#include <MD_Parola.h>
#include <MD_MAX72xx.h>
#include <SPI.h>
#include <RTClib.h>

#define HARDWARE_TYPE MD_MAX72XX::FC16_HW

#define MAX_DEVICES 6
#define CS_PIN_UTC 10
#define CS_PIN_LOCAL 9

MD_Parola led_utc = MD_Parola(HARDWARE_TYPE, CS_PIN_UTC, MAX_DEVICES);
MD_Parola led_local = MD_Parola(HARDWARE_TYPE, CS_PIN_LOCAL, MAX_DEVICES);

RTC_DS1307 rtc;

void setup() {
    led_utc.begin();
    led_utc.setIntensity(0);
    led_utc.displayClear();
    led_utc.setTextAlignment(PA_CENTER);

    led_local.begin();
    led_local.setIntensity(0);
    led_local.displayClear();
    led_local.setTextAlignment(PA_CENTER);

    rtc.begin();
}

void loop() {
    DateTime now = rtc.now();

    // Format UTC time with leading zeros
    String utcTime = String(now.hour() - 7) + ":" +
                     (now.minute() < 10 ? "0" : "") + String(now.minute()) + ":" +
                     (now.second() < 10 ? "0" : "") + String(now.second()) + "Z";

    // Format local time with leading zeros
    String localTime = String(now.hour()) + ":" +
                       (now.minute() < 10 ? "0" : "") + String(now.minute()) + ":" +
                       (now.second() < 10 ? "0" : "") + String(now.second());

    // Display UTC time
    led_utc.print(utcTime);

    // Display local time
    led_local.print(localTime);

    delay(100);
}