#include <WiFi.h>
#include <PubSubClient.h>
#include <Arduino.h>
#include <Adafruit_NeoPixel.h>

#define NUMPIXELS 16
#define NEOPIXEL_PIN 23

Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, NEOPIXEL_PIN, NEO_GRB + NEO_KHZ800);

#define MQTT_SERVER "broker.emqx.io"
#define MQTT_PORT 1883

#define MQTT_TOPIC_SET_LIGHT "/Light/Set"
#define MQTT_TOPIC_GET_LIGHT "/Light/Get"

const char *ssid = "Wokwi-GUEST";
const char *password = "";

WiFiClient espClient;
PubSubClient client(espClient);

void setup() {
  Serial.begin(115200);
  pixels.begin();

  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");
  
  client.setServer(MQTT_SERVER, MQTT_PORT);client.setCallback(callback);
}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();
  delay(10);  
}

void reconnect() {
  while (!client.connected()) {
    if (client.connect("mqttx_3c24a783")) {
      Serial.println("Connected to MQTT");
      updateColor("ff0000");
      client.publish(MQTT_TOPIC_SET_LIGHT, "ff0000");
      client.subscribe(MQTT_TOPIC_GET_LIGHT);
    } else {
      Serial.print("Failed, rc=");
      Serial.print(client.state());
      Serial.println(" Retrying in 5 seconds...");
      delay(5000);
    }
  }
}


void callback(char *topic, byte *payload, unsigned int length) {
  String message = "";
  for (int i = 0; i < length; i++) {
    message += (char)payload[i];
  }
  Serial.print("Payload: ");
  Serial.print("Command Received: ");
  Serial.println(message);
  if (strcmp(topic, MQTT_TOPIC_GET_LIGHT) == 0) {
    updateColor(message);
  }
}

void updateColor(String color) {
  for (int i = 0; i < NUMPIXELS; i++) {
    int hexColor = strtol(color.c_str(), NULL, 16);
    pixels.setPixelColor(i, hexColor);
    // Add delay of 1000
    
  }
  // Move it inside the loop 
  pixels.show();
}