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# Copyright (c) 2012 - 2021, Anaconda, Inc., and Bokeh Contributors.
# All rights reserved.
#
# The full license is in the file LICENSE.txt, distributed with this software.
#-----------------------------------------------------------------------------

#-----------------------------------------------------------------------------
# Boilerplate
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from __future__ import annotations

import logging # isort:skip
log = logging.getLogger(__name__)

#-----------------------------------------------------------------------------
# Imports
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# Standard library imports
from typing import Any

# Bokeh imports
from ...core.types import ID
from ..message import Empty, Message

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# Globals and constants
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__all__ = (
    'ok',
)

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# General API
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#-----------------------------------------------------------------------------
# Dev API
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class ok(Message[Empty]):
    ''' Define the ``OK`` message for acknowledging successful handling of a
    previous message.

    The ``content`` fragment of for this message is empty.

    '''

    msgtype = 'OK'

    @classmethod
    def create(cls, request_id: ID, **metadata: Any) -> ok:
        ''' Create an ``OK`` message

        Args:
            request_id (str) :
                The message ID for the message the precipitated the OK.

        Any additional keyword arguments will be put into the message
        ``metadata`` fragment as-is.

        '''
        header = cls.create_header(request_id=request_id)
        return cls(header, metadata, Empty())

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# Private API
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#-----------------------------------------------------------------------------
# Code
#-----------------------------------------------------------------------------