#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define BUZZER_PIN 27

// Create an SSD1306 display object
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

// Updated "Happy Birthday" melody with correct structure
int melody[] = {
  262, 262, 294, 262, 349, 330,  // "Happy birthday to you"
  262, 262, 294, 262, 349, 330,  // "Happy birthday to you" (repeated)
  
  262, 262, 523, 440, 349,       // "Happy birthday"
  466, 466, 440, 349, 392, 349,  // "Happy birthday"
  
  262, 262, 294, 262, 349, 330,  // "Happy birthday to you"
  262, 262, 294, 262, 349, 330   // "Happy birthday to you" (final part)
};

// Duration for each note (4 = quarter note)
int noteDurations[] = {
  4, 4, 8, 8, 8, 4, 
  4, 4, 8, 8, 8, 4, 
  
  4, 4, 8, 8, 16, 
  4, 4, 8, 8, 8, 
  
  4, 4, 8, 8, 8, 8, 20, 
  4, 4, 8, 8, 8, 16
};


void setup() {
  // Initialize OLED display
 if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
  Serial.println(F("SSD1306 allocation failed"));
  for (;;);  // Stay here if initialization fails
}
  display.clearDisplay();
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(0, 10);
  display.println("HBD KE 21");
  display.println("SANIA");
  display.display();

  // Initialize buzzer
  pinMode(BUZZER_PIN, OUTPUT);
  
  delay(2000); // Show text for 2 seconds before playing melody
}

void loop() {
  // Play Happy Birthday melody
  for (int i = 0; i < 25; i++) {
    int noteDuration = 1000 / noteDurations[i];
    tone(BUZZER_PIN, melody[i], noteDuration); // Play tone
    delay(noteDuration * 1.3); // Delay between notes
    noTone(BUZZER_PIN); // Stop tone after duration
  }
  delay(5000); // Wait before repeating the melody
}