::GetN (void) const
{
  return m_n;
}
enum GridPositionAllocator::LayoutType 
GridPositionAllocator::GetLayoutType (void) const
{
  return m_layoutType;
}

Vector 
GridPositionAllocator::GetNext (void) const
{
  double x = 0.0, y = 0.0;
  switch (m_layoutType) {
  case ROW_FIRST:
    x = m_xMin + m_deltaX * (m_current % m_n);
    y = m_yMin + m_deltaY * (m_current / m_n);
    break;
  case COLUMN_FIRST:
    x = m_xMin + m_deltaX * (m_current / m_n);
    y = m_yMin + m_deltaY * (m_current % m_n);
    break;
  }
  m_current++;
  return Vector (x, y, 0.0);
}


NS_OBJECT_ENSURE_REGISTERED (RandomRectanglePositionAllocator);

TypeId
RandomRectanglePositionAllocator::GetTypeId (void)
{
  static TypeId tid = TypeId ("ns3::RandomRectanglePositionAllocator")
    .SetParent<PositionAllocator> ()
    .SetGroupName ("Mobility")
    .AddConstructor<RandomRectanglePositionAllocator> ()
    .AddAttribute ("X",
                   "A random variable which represents the x coordinate of a position in a random rectangle.",
                   RandomVariableValue (UniformVariable (0.0, 1.0)),
                   MakeRandomVariableAccessor (&RandomRectanglePositionAllocator::m_x),
                   MakeRandomVariableChecker ())
    .AddAttribute ("Y",
                   "A random variable which represents the y coordinate of a position in a random rectangle.",
                   RandomVariableValue (UniformVariable (0.0, 1.0)),
                   MakeRandomVariableAccessor (&RandomRectanglePositionAllocator::m_y),
                   MakeRandomVariableChecker ());
  return tid;
}

RandomRectanglePositionAllocator::RandomRectanglePositionAllocator ()
{}
RandomRectanglePositionAllocator::~RandomRectanglePositionAllocator ()
{}

void 
RandomRectanglePositionAllocator::SetX (RandomVariable x)
{
  m_x = x;
}
void 
RandomRectanglePositionAllocator::SetY (RandomVariable y)
{
  m_y = y;
}

Vector
RandomRectanglePositionAllocator::GetNext (void) const
{
  double x = m_x.GetValue ();
  double y = m_y.GetValue ();
  return Vector (x, y, 0.0);
}

NS_OBJECT_ENSURE_REGISTERED (RandomDiscPositionAllocator);

TypeId
RandomDiscPositionAllocator::GetTypeId (void)
{
  static TypeId tid = TypeId ("ns3::RandomDiscPositionAllocator")
    .SetParent<PositionAllocator> ()
    .SetGroupName ("Mobility")
    .AddConstructor<RandomDiscPositionAllocator> ()
    .AddAttribute ("Theta",
                   "A random variable which represents the angle (gradients) of a position in a random disc.",
                   RandomVariableValue (UniformVariable (0.0, 6.2830)),
                   MakeRandomVariableAccessor (&RandomDiscPositionAllocator::m_theta),
                   MakeRandomVariableChecker ())
    .AddAttribute ("Rho",
                   "A random variable which represents the radius of a position in a random disc.",
                   RandomVariableValue (UniformVariable (0.0, 200.0)),
                   MakeRandomVariableAccessor (&RandomDiscPositionAllocator::m_rho),
                   MakeRandomVariableChecker ())
    .AddAttribute ("X",
                   "The x coordinate of the center of the random position disc.",
                   DoubleValue (0.0),
                   MakeDoubleAccessor (&RandomDiscPositionAllocator::m_x),
                   MakeDoubleChecker<double> ())
    .AddAttribute ("Y",
                   "The y coordinate of the center of the random position disc.",
                   DoubleValue (0.0),
                   MakeDoubleAccessor (&RandomDiscPositionAllocator::m_y),
                   MakeDoubleChecker<double> ())
    ;
  return tid;
}   

RandomDiscPositionAllocator::RandomDiscPositionAllocator ()
{}
RandomDiscPositionAllocator::~RandomDiscPositionAllocator ()
{}

void 
RandomDiscPositionAllocator::SetTheta (RandomVariable theta)
{
  m_theta = theta;
}
void 
RandomDiscPositionAllocator::SetRho (RandomVariable rho)
{
  m_rho = rho;
}
void 
RandomDiscPositionAllocator::SetX (double x)
{
  m_x = x;
}
void 
RandomDiscPositionAllocator::SetY (double y)
{
  m_y = y;
}
Vector
RandomDiscPositionAllocator::GetNext (void) const
{
  double theta = m_theta.GetValue ();
  double rho = m_rho.GetValue ();
  double x = m_x + std::cos (theta) * rho;
  double y = m_y + std::sin (theta) * rho;
  NS_LOG_DEBUG ("Disc position x=" << x << ", y=" << y);
  return Vector (x, y, 0.0);
}


} // namespace ns3