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

// LCD 20x4 alamat default 0x27
LiquidCrystal_I2C lcd(0x27, 20, 4);

struct Lyric {
  const char* text;         // isi lirik
  unsigned long startDelay; // kapan mulai tampil (ms)
  unsigned int speed;       // kecepatan ketik per karakter (ms)
};

Lyric lyrics[] = {
  {"janganlah kau tinggalkan diri ku", 300, 100},
  {"tak kan mampu menghadapi semua", 4500, 100},
  {"hanya bersamamu ku akan bisa", 9300, 110},
  {"kau adalah darah ku", 14100, 100},
  {"kau adalah jantungku", 18800, 100},
  {"kau adalah hidupku lengkapi diriku", 23000, 100},
  {"oh sayangku kau begitu", 28000, 100},
  {"sempurnaaaaaaaaaaaaa", 34500, 100}
};

int totalLyrics = sizeof(lyrics) / sizeof(lyrics[0]);

unsigned long startTime;
int currentLine = 0;
int charIndex = 0;
bool finished = false;

void setup() {
  lcd.init();
  lcd.backlight();
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Simulasi Lirik");
  delay(2000);
  lcd.clear();
  startTime = millis();
}

void loop() {
  if (finished) return;

  unsigned long now = millis();

  if (currentLine < totalLyrics) {
    Lyric line = lyrics[currentLine];

    // Tunggu sampai waktunya tampil
    if (now - startTime >= line.startDelay) {
      // Efek ketik per karakter
      if (charIndex < strlen(line.text)) {
        lcd.print(line.text[charIndex]);
        charIndex++;
        delay(line.speed);
      } else {
        // Setelah selesai 1 baris, lanjut ke baris berikutnya
        delay(1000);
        lcd.clear();
        charIndex = 0;
        currentLine++;
      }
    }
  } else {
    lcd.clear();
    lcd.setCursor(0, 1);
    lcd.print("Akhir Lirik!");
    finished = true;
  }
}