// Configuración de Wi-Fi
//const char* ssid = "Wokwi-GUEST";

// Configuración de MQTT
//const char* mqtt_server = "broker.hivemq.com"; 
// Usar un broker público para la simulación
// broker.emqx.io
// test.mosquitto.org - https://testclient-cloud.mqtt.cool/?

#include <WiFi.h>
#include <PubSubClient.h>
#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <DHT.h>
#include <Adafruit_SSD1306.h>

// Configuración de Wi-Fi
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// Configuración de MQTT
const char* mqtt_server = "test.mosquitto.org";
const char* mqtt_user = "";
const char* mqtt_password = "";

WiFiClient espClient;
PubSubClient client(espClient);

// Configuración del sensor DHT
#define DHTPIN 14
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);

// Configuración de la pantalla OLED
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

// Pines para los LEDs
const int ledPin1 = 25;
const int ledPin2 = 26;

// Contador
unsigned long previousMillis = 0;
const long interval = 1000;
int counter = 0;

void setup_wifi() {
  delay(10);
  Serial.println();
  Serial.print("Conectando a ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);

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

  Serial.println("");
  Serial.println("WiFi conectado");
  Serial.println("Dirección IP: ");
  Serial.println(WiFi.localIP());
}

void callback(char* topic, byte* payload, unsigned int length) {
  Serial.print("Mensaje recibido [");
  Serial.print(topic);
  Serial.print("] ");
  String message;
  for (int i = 0; i < length; i++) {
    message += (char)payload[i];
  }
  Serial.println(message);

  if (strcmp(topic, "rlopera/sala/led1") == 0) {
    if (message == "ON") {
      digitalWrite(ledPin1, HIGH);
    } else if (message == "OFF") {
      digitalWrite(ledPin1, LOW);
    }
  } else if (strcmp(topic, "rlopera/sala/led2") == 0) {
    if (message == "ON") {
      digitalWrite(ledPin2, HIGH);
    } else if (message == "OFF") {
      digitalWrite(ledPin2, LOW);
    }
  }
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Intentando conexión MQTT...");
    if (client.connect("ESP32Client", mqtt_user, mqtt_password)) {
      Serial.println("conectado");
      client.subscribe("rlopera/sala/led1");
      client.subscribe("rlopera/sala/led2");
    } else {
      Serial.print("falló, rc=");
      Serial.print(client.state());
      Serial.println(" intentar de nuevo en 1 segundos");
      delay(1000);
    }
  }
}

void setup() {
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);

  dht.begin();

  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0, 0);
  display.println("ESP32 MQTT Demo");
  display.display();

  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin2, OUTPUT);
}

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

  unsigned long currentMillis = millis();
  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;

    // Leer temperatura y humedad
    float temperature = random(100, 500) / 10.0; //dht.readTemperature();
    float humidity = random(100, 900) / 10.0; //dht.readHumidity();

    // Mostrar en pantalla
    display.clearDisplay();
    display.setCursor(0, 0);
    display.print("Temp: ");
    display.print(temperature);
    display.println(" C");
    display.print("Hum: ");
    display.print(humidity);
    display.println(" %");
    display.print("Counter: ");
    display.println(counter);
            display.setTextSize(1);  display.setCursor(0,49);
            display.print(WiFi.localIP()); display.print("("); display.print(WiFi.RSSI()); display.println(")");
            display.print(WiFi.SSID());
    display.display();

    // Publicar datos
    String tempStr = String(temperature);
    String humStr = String(humidity);
    String counterStr = String(counter);

    client.publish("rlopera/sala/temperatura", tempStr.c_str());
    client.publish("rlopera/sala/humedad", humStr.c_str());
    client.publish("rlopera/sala/contador", counterStr.c_str());

    counter++;
  }
}