#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include "pitches.h"

// Inisialisasi LCD I2C
LiquidCrystal_I2C lcd(0x27, 16, 2);  // Alamat I2C 0x27 untuk LCD 16x2

// Inisialisasi pin tombol dan buzzer
const int buttonPin = 9;
const int buzzerPin = 8;
bool isPlaying = false;

// Not-not untuk lagu Happy Birthday
int melody[] = {
  NOTE_G4, NOTE_G4, NOTE_A4, NOTE_G4, NOTE_C5, NOTE_B4,
  NOTE_G4, NOTE_G4, NOTE_A4, NOTE_G4, NOTE_D5, NOTE_C5,
  NOTE_G4, NOTE_G4, NOTE_G5, NOTE_E5, NOTE_C5, NOTE_B4, NOTE_A4,
  NOTE_F5, NOTE_F5, NOTE_E5, NOTE_C5, NOTE_D5, NOTE_C5
};

int noteDurations[] = {
  4, 4, 4, 4, 4, 2,
  4, 4, 4, 4, 4, 2,
  4, 4, 4, 4, 4, 4, 2,
  4, 4, 4, 4, 4, 2
};

// Kecepatan teks bergulir (dalam milidetik)
int scrollSpeed = 200;

void setup() {
  lcd.begin(16, 2);  // Inisialisasi LCD dengan 16 kolom dan 2 baris
  lcd.backlight();
  pinMode(buttonPin, INPUT);
  pinMode(buzzerPin, OUTPUT);
  lcd.print("Switch ON to play");
  delay(2000); // Tampilkan pesan awal selama 2 detik
}

void loop() {
  isPlaying = digitalRead(buttonPin) == HIGH;

  if (isPlaying) {
    playHappyBirthday();
  } else {
    noTone(buzzerPin); // Matikan buzzer jika switch OFF
  }

  // Teks bergulir
  scrollText("Happy Birthday!", 16, scrollSpeed);
}

void playHappyBirthday() {
  for (int thisNote = 0; thisNote < 26; thisNote++) {
    if (!isPlaying) {
      noTone(buzzerPin);
      return;
    }
    int noteDuration = 1000 / noteDurations[thisNote];
    tone(buzzerPin, melody[thisNote], noteDuration);
    int pauseBetweenNotes = noteDuration * 1.30;
    delay(pauseBetweenNotes);
    noTone(buzzerPin);  // Matikan buzzer setelah setiap nada
    delay(10);  // Beri jeda kecil untuk menghindari overlap nada
  }
}

void scrollText(String message, int displayLength, int speed) {
  for (int i = 0; i < message.length() + displayLength; i++) {
    lcd.setCursor(0, 1);
    String displayText = "";

    for (int j = 0; j < displayLength; j++) {
      if (i + j < message.length()) {
        displayText += message[i + j];
      } else {
        displayText += " ";
      }
    }

    lcd.print(displayText);
    delay(speed);
  }
}