const uint8_t CLK = 4;
const uint8_t DT = 5;
const uint8_t SW = 6;

const uint8_t TRIAC = 2;
const uint8_t ZCD = 10;
const uint8_t POTENTIOMETER_PIN = A0;

int Waktu_Delay = 9500;

uint8_t lastCLK = HIGH;
uint8_t change = 1;

unsigned long lastDebounceTime = 0;
const uint16_t debounceDelay = 3;

static uint8_t lastZCD = LOW;

void setup() {
  pinMode(ZCD, INPUT);
  pinMode(TRIAC, OUTPUT);
  pinMode(POTENTIOMETER_PIN, INPUT);

  pinMode(CLK, INPUT_PULLUP);
  pinMode(DT, INPUT_PULLUP);
  pinMode(SW, INPUT_PULLUP);

  Serial.begin(9600);
  while (!Serial);

  lastCLK = digitalRead(CLK);
  lastZCD = digitalRead(ZCD);

  Serial.println("💡 AC Dimmer Mulai | Mode: 1=Rotary, 2=Potentiomater");
  Serial.println(" Waktu delay dalam microseconds ");
  Serial.println("");

    digitalWrite(TRIAC, HIGH);
    delay(3000);
    digitalWrite(TRIAC, LOW);


}

void loop() {
  if (digitalRead(SW) == LOW) {
    delay(50);
    while (digitalRead(SW) == LOW);
    
    change++;
    if (change > 2) change = 1;

    Serial.print("🔄Mode: ");
    Serial.println(change);

    if (change == 1) {
      lastCLK = digitalRead(CLK);
    }
  }

  if (change == 2) {
    int raw = analogRead(POTENTIOMETER_PIN);
    Waktu_Delay = map(raw, 0, 1023, 500, 9500);
    Waktu_Delay = constrain(Waktu_Delay, 500, 9500);
  }
  else if (change == 1) {
    unsigned long currentTime = millis();

    if (currentTime - lastDebounceTime >= debounceDelay) {
      uint8_t clk = digitalRead(CLK);
      uint8_t dt = digitalRead(DT);

      if (clk != lastCLK && clk == HIGH) {
        if (dt == HIGH) {
          Waktu_Delay += 1000;
          Serial.println("⟲ CCW | Gelap");
        } else {
          Waktu_Delay -= 1000;          
          Serial.println("⟳ CW | Terang");
        }
        Waktu_Delay = constrain(Waktu_Delay, 500, 9500);
        Serial.print("→ Waktu_Delay = ");
        Serial.println(Waktu_Delay);
      }

      lastCLK = clk;
      lastDebounceTime = currentTime;
    }
  }

  uint8_t zcdNow = digitalRead(ZCD);

  // if (zcdNow == HIGH && lastZCD == LOW) {
  if (zcdNow == HIGH) {
    delayMicroseconds(Waktu_Delay);

    digitalWrite(TRIAC, HIGH);
    delayMicroseconds(10);
    digitalWrite(TRIAC, LOW);
  }

  lastZCD = zcdNow;
}