// Pin Definitions
int speaker = 11;           // Digital Pin 11 for Buzzer (Speaker)
int potentiometerPin = A0;  // Analog Pin A0 for Potentiometer

// LED Pins
int led_blue  = 2; // Digital Pin 2 (Blue LED)
int led_green = 3; // Digital Pin 3 (Green LED)
int led_red   = 4; // Digital Pin 4 (Red LED)

// Frequency Range for the Buzzer
int minFrequency = 30000;  // Minimum frequency (500 Hz)
int maxFrequency = 60000; // Maximum frequency (5000 Hz)

// RGB Indicator setup
int withRGB = 1; // 1 = true (RGB LEDs active), 0 = false

void setup() {
  // Set up the LEDs and speaker as OUTPUTs
  pinMode(speaker, OUTPUT);
  pinMode(led_blue, OUTPUT);
  pinMode(led_green, OUTPUT);
  pinMode(led_red, OUTPUT);

  // Run initialization LED test if withRGB is enabled
  if (withRGB == 1) {
    initTesting();
  } else {
    speakerTest();
  }
}

void loop() {
  // Read the potentiometer value (0 to 1023)
  int potValue = analogRead(potentiometerPin);

  // Map the potentiometer value to the frequency range (500Hz to 5000Hz)
  int frequency = map(potValue, 0, 1023, minFrequency, maxFrequency);

  // Set the buzzer tone based on the mapped frequency
  tone(speaker, frequency);

  // Handle the RGB indicators (blinking if enabled)
  if (withRGB == 1) {
    blinkyIndicator();
  }
}

// Function to test the speaker with different tones
void speakerTest() {
  tone(speaker, 600);
  delay(1000);
  tone(speaker, 700);
  delay(1000);
}

// Function to perform an initial test with the RGB LEDs
void initTesting() {
  digitalWrite(led_blue, HIGH);
  delay(100);
  digitalWrite(led_blue, LOW);
  delay(100);
  digitalWrite(led_green, HIGH);
  delay(100);
  digitalWrite(led_green, LOW);
  delay(100);
  digitalWrite(led_red, HIGH);
  delay(100);
  digitalWrite(led_red, LOW);
  delay(500);
  digitalWrite(led_blue, HIGH);
  delay(2000);
  tone(speaker, 600);  // Test sound
  digitalWrite(led_blue, LOW);
  delay(1000);
  digitalWrite(led_green, HIGH);
  delay(2000);
  tone(speaker, 700);  // Last test sound
  digitalWrite(led_green, LOW);
  delay(50);
  digitalWrite(led_green, HIGH);
  delay(50);
  digitalWrite(led_green, LOW);
  delay(50);
  digitalWrite(led_green, HIGH);
  delay(50);
  digitalWrite(led_green, LOW);
}

// Function to blink the RGB LEDs for feedback
void blinkyIndicator() {
  // Blue LED blinking
  digitalWrite(led_blue, HIGH);
  delay(100);
  digitalWrite(led_blue, LOW);
  delay(1000);

  // Green LED blinking
  digitalWrite(led_green, HIGH);
  delay(50);
  digitalWrite(led_green, LOW);
  delay(20);
  digitalWrite(led_green, HIGH);
  delay(50);
  digitalWrite(led_green, LOW);
  delay(1000);

  // Red LED blinking
  digitalWrite(led_red, HIGH);
  delay(50);
  digitalWrite(led_red, LOW);
  delay(5000);
}