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#!/usr/bin/env python

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# -*- coding: utf-8 -*-

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# This file is part of Beremiz, a Integrated Development Environment for

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# programming IEC 61131-3 automates supporting plcopen standard and CanFestival.

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#

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# Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD

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# Copyright (C) 2017: Andrey Skvortsov

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#

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# See COPYING file for copyrights details.

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#

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# This program is free software; you can redistribute it and/or

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# modify it under the terms of the GNU General Public License

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# as published by the Free Software Foundation; either version 2

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# of the License, or (at your option) any later version.

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#

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# This program is distributed in the hope that it will be useful,

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# but WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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# GNU General Public License for more details.

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#

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# You should have received a copy of the GNU General Public License

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# along with this program; if not, write to the Free Software

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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

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import os

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from POULibrary import POULibrary

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from PythonFileCTNMixin import PythonFileCTNMixin

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import util.paths as paths

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class PythonLibrary(POULibrary):

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    def GetLibraryPath(self):

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        return paths.AbsNeighbourFile(__file__, "pous.xml")

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    def Generate_C(self, buildpath, varlist, IECCFLAGS):

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        plc_python_filepath = paths.AbsNeighbourFile(__file__, "plc_python.c")

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        plc_python_file = open(plc_python_filepath, 'r')

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        plc_python_code = plc_python_file.read()

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        plc_python_file.close()

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        python_eval_fb_list = []

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        for v in varlist:

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            if v["vartype"] == "FB" and v["type"] in ["PYTHON_EVAL",

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                                                      "PYTHON_POLL"]:

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                python_eval_fb_list.append(v)

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        python_eval_fb_count = max(1, len(python_eval_fb_list))

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        # prepare python code

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        plc_python_code = plc_python_code % {

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            "python_eval_fb_count": python_eval_fb_count}

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        Gen_Pythonfile_path = os.path.join(buildpath, "py_ext.c")

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        pythonfile = open(Gen_Pythonfile_path, 'w')

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        pythonfile.write(plc_python_code)

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        pythonfile.close()

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        return (["py_ext"], [(Gen_Pythonfile_path, IECCFLAGS)], True), ""

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class PythonFile(PythonFileCTNMixin):

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    def GetIconName(self):

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        return "Pyfile"