struct Button {
    const uint8_t PIN;
    uint32_t numberKeyPresses;
    bool pressed;
};

Button button1 = {18, 0, false};

//variables to keep track of the timing of recent interrupts
unsigned long button_time = 0;  
unsigned long last_button_time = 0; 

void IRAM_ATTR isr() {
    button_time = millis();
if (button_time - last_button_time > 250)
{
        button1.numberKeyPresses++;
        button1.pressed = true;
       last_button_time = button_time;
       if (button1.numberKeyPresses>3){
        button1.numberKeyPresses=1;
       }
}
}

void setup() {
    Serial.begin(115200);
    pinMode(button1.PIN, INPUT_PULLUP);
    attachInterrupt(button1.PIN, isr, FALLING);
}

void loop() {
  /*
    if (button1.pressed) {
        Serial.printf("Button has been pressed %u times\n", button1.numberKeyPresses);
        button1.pressed = false;
    }
    */
  switch (button1.numberKeyPresses) {
  case 1:
    Serial.println("One vaule");
    // statements
    break;
  case 2:
    Serial.println("Two vaule");
    // statements
    break;
  case 3:
    Serial.println("Third vaule");
    break;
  default:
    // statements
    Serial.println("Default vaule");
    //break;
}
}