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

// Inisialisasi RTC dan LCD
RTC_DS3231 rtc;
LiquidCrystal_I2C lcd(0x27, 20, 4); // Alamat I2C LCD

// Definisi nada
#define C4 262
#define CS4 277
#define D4 294
#define E4 330
#define F4 349
#define G4 392
#define A4 440
#define AS4 466
#define B4 494
#define C5 523 // Nada bel (C5) yang tinggi
#define D5 587
#define E5 659
#define F5 698
#define G5 784
#define A5 880
#define B5 988 // Nada yang lebih tinggi

// Melodi Indonesia Raya
int indoRayaMelody[] = { 
    C4, D4, E4, C5, 0, C5, AS4, AS4, G4, E4, 0, E4, E4, F4, E4, D4,
    C4, B4, 0, B4, C4, D4, AS4, 0, AS4, G4, G4, F4, E4, 0, E4, E4,
    G4, F4, E4, D4, C4, 0, C4, D4, E4, C5, 0, C5, AS4, AS4, G4, E4,
    0, E4, E4, F4, E4, G4, AS4, G4, F4, E4, E4, E4, C5, C5, B4, AS4,
    G4, E4, 0, E4, E4, F4, E4, D4, 0, C4, D4, E4, C5, 0, C5,
    AS4, AS4, G4, E4, 0, E4, E4, F4, E4, D4, 0, C4, C4, D4, C4, 0
};

int indoRayaDurations[] = { 
    468, 156, 624, 624, 468, 156, 468, 156, 624, 624, 624, 468, 156, 624, 624, 
    624, 624, 1248, 624, 468, 156, 624, 624, 468, 156, 468, 156, 624, 624, 
    624, 468, 156, 624, 624, 624, 624, 1248, 624, 468, 156, 624, 624, 468, 
    156, 468, 156, 624, 624, 624, 468, 156, 624, 624, 624, 624, 1248, 624, 
    468, 156, 624, 624, 624, 624, 1248, 624, 468, 156, 624, 624, 624, 624, 
    1248, 624, 468, 156, 624, 468, 156, 624, 468, 156, 624, 468, 156, 624, 
    468, 156, 624, 468, 156, 1248, 624, 468, 156, 624, 468, 156, 624, 
    468, 156, 624, 468, 156, 624, 468, 156, 624, 468, 156, 1248, 1248,
    0 
};

// Melodi Tanah Airku
int tanahAirkuMelody[] = {
    0, G4, E4, F4, G4, C5, E5, D5, C5, B4, A4, G4,
    0, G4, C5, E5, D5, C5, B4, B4, A4, B4, C5,
    0, C5, C5, B4, A4, A4, C5, B4, A4, G4,
    0, E4, F4, G4, B4, A4, A4, D4, E4, F4, E4,
    0, G4, C5, B4, A4, A4, D5, E5, F5,
    A4, G4, C5, B4, D5, C5 
};

int tanahAirkuDurations[] = {
    500, 250, 250, 250, 500, 
    1000, 250, 250, 250, 250, 
    500, 0, 500, 250, 250, 
    500, 0, 500, 250, 250, 
    250, 250, 500, 0, 
    500, 250, 250, 250, 
    250, 500, 0, 
    500, 250, 250, 
    0
};

unsigned long previousMillis = 0; // Untuk penghitungan waktu
bool isPlayingBell = false;
bool isPlayingMelody = false;
int currentNote = 0;
int currentMelody = 0;

void setup() {
    pinMode(11, OUTPUT); // Pin untuk speaker
    rtc.begin(); // Memulai RTC
    lcd.begin(20, 4); // Memulai LCD
    lcd.backlight(); // Menyalakan backlight LCD

    // Jika RTC kehilangan daya, atur waktu pada saat kompilasi
    if (rtc.lostPower()) {
        rtc.adjust(DateTime(F(__DATE__), F(__TIME__))); // Mengatur waktu RTC
    }

    // Tampilkan nama di LCD
    lcd.setCursor(0, 0);
    lcd.print("Nama: Vika Septia");
}

void loop() {
    DateTime now = rtc.now();

