#include <WiFi.h>
#include <PubSubClient.h>
#define LED_VALVULA 14

// Update these with values suitable for your network.

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "test.mosquitto.org";

//Recebe dados
String my_payload;
String my_topic;

String getWaterLevelStatus(float distance) {
  if (distance < 5.0) return "ALTO";
  if (distance < 10.0) return "MEDIO";
  return "BAIXO";
}




WiFiClient WOKWI_Client;
PubSubClient client(WOKWI_Client);


void setup_wifi() {

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

  WiFi.mode(WIFI_STA);
  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 conc_payload;
  for (int i = 0; i < length; i++) {
    conc_payload += ((char)payload[i]);
  }
  my_payload = conc_payload;
  my_topic = topic;
}

void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    if (client.connect("WOKWI_Client")) {
      Serial.println("connected");
      
      client.subscribe("ESP32_RECEBE");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      // Wait 5 seconds before retrying
      delay(5000);
    }
  }
}

void setup() {
  pinMode(14, OUTPUT);
  digitalWrite(14, LOW);
  pinMode(13, OUTPUT);
  pinMode(12, INPUT);
  pinMode(2, OUTPUT);
  pinMode(15, OUTPUT);
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
}

float readWaterLevel() {
  digitalWrite(13, LOW);
  delayMicroseconds(2);
  digitalWrite(13, HIGH);
  delayMicroseconds(10);
  digitalWrite(13, LOW);

  long duration = pulseIn(12, HIGH);
  float distance = duration * 0.034 / 2; // Calcula distância em cm

  return distance;
}

void Conexao_WIFI()
{
  if(WiFi.status())
  digitalWrite(2, HIGH);
  else
  digitalWrite(2, LOW);
}

void Conexao_MQTT()
{
  if(client.connected())
  digitalWrite(15, HIGH);
  else
  digitalWrite(15, LOW);
}

void Publica_dados()
{
int Valor_POT;
Valor_POT = analogRead(34);
client.publish("TOPICO_WOKWI", String(Valor_POT).c_str());
delay(1000);
}

unsigned long startTime = 0;

void PublicaNivelAgua() {
    float nivel = readWaterLevel();

    // Publica o nível no Node-RED
    client.publish("TOPICO_NIVEL_AGUA", String(nivel).c_str());

    // Lógica de temporizador
    if (nivel > 15.0 && startTime == 0) {
        digitalWrite(LED_VALVULA, HIGH);
        startTime = millis(); // Marca o início do enchimento
    } else if (millis() - startTime > 10000) { // 10 segundos para encher
        digitalWrite(LED_VALVULA, LOW);
        startTime = 0; // Reset do temporizador
    }
}



void loop() {

  
  reconnect();
  client.loop();
  Conexao_WIFI();
  Conexao_MQTT();
  Publica_dados();
  PublicaNivelAgua();


}