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# Copyright (c) 2023-present, BAAI. All Rights Reserved.
#
# 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
#
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# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, esither express or implied.
# See the License for the specific language governing permissions and
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"""Trackable statistics."""

import collections
import numpy as np


class SmoothedValue(object):
    """Track values and provide smoothed report."""

    def __init__(self, window_size=None):
        self.deque = collections.deque(maxlen=window_size)
        self.total = 0.0
        self.count = 0

    def update(self, value):
        self.deque.append(value)
        self.count += 1
        self.total += value

    def mean(self):
        return np.mean(self.deque)

    def median(self):
        return np.median(self.deque)

    def average(self):
        return self.total / self.count