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

RTC_DS1307 RTC;

LiquidCrystal_I2C lcd(0x27, 16, 2);  // Alamat I2C LCD dan jumlah kolom dan baris

int ledPin = 8;
int buzzerPin = 7;
int tombolNaik = 1;
int tombolTurun = 2;

void setup() {
  lcd.init();                     // Menghidupkan lcd
  lcd.backlight();                // Menghidupkan lampu lcd
  lcd.setCursor(0,0);
  lcd.print("  Sensor Lampu");
  lcd.setCursor(0,1);
  lcd.print("   Jam Digital");

  delay(2000);
  RTC.begin();

  pinMode(ledPin, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
  pinMode(tombolNaik, INPUT_PULLUP);
  pinMode(tombolTurun, INPUT_PULLUP);
}

void loop() {
  lcd.clear();
  DateTime now=RTC.now();
  int naik = digitalRead((tombolNaik));
  int turun = digitalRead((tombolTurun));

  int tahun = now.year();
  int bulan = now.month();
  int hari = now.day();

  int jam = now.hour(); // 0-23
  int menit = now.minute(); // 0-59
  int detik = now.second(); //0-59



  if (naik == LOW) {
    // Untuk atur jam manual
    jam++;
    // menit = 39;
    // detik = 58;
    RTC.adjust(DateTime(tahun,bulan,hari,jam,menit,detik));
  }
  if (turun == LOW) {
    jam--;
    RTC.adjust(DateTime(tahun,bulan,hari,jam,menit,detik));
  }

  // ALARM SHALAT
  lcd.setCursor(0,1);
  if(jam == 4 && menit == 40){
    replay();
    lcd.setCursor(0,1);
    lcd.print("    Subuh");
    delay(1000);
  }else if(jam == 12 && menit == 2){
    replay();
    lcd.setCursor(0,1);
    lcd.print("    Zhuhur");
    delay(1000);
  }else if(jam == 15 && menit == 20){
    replay();
    lcd.setCursor(0,1);
    lcd.print("    Ashar");
    delay(1000);
  }else if(jam == 18 && menit == 2){
    replay();
    lcd.setCursor(0,1);
    lcd.print("    Maghrib");
    delay(1000);
  }else if(jam == 19 && menit == 12){
    replay();
    lcd.setCursor(0,1);
    lcd.print("    'isya");
    delay(1000);
  }else{
    noTone(buzzerPin);
    lcd.setCursor(0,1);
    if (jam > 17 || jam < 7){
      digitalWrite(ledPin, HIGH);
      lcd.print("    Malam");
    }else{
      digitalWrite(ledPin, LOW);
      lcd.print("    Siang");
    }
  }

  // Menampilkan Jam
  lcd.setCursor(0,0); lcd.print("JAM: ");
  if (jam < 10) {
    lcd.print("0");
  }
  lcd.print(jam); lcd.print(":");
  if (menit < 10) {
    lcd.print("0");
  }
  lcd.print(menit);lcd.print(":");
  if (detik < 10) {
    lcd.print("0");
  }
  lcd.print(detik);



  delay(900); // Berikan sedikit delay untuk stabilitas
}

// fungsi untuk mengulang buzzer
void replay(){
  for(int i = 0; i < 5;i++){
    tone(buzzerPin, 1000);
    delay(300);
    noTone(buzzerPin);
  }
}