#include <Wire.h>
#include <RTClib.h>
#include <LiquidCrystal_I2C.h>

RTC_DS1307 rtc;
LiquidCrystal_I2C lcd(0x27, 16, 2); // Adjust the address if needed
const int buzzerPin = 8;
unsigned long previousMillis = 0;
const long interval = 10000; // 10 seconds
bool showDate = true;

void setup() {
  Wire.begin();
  rtc.begin();
  lcd.begin(16, 2); // Initialize the LCD with 16 columns and 2 rows
  lcd.backlight();
  pinMode(buzzerPin, OUTPUT);

  if (!rtc.isrunning()) {
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }

  Serial.begin(9600);
}

void loop() {
  DateTime now = rtc.now();
  int hour = now.hour();
  String period = "AM";

  if (hour >= 12) {
    period = "PM";
    if (hour > 12) {
      hour -= 12;
    }
  } else if (hour == 0) {
    hour = 12;
  }

  lcd.setCursor(0, 0);
  lcd.print("Time: ");
  lcd.print(hour);
  lcd.print(':');
  lcd.print(now.minute());
  lcd.print(':');
  lcd.print(now.second());
  lcd.setCursor(14, 0); // Set cursor to the 15th position
  lcd.print(period);

  unsigned long currentMillis = millis();
  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;
    showDate = !showDate;

    lcd.setCursor(0, 1);
    lcd.print("                "); // Clear the second row

    if (showDate) {
      lcd.setCursor(0, 1);
      lcd.print("Date: ");
      lcd.print(now.day());
      lcd.print('/');
      lcd.print(now.month());
      lcd.print('/');
      lcd.print(now.year());
    } else {
      lcd.setCursor(0, 1);
      lcd.print("DAY: ");
      lcd.print(dayOfWeek(now.dayOfTheWeek()));
    }
  }

  if (now.hour() == 5 && now.minute() == 0 && now.second() == 0) {
    if (now.dayOfTheWeek() >= 1 && now.dayOfTheWeek() <= 5) {
      triggerAlarm();
    }
  }

  delay(1000);
}

void triggerAlarm() {
  Serial.println("Alarm! It's 5 AM!");
  for (int i = 0; i < 10; i++) { // Buzzer sounds for 10 seconds
    digitalWrite(buzzerPin, HIGH);
    delay(10000);
    digitalWrite(buzzerPin, LOW);
    delay(10000);
  }
}

String dayOfWeek(int day) {
  switch (day) {
    case 0: return "LINGGO";
    case 1: return "LUNES";
    case 2: return "MARTES";
    case 3: return "MIYERKULES";
    case 4: return "HUWEBES";
    case 5: return "BIYERNES";
    case 6: return "SABADO";
    default: return "";
  }
}