#define ENCODER_CLK 10
#define ENCODER_DT  11
#define ENCODER_BTN 23

int counter = 0;
volatile int state = 0;

// void IRAM_ATTR readEncoder() {
//   int dtValue = digitalRead(ENCODER_DT);
//   if (dtValue == HIGH) {
//     Serial.println("Rotated clockwise");
//   }
//   if (dtValue == LOW) {
//     Serial.println("Rotated counterclockwise ⏪");
//   }
// }

void IRAM_ATTR readEncoder() {
  int dtValue = digitalRead(ENCODER_DT);
  if (dtValue == HIGH) {
    counter++; // Clockwise
    state = 1;
  }
  if (dtValue == LOW) {
    counter--; // Counterclockwise

    state = 1;
  }
}

// Get the counter value, disabling interrupts.
// This make sure readEncoder() doesn't change the value
// while we're reading it.
int getCounter() {
  int result;
  noInterrupts();
  result = counter;
  interrupts();
  return result;
}

void setup() {
  Serial.begin(115200);
  pinMode(ENCODER_CLK, INPUT);
  pinMode(ENCODER_DT, INPUT);

  pinMode(ENCODER_BTN, INPUT_PULLUP);
  pinMode(LED_BUILTIN, OUTPUT);

  attachInterrupt(digitalPinToInterrupt(ENCODER_CLK), readEncoder, FALLING);
}

//int lastClk = HIGH;

void loop() {
  // int newClk = digitalRead(ENCODER_CLK);
  // if (newClk != lastClk) {
  //   // There was a change on the CLK pin
  //   lastClk = newClk;
  //   int dtValue = digitalRead(ENCODER_DT);
  //   if (newClk == LOW && dtValue == HIGH) {
  //     Serial.println("Rotated clockwise ⏩");
  //   }
  //   if (newClk == LOW && dtValue == LOW) {
  //     Serial.println("Rotated counterclockwise ⏪");
  //   }
  // }

  if (state == 1){
    state = 0;
    Serial.println(getCounter());
  }

  if (digitalRead(ENCODER_BTN) == LOW) {
    digitalWrite(LED_BUILTIN, HIGH);
  } else {
    digitalWrite(LED_BUILTIN, LOW);
  }
}