#include <WiFi.h>
#include <MQTT.h>


const char ssid[] = "Wokwi-GUEST";
const char pass[] = "";

WiFiClient net;
MQTTClient client;


#define ledRed 27
#define ledYellow 26
#define ledGreen 25
#define  buzzer 33


const int trigPin = 23;
const int echoPin = 22;

long duration;
int distance;

unsigned long lastMillis = 0;

void connect(){
  // Menghubungkan ke WiFi
  Serial.print("Cek WiFi");
  while(WiFi.status() != WL_CONNECTED){
    Serial.print(".");
    delay(1000);
  }
  Serial.println("");
  Serial.println("Sukses Terhubung ke WiFi");

  // Menghubungkan ke Broker
  Serial.print("Cek Broker");
  while(!client.connect("")){ // Client ID boleh dikosongkan
    Serial.print(".");
    delay(1000);
  }
  Serial.println("");
  Serial.println("Sukses Terhubung ke Server");
  
  client.subscribe("labskitoo/iot/#", 1); // subcribe dengan QoS 1
}
void broconnect(){
  client.begin("broker.emqx.io", net);
  client.onMessage(subscribeData); 

  Serial.print("Connect Broker");
  while(!client.connect("")){ // Client ID boleh dikosongkan
    Serial.print(".");
    delay(1000);
  }
  Serial.println("");
  Serial.println("Sukses Terhubung ke Server");
  
  client.subscribe("labkite/iot/#", 1);
}
void subscribeData(String &topic, String &data){
  Serial.print("Topic: ");
  Serial.println(topic);
  Serial.print("Data: ");
  Serial.println(data);

  if(topic == "labskitoo/iot/led1"){  
    digitalWrite(ledRed, data.toInt());   //control led 1
    if(data=="1"){
    client.publish("labskitoo/iot/led1/status", "ON", true, 1);  
    }client.publish("labskitoo/iot/led1/status", "OFF", true, 1);
  }

  if(topic == "labskitoo/iot/led2"){
    digitalWrite(ledYellow, data.toInt());   //control led 2
    if(data=="1"){
    client.publish("labskitoo/iot/led2/status", "ON", true, 1);  
    }client.publish("labskitoo/iot/led2/status", "OFF", true, 1);
  }
  if(topic == "labskitoo/iot/led3"){
    digitalWrite(ledGreen, data.toInt());   //control led 2
    if(data=="1"){
    client.publish("labskitoo/iot/led3/status", "ON", true, 1);  
    }client.publish("labskitoo/iot/led3/status", "OFF", true, 1);
  }
}

void publish(){
  ultrasonic();
  client.publish("labskitoo/iot/us/cm", String(distance), true, 1); // publish variabel humidity ke topic labskite/iot/dht/humi dengan QoS 1
}

void ultrasonic()
{
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance = duration * 0.034 / 2;
  Serial.print("Distance: ");
  Serial.println(distance);
  if(distance >= 0 && distance <= 50){  
    digitalWrite(ledGreen, HIGH);
    digitalWrite(ledYellow, LOW);
    digitalWrite(ledRed, LOW);
    client.publish("labskitoo/iot/led1/status", "ON", true, 1);
    tone(buzzer, 1000);  // Mengaktifkan buzzer
    delay(1);              // Suara buzzer setiap 0.1 detik
    noTone(buzzer);      // Mematikan buzzer
    delay(1);              // Waktu jeda
  }else if (distance > 50 && distance <= 100) { 
    digitalWrite(ledGreen, LOW);
    digitalWrite(ledYellow, HIGH);
    digitalWrite(ledRed, LOW);
    client.publish("labskitoo/iot/led2/status", "ON", true, 1);
    tone(buzzer, 1000);  // Mengaktifkan buzzer
    delay(2);              // Suara buzzer setiap 0.2 detik
    noTone(buzzer);      // Mematikan buzzer
    delay(2);   
  }else if (distance > 100 && distance <= 200) {
    digitalWrite(ledGreen, LOW);
    digitalWrite(ledYellow, LOW);
    digitalWrite(ledRed, HIGH);
    client.publish("labskitoo/iot/led3/status", "ON", true, 1);
    tone(buzzer, 1000);  // Mengaktifkan buzzer
    delay(3);              // Suara buzzer setiap 0,3 detik
    noTone(buzzer);      // Mematikan buzzer
    delay(3);  
  }else {
    digitalWrite(ledGreen, LOW);
    digitalWrite(ledYellow, LOW);
    digitalWrite(ledRed, LOW);
    client.publish("labskitoo/iot/led1/status", "OFF", true, 1);
    client.publish("labskitoo/iot/led2/status", "OFF", true, 1);
    client.publish("labskitoo/iot/led3/status", "OFF", true, 1);
    noTone(buzzer);
  }
//delay(20);
}

void setup() {
  Serial.begin(115200);
  pinMode(ledRed,OUTPUT); 
  pinMode(ledYellow,OUTPUT);
  pinMode(ledGreen,OUTPUT);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(buzzer, OUTPUT);

  Serial.begin(9600);
  WiFi.begin(ssid, pass);
  client.begin("broker.emqx.io", net);
  client.onMessage(subscribeData); 
  connect();
}

void loop() {
  client.loop();
  // publish a message roughly every second.
 if (millis() - lastMillis > 1000) {
    lastMillis = millis();
    //publish();
   // broconnect();
    ultrasonic();
  }
  delay(10);
}