// simple project using Arduino UNO and Matrix LED Display MAX7219 with u8g2 library
// and RTC (real time clock) module to display time

// created by upir, 2023

//test

#include <Arduino.h>
#include <RTClib.h>
#include <TM1637.h>

RTC_DS1307 rtc; // set the real time clock module

//U8G2_MAX7219_32X8_F_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 11, /* data=*/ 12, /* cs=*/ 10, /* dc=*/ U8X8_PIN_NONE, /* reset=*/ U8X8_PIN_NONE);
const int CLK = 12;
const int DIO = 11;

TM1637 tm(CLK, DIO);

char time_string[30]; // string to hold the current time to be displayed

void setup(void) {

  Serial.begin(9600);

  pinMode(4, OUTPUT); // we are using pin 4 to power the real time clock module, 
  digitalWrite(4, HIGH); // since the +5V pin is already used for the display
  pinMode(7, INPUT_PULLUP);

  tm.init();
  tm.set(BRIGHT_TYPICAL);

  if (! rtc.begin()) { // start the RTC module
    abort();
  }

  // following line sets the RTC to the date & time this sketch was compiled
  // uncomment this when uploading to Arduino, otherwise the time will be 0:00 and not increasing
  //rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));

  
}

int getTime(DateTime time){
  uint32_t  unix = time.unixtime() + 946684800;
  
  sprintf(time_string, "unix: %d\n", unix);
  Serial.print(time_string);

  double jdn = unix / double(86400.0) + 2440587.5;
	double jsn = ((jdn - 2308805.27785) / 1.0274912517) - 0.000185185185185185 - 122349.0;
	int jsn_floor = int(jsn);

  int marsClock = (jsn - (double)jsn_floor) * 100000;

  sprintf(time_string, "jsn: %d\n", jsn);
  Serial.print(time_string);
  return marsClock;
}

void loop(void) {
  DateTime now = rtc.now(); // get current time

  int currTime = getTime(now);

  //unsigned long unixMilli = ((now.unixtime() + 946684800) * 1000 + milli_sec);

  //sprintf(time_string, "currTime: %d\n", currTime);
  //Serial.print(time_string);

  int HourDis = now.hour(); //currTime[0]; //now.hour();
  int MinuteDis = now.minute(); //currTime[1]; //now.minute();

  if (digitalRead(7) == LOW) { // pressed da button
      HourDis = now.day();
      MinuteDis = now.month();
  }

  tm.display(0, (HourDis / 10) % 10);
  tm.display(1, HourDis % 10);
  tm.display(2, (MinuteDis / 10) % 10);
  tm.display(3, MinuteDis % 10);

  delay(1000); // wait 0.1 second
}