#include <LedControl.h>
#include <LiquidCrystal_I2C.h>

#define DATA_IN 11
#define CLK 13
#define CS 10
#define BUTTON_PIN 2 

LedControl lc = LedControl(DATA_IN, CLK, CS, 1);
LiquidCrystal_I2C lcd(0x27, 20, 4);  

int bstate = 0;
int lastbstate = 1;
bool animation = false;
unsigned long msg = 0;
const unsigned long duration = 5000;

const byte heart1[8] = {
  B00000000,
  B01100110,
  B11111111,
  B11111111,
  B11111111,
  B01111110,
  B00111100,
  B00011000
};

const byte heart2[8] = {
  B01100110,
  B11111111,
  B11111111,
  B11111111,
  B01111110,
  B00111100,
  B00011000,
  B00000000
};

void setup() {
  lc.shutdown(0, false);
  lc.setIntensity(0, 5); 
  lc.clearDisplay(0);

  lcd.begin(20, 4);
  lcd.backlight();
  lcd.clear();

  pinMode(BUTTON_PIN, INPUT_PULLUP);
}

void loop() {
  bstate = digitalRead(BUTTON_PIN);

  if (bstate == LOW && lastbstate == HIGH) {
    animation = true; 


    lcd.clear();
    lcd.setCursor(2, 0);
    lcd.print("Happy 14 months");
    lcd.setCursor(0, 1);
    lcd.print("to us, baby! I love");
    lcd.setCursor(0, 2);
    lcd.print("you so so much! lets");
    lcd.setCursor(0, 3);
    lcd.print("enjoy our day, oki?");

    msg = millis();
  }
  
  lastbstate = bstate;

  if (animation) {
    displayHeart(heart1);
    delay(300);
    displayHeart(heart2);
    delay(300);
    
    if (millis() - msg >= duration) {
      lcd.clear(); 
      animation = false; 
      lc.clearDisplay(0);
    }
  }
}

void displayHeart(const byte heart[]) {
  for (int row = 0; row < 8; row++) {
    lc.setRow(0, row, heart[row]);
  }
}