// --- Pin Map ---
#define TRIG_PIN A0
#define ECHO_PIN A1

#define BTN1_PIN 12   // button 1
#define LED1_PIN 7    // LED 1

#define BTN2_PIN 13   // button 2
#define LED2_PIN 6    // LED 2

const int US_THRESHOLD_CM = 20;
const unsigned long PRINT_MS = 1000;
unsigned long lastPrint = 0;

// --- Ultrasonic distance ---
long readDistanceCm() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);

  long duration = pulseIn(ECHO_PIN, HIGH, 30000UL);
  if (duration == 0) return 9999;
  return duration * 0.034 / 2;
}

void setup() {
  Serial.begin(9600);

  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);

  pinMode(BTN1_PIN, INPUT);   // use simple INPUT like your example
  pinMode(BTN2_PIN, INPUT);

  pinMode(LED1_PIN, OUTPUT);
  pinMode(LED2_PIN, OUTPUT);

  digitalWrite(LED1_PIN, LOW);
  digitalWrite(LED2_PIN, LOW);
}

void loop() {
  // --- Ultrasonic ---
  long distance = readDistanceCm();
  int actionUS = (distance <= US_THRESHOLD_CM) ? 1 : 0;

  // --- Button reads ---
  bool btn1Pressed = (digitalRead(BTN1_PIN) == HIGH);
  bool btn2Pressed = (digitalRead(BTN2_PIN) == HIGH);

  // --- LED control ---
  if (btn1Pressed) {
    digitalWrite(LED1_PIN, HIGH);
  } else {
    digitalWrite(LED1_PIN, LOW);
  }

  if (btn2Pressed) {
    digitalWrite(LED2_PIN, HIGH);
  } else {
    digitalWrite(LED2_PIN, LOW);
  }

  // --- Action flags ---
  int actionLED1 = btn1Pressed ? 1 : 0;
  int actionLED2 = btn2Pressed ? 1 : 0;

  // --- Print once per second ---
  unsigned long now = millis();
  if (now - lastPrint >= PRINT_MS) {
    lastPrint = now;
    Serial.print("Action one US  : "); Serial.println(actionUS);
    Serial.print("Action two LD1 : "); Serial.println(actionLED1);
    Serial.print("Action three LD2 : "); Serial.println(actionLED2);
    Serial.println("-----------------------");
  }
}