const int sw0 = 25;
const int sw1 = 26;
const int sw2 = 27;

const int led0 = 18;
const int led1 = 17;
const int led2 = 16;

bool ack0 = false;
bool ack1 = false;
bool ack2 = false;

bool out0 = false;
bool out1 = false;
bool out2 = false;


void setup() {
  // put your setup code here, to run once:
  pinMode(sw0, INPUT_PULLUP);
  pinMode(sw1, INPUT_PULLUP);
  pinMode(sw2, INPUT_PULLUP);

  pinMode(led0, OUTPUT);
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);

  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
}

void loop() {
  
  ack0 = !digitalRead(sw0);
  ack1 = !digitalRead(sw1);
  ack2 = !digitalRead(sw2);


  if (!ack0) {
    out0 = false;
    out1 = false;
    out2 = false;
    digitalWrite(led0, LOW);
    digitalWrite(led1, LOW);
    digitalWrite(led2, LOW);
    return;
  }

  if (ack0) {
    out0 = true;
  } else {
    out0 = false;
  }

  if (ack1 && !out2) {
    out1 = true;
    out2 = false;
  } else {
    out1 = false;
  }

  if (ack2 && !out1) {
    out1 = false;
    out2 = true;
  } else {
    out2 = false;
  }

  digitalWrite(led0, out0 ? HIGH : LOW);
  digitalWrite(led1, out1 ? HIGH : LOW);
  digitalWrite(led2, out2 ? HIGH : LOW);


  Serial.print(ack1);
  Serial.print("/");
  Serial.print(ack2);
  Serial.print(" -- ");
  Serial.print(out1);
  Serial.print("/");
  Serial.println(out2);

  delay(100); // this speeds up the simulation
}