Ton

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/*
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    This file is part of TON Blockchain Library.
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    TON Blockchain Library is free software: you can redistribute it and/or modify
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    it under the terms of the GNU Lesser General Public License as published by
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    the Free Software Foundation, either version 2 of the License, or
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    (at your option) any later version.
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    TON Blockchain Library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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    GNU Lesser General Public License for more details.
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    You should have received a copy of the GNU Lesser General Public License
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    along with TON Blockchain Library.  If not, see <http://www.gnu.org/licenses/>.
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    Copyright 2017-2020 Telegram Systems LLP
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*/
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#include "LoadSpeed.h"
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#include "td/utils/format.h"
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namespace ton {
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void LoadSpeed::add(td::uint64 size, td::Timestamp now) {
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  total_size_ += size;
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  events_.push(Event{size, now});
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  update(now);
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}
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double LoadSpeed::speed(td::Timestamp now) const {
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  update(now);
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  return (double)total_size_ / duration(now);
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}
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void LoadSpeed::reset() {
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  events_ = {};
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  total_size_ = 0;
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}
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td::StringBuilder &operator<<(td::StringBuilder &sb, const LoadSpeed &speed) {
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  return sb << td::format::as_size(static_cast<td::uint64>(speed.speed())) << "/s";
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}
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void LoadSpeed::update(td::Timestamp now) const {
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  while (duration(now) > 10) {
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    total_size_ -= events_.front().size;
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    events_.pop();
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  }
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}
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double LoadSpeed::duration(td::Timestamp now) const {
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  double res = 5;
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  if (!events_.empty()) {
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    res = std::max(res, now.at() - events_.front().at.at());
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  }
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  return res;
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}
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}  // namespace ton
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