// Pin definitions
const int SWITCH_PIN = 14;
const int LED_SWITCH_PIN = 15;
const int BUTTON_PIN = 12;
const int LED_BUTTON_PIN = 13;
const int POT_PIN = A0; // GPIO 26 (ADC0)
const int LED_POT_PIN = 11;

// Constants
const unsigned long DEBOUNCE_MS = 50; // Debounce time for button
const int ADC_MAX = 1023; // 10-bit ADC resolution in Arduino (Wokwi)
const int PWM_MAX = 255; // PWM range for LED brightness

// Variables for button debouncing
unsigned long last_button_time = 0;
bool last_button_reading = HIGH; // Default HIGH due to INPUT_PULLUP
bool button_state = HIGH;
bool led_button_state = LOW; // Tracks button LED state

void setup() {
 // Initialize serial for debugging
 Serial.begin(115200);

 // Initialize pins
 pinMode(SWITCH_PIN, INPUT_PULLUP); // Switch with internal pull-up
 pinMode(LED_SWITCH_PIN, OUTPUT); // Switch LED
 pinMode(BUTTON_PIN, INPUT_PULLUP); // Button with internal pull-up
 pinMode(LED_BUTTON_PIN, OUTPUT); // Button LED
 pinMode(POT_PIN, INPUT); // Potentiometer (ADC)
 pinMode(LED_POT_PIN, OUTPUT); // Potentiometer LED (PWM)
}

void loop() {
 // Read switch state and control its LED
 int switch_state = digitalRead(SWITCH_PIN);
 digitalWrite(LED_SWITCH_PIN, switch_state); // LED ON when switch OFF (HIGH)

 // Read button state (with non-blocking debouncing)
 bool current_button = digitalRead(BUTTON_PIN);
 if (current_button != last_button_reading && (millis() - last_button_time) >= DEBOUNCE_MS) {
 if (current_button == LOW) { // Button pressed (LOW due to INPUT_PULLUP)
 led_button_state = !led_button_state; // Toggle LED state
 digitalWrite(LED_BUTTON_PIN, led_button_state);
 last_button_time = millis();
 }
 }
 last_button_reading = current_button;

 // Read potentiometer and control LED brightness
 int pot_value = analogRead(POT_PIN); // Read ADC (0 to 1023)
 int brightness = pot_value / (ADC_MAX / PWM_MAX); // Scale to PWM range (0-255)
 analogWrite(LED_POT_PIN, brightness);

 // Debug output
  Serial.print("Pot Value: ");
  Serial.print(pot_value);
  Serial.print(" | Brightness: ");
  Serial.println(brightness);
  delay(100); // Slow down serial output for readability
}