#include <stdbool.h>
#include <stdint.h>
#include <stddef.h>
#include <sysdefs/time.h>

bool time_isleap(uint32_t y) {
  return ((y % 4 == 0) && (y % 100 != 0) || (y % 400 == 0));
}

const uint16_t days_before_month[12] = { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 };

timeunix_t time_tounix(Time *time) {
  uint64_t days = 0;
  for (uint32_t y = 1970; y < time->year; y++) {
    days += time_isleap(y) ? 366 : 365;
  }

  days += days_before_month[time->month - 1];

  if (time->month > 2 && time_isleap(time->year)) {
    days += 1;
  }

  days += time->day - 1;

  uint64_t secs = days * 86400;
  secs += time->hour * 3600;
  secs += time->minute * 60;
  secs += time->second;
  return secs;
}