    // Tampilkan jam di LCD
    lcd.setCursor(0, 1);
    lcd.print("Jam: ");
    lcd.print(now.hour());
    lcd.print(":");
    if (now.minute() < 10) lcd.print("0"); // Tambahkan nol di depan jika perlu
    lcd.print(now.minute());

    // Jam 06:30 - Bel Masuk Sekolah
    if (now.hour() == 6 && now.minute() == 30 && !isPlayingBell) {
        isPlayingBell = true;
        lcd.setCursor(0, 2);
        lcd.print("Bel Masuk Sekolah");
        playBell();
    }

    // Jam 07:00 - Lagu: Indonesia Raya
    if (now.hour() == 7 && now.minute() == 0 && !isPlayingMelody) {
        currentMelody = 1; // Menandakan Indonesia Raya
        isPlayingMelody = true;
        currentNote = 0; // Reset nada
        previousMillis = millis(); // Atur waktu awal
        lcd.setCursor(0, 3);
        lcd.print("Main: Indonesia Raya");
        if (indoRayaMelody[currentNote] > 0) {
            tone(11, indoRayaMelody[currentNote]); // Mainkan nada pertama
        }
    }

    // Jam 14:50 - Bel Pulang Sekolah
    if (now.hour() == 14 && now.minute() == 50 && !isPlayingBell) {
        isPlayingBell = true;
        lcd.setCursor(0, 2);
        lcd.print("Bel Pulang Sekolah");
        playBell();
    }

    // Jam 14:53 - Lagu: Tanah Airku
    if (now.hour() == 14 && now.minute() == 53 && !isPlayingMelody) {
        currentMelody = 2; // Menandakan Tanah Airku
        isPlayingMelody = true;
        currentNote = 0; // Reset nada
        previousMillis = millis(); // Atur waktu awal
        lcd.setCursor(0, 3);
        lcd.print("Main: Tanah Airku");
        if (tanahAirkuMelody[currentNote] > 0) {
            tone(11, tanahAirkuMelody[currentNote]); // Mainkan nada pertama
        }
    }

    // Memainkan nada secara non-blocking
    unsigned long currentMillis = millis();
    if (isPlayingMelody) {
        int duration = (currentMelody == 1) ? indoRayaDurations[currentNote] : tanahAirkuDurations[currentNote];
        if (currentMillis - previousMillis >= duration) {
            previousMillis = currentMillis;

            // Hentikan nada sebelumnya
            noTone(11);

            // Pindah ke nada berikutnya
            currentNote++;
            if (currentMelody == 1 && currentNote >= sizeof(indoRayaMelody) / sizeof(indoRayaMelody[0])) {
                isPlayingMelody = false; // Selesai memainkan melodi
                currentNote = 0; // Reset untuk pemutaran berikutnya
            } else if (currentMelody == 2 && currentNote >= sizeof(tanahAirkuMelody) / sizeof(tanahAirkuMelody[0])) {
                isPlayingMelody = false; // Selesai memainkan melodi
                currentNote = 0; // Reset untuk pemutaran berikutnya
            } else {
                // Mainkan nada baru
                if ((currentMelody == 1 && indoRayaMelody[currentNote] > 0) || (currentMelody == 2 && tanahAirkuMelody[currentNote] > 0)) {
                    tone(11, (currentMelody == 1 ? indoRayaMelody[currentNote] : tanahAirkuMelody[currentNote]));
                }
            }
        }
    }

    // Memainkan bel secara non-blocking
    if (isPlayingBell) {
        // Durasi bel selama 1000 ms
        if (currentMillis - previousMillis >= 1000) {
            noTone(11);
            isPlayingBell = false; // Selesai membunyikan bel
        }
    }
}

void playBell() {
    tone(11, C5, 1000); // Nada bel (C5) selama 1000 ms
    delay(100); // Tambahkan delay kecil untuk memberikan efek
    tone(11, B5, 1000); // Nada tambahan (B5) selama 1000 ms
}