/**
 * @file   key.cpp
 * @author Julian Iseringhausen <isering@ins.uni-bonn.de>
 * @date   Mon Nov 21 13:27:22 2011
 *
 * @brief  Class to distinguish the different entities in maps.
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "comm/mpi/key.hpp"
#include "grid/grid.hpp"

using namespace VMG;

VMG::MPI::Key::Key()
{
}

VMG::MPI::Key::Key(const VMG::MPI::Key& other)
{
  this->int_keys.assign(other.int_keys.begin(), other.int_keys.end());
  this->addr_keys.assign(other.addr_keys.begin(), other.addr_keys.end());
}

VMG::MPI::Key::Key(const Grid& grid)
{
  AddKey(grid);
}

VMG::MPI::Key::Key(const Grid& grid_1, const Grid& grid_2)
{
  AddKey(grid_1);
  AddKey(grid_2);
}

VMG::MPI::Key::Key(const Index& i1, const Index& i2, const Index& i3)
{
  AddKey(i1);
  AddKey(i2);
  AddKey(i3);
}

void VMG::MPI::Key::AddKey(const Grid& grid)
{
  for (int i=0; i<3; ++i) {
    int_keys.push_back(grid.Global().BeginLocal()[i]);
    int_keys.push_back(grid.Global().EndLocal()[i]);
    int_keys.push_back(grid.Global().SizeGlobal()[i]);
  }
  addr_keys.push_back(reinterpret_cast<const void*>(&grid));
}

void VMG::MPI::Key::AddKey(const Index& index)
{
  for (int i=0; i<3; ++i)
    int_keys.push_back(index[i]);
}

void VMG::MPI::Key::AddKey(const int& i)
{
  int_keys.push_back(i);
}

void VMG::MPI::Key::AddKey(const void* addr)
{
  addr_keys.push_back(addr);
}

bool VMG::MPI::Key::operator<(const Key& other) const
{
  if (this->int_keys.size() < other.int_keys.size())
    return true;
  else if (this->int_keys.size() > other.int_keys.size())
    return false;

  if (this->addr_keys.size() < other.addr_keys.size())
    return true;
  else if (this->addr_keys.size() > other.addr_keys.size())
    return false;

  for (unsigned int i=0; i<int_keys.size(); ++i)
    if (this->int_keys[i] < other.int_keys[i])
      return true;
    else if (this->int_keys[i] > other.int_keys[i])
      return false;

  for (unsigned int i=0; i<addr_keys.size(); ++i)
    if (this->addr_keys[i] < other.addr_keys[i])
      return true;
    else if (this-> addr_keys[i] > other.addr_keys[i])
      return false;

  return false;
}