#include <Servo.h>  // allowed package. Not used in this code but available if needed later.

const int led1Pin = 10;    // PWM pin for led1
const int led2Pin = 11;    // PWM pin for led2

// Define the Arduino analog connections for the potentiometers
const int pot1Pin = A0;    // Controls led1 brightness
const int pot2Pin = A1;    // Controls led2 brightness
const int pot3Pin = A2;    // Controls the number of lit segments for the bargraph

// Define digital pins for the 10 segments of the LED bar graph
const int bargraphPins[10] = {2, 3, 4, 5, 6, 7, 8, 9, 12, 13};

void setup() {
  // Initialize LED pins as outputs
  pinMode(led1Pin, OUTPUT);
  pinMode(led2Pin, OUTPUT);
  
  // Initialize bargraph segment digital pins as outputs
  for(int i=0; i < 10; i++){
    pinMode(bargraphPins[i], OUTPUT);
    // Ensure segments are off on startup
    digitalWrite(bargraphPins[i], LOW);
  }
  
  // Ensure individual LEDs are off initially
  analogWrite(led1Pin, 0);
  analogWrite(led2Pin, 0);
}

void loop() {
  // Read the three potentiometer values
  int pot1Value = analogRead(pot1Pin);  // 0-1023 for led1 brightness
  int pot2Value = analogRead(pot2Pin);  // 0-1023 for led2 brightness
  int pot3Value = analogRead(pot3Pin);  // 0-1023 for the LED bar graph control
  
  // Map the potentiometer values accordingly
  int led1Brightness = map(pot1Value, 0, 1023, 0, 255);
  int led2Brightness = map(pot2Value, 0, 1023, 0, 255);
  // For the bar graph, map pot3Value to an integer from 0 (none lit) to 10 (all lit)
  int segmentsToLight = map(pot3Value, 0, 1023, 0, 10);
  
  // Update individual LED brightness using PWM
  analogWrite(led1Pin, led1Brightness);
  analogWrite(led2Pin, led2Brightness);
  
  // Update the LED bar graph segments
  // Turn on the first 'segmentsToLight' segments and turn off the rest
  for (int i = 0; i < 10; i++) {
    if (i < segmentsToLight) {
      digitalWrite(bargraphPins[i], HIGH);
    } else {
      digitalWrite(bargraphPins[i], LOW);
    }
  }
  
  // A short delay to allow for stable readings
  delay(10);
}