const int greenLed1 = 2;
const int amberLed1 = 3;
const int redLed1 = 4;
const int pirSensor1 = 7;
const int button1 = 5; // Push button for Lane 1

const int greenLed2 = 9;
const int amberLed2 = 10;
const int redLed2 = 11;
const int pirSensor2 = 8;
const int button2 = 6; // Push button for Lane 2

const int potentiometer = A0; // Analog pin for variable resistor
const int delayRange = 20000; // 20 seconds maximum delay

void setup() {
  pinMode(greenLed1, OUTPUT);
  pinMode(amberLed1, OUTPUT);
  pinMode(redLed1, OUTPUT);
  pinMode(pirSensor1, INPUT);
  pinMode(button1, INPUT_PULLUP);

  pinMode(greenLed2, OUTPUT);
  pinMode(amberLed2, OUTPUT);
  pinMode(redLed2, OUTPUT);
  pinMode(pirSensor2, INPUT);
  pinMode(button2, INPUT_PULLUP);

  pinMode(potentiometer, INPUT);

  Serial.begin(9600);
}

void loop() {
  int delayTime = map(analogRead(potentiometer), 0, 1023, 5000, delayRange);
  
  if (digitalRead(button1) == LOW || detectMotion(pirSensor1)) {
    // Lane 1 is active
    debugMessage("Lane 1 active");
    setLights(greenLed1, amberLed1, redLed1, delayTime);
  } else if (digitalRead(button2) == LOW || detectMotion(pirSensor2)) {
    // Lane 2 is active
    debugMessage("Lane 2 active");
    setLights(greenLed2, amberLed2, redLed2, delayTime);
  }
}

void setLights(int green, int amber, int red, int delayTime) {
  // Red to red/amber transition
  digitalWrite(red, HIGH);
  delay(10000); // Red delay set to 10 seconds

  // Amber delay
  digitalWrite(red, LOW); // Turn off red
  digitalWrite(amber, HIGH);
  delay(3000); // Amber delay set to 3 seconds

  // Green delay
  digitalWrite(amber, LOW); // Turn off amber
  digitalWrite(green, HIGH);
  delay(20000); // Green delay set to 20 seconds

  while (detectMotion(pirSensor1) || detectMotion(pirSensor2) || digitalRead(button1) == LOW || digitalRead(button2) == LOW) {
    // Wait for the other lane to clear or press button 
    debugMessage("Waiting for other lane to clear or press button ");
    delay(1000);
  }
  
  // Reset lights for the next cycle
  digitalWrite(amber, LOW);
  digitalWrite(red, LOW);
  digitalWrite(green, LOW);
  debugMessage("Lights reset");
}

bool detectMotion(int pirSensor) {
  return digitalRead(pirSensor) == HIGH;
}

void debugMessage(String message) {
  Serial.println(message);
}