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from weakref import ref

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class POULibrary:

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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), ""