/***
    This file is part of snapcast
    Copyright (C) 2015  Johannes Pohl

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
***/

#include "timeProvider.h"
#include "common/log.h"


TimeProvider::TimeProvider() : diffToServer_(0)
{
	diffBuffer_.setSize(200);
}


void TimeProvider::setDiffToServer(double ms)
{
	static int32_t lastTimeSync = 0;
	timeval now;
	gettimeofday(&now, NULL);

	/// clear diffBuffer if last update is older than a minute
	if (!diffBuffer_.empty() && (abs(now.tv_sec - lastTimeSync) > 60))
	{
		logO << "Last time sync older than a minute. Clearing time buffer\n";
		diffToServer_ = ms*1000;
		diffBuffer_.clear();
	}
	lastTimeSync = now.tv_sec;

	diffBuffer_.add(ms*1000);
	diffToServer_ = diffBuffer_.median(3);
//	logO << "setDiffToServer: " << ms << ", diff: " << diffToServer_ / 1000.f << "\n";
}

/*
long TimeProvider::getPercentileDiffToServer(size_t percentile)
{
	return diffBuffer.percentile(percentile);
}
*/