// Definisi pin
const int tombol1Pin = 2;
const int tombol2Pin = 3;
const int tombol3Pin = 4;
const int buzzerPin = 9;
const int ledPin = 13;

// Variabel status
bool statusAlarm = false;

// Timer untuk batas waktu 1 menit
unsigned long startTime = 0;
const unsigned long timeLimit = 60000; // 1 menit dalam milidetik

// Timer untuk mengendalikan nyala/mati buzzer dan LED
unsigned long previousMillis = 0;
const unsigned long buzzerOnTime = 1000; // Buzzer nyala selama 1 detik
const unsigned long buzzerOffTime = 500; // Buzzer mati selama 0,5 detik

// Variabel untuk melacak status buzzer dan LED
bool buzzerState = false;
bool ledState = false;
bool resetalarm = true;


void setup() {
  Serial.begin(9600);
  // Inisialisasi pin
  pinMode(tombol1Pin, INPUT_PULLUP);
  pinMode(tombol2Pin, INPUT_PULLUP);
  pinMode(tombol3Pin, INPUT_PULLUP);
  pinMode(buzzerPin, OUTPUT);
  pinMode(ledPin, OUTPUT);
  
  // Mulai dengan mematikan buzzer dan LED
  digitalWrite(buzzerPin, LOW);
  digitalWrite(ledPin, LOW);
}

void loop() {
  // Baca status tombol
  bool sb1 = digitalRead(tombol1Pin);
  bool sb2 = digitalRead(tombol2Pin);
  bool sb3 = digitalRead(tombol3Pin);


  unsigned long currentMillis = millis();

  // Jika tombol 1 ditekan, set status alarm ke true
  if (sb3 == 0){
    resetalarm = false;
  }
     
  if (sb1 == 0) {
    statusAlarm = true;
    // Mulai timer jika belum dimulai
    if (startTime == 0) {
      startTime = currentMillis;
    }
  }
if (resetalarm == false){
  // Jika status alarm true dan belum lebih dari 1 menit
  if (statusAlarm && (currentMillis - startTime < timeLimit)) {
    // Mengendalikan nyala/mati buzzer dan LED tanpa delay
    if (buzzerState) {
      if (currentMillis - previousMillis >= buzzerOnTime) {
        buzzerState = false;
        previousMillis = currentMillis;
        //digitalWrite(buzzerPin, LOW);
        //digitalWrite(ledPin, LOW);
      }
    } else {
      if (currentMillis - previousMillis >= buzzerOffTime) {
        buzzerState = true;
        previousMillis = currentMillis;
        //digitalWrite(buzzerPin, HIGH);
        //digitalWrite(ledPin, HIGH);
        Serial.println("buzzer on");

      }
    }
  } else {
    // Jika sudah lebih dari 1 menit, buzzer dan LED mati
    digitalWrite(buzzerPin, LOW);
    digitalWrite(ledPin, LOW);
    Serial.println("alarm di matikan karna sudha lewat 20 menit");
    buzzerState = false;
    
  }}

  // Reset timer dan status alarm jika tombol 2 ditekan
  if (sb2 == 0) {
    startTime = 0;
    statusAlarm = false;
    resetalarm = true;
  }
  //Serial.println(statusAlarm);
  delay(10);
}