// Forum: https://forum.arduino.cc/t/why-is-my-time-slow/1204090
// This Wokwi project: https://wokwi.com/projects/385226419203141633

#include <TimeLib.h>
#include <LiquidCrystal.h>

const int rs = 12;
const int en = 11;
const int d4 = 5;
const int d5 = 4;
const int d6 = 3;
const int d7 = 2;

LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

unsigned long targetTime;
bool momTimeReached = false;  // Flag to track whether "Mom Time!" has been displayed

void setup() {
  // Initialize the LCD
  lcd.begin(16, 2);

  targetTime = now() + (180UL * 24 * 60 * 60);  // 180 days in seconds

  lcd.setCursor(0, 0);
  lcd.print("Countdown Timer");
}

void loop() {
  if (!momTimeReached) {  // Check if "Mom Time!" has not been displayed
    unsigned long currentTime = now();
    unsigned long timeDiff = targetTime - currentTime;

    if (timeDiff > 0) {
      unsigned long days = timeDiff / 86400;
      unsigned long hours = (timeDiff % 86400) / 3600;
      unsigned long minutes = (timeDiff % 3600) / 60;
      unsigned long seconds = timeDiff % 60;

      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("D:");
      lcd.print(days);
      lcd.print(" H:");
      lcd.print(hours);
      lcd.setCursor(0, 1);
      lcd.print("M:");
      lcd.print(minutes);
      lcd.print(" S:");
      lcd.print(seconds);
    } else {
      // If countdown is over
      momTimeReached = true;  // Set the flag to true
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Time Up!");
    }
  }

  delay(1000);  // Update every second
}