#include <TM1637Display.h>


// Countdown Timer
const unsigned long COUNTDOWN_TIME = 45; // 5 minutes in seconds


// Pins for TM1637 display module
#define CLK_PIN 2
#define DIO_PIN 3
#define start_pin 13;

static boolean pause = 1;
unsigned long speeder = 1000;
int seconds = 0;
int minutes = 0;
static int counter = 0;

unsigned long startTime;
unsigned long currentTime;
unsigned long elapsedTime;
bool timerStarted = false;

TM1637Display display(CLK_PIN, DIO_PIN);

void reset_countdown()
{
  print_serial("Countdown reset\n");
  seconds = 0;
  minutes = 0;
  pause = true;
  speeder = 1000;
  last_alarm = -1;
}

void setup() {
  Serial.begin(9600);
  pinMode(start_pin, INPUT_PULLUP);

  display.setBrightness(7); // Set the brightness of the display (0-7)
  display.clear(); // Clear the display

  reset_countdown();
  Serial.println("Ready\n");

  startTime = millis(); // Record the starting time
}


void loop() {
 if (digitalRead(BTN_START) == LOW) {
  timerStarted=1;
 }
  currentTime = millis(); // Get the current time
  elapsedTime = (currentTime - startTime) / 1000; // Calculate elapsed time in seconds


  if (elapsedTime <= COUNTDOWN_TIME) {
    unsigned long remainingTime = COUNTDOWN_TIME - elapsedTime;


    // Display remaining time in Minutes:Seconds format
    unsigned int minutes = remainingTime / 60;
    unsigned int seconds = remainingTime % 60;
    display.showNumberDecEx(minutes * 100 + seconds, 0b01000000, true);


    if (remainingTime == 0) {
      // Start blinking when countdown reaches 00:00
      while (true) {
        display.showNumberDecEx(0, 0b01000000, true); // Display "00:00"
        delay(500);
        display.clear(); // Clear the display
        delay(500);
      }
    }
  }

 
  delay(100); // Wait for 1 second
}