#include <cstdint>
#include <iostream>

typedef struct {
    uint8_t Second;         /* seconds */
    uint8_t Minute;         /* minutes */
    uint8_t Hour;        /* hours */
    uint8_t Day;        /* day of the month */
    uint8_t Month;         /* month */
    int16_t Year;        /* year ofset from 1970*/
    uint8_t Wday;        /* day of the week */
    uint8_t Yday;        /* day in the year */
    uint8_t IsDST;       /* daylight saving time */

    uint32_t unixtime;   /* seconds since 01.01.1970 00:00:00 UTC*/
} ts;

enum Wday_e {Sun = 1, Mon, Tue, Wed, Thu, Fri, Sat};

// leap year calculator expects year argument as years offset from 1970
#define LEAP_YEAR(Y)     ( ((1970+(Y))>0) && !((1970+(Y))%4) && ( ((1970+(Y))%100) || !((1970+(Y))%400) ) )

// to transform a number of seconds into a current time you need to do some maths
#define NUMBEROFSECONDSPERDAY 86400UL
#define NUMBEROFSECONDSPERHOUR 3600UL
#define NUMBEROFSECONDSPERMINUTE 60UL

uint8_t IsDST(ts* tm);
void breakTime(uint32_t timeInput, ts *tm);
uint32_t makeTime(ts *tm);
void toTimeZone(ts *utc, ts* local, int8_t timeZone);