/*
 * libdatachannel streamer example
 * Copyright (c) 2020 Filip Klembara (in2core)
 *
 * 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 2
 * 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 "helpers.hpp"
#include <ctime>

#ifdef _WIN32
// taken from https://stackoverflow.com/questions/10905892/equivalent-of-gettimeday-for-windows
#include <Windows.h>

struct timezone {
    int tz_minuteswest;
    int tz_dsttime;
};
int gettimeofday(struct timeval *tv, struct timezone *tz)
{
    if (tv) {
        FILETIME               filetime; /* 64-bit value representing the number of 100-nanosecond intervals since January 1, 1601 00:00 UTC */
        ULARGE_INTEGER         x;
        ULONGLONG              usec;
        static const ULONGLONG epoch_offset_us = 11644473600000000ULL; /* microseconds betweeen Jan 1,1601 and Jan 1,1970 */

#if _WIN32_WINNT >= _WIN32_WINNT_WIN8
        GetSystemTimePreciseAsFileTime(&filetime);
#else
        GetSystemTimeAsFileTime(&filetime);
#endif
        x.LowPart =  filetime.dwLowDateTime;
        x.HighPart = filetime.dwHighDateTime;
        usec = x.QuadPart / 10  -  epoch_offset_us;
        tv->tv_sec  = (time_t)(usec / 1000000ULL);
        tv->tv_usec = (long)(usec % 1000000ULL);
    }
    if (tz) {
        TIME_ZONE_INFORMATION timezone;
        GetTimeZoneInformation(&timezone);
        tz->tz_minuteswest = timezone.Bias;
        tz->tz_dsttime = 0;
    }
    return 0;
}
#else
#include <sys/time.h>
#endif

using namespace std;
using namespace rtc;

ClientTrackData::ClientTrackData(shared_ptr<Track> track, shared_ptr<RtcpSrReporter> sender) {
    this->track = track;
    this->sender = sender;
}

void Client::setState(State state) {
    std::unique_lock lock(_mutex);
    this->state = state;
}

Client::State Client::getState() {
    std::shared_lock lock(_mutex);
    return state;
}

ClientTrack::ClientTrack(string id, shared_ptr<ClientTrackData> trackData) {
    this->id = id;
    this->trackData = trackData;
}

uint64_t currentTimeInMicroSeconds() {
    struct timeval time;
    gettimeofday(&time, NULL);
    return uint64_t(time.tv_sec) * 1000 * 1000 + time.tv_usec;
}