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

#define BUZZER_PIN 8
LiquidCrystal_I2C lcd(0x27, 16, 2);

// Nada lagu disederhanakan
int melody[] = {
  330, 330, 392, 440, 392, 330, 294, 330, 0, // "Kau begitu sempurna"
  330, 330, 392, 440, 392, 330, 294, 330, 0, // "Dimataku kau begitu indah"
  330, 330, 392, 440, 392, 330, 294, 330, 0  // "Kau membuat diriku slalu memujamu"
};

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

// Lirik dibagi per 2 baris
String lyrics[] = {
  "Kau begitu", 
  "sempurna",
  "Dimataku kau",
  "begitu indah",
  "Kau buat diriku",
  "slalu memujamu"
};

void setup() {
  lcd.init();
  lcd.backlight();
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Lagu: Sempurna");
  delay(2000);
  lcd.clear();
}

void loop() {
  int totalNotes = sizeof(melody) / sizeof(melody[0]);
  int lyricIndex = 0;

  for (int i = 0; i < totalNotes; i++) {
    // Ganti lirik tiap 9 nada (2 baris sekaligus)
    if (i % 9 == 0 && lyricIndex < (sizeof(lyrics)/sizeof(lyrics[0]) - 1)) {
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print(lyrics[lyricIndex]);
      lcd.setCursor(0, 1);
      lcd.print(lyrics[lyricIndex + 1]);
      lyricIndex += 2;
    }

    int duration = 700 / noteDurations[i]; // LEBIH LAMBAT
    if (melody[i] != 0) {
      tone(BUZZER_PIN, melody[i], duration);
    }
    delay(duration * 1.4); // sedikit jeda lebih panjang
    noTone(BUZZER_PIN);
  }

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Selesai");
  delay(3000);
}