#include <WiFi.h>
#include <PubSubClient.h>
#include <MD_Parola.h>
#include <MD_MAX72XX.h>
#include <SPI.h>

// Define hardware type and number of devices
#define HARDWARE_TYPE MD_MAX72XX::FC16_HW
#define MAX_DEVICES 4

// Define pin connections
#define DATA_PIN 10
#define CS_PIN   9
#define CLK_PIN  8

// Create a Parola object
MD_Parola display = MD_Parola(HARDWARE_TYPE, DATA_PIN, CLK_PIN, CS_PIN, MAX_DEVICES);

const char* ssid     = "ANLI";
const char* password = "Actua1455";

const char* mqtt_server = "broker.emqx.io";
const char* mqtt_Client = "ANDRUClient2025";
const char* mqtt_Topic_Sub ="fabacademy/message";

WiFiClient espClient;
PubSubClient client(espClient);
long lastMsg = 0;
char msg[50];
int value = 0;

String messageTemp = "";
bool newMessage = false;


void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  setup_wifi();

  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);

  display.begin();
  display.setIntensity(3);
  display.displayClear();
  display.displaySuspend(false);
}

void setup_wifi() {
  delay(10);
  // We start by connecting to a WiFi network
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

void callback(char* topic, byte* message, unsigned int length) {
  Serial.print("Message arrived on topic: ");
  Serial.print(topic);
  Serial.print(". Message: ");

  if (String(topic) == mqtt_Topic_Sub) {
    messageTemp = "";
    for (int i = 0; i < length; i++) {
            messageTemp += (char)message[i];
    }
    Serial.println(messageTemp);
    newMessage = true;
}
}

void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    // Attempt to connect
    if (client.connect(mqtt_Client)) {
      Serial.println("connected");
      // Subscribe
      client.subscribe(mqtt_Topic_Sub);
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      // Wait 5 seconds before retrying
      delay(5000);
    }
  }
}

void loop() {

if (newMessage) {
    display.displayClear();
    Serial.println(newMessage);
    Serial.println(messageTemp.c_str());
    display.displayScroll(messageTemp.c_str(), PA_LEFT, PA_SCROLL_LEFT, 100);
    newMessage = false;
  }

  if (display.displayAnimate()) {
    display.displayReset(); // solo si quieres que repita
  }

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