const int buttonPin = 18;  // Button pin
const int ledPin = 5;      // LED pin
const int potPin = 34;     // Potentiometer pin
const int ldrPin = 35;     // LDR pin

bool ledState = false;

void setup() {
  pinMode(buttonPin, INPUT_PULLDOWN);
  pinMode(ledPin, OUTPUT);
  
  Serial.begin(115200);
}

void loop() {
  static bool lastButtonState = HIGH;
  bool buttonState = digitalRead(buttonPin);

  // Toggle LED state when button is pressed
  if (buttonState == HIGH && lastButtonState == LOW) {
    ledState = !ledState;
    delay(200); // Debounce delay
  }
  lastButtonState = buttonState;

  // Read potentiometer for brightness control
  int potValue = analogRead(potPin);
  int brightness = map(potValue, 0, 4095, 0, 255);

  // Read LDR for automatic night mode
  int ldrValue = analogRead(ldrPin);
  int ldrbrightness = map(ldrValue, 0, 4095, 0, 255);
  bool nightMode = (ldrValue < 1500); // Threshold for darkness

  // Control LED behavior
  if (ledState) {
    analogWrite(ledPin, 255);  // Full brightness in darkness
  }
  else {
    analogWrite(ledPin, 0);
  }
  
  if (ledState && !nightMode && !brightness) {
    analogWrite(ledPin, ledState ? ldrbrightness : 0);
  }
  else if (ledState && nightMode && brightness) {
    analogWrite(ledPin, ledState ? brightness : 0);
  }
  else {
    analogWrite(ledPin, 0);
  }
  
 // for potentiometer
  
  

  // Display values on Serial Monitor
  Serial.print("Button: "); Serial.print(ledState ? "ON" : "OFF");
  Serial.print(" | Potentiometer: "); Serial.print(potValue);
  Serial.print(" | Brightness: "); Serial.print(brightness);
  Serial.print(" | LDR: "); Serial.println(ldrbrightness);
  
  delay(100);
}