#include <GyverButton.h>

#define BTN_PIN 3

bool blinkFlag = 0, alarmFlag = 0, spectatorFlag = 0;
int sensor_in = 7, alarm_pin = 13, sensor_dat = 0, duration_pin = 0, duration_time = 0, duration_block = 0, led_spec_pin = 12, led_standby_pin = 10, buttonFlag = 0;
unsigned long timer1, timerBlink;

GButton button(BTN_PIN);

void setup()
{

  pinMode(A0, INPUT);
  pinMode(sensor_in, INPUT);
  pinMode(alarm_pin, OUTPUT);
  pinMode(led_spec_pin, OUTPUT);
  pinMode(led_standby_pin, OUTPUT);
}

void loop()
{

  button.tick();
  sensor_dat = digitalRead(sensor_in);
  duration_pin = analogRead(A0);
  duration_time = map(duration_pin, 0, 1023, 2000, 10000);

  if (button.isClick() && !alarmFlag && buttonFlag == 0)
  {
    duration_block = duration_time;
    spectatorFlag = 1;
    digitalWrite(led_spec_pin, HIGH);
    digitalWrite(led_standby_pin, LOW);
    buttonFlag = 1;
    timer1 = millis();
  }
  else if (button.isClick() && buttonFlag == 1)
  {
    alarmFlag = 0;
    buttonFlag = 0;
    spectatorFlag = 0;
    digitalWrite(led_spec_pin, LOW);
  }

  if (spectatorFlag && millis() - timer1 > duration_block)
  {
    alarmFlag = 1;
  }
  else if (!sensor_dat)
  {
    timer1 = millis();
  }

  if (alarmFlag)
  {
    digitalWrite(alarm_pin, blinkFlag);
    digitalWrite(led_spec_pin, LOW);
  }

  if (millis() - timerBlink > 350)
  {
    blinkFlag = !blinkFlag;
    timerBlink = millis();
  }

  else if (!spectatorFlag)
  {
    digitalWrite(alarm_pin, LOW);
    digitalWrite(led_standby_pin, HIGH);
  }
}