int LedPin1 = 22;
int LedPin2 = 23;
int LedPin3 = 21;
int LedPin4 = 17;
int pinBouton = 34;

int etat = 0;
int dernierEtatBouton = HIGH;

const char* indicateurAlerte(int etat) {
  digitalWrite(LedPin1, LOW);
  digitalWrite(LedPin2, LOW);
  digitalWrite(LedPin3, LOW);
  digitalWrite(LedPin4, LOW);

  switch (etat) {
    case 0:
      digitalWrite(LedPin1, HIGH);
      return "Alerte : Systeme normal";
    case 1:
      digitalWrite(LedPin2, HIGH);
      return "Alerte : Surveillance active";
    case 2:
      digitalWrite(LedPin3, HIGH);
      return "Alerte : Intrusion detectee";
    case 3:
      digitalWrite(LedPin4, HIGH);
      return "Alerte : Evenement urgent";
  }
}

void setup() {
  pinMode(LedPin1, OUTPUT);
  pinMode(LedPin2, OUTPUT);
  pinMode(LedPin3, OUTPUT);
  pinMode(LedPin4, OUTPUT);
  pinMode(pinBouton, INPUT_PULLUP);
  Serial.begin(9600);

  const char* message = indicateurAlerte(0);
  Serial.println(message);
}

void loop() {
  int etatBouton = digitalRead(pinBouton);

  if (etatBouton == LOW && dernierEtatBouton == HIGH) {
    delay(50);

   
    if (digitalRead(pinBouton) == LOW) {
      etat = (etat + 1) % 4;
      const char* message = indicateurAlerte(etat);
      Serial.println(message);
      delay(300); 
    }
  }

  dernierEtatBouton = etatBouton;
}