# Copyright 2020 Huawei Technologies Co., Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ============================================================================
# encoding: utf-8
"""
@author:  sherlock
@contact: sherlockliao01@gmail.com
"""

import logging
import os
import sys


def setup_logger(name, save_dir, distributed_rank):
    logger = logging.getLogger(name)
    logger.setLevel(logging.DEBUG)
    # don't log results for the non-master process
    if distributed_rank > 0:
        return logger
    ch = logging.StreamHandler(stream=sys.stdout)
    ch.setLevel(logging.DEBUG)
    formatter = logging.Formatter("%(asctime)s %(name)s %(levelname)s: %(message)s")
    ch.setFormatter(formatter)
    logger.addHandler(ch)

    if save_dir:
        fh = logging.FileHandler(os.path.join(save_dir, "log.txt"), mode='w')
        fh.setLevel(logging.DEBUG)
        fh.setFormatter(formatter)
        logger.addHandler(fh)

    return logger