#include <TM1637.h>

const int CLK = 2;
const int DIO = 3;
const int buttonPinStart = 4;
const int buttonPinStop = 5;
const int buttonReset = 6;
int lastButtonState;
int lastTimeButtonStateChanged = 0;
unsigned long lastDebounceTime = 0;
unsigned int counter = 0;
int buttonState;
int sw = 0;
long time;
int StateReset = LOW;
TM1637 tm(CLK, DIO);

void setup() {
  tm.init();
  tm.set(BRIGHT_TYPICAL);

  tm.point(1);
  pinMode(buttonPinStart, INPUT);
  pinMode(buttonPinStop, INPUT);
  pinMode(buttonReset, INPUT);
}

void debounceStart(int pin) {
    byte buttonState = digitalRead(pin);
    if (buttonState != lastButtonState) {
      lastTimeButtonStateChanged = millis();
      lastButtonState = buttonState;
      if (buttonState == HIGH) {
        if (sw == 0) {
          sw = 1;
          time = millis();
        } 
      }
    }
  }


void debounceStop(int pin) {
    byte buttonState = digitalRead(pin);
    if (buttonState != lastButtonState) {
      lastTimeButtonStateChanged = millis();
      lastButtonState = buttonState;
      if (buttonState == HIGH) {
        if (sw == 1) {
          sw = 0;
        }
      }
    }
  }


void debounceReset(int pin) {
  byte StateReset = digitalRead(pin);
  if (StateReset == HIGH) {
    Serial.println("Resetted");
    return;
  }
}

void loop() {
  debounceStart(buttonPinStart);
  debounceStop(buttonPinStop);
  debounceReset(buttonReset);
  tm.display(0, (counter / (10 * 10 * 10)) % 10);
  tm.display(1, (counter / (10 * 10)) % 10);
  tm.display(2, (counter / 10) % 10);
  tm.display(3, counter % 10);
  if (sw == 1) {
    if ((millis() - time) >= 10) {
      counter++;
      time = millis();
    }
  }
  if (counter == 10 * 10 * 10 * 10) {
    counter = 0;
  }
}