#include "X3D_GLBuilderStateVariables.h"

#include <algorithm>
#include <iostream>

using namespace std;

namespace X3DTK {
namespace X3D {

GLBuilderStateVariables::GLBuilderStateVariables()
: StateVariables(), _root(0)
{
  _cwd = (char *)malloc(65535);
}

GLBuilderStateVariables::~GLBuilderStateVariables()
{
  free(_cwd);
}

void GLBuilderStateVariables::init()
{
  _root = 0;
  _nodeStack.push_front(0);
  
  // Goes to the directory of the file.
  char *value = getcwd(_cwd, 65535);
  
  if (value == 0)
  {
    cx3d << "GLBuilderStateVariables::init: unable to get current working directory!" << endl;
    return;
  }
}

void GLBuilderStateVariables::finish()
{
  // Returns to the initial directory.
  if ((_cwd != 0) && (chdir(_cwd) != 0))
    cx3d << "GLBuilderStateVariables::finish: unable to set the current working directory to !" << _cwd << endl;
    
  _nodeStack.clear();
  _nodeCoupleMap.clear();
}

void GLBuilderStateVariables::addCoupleNode(SFNode N, GL::X3DNode *GN)
{
  _nodeCoupleMap[N] = GN;  
  
  // init root node.
  if (_root == 0)
    _root = GN;
}

void GLBuilderStateVariables::pushNode(GL::X3DNode *N)
{
  GL::X3DNode *T = getTop();
  if (T != 0)
    T->setChild(N);
    
  // filling the stack.    
  _nodeStack.push_front(N);
}

void GLBuilderStateVariables::popNode()
{
  _nodeStack.pop_front();
}

GL::X3DNode *GLBuilderStateVariables::getNode(SFNode N) const
{
  map<SFNode, GL::X3DNode *>::const_iterator it = _nodeCoupleMap.find(N);
  if (it != _nodeCoupleMap.end())
    return (*it).second;
    
  return 0;  
}

}
}