#include <bits/time.h>
#include <limits.h>
#include <time.h>

#include "types.h"

#include "timer.h"

void timer_init(Timer *timer, const unsigned int target) {
  timer->counter = 0;
  timer->target = target;
  clock_gettime(CLOCK_REALTIME, &timer->start);
}

bool timer_inc(Timer *timer) {
  timer->counter += 1;
  return timer->counter == UINT_MAX || timer->counter >= timer->target;
}

double timer_reset(Timer *timer) {
  struct timespec stop;
  double secs;
  double per_secs;

  if (clock_gettime(CLOCK_REALTIME, &stop) != 0) {
    return 0.0;
  }

  secs = (double)(stop.tv_sec - timer->start.tv_sec) +
         (double)(stop.tv_nsec - timer->start.tv_nsec) / 1e9;
  per_secs = (double)timer->counter / secs;

  timer->start = stop;
  timer->counter = 0;

  return per_secs;
}