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

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

WiFiClient espClient;
PubSubClient client(espClient);



#define Position_auto 10
#define Poteau1 27
#define Poteau2 14
#define Poteau3 12

#define TRIG 26
#define ECHO 25
#define Marche_arr 32
#define Buzz 33

#define Humidity 15




void setup_wifi() {
 delay(10);
 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(".");
 }

 randomSeed(micros());

 Serial.println("");
 Serial.println("WiFi connected");
 Serial.println("IP address: ");
 Serial.println(WiFi.localIP());
}


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


void reconnect() {
 while (!client.connected()) {
   Serial.print("Attempting MQTT connection...");
   String clientId = "ESP32Client-";
   clientId += String(random(0xffff), HEX);
   if (client.connect(clientId.c_str())) {
     Serial.println("Connected");
     client.publish("/ThinkIOT/Publish", "Welcome");
     client.subscribe("/ThinkIOT/Subscribe");
   } else {
     Serial.print("failed, rc=");
     Serial.print(client.state());
     Serial.println(" try again in 5 seconds");
     delay(5000);
   }}
}



void setup() {

  Serial.begin(115200);
  pinMode(Position_auto, INPUT);
  pinMode(Poteau1, OUTPUT);
  pinMode(Poteau2, OUTPUT);
  pinMode(Poteau3, OUTPUT);

  pinMode(TRIG, OUTPUT);
  pinMode(ECHO, INPUT);
  pinMode(Marche_arr, INPUT);
  pinMode(Buzz, OUTPUT);

  pinMode(Humidity, INPUT);

  digitalWrite(Buzz, LOW);
  digitalWrite(Poteau1, LOW);
  digitalWrite(Poteau2, LOW);
  digitalWrite(Poteau3, LOW);


  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);

}




void loop() {
    
  if (digitalRead(Position_auto) == HIGH){
    digitalWrite(Poteau1, HIGH);
    delay(500);
    digitalWrite(Poteau2, HIGH);
    delay(500);
    digitalWrite(Poteau3, HIGH);
    
    delay(2000);

    digitalWrite(Poteau1, LOW);
    delay(500);
    digitalWrite(Poteau2, LOW);
    delay(500);
    digitalWrite(Poteau3, LOW);
  }
  else{
    digitalWrite(Poteau1, LOW);
    digitalWrite(Poteau2, LOW);
    digitalWrite(Poteau3, LOW);
  }


  if(digitalRead(Marche_arr) == LOW){
    digitalWrite(TRIG, HIGH);
    delayMicroseconds(10);
    digitalWrite(TRIG, LOW);
    int distance = pulseIn(ECHO, HIGH) / 58;
    if(distance <= 3){
      tone(Buzz, 1000);
    }
    else{
      noTone(Buzz);
    }
  }
  else{
    noTone(Buzz);
  }



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

  String humidity_value = String(analogRead(Humidity), 1);
  client.publish("/esp32/humidity", humidity_value.c_str()); 

  Serial.print("Humidity: ");
  Serial.println(humidity_value);


}