#include <IRremote.hpp>

const int relayPin = 15;      
const int irPin = 16;         
const int redPin = 18;       
const int greenPin = 19;      
const int bluePin = 20;       

IRrecv irrecv(irPin);
decode_results results;

bool isOn = false;            
int brightness = 255;         
int currentColor = 0;         

void setup() {
  pinMode(relayPin, OUTPUT);
  digitalWrite(relayPin, LOW);      
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);

  analogWrite(redPin, 0);
  analogWrite(greenPin, 0);
  analogWrite(bluePin, 0);

  irrecv.enableIRIn();              
  Serial.begin(9600);
}

void loop() {
  if (irrecv.decode(&results)) {
    unsigned long code = results.value;
    long powerCode = 0xFFA25D;    
    long colorChangeCode = 0xFF629D; 
    long increaseBrightnessCode = 0xFFE21D; 
    long decreaseBrightnessCode = 0xFF22DD; 

   
   if (code == powerCode) 
   {
    isOn = !isOn;
    digitalWrite(relayPin, isOn);  
     }

    }
    
    else if (code == colorChangeCode && isOn)
     {
      currentColor = (currentColor + 1) % 3;
      updateLED();
    }
    
    else if (code == increaseBrightnessCode && isOn) 
    {
      brightness = min(255, brightness + 51); 
      updateLED();
    }
    
    else if (code == decreaseBrightnessCode && isOn) 
    {
      brightness = max(0, brightness - 51); 
      updateLED();
    }
    
    irrecv.resume(); 
  }
}

void updateLED() {
  
  analogWrite(redPin, 0);
  analogWrite(greenPin, 0);
  analogWrite(bluePin, 0);

  
  if (currentColor == 0) 
  {
    analogWrite(redPin, brightness);
  } else if (currentColor == 1)
   {
    analogWrite(greenPin, brightness);
  } else if (currentColor == 2) 
  {
    analogWrite(bluePin, brightness);
  }
}