// Pin definitions
int pirPin = 5;
int ldrPin = 34;

int led1 = 18;
int led2 = 19;
int led3 = 21;

int motion = 0;
int lightValue = 0;

unsigned long lastMotionTime = 0;
int delayTime = 5000;

void setup() {
  pinMode(pirPin, INPUT);

  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);

  Serial.begin(115200);
}

void loop() {
  motion = digitalRead(pirPin);
  lightValue = analogRead(ldrPin);

  Serial.print("Light: ");
  Serial.print(lightValue);
  Serial.print(" | Motion: ");
  Serial.println(motion);

  // 🌙 DARK
  if (lightValue > 2000) {

    if (motion == HIGH) {
      lastMotionTime = millis();

      // 🚶 FULL brightness (clear difference)
      analogWrite(led1, 255);
      analogWrite(led2, 255);
      analogWrite(led3, 255);
    }

    else if (millis() - lastMotionTime < delayTime) {
      // stay ON
      analogWrite(led1, 255);
      analogWrite(led2, 255);
      analogWrite(led3, 255);
    }

    else {
      // 🌃 VERY DIM (visible difference)
      analogWrite(led1, 5);
      analogWrite(led2, 5);
      analogWrite(led3, 5);
    }

  } 
  else {
    // ☀️ DAY → FORCE OFF
    analogWrite(led1, 0);
    analogWrite(led2, 0);
    analogWrite(led3, 0);
  }

  delay(100);
}