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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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#

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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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from __future__ import absolute_import

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from weakref import ref

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# Exception type for problems that user has to take action in order to fix

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class UserAddressedException(Exception):

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    pass

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class POULibrary(object):

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    def __init__(self, CTR, LibName, TypeStack):

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        from PLCControler import PLCControler

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        self.CTR = ref(CTR)

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        self.LibName = LibName

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        self.LibraryControler = PLCControler()

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        self.LibraryControler.OpenXMLFile(self.GetLibraryPath())

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        self.LibraryControler.ClearConfNodeTypes()

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        self.LibraryControler.AddConfNodeTypesList(TypeStack)

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        self.program = None

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    def GetSTCode(self):

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        if not self.program:

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            self.program = self.LibraryControler.GenerateProgram()[0]+"\n"

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        return self.program

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    def GetName(self):

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        return self.LibName

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    def GetCTR(self):

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        return self.CTR()

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    def GetTypes(self):

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        return {"name": self.GetName(), "types": self.LibraryControler.Project}

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    def GetLibraryPath(self):

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        raise Exception("Not implemented")

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

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        # Pure python or IEC libs doesn't produce C code

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        return ((""), [], False), ""

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    def GlobalInstances(self):

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        """

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        @return: [(instance_name, instance_type),...]

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        """

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        return []

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    def FatalError(self, message):

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        """ Raise an exception that will trigger error message intended to 

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            the user, but without backtrace since it is not a software error """

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        raise UserAddressedException(message)

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def SimplePOULibraryFactory(path):

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    class SimplePOULibrary(POULibrary):

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        def GetLibraryPath(self):

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            return path

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    return SimplePOULibrary