#include "CLog.h"
#include "SFString.h"

#include <iostream>
#include <fstream>
#include <cstdio>

using namespace std;

namespace X3DTK {

X3DOfstream::X3DOfstream(const char *path)
: fstream()
{
  _cwd = (char *)malloc(65535);
  findPath(path);
  SFString p(_cwd);
  p += "/x3dtk.log";
  open(static_cast<const char *>(p), fstream::in | fstream::out | fstream::trunc);
}

X3DOfstream::~X3DOfstream()
{
  free(_cwd);
  removeLog();
}

void X3DOfstream::setPath(const char *path)
{
  removeLog();
  findPath(path);
  SFString p(_cwd);
  p += "/x3dtk.log";
  open(static_cast<const char *>(p), fstream::in | fstream::out | fstream::trunc);
}

void X3DOfstream::findPath(const char *path)
{
  char *wd = (char *)malloc(65535);
  char *value = getcwd(wd, 65535);
  
  if (value == 0)
  {
    cx3d << "X3DOfstream: unable to get current working directory!" << endl;
    return;
  }  
  
  if (chdir(path) != 0)
  {
    cx3d << "X3DOfstream: unable to set the current working directory to !" << path << endl;
    return;
  }
  
  value = getcwd(_cwd, 65535);
  
  if (value == 0)
  {
    cx3d << "X3DOfstream: unable to get current working directory!" << endl;
    return;
  }  
  
  // Goes back to the initial directory.
  if (chdir(wd) != 0)
  {
    cx3d << "X3DOfstream: unable to set the current working directory to !" << _cwd << endl;
    return;
  }
  
  free(wd);
}

void X3DOfstream::removeLog()
{
  long l, m;
  seekg(0, ios::beg);
  l = tellg();
  seekg(0, ios::end);
  m = tellg();
  close();
  if (l == m)
  {
    SFString p(_cwd);
    p += "/x3dtk.log";
    remove(static_cast<const char *>(p));
  }
}

X3DOfstream cx3d(".");

}