#define BLYNK_PRINT Serial
#define BLYNK_TEMPLATE_ID "TMPL6HwpXfwEA"
#define BLYNK_TEMPLATE_NAME "HomeTemp"
#define BLYNK_AUTH_TOKEN "nSeym12oJmoKmetousBpH00FBabOdcz4"

#include <WiFi.h>
#include <WiFiClient.h>
#include <WiFiClientSecure.h>
#include <BlynkSimpleEsp32.h>
#include <PubSubClient.h>

char auth[] = BLYNK_AUTH_TOKEN;

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

const char* mqtt_server = "00a27a64bde1443792f8d799bfd10fb2.s1.eu.hivemq.cloud"; 
const char* mqtt_username = "Mohammad";
const char* mqtt_password = "Slallcheats0";
const int mqtt_port = 8883;
unsigned long previousMillis = 0;
const long interval = 1000; 
BlynkTimer timer;

WiFiClientSecure secureClient;
PubSubClient mqttClient(secureClient);

const char* mqtt_ca_cert = R"EOF(
-----BEGIN CERTIFICATE-----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=
-----END CERTIFICATE-----
)EOF";

#define button1_pin 26
#define lED1_pin 14
#define lED2_pin 12
#define lED3_pin 15
#define lED4_pin 2
#define Switch_pin 4
#define Buzzer_pin 25

const char* temp_topic1 = "slide";
const char* temp_topic2 = "push";
float temp = 0;
float humidity = 0;
float distance = 0;
bool slidestateswitch =0;
bool pushstateswitch =0;
bool Led1state =0;
bool Led2state =0;
bool Led3state =0;
bool Led4state =0;
int buuzzerstate = 0  ; 

void mqttCallback(char* topic, byte* payload, unsigned int length) {
  String message;
  for (int i = 0; i < length; i++) {
    message += (char)payload[i];
  }

  if (String(topic) == "Temperature") {
        temp = message.toInt();

        if(temp > 50){

            tone(Buzzer_pin,250,100);
        }   
        else{
            noTone(Buzzer_pin);
        }   
  } else if (String(topic) == "Humidity") {
        humidity = message.toInt();

        if(humidity > 80){

            tone(Buzzer_pin,250,100);
        }   
        else{
            noTone(Buzzer_pin);
        }   
  }else if (String(topic) == "Distance") {
       distance = message.toInt();
    int distancemappaed = map(distance,0,400,0,4 );
    if (distancemappaed == 4){
      digitalWrite(lED1_pin, HIGH);
      digitalWrite(lED2_pin, HIGH);
      digitalWrite(lED3_pin, HIGH);
      digitalWrite(lED4_pin, HIGH);
      Led1state = 1 ; 
      Led2state = 1 ; 
      Led3state = 1 ; 
      Led4state = 1 ; 
    }
    else if (distancemappaed == 3 ){
      digitalWrite(lED1_pin, HIGH);
      digitalWrite(lED2_pin, HIGH);
      digitalWrite(lED3_pin, HIGH);
      digitalWrite(lED4_pin, LOW);
      Led1state = 1 ; 
      Led2state = 1 ; 
      Led3state = 1 ; 
      Led4state = 0 ;
    }else if (distancemappaed == 2){
      digitalWrite(lED1_pin, HIGH);
      digitalWrite(lED2_pin, HIGH);
      digitalWrite(lED3_pin, LOW);
      digitalWrite(lED4_pin, LOW);
      Led1state = 1 ; 
      Led2state = 1 ; 
      Led3state = 0 ; 
      Led4state = 0 ;
    }else if (distancemappaed == 1 ){
      digitalWrite(lED1_pin, HIGH);
      digitalWrite(lED2_pin, LOW);
      digitalWrite(lED3_pin, LOW);
      digitalWrite(lED4_pin, LOW);
      Led1state = 1 ; 
      Led2state = 0 ; 
      Led3state = 0 ; 
      Led4state = 0 ;
    }else {
      digitalWrite(lED1_pin, LOW);
      digitalWrite(lED2_pin, LOW);
      digitalWrite(lED3_pin, LOW);
      digitalWrite(lED4_pin, LOW);
      Led1state = 0 ; 
      Led2state = 0 ; 
      Led3state = 0; 
      Led4state = 0 ;
    }

  }
}

// Connect to MQTT broker
void connectToMQTT() {
  while (!mqttClient.connected()) {
    Serial.print("Connecting to MQTT...");
    if (mqttClient.connect("ESP32_Client2", mqtt_username, mqtt_password)) {
      Serial.println("Connected to MQTT!");

      // Subscribe to topics
      mqttClient.subscribe("Temperature");
      mqttClient.subscribe("Humidity");
      mqttClient.subscribe("Distance");
    } else {
      Serial.print("Failed, rc=");
      Serial.print(mqttClient.state());
      Serial.println(" Try again in 2 seconds");
      delay(2000);
    }
  }
}

void sendsensor(){

    slidestateswitch = digitalRead(Switch_pin);
    pushstateswitch = digitalRead(button1_pin);
/*   Blynk.virtualWrite(V1, slidestateswitch);
  Blynk.virtualWrite(V0, pushstateswitch);*/
   Blynk.virtualWrite(V2, Led1state);
   Blynk.virtualWrite(V3, Led2state);
   Blynk.virtualWrite(V4, Led3state);
   Blynk.virtualWrite(V5, Led4state);



}



void setup() {
  Serial.begin(115200);

  WiFi.begin(ssid, pass);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nConnected to WiFi");

  secureClient.setCACert(mqtt_ca_cert);
  mqttClient.setServer(mqtt_server, mqtt_port);
  mqttClient.setCallback(mqttCallback);

  connectToMQTT();

  pinMode(button1_pin, INPUT_PULLUP);
  pinMode(Switch_pin, INPUT_PULLUP);
  pinMode(Buzzer_pin,OUTPUT);
  pinMode(lED1_pin,OUTPUT);
  pinMode(lED2_pin,OUTPUT);
  pinMode(lED3_pin,OUTPUT);
  pinMode(lED4_pin,OUTPUT);



 



  Blynk.begin(auth, ssid, pass);
  timer.setInterval(2000, sendsensor);

}

void loop() {
  Blynk.run();
  timer.run();

  if (!mqttClient.connected()) {
    connectToMQTT();
  }
  mqttClient.loop();
unsigned long currentMillis = millis();
  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;

    slidestateswitch = digitalRead(Switch_pin);
    pushstateswitch = digitalRead(button1_pin);

    Serial.print("Switch_pin ");
    Serial.print(slidestateswitch);
    mqttClient.publish(temp_topic1, String(slidestateswitch).c_str());
    mqttClient.publish(temp_topic2, String(pushstateswitch).c_str());

    Serial.print("button1_pin ");
    Serial.print(pushstateswitch);
    }
  
}

BLYNK_WRITE(v0) {
  buuzzerstate = param.asInt();
  if(buuzzerstate){
    tone(Buzzer_pin,250,100);
    delay(1000);
  }
  else{
        noTone(Buzzer_pin);
    delay(1000);

  }
  
}