const int buttonPin = 7;
const int relayPin = 8;

int buttonState = 0;
int lastButtonState = 1;  // Stores PREVIOUS button state
int relayState = 0;       // 0 = OFF, 1 = ON - for latching

void setup() {
  pinMode(buttonPin, INPUT_PULLUP);
  pinMode(relayPin, OUTPUT);
  digitalWrite(relayPin, HIGH);  // Relay OFF at startup
  Serial.begin(9600);
}

void loop() {
  buttonState = digitalRead(buttonPin);

  // Only act on the MOMENT button is first pressed
  // Not while it's held down
  if (buttonState == LOW && lastButtonState == HIGH) {
    
    if (relayState == 0) {
      // Currently OFF → turn ON
      digitalWrite(relayPin, LOW);
      relayState = 1;
      Serial.println("Status: RELAY ON — LED ON");
    } else {
      // Currently ON → turn OFF
      digitalWrite(relayPin, HIGH);
      relayState = 0;
      Serial.println("Status: RELAY OFF — LED OFF");
    }
  }

  lastButtonState = buttonState;  // Remember this state for next loop
  
  Serial.print("Button: ");
  Serial.print(buttonState);
  Serial.print(" | Relay State: ");
  Serial.println(relayState);
  
  delay(50);  // Shorter delay for responsive debouncing
}