#include <WiFi.h>
#include <PubSubClient.h>
#include <ESP32Servo.h> 
#include "DHTesp.h"
#include <NewPing.h> // Biblioteca para el sensor de proximidad HC-SR04

// Declaración de objetos para monitoreo y control
const int DHT_PIN = 12;
DHTesp dhtSensor;
Servo myservo;       
NewPing sonar(14, 13, 450); // TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE

// Variables de autenticación
const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "test.mosquitto.org"; // MQTT broker

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

// Declaración de funciones adicionales
void setup_wifi() {
  delay(10);
  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* payload, unsigned int length) {
  String string;
  Serial.print("Message arrived [");
  Serial.print(topic);
  Serial.print("] ");
  for (int i = 0; i < length; i++) {
    string += (char)payload[i];
  }
  Serial.print(string);
  if (topic == "Motor/Servo_capo") { 
    Serial.print(" ");
    int status = string.toInt();   
    int pos = map(status, 1, 100, 0, 180);
    Serial.println("Dato Actual: "+String(status)+" | Dato convertido: "+String(pos));
    myservo.write(pos);
    delay(15); 
  }  
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    if (client.connect("ESPClient")) {
      Serial.println("connected");
      client.subscribe("Motor/Servo_capo");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds"); 
      delay(5000);
    }
  }
}

void setup() {
  Serial.begin(115200);
  myservo.attach(5);
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop(); 
  
  TempAndHumidity  data = dhtSensor.getTempAndHumidity();
  String temp = String(data.temperature, 2);
  client.publish("Read/temp_capo", temp.c_str());
  Serial.println("Temp: " + temp + "°C");
  String hum = String(data.humidity, 1);
  client.publish("/Read/hum_capo", hum.c_str());
  Serial.println("Humidity: " + hum + "%");

  unsigned int distance = sonar.ping_cm();
  if (distance != UINT_MAX) { // Verifica si la lectura es válida
    Serial.print("Distance: ");
    Serial.print(distance);
    Serial.println(" cm");
    client.publish("/Read/distance_capo", String(distance).c_str());
  }
  
  Serial.println("---");
  
  delay(2000); // Espera estabilizar lectura sensor (DHT22 -> ~0.5Hz sample rate)
}