// Pin configuration
int LDR = A5;
int passiveBuzzer = 12;
int activeBuzzer = 11;
int redLED1 = 8;
int redLED2 = 7;
int R = 6;
int G = 5;
int B = 3;
int button = 2;

// Variables
int ldrValue = 0;
int colorIndex = 0;
bool lastButtonState = LOW;
unsigned long lastDebounceTime = 0;
unsigned long debounceDelay = 200;

void setup() {
  Serial.begin(9600);

  pinMode(LDR, INPUT);
  pinMode(passiveBuzzer, OUTPUT);
  pinMode(activeBuzzer, OUTPUT);
  pinMode(redLED1, OUTPUT);
  pinMode(redLED2, OUTPUT);
  pinMode(R, OUTPUT);
  pinMode(G, OUTPUT);
  pinMode(B, OUTPUT);
  pinMode(button, INPUT_PULLUP);
}

void loop() {
  // ---- LDR SENSOR SECTION ----
  ldrValue = analogRead(LDR);
  Serial.print("LDR Value: ");
  Serial.println(ldrValue);

  if (ldrValue >= 70 && ldrValue <= 150) {
    analogWrite(redLED1, 255);
    analogWrite(redLED2, 255);
    tone(passiveBuzzer, 550);
  }
  else if (ldrValue >= 160 && ldrValue <= 400) {
    analogWrite(redLED1, 150);
    analogWrite(redLED2, 150);
    tone(passiveBuzzer, 660);
  }
  else if (ldrValue >= 410 && ldrValue <= 550) {
    analogWrite(redLED1, 125);
    analogWrite(redLED2, 125);
    tone(passiveBuzzer, 770);
  }
  else {
    analogWrite(redLED1, 0);
    analogWrite(redLED2, 0);
    noTone(passiveBuzzer);
  }

  // ---- BUTTON AND RGB SECTION ----
  bool buttonState = digitalRead(button);

  if (buttonState == LOW && lastButtonState == HIGH && (millis() - lastDebounceTime) > debounceDelay) {
    lastDebounceTime = millis();
    colorIndex++;
    if (colorIndex > 5) colorIndex = 1;

    // Change RGB color manually
    switch (colorIndex) {
      case 1: // Red
        analogWrite(R, 255); 
        analogWrite(G, 0); 
        analogWrite(B, 0);
        Serial.println("RGB Color: RED");
        break;
      case 2: // Green
        analogWrite(R, 0); 
        analogWrite(G, 255); 
        analogWrite(B, 0);
        Serial.println("RGB Color: GREEN");
        break;
      case 3: // Blue
        analogWrite(R, 0); 
        analogWrite(G, 0);
        analogWrite(B, 255);
        Serial.println("RGB Color: BLUE");
        break;
      case 4: // Yellow
        analogWrite(R, 255); 
        analogWrite(G, 255); 
        analogWrite(B, 0);
        Serial.println("RGB Color: YELLOW");
        break;
      case 5: // Magenta
        analogWrite(R, 255); 
        analogWrite(G, 0); 
        analogWrite(B, 255);
        Serial.println("RGB Color: MAGENTA");
        break;
    }

    // Active buzzer beep
    digitalWrite(activeBuzzer, HIGH);
    delay(100);
    digitalWrite(activeBuzzer, LOW);
  }

  lastButtonState = buttonState;
  delay(50);
}