/*
 * Copyright (C) 2022 Mikhail Burakov. This file is part of toolbox.
 *
 * toolbox 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.
 *
 * toolbox 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 toolbox.  If not, see <https://www.gnu.org/licenses/>.
 */

#include "utils.h"

#include <stdarg.h>
#include <syslog.h>
#include <threads.h>
#include <time.h>

static once_flag g_once_flag = ONCE_FLAG_INIT;

static void InitLogging() { openlog(NULL, LOG_PERROR, LOG_USER); }

static int LogLevelToPriority(enum LogLevel log_level) {
  switch (log_level) {
    case kLogLevelDebug:
      return LOG_DEBUG;
    case kLogLevelInfo:
      return LOG_INFO;
    case kLogLevelWarning:
      return LOG_WARNING;
    case kLogLevelError:
      return LOG_ERR;
  }
}

void LogImpl(enum LogLevel log_level, const char* fmt, ...) {
  call_once(&g_once_flag, InitLogging);
  va_list args;
  va_start(args, fmt);
  vsyslog(LogLevelToPriority(log_level), fmt, args);
  va_end(args);
}

unsigned long long MillisNow(void) {
  struct timespec ts = {.tv_sec = 0, .tv_nsec = 0};
  clock_gettime(CLOCK_MONOTONIC, &ts);
  return (unsigned long long)ts.tv_sec * 1000ull +
         (unsigned long long)ts.tv_nsec / 1000000ull;
}