#ifndef MICROPY_INCLUDED_LIB_TIMEUTILS_TIMEUTILS_H

#define MICROPY_INCLUDED_LIB_TIMEUTILS_TIMEUTILS_H

#define TIMEUTILS_SECONDS_1970_TO_2000 (946684800ULL)

typedef struct _timeutils_struct_time_t {

} timeutils_struct_time_t;

bool timeutils_is_leap_year(mp_uint_t year);

mp_uint_t timeutils_days_in_month(mp_uint_t year, mp_uint_t month);

mp_uint_t timeutils_year_day(mp_uint_t year, mp_uint_t month, mp_uint_t date);

void timeutils_seconds_since_2000_to_struct_time(mp_uint_t t,

timeutils_struct_time_t *tm);

mp_uint_t timeutils_seconds_since_2000(mp_uint_t year, mp_uint_t month,

mp_uint_t date, mp_uint_t hour, mp_uint_t minute, mp_uint_t second);

mp_uint_t timeutils_mktime_2000(mp_uint_t year, mp_int_t month, mp_int_t mday,

mp_int_t hours, mp_int_t minutes, mp_int_t seconds);

#if MICROPY_EPOCH_IS_1970

static inline void timeutils_seconds_since_epoch_to_struct_time(uint64_t t, timeutils_struct_time_t *tm) {

// TODO this will give incorrect results for dates before 2000/1/1

return timeutils_seconds_since_2000_to_struct_time(t - TIMEUTILS_SECONDS_1970_TO_2000, tm);

}

static inline uint64_t timeutils_mktime(mp_uint_t year, mp_int_t month, mp_int_t mday, mp_int_t hours, mp_int_t minutes, mp_int_t seconds) {

return timeutils_mktime_2000(year, month, mday, hours, minutes, seconds) + TIMEUTILS_SECONDS_1970_TO_2000;

}

static inline uint64_t timeutils_seconds_since_epoch(mp_uint_t year, mp_uint_t month,

mp_uint_t date, mp_uint_t hour, mp_uint_t minute, mp_uint_t second) {

return timeutils_seconds_since_2000(year, month, date, hour, minute, second) + TIMEUTILS_SECONDS_1970_TO_2000;

}

static inline mp_uint_t timeutils_seconds_since_epoch_from_nanoseconds_since_1970(uint64_t ns) {

return ns / 1000000000ULL;

}

static inline uint64_t timeutils_nanoseconds_since_epoch_to_nanoseconds_since_1970(uint64_t ns) {

return ns;

}

#else // Epoch is 2000

#define timeutils_seconds_since_epoch_to_struct_time timeutils_seconds_since_2000_to_struct_time

#define timeutils_seconds_since_epoch timeutils_seconds_since_2000

#define timeutils_mktime timeutils_mktime_2000

static inline uint64_t timeutils_seconds_since_epoch_to_nanoseconds_since_1970(mp_uint_t s) {

return ((uint64_t)s + TIMEUTILS_SECONDS_1970_TO_2000) * 1000000000ULL;

}

static inline mp_uint_t timeutils_seconds_since_epoch_from_nanoseconds_since_1970(uint64_t ns) {

return ns / 1000000000ULL - TIMEUTILS_SECONDS_1970_TO_2000;

}

static inline int64_t timeutils_nanoseconds_since_epoch_to_nanoseconds_since_1970(int64_t ns) {

return ns + TIMEUTILS_SECONDS_1970_TO_2000 * 1000000000ULL;

}

int timeutils_calc_weekday(int y, int m, int d);

#endif // MICROPY_INCLUDED_LIB_TIMEUTILS_TIMEUTILS_H