#include <Servo.h>

// Define pin assignments
const int servoPin = 7;    // PWM digital pin for servo control
const int ledPin   = 2;    // PWM digital pin for LED brightness
const int pot1Pin  = A0;   // Potentiometer 1 -> Servo target position
const int pot2Pin  = A1;   // Potentiometer 2 -> LED brightness
const int pot3Pin  = A2;   // Potentiometer 3 -> Servo speed

Servo myServo;
int currentAngle = 0;  // Track the current position of the servo

void setup() {
  // Attach the servo to its PWM pin
  myServo.attach(servoPin);
  
  // Initialize servo to starting position
  currentAngle = 90;  // start at mid-position (optional, can be 0)
  myServo.write(currentAngle);
  
  // Set LED pin as output
  pinMode(ledPin, OUTPUT);
}

void loop() {
  // Read the potentiometers:
  int pot1Value = analogRead(pot1Pin);  // controls servo angle target (0-1023)
  int pot2Value = analogRead(pot2Pin);  // controls LED brightness (0-1023)
  int pot3Value = analogRead(pot3Pin);  // controls servo step delay (0-1023)
  
  // Map pot1 value to servo angle (0 to 180 degrees)
  int targetAngle = map(pot1Value, 0, 1023, 0, 180);
  
  // Map pot2 value to LED brightness (0 to 255)
  int brightness = map(pot2Value, 0, 1023, 0, 255);
  
  // Map pot3 value to delay (10 to 100 milliseconds) controlling servo speed
  int delayTime = map(pot3Value, 0, 1023, 10, 100);

  // Update LED brightness
  analogWrite(ledPin, brightness);

  // Smooth servo movement: move one degree at a time toward the target
  if(currentAngle < targetAngle){
    currentAngle++; 
    myServo.write(currentAngle);
    delay(delayTime);
  }
  else if(currentAngle > targetAngle){
    currentAngle--;
    myServo.write(currentAngle);
    delay(delayTime);
  }
  
  // If at the target, small delay before next reading
  else {
    delay(10);
  }
}