// Include the LiquidCrystal library for controlling LCD displays
#include <LiquidCrystal.h>

// Define LCD connections (replace with your actual pin connections)
LiquidCrystal lcd(13, 12, 11, 10, 9, 8);

// Variable to store the button press count
int counter = 0;

void setup() {
  // Set all pins on port D as inputs with internal pull-up resistors
  for (int i = 0; i < 8; i++) {
    // Make pin i an input (DDRD &= ~(1<<i))
    DDRD &= ~(1 << i);
    // Enable pull-up resistor on pin i (PORTD |= 1<<i)
    PORTD |= (1 << i);
  }

  // Initialize the LCD with 16 columns and 2 rows
  lcd.begin(16, 2);
}

void loop() {
  // Call function to read button states and update counter
  zisti();

  // Display message based on the button press count
  if (counter > 4) {
    // Set cursor to position (0, 0) on the LCD
    lcd.setCursor(0, 0);
    // Print "viac ako 4" (more than 4)
    lcd.println("viac ako 4");
    // Set cursor to position (0, 1) on the LCD
    lcd.setCursor(0, 1);
    // Print the counter value
    lcd.println(counter);
  } else if (counter == 4) {
    // Set cursor to position (0, 0) on the LCD
    lcd.setCursor(0, 0);
    // Print "polka" (half)
    lcd.println("polka");
    // Set cursor to position (0, 1) on the LCD
    lcd.setCursor(0, 1);
    // Print the counter value
    lcd.println(counter);
  } else if (counter < 4) {
    // Set cursor to position (0, 0) on the LCD
    lcd.setCursor(0, 0);
    // Print "menej ako 4" (less than 4)
    lcd.println("menej ako 4");
    // Set cursor to position (0, 1) on the LCD
    lcd.setCursor(0, 1);
    // Print the counter value
    lcd.println(counter);
  }
}

void zisti() {
  // Reset the counter to 0
  counter = 0;

  for (int i = 0; i < 8; i++) {
    // Check if the button connected to pin i is pressed (LOW reading)
    if ((PIND & (1 << i)) == LOW) {
      // Increment the counter if a button is pressed
      counter++;
    }
  }
}