#include "RTClib.h"

RTC_DS1307 rtc;

enum DaysOfTheWeek {
  Sunday,
  Monday,
  Tuesday,
  Wednesday,
  Thursday,
  Friday,
  Saturday
};

void setup() {
  Serial.begin(115200);

  if (!rtc.begin()) {
    Serial.println("Failed to find RTC");
    Serial.flush();
    abort();
  }
}

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

  printCurrentTime(now);

  Serial.println();
  delay(3000);
}

void printCurrentTime(DateTime now) {
  Serial.print("Current time: ");
  Serial.print(now.year(), DEC);
  Serial.print('/');
  Serial.print(now.month(), DEC);
  Serial.print('/');
  Serial.print(now.day(), DEC);
  Serial.print(" (");
  Serial.print(getDayOfWeekString(now.dayOfTheWeek()));
  Serial.print(") ");
  Serial.print(now.hour(), DEC);
  Serial.print(':');
  Serial.print(now.minute(), DEC);
  Serial.print(':');
  Serial.print(now.second(), DEC);
  Serial.println();
}

String getDayOfWeekString(int dayOfWeek) {
  switch (dayOfWeek) {
    case Sunday:
      return "Sunday";
    case Monday:
      return "Monday";
    case Tuesday:
      return "Tuesday";
    case Wednesday:
      return "Wednesday";
    case Thursday:
      return "Thursday";
    case Friday:
      return "Friday";
    case Saturday:
      return "Saturday";
    default:
      return "Invalid day";
  }
}