#include "stopwatch.h"

#define SW_DURATION 600
#define MAIN_DELAY 100

#define BUTTON_PIN 4

bool btn_locked = false;

void display_sw() {
    char *sw = sw_display();
    Serial.print("Remaining: ");
    Serial.println(sw);
}

void setup() {
  Serial.begin(115200);
  Serial.println("Press the button to start ...");

  pinMode(BUTTON_PIN, INPUT_PULLUP);

  sw_init(SW_DURATION);
  display_sw();
}

void loop() {
  int value = digitalRead((BUTTON_PIN));
  if (btn_locked && value == HIGH) {
    btn_locked = false;
  } else if (!btn_locked) {
    if (value == LOW) {
      btn_locked = true;
      if (!sw_is_running()) {
        sw_start();
      } else {
        sw_pause();
      }
    }
  }

  if (sw_update()) {
    display_sw();
  }

  delay(MAIN_DELAY);
}