/*
 * This ESP32 code is created by esp32io.com
 *
 * This ESP32 code is released in the public domain
 *
 * For more detail (instruction and wiring diagram), visit https://esp32io.com/tutorials/esp32-light-sensor
 */

#include <PubSubClient.h>
#include <WiFi.h>
#include <ESP32Servo.h>

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "broker.emqx.io";
const char* mqtt_user = "lidiamariano";
const char* mqtt_password = "Li15404628!";
const char* temp_topic = "tempdht22";
const char* servo_topic = "servomqtt1";

#define LIGHT_SENSOR_PIN 36 // ESP32 pin GIOP36 (ADC0)

WiFiClient espClient;
PubSubClient client(espClient);
Servo meuServo;


void setup() {
  // initialize serial communication at 9600 bits per second:
  Serial.begin(9600);
  Serial.begin(115200);
  meuServo.attach(2);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
  client.subscribe(temp_topic);
}

void loop() {
  // reads the input on analog pin (value between 0 and 4095)
  int analogValue = analogRead(LIGHT_SENSOR_PIN);

  Serial.print("Analog Value = ");
  Serial.print(analogValue);   // the raw analog reading

  // We'll have a few threshholds, qualitatively determined
  if (analogValue < 40) {
    Serial.println(" => Dark");
  } else if (analogValue < 800) {
    Serial.println(" => Dim");
  } else if (analogValue < 2000) {
    Serial.println(" => Light");
  } else if (analogValue < 3200) {
    Serial.println(" => Bright");
  } else {
    Serial.println(" => Very bright");
  }

  delay(500);

  clientconnected();
}

bool superando32Graus = false;

void setup_wifi() {
  Serial.println("Conectando ao WiFi...");
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.print(".");
  }
  Serial.println("\nConectado ao WiFi");
}

void receiveMQTTMessage(String message) {
  if (message == "Superando 32 graus!") {
    superando32Graus = true;
  }
}

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

  if (strcmp(topic, temp_topic) == 0) {
    receiveMQTTMessage(receivedMessage);
  }
}

void publishServoStatus(bool ligado) {
  if (ligado) {
    client.publish(servo_topic, "Ligado");
  } else {
    client.publish(servo_topic, "Desligado");
  }
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Conectando ao MQTT...");
    if (client.connect("ESP32Client", mqtt_user, mqtt_password)) {
      Serial.println("Conectado");
      client.subscribe(temp_topic);
    } else {
      Serial.print("Falha, rc=");
      Serial.print(client.state());
      Serial.println(" Tentando novamente em 5 segundos");
      delay(5000);
    }
  }
}


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

  if (superando32Graus) {
    for (int pos = 0; pos <= 180; pos += 1) {
      meuServo.write(pos);
      delay(15);
    }
    delay(1000);
    for (int pos = 180; pos >= 0; pos -= 1) {
      meuServo.write(pos);
      delay(15);
    }
  } else {
    meuServo.write(0); // Define a posição inicial do servomotor quando não está superando 32 graus
  }

  publishServoStatus(superando32Graus);
}