/* This work is licensed under a Creative Commons CCZero 1.0 Universal License.
 * See http://creativecommons.org/publicdomain/zero/1.0/ for more information. 
 *
 *    Copyright 2016-2017 (c) Julius Pfrommer, Fraunhofer IOSB
 *    Copyright 2017 (c) Stefan Profanter, fortiss GmbH
 *    Copyright 2017 (c) Thomas Stalder
 */

#ifdef UA_ARCHITECTURE_FREERTOS

#include "ua_types.h"
#include <time.h>
#include <sys/time.h>

#include <task.h>

UA_DateTime UA_DateTime_now(void) {
    struct timeval tv;
    gettimeofday(&tv, NULL);
    return (tv.tv_sec * UA_DATETIME_SEC) + (tv.tv_usec * UA_DATETIME_USEC) + UA_DATETIME_UNIX_EPOCH;
}

/* Credit to https://stackoverflow.com/questions/13804095/get-the-time-zone-gmt-offset-in-c */
UA_Int64 UA_DateTime_localTimeUtcOffset(void) {
    time_t gmt, rawtime = time(NULL);
    struct tm *ptm;
    struct tm gbuf;
    ptm = gmtime_r(&rawtime, &gbuf);
    // Request that mktime() looksup dst in timezone database
    ptm->tm_isdst = -1;
    gmt = mktime(ptm);
    return (UA_Int64) (difftime(rawtime, gmt) * UA_DATETIME_SEC);
}

UA_DateTime UA_DateTime_nowMonotonic(void) {
    portTickType TaskTime = xTaskGetTickCount();
    UA_DateTimeStruct UATime;
    UATime.milliSec = (UA_UInt16) TaskTime;
    struct timespec ts;
    ts.tv_sec = UATime.milliSec/1000;
    ts.tv_nsec = (UATime.milliSec % 1000)* 1000000;
    return (ts.tv_sec * UA_DATETIME_SEC) + (ts.tv_nsec / 100);
}

#endif /* UA_ARCHITECTURE_FREERTOS */