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

#define LED_1 4
#define LED_2 5

//---- WiFi settings
const char* ssid = "Wokwi-GUEST";
const char* password = "";
//---- MQTT Broker settings
const char* mqtt_server = "80fe29ce8268427c9a4a9aeb6cabf603.s2.eu.hivemq.cloud"; // replace with your broker url
const char* mqtt_username = "redes1"; // replace with your username
const char* mqtt_password = "projetoredes1"; // replace with your password
const int mqtt_port =8883;

WiFiClientSecure espClient;
PubSubClient client(espClient);
unsigned long lastMsg = 0;

const char* data_topic= "valores/41";


#define MSG_BUFFER_SIZE (50)
char msg[MSG_BUFFER_SIZE];

static const char *root_ca PROGMEM = R"EOF(
-----BEGIN CERTIFICATE-----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=
-----END CERTIFICATE-----
)EOF";


void conectarWifi()
{
  WiFi.begin(ssid, password);
  
  // Tentativa de estabelecer conexão
  while(WiFi.status() != WL_CONNECTED)
  {
    Serial.print(".");
    delay(1000);
  }

  Serial.println("\nWiFi connected\nIP address: ");
  Serial.println(WiFi.localIP());
}

void setup() {

Serial.begin(9600);
Serial.print("\nConnecting to ");
Serial.println(ssid);

WiFi.mode(WIFI_STA);
conectarWifi();

//randomSeed(micros());

while (!Serial) delay(1);

pinMode(LED_1, OUTPUT);
digitalWrite(LED_1, LOW); 

pinMode(LED_2, OUTPUT);  
digitalWrite(LED_2, LOW); 

espClient.setCACert(root_ca);
client.setServer(mqtt_server, mqtt_port);
client.setCallback(callback);
}

void loop() {

  if (WiFi.status() == WL_CONNECTED)
  {
    if (!client.connected()) reconnect();
    client.loop();
  } 
  else 
  {
    conectarWifi();
  }
  
}

//=======================================================================Function=================================================================================

void reconnect() {
  // Loop until we’re reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection…");
    String clientId = "ESP32Client-"; // Create a random client ID
    clientId += String(random(0xffff), HEX);
    // Attempt to connect
    if (client.connect(clientId.c_str(), mqtt_username, mqtt_password)) {
      Serial.println("connected");

      client.subscribe(data_topic);
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 3 seconds");   // Wait 5 seconds before retrying
      delay(3000);
    }
  }
}

//=======================================
// This void is called every time we have a message from the broker

void callback(char* topic, byte* payload, unsigned int length) {
  String incommingMessage = "";
  for (int i = 0; i < length; i++) incommingMessage+=(char)payload[i];
  Serial.println("Message arrived ["+String(topic)+"] "+incommingMessage);

}

//=======================================
// This void is called every time we have a message from the broker
void publishValores()
{
  // Formata a string com os valores sensoriados
  String csvData = "41;teste;F7W2OHeM8P;

  // Converte a String para um array de caracteres (char[])
  char payloadCsv[csvData.length() + 1];
  csvData.toCharArray(payloadCsv, csvData.length() + 1);
  
  // Publica o valor no tópico desejado
  MQTT.publish("dados", payloadCsv);
}