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#!/usr/bin/env python

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

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from __future__ import absolute_import

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from __future__ import print_function

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import traceback

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import sys

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from runtime.Worker import worker

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MainWorker = worker()

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_PLCObjectSingleton = None

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def GetPLCObjectSingleton():

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    assert _PLCObjectSingleton is not None

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    return _PLCObjectSingleton

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def LogMessageAndException(msg, exp=None):

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    if exp is None:

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        exp = sys.exc_info()

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    if _PLCObjectSingleton is not None:

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        _PLCObjectSingleton.LogMessage(0, msg + '\n'.join(traceback.format_exception(*exp)))

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    print(msg)

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    traceback.print_exception(*exp)

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def CreatePLCObjectSingleton(*args, **kwargs):

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    global _PLCObjectSingleton

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    from runtime.PLCObject import PLCObject  # noqa # pylint: disable=wrong-import-position

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    _PLCObjectSingleton = PLCObject(*args, **kwargs)

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def default_evaluator(tocall, *args, **kwargs):

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    try:

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        res = (tocall(*args, **kwargs), None)

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    except Exception:

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        res = (None, sys.exc_info())

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    return res