# Copyright (c) Microsoft Corporation. All rights reserved.
#
# MIT License
#
# Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
# associated documentation files (the "Software"), to deal in the Software without restriction,
# including without limitation the rights to use, copy, modify, merge, publish, distribute,
# sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all copies or
# substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED *AS IS*, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
# NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
# DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
# OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
# ==================================================================================================

import os
from .common import init_logger
from .env_vars import dispatcher_env_vars

def extract_scalar_reward(value, scalar_key='default'):
    """
    Raises
    ------
    RuntimeError
        Incorrect final result: the final result should be float/int,
        or a dict which has a key named "default" whose value is float/int.
    """
    if isinstance(value, float) or isinstance(value, int):
        reward = value
    elif isinstance(value, dict) and scalar_key in value and isinstance(value[scalar_key], (float, int)):
        reward = value[scalar_key]
    else:
        raise RuntimeError('Incorrect final result: the final result for %s should be float/int, or a dict which has a key named "default" whose value is float/int.' % str(self.__class__)) 
    return reward

def init_dispatcher_logger():
    """ Initialize dispatcher logging configuration"""
    logger_file_path = 'dispatcher.log'
    if dispatcher_env_vars.NNI_LOG_DIRECTORY is not None:
        logger_file_path = os.path.join(dispatcher_env_vars.NNI_LOG_DIRECTORY, logger_file_path)
    init_logger(logger_file_path, dispatcher_env_vars.NNI_LOG_LEVEL)
