// Salman Taş 20191701044
// Define the input and outputs
#define PB1 2
#define PB2 3
#define LED 6

// State change detection bool values
bool pb1 = 0;
bool pb2 = 0;
bool pb1_last = 0;
bool pb2_last = 0;

int brightness = 0; // global brightness variable

void setup() {
  // Put your setup code here, to run once:
  // Set the I/O
  pinMode(PB1, INPUT);
  pinMode(PB2, INPUT);
  pinMode(LED, OUTPUT);

  // Start serial communication
  Serial.begin(9600);
}

int modifyBrightness(bool increment) {
  if (increment && brightness < 255) 
  {
    brightness = min(brightness + 10, 255); // Increase brightness up to 255
    return 0;
  } 
  else if (!increment && brightness > 0) 
  {
    brightness = max(brightness - 10, 0); // Decrease brightness up to 0
    return 0;
  }
  return brightness;
}

void loop() {
  // Put your main code here, to run repeatedly:

  // Nested if statements used to avoid unwanted button press
  pb1 = digitalRead(PB1);
  if (pb1 != pb1_last) {
    if (pb1) {
      // Increase the brightness only once per button press
      modifyBrightness(true); // call the func with true
      analogWrite(LED, brightness); // aply brigtness 
      //serial output
      Serial.print("Brightness: ");
      Serial.println(brightness);
    }
    pb1_last = pb1;
  }

  pb2 = digitalRead(PB2);
  if (pb2 != pb2_last) {
    if (pb2) {
      // Decrease the brightness only once per button press
      modifyBrightness(false); // call the func with false
      analogWrite(LED, brightness); // apply brightness
      //serial output
      Serial.print("Brightness: ");
      Serial.println(brightness);
    }
    pb2_last = pb2;
  }
}


// when I open the bounce effect my code increments 9 times
// even I use state change detection
// currently, the bounce effect is closed
// I couldn't figure it out