#include <IRremote.hpp>

const int IR_RECEIVE_PIN = 2;
const int LED_PIN = 9;  // Must be PWM-capable (e.g., 3, 5, 6, 9, 10, 11 on Uno)

int brightness = 0;     // 0–255 PWM value

void setup() {
  Serial.begin(9600);
  IrReceiver.begin(IR_RECEIVE_PIN, ENABLE_LED_FEEDBACK);
  pinMode(LED_PIN, OUTPUT);
  analogWrite(LED_PIN, brightness);
  Serial.println("IR Remote LED Brightness Control Ready");
}

void loop() {
  if (IrReceiver.decode()) {
    unsigned long keyCode = IrReceiver.decodedIRData.command;

    Serial.print("Received key code: 0x");
    Serial.println(keyCode, HEX);

    switch (keyCode) {
      case 0x68:  // 0
        brightness = 0;
        Serial.println("Button: 0 → LED OFF");
        break;

      case 0x30:  // 1
        brightness = 28;  // ~10%
        Serial.println("Button: 1 → Brightness 10%");
        break;

      case 0x18:  // 2
        brightness = 56;
        Serial.println("Button: 2 → Brightness 20%");
        break;

      case 0x7A:  // 3
        brightness = 85;
        Serial.println("Button: 3 → Brightness 33%");
        break;

      case 0x10:  // 4
        brightness = 113;
        Serial.println("Button: 4 → Brightness 44%");
        break;

      case 0x38:  // 5
        brightness = 141;
        Serial.println("Button: 5 → Brightness 55%");
        break;

      case 0x5A:  // 6
        brightness = 170;
        Serial.println("Button: 6 → Brightness 66%");
        break;

      case 0x42:  // 7
        brightness = 198;
        Serial.println("Button: 7 → Brightness 77%");
        break;

      case 0x4A:  // 8
        brightness = 226;
        Serial.println("Button: 8 → Brightness 88%");
        break;

      case 0x52:  // 9
        brightness = 255;
        Serial.println("Button: 9 → Brightness 100%");
        break;

      case 0xA2:  // POWER
        brightness = 0;
        Serial.println("Button: POWER → LED OFF");
        break;

      case 0x02:  // PLUS
        brightness = min(brightness + 25, 255);
        Serial.println("Button: PLUS → Increase Brightness");
        break;

      case 0x98:  // MINUS
        brightness = max(brightness - 25, 0);
        Serial.println("Button: MINUS → Decrease Brightness");
        break;

      default:
        Serial.println("Button: Unmapped");
    }

    // Apply brightness
    analogWrite(LED_PIN, brightness);

    Serial.print("Current PWM Brightness: ");
    Serial.println(brightness);
    Serial.println("---------------");

    IrReceiver.resume();
  }
}