#include "Arduino.h"
#include <TM1637Display.h>


const int CLK = 2;  // Define CLK pin for TM1637 display
const int DIO = 3;  // Define DIO pin for TM1637 display
const int ledPin = 13;  // Define LED pin
const int buzzerPin = 8;  // Define Buzzer pin
const int buttonPin = 7;  // Define Button pin

TM1637Display display(CLK, DIO);

int countdown = 30;  // Initial countdown value in seconds
bool countdownActive = false;

void setup() {
  pinMode(ledPin, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
  pinMode(buttonPin, INPUT_PULLUP);
  
  display.setBrightness(0x0a);  // Set the brightness of the display (0x00 to 0x0f)
}

void loop() {
  if (digitalRead(buttonPin) == LOW && !countdownActive) {
    countdownActive = true;
    startCountdown();
  }

  if (countdownActive) {
    updateDisplay();
    delay(1000);  // Update every second
  }
}

void startCountdown() {
  for (int i = countdown; i >= 0; i--) {
    countdown = i;
    updateDisplay();
    delay(1000);
    
    if (i == 0) {
      digitalWrite(ledPin, HIGH);  // Turn on LED at pin 13
      activateBuzzer();
      delay(3000);  // Buzzer and LED on for 3 seconds
      digitalWrite(ledPin, LOW);  // Turn off LED
      deactivateBuzzer();
      countdownActive = false;
    }
  }
}

void updateDisplay() {
  int minutes = countdown / 60;
  int seconds = countdown % 60;
  
  display.showNumberDecEx((minutes * 100) + seconds, 0b11100000, true);
}

void activateBuzzer() {
  tone(buzzerPin, 1000);  // Activate the buzzer with a frequency of 1000 Hz
}

void deactivateBuzzer() {
  noTone(buzzerPin);  // Turn off the buzzer
}