/*
 * Project: MoleCuilder
 * Description: creates and alters molecular systems
 * Copyright (C)  2013 Frederik Heber. All rights reserved.
 * 
 *
 *   This file is part of MoleCuilder.
 *
 *    MoleCuilder is free software: you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation, either version 2 of the License, or
 *    (at your option) any later version.
 *
 *    MoleCuilder 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 MoleCuilder.  If not, see <http://www.gnu.org/licenses/>.
 */

/*
 * PythonScripting.cpp
 *
 *  Created on: Aug 26, 2013
 *      Author: heber
 */

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

// boost::python uses placement new which is incompatible with MemDebug.
#include "PythonScripting_impl.hpp"
#include "PythonScripting.hpp"

#include "CodePatterns/MemDebug.hpp"

bool executePythonScript(const std::string &pythonfilename_string)
{
  boost::filesystem::path pythonfilename(pythonfilename_string);
  if (exists(pythonfilename)) {
    // parse in and execute the local and global config.py
    try {
      PyImport_AppendInittab( "pyMoleCuilder", &initpyMoleCuilder );

      Py_Initialize();

      boost::python::object main_module((
          boost::python::handle<>(boost::python::borrowed(PyImport_AddModule("__main__")))));

      boost::python::object main_namespace = main_module.attr("__dict__");

      boost::python::object molecuilder_module( (boost::python::handle<>(PyImport_ImportModule("pyMoleCuilder"))) );
      main_namespace["pyMoleCuilder"] = molecuilder_module;

      // parse file into a string
      std::ifstream pythonfile(pythonfilename.string().c_str());
      std::string pythonscript( std::istreambuf_iterator<char>(pythonfile),
          (std::istreambuf_iterator<char>()) );
      std::string enveloped_script("print \"BEGIN of "+pythonfilename_string+":\"\n");
      enveloped_script += pythonscript;
      enveloped_script += std::string("print \"END of "+pythonfilename_string+":\"\n");

      boost::python::handle<> ignored(( PyRun_String( enveloped_script.c_str(),
          Py_file_input,
          main_namespace.ptr(),
          main_namespace.ptr() ) ));

    } catch( boost::python::error_already_set ) {
      PyErr_Print();
      return false;
    }
    return true;
  }
  return false;
}