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

LiquidCrystal_I2C lcd(0x27, 20, 4);

int SPEAKER = 11;
int SWITCH_PIN = 2; // Pin untuk switch
bool isPlaying = true; // Variabel untuk mengetahui apakah melodi sedang dimainkan atau tidak

#define NUM_OF_NOTES 28
int NOTE_SEQ[NUM_OF_NOTES] = {
    NOTE_C5, NOTE_C5, NOTE_D5, NOTE_C5, NOTE_F5, NOTE_E5,
    NOTE_C5, NOTE_C5, NOTE_D5, NOTE_C5, NOTE_G5, NOTE_F5,
    NOTE_C5, NOTE_C5, NOTE_C6, NOTE_A5, NOTE_F5, NOTE_E5, NOTE_D5,
    NOTE_AS5, NOTE_AS5, NOTE_A5, NOTE_F5, NOTE_G5, NOTE_F5
};

int NOTE_LEN[NUM_OF_NOTES] = {
    4, 4, 8, 8, 8, 16, 4,
    4, 8, 8, 8, 16, 4, 4,
    8, 8, 8, 8, 12, 6, 8, 12,
    12, 18, 20, 8, 8, 8
};

int TEMPO = 65;

const char* BIRTHDAY_MESSAGES[] = {
    "Selamat ulang tahun!",
    "Semoga panjang umur",
    "Sehat selalu",
    "Sukses selalu",
    "Bahagia selalu",
    "Diberkati selalu",
    "Doa terbaik untukmu",
    "<3"
};

unsigned long lastMessageChangeTime = 0;
const unsigned long messageChangeInterval = 2000; // 2 detik

void playNote(int pitch, int duration) {
    if (isPlaying) {
        tone(SPEAKER, pitch, duration);
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("Happy Birthday");
        lcd.setCursor(0, 1);
        lcd.print(randomMessage());
        delay(duration);
        noTone(SPEAKER);
        lcd.clear();
    }
}

const char* randomMessage() {
    int numMessages = sizeof(BIRTHDAY_MESSAGES) / sizeof(BIRTHDAY_MESSAGES[0]);
    int index = millis() % numMessages;
    return BIRTHDAY_MESSAGES[index];
}

void updateMessage() {
    if (millis() - lastMessageChangeTime >= messageChangeInterval) {
        lcd.setCursor(0, 1);
        lcd.print(randomMessage());
        lastMessageChangeTime = millis();
    }
}

void setup() {
    pinMode(SWITCH_PIN, INPUT_PULLUP); // Set pin sebagai input dengan pull-up resistor
    lcd.init();
    lcd.backlight();
    lcd.setCursor(0, 0);
    lcd.print("Happy Birthday");
    lcd.setCursor(0, 1);
    lcd.print(randomMessage());
}

void loop() {
    if (digitalRead(SWITCH_PIN) == LOW) {
        isPlaying = !isPlaying; // Ubah status pemutaran jika tombol ditekan
        delay(500); // Debouncing, hindari multiple trigger saat tombol ditekan
    }

    if (isPlaying) {
        for (int i = 0; i < NUM_OF_NOTES; i++) {
            playNote(NOTE_SEQ[i], NOTE_LEN[i] * TEMPO);
            updateMessage();
        }
    }
}