#define LDR_PIN 2
#include <DHT.h>
#include <ArduinoJson.h>
#include <PubSubClient.h>
#include "WiFi.h"
byte relay1=4;
byte relay2=16;
byte sensorpin=14;
const int dhtPin = 27;
String abc;
const char* mqttServer = "broker.hivemq.com";
int port = 1883;
char clientId[50];
const char* ssid = "Wokwi-GUEST";
int channel = 6;
const char* password = "";
WiFiClient espClient;
PubSubClient client(espClient);
DynamicJsonDocument doc(1024);
DHT dht(dhtPin, DHT22);
String Motion;
String Bright;
float Temperature;



void setup()
{
  pinMode(LDR_PIN, INPUT);
  pinMode(sensorpin, INPUT);
  pinMode(relay1, OUTPUT);
  pinMode(relay2, OUTPUT);
  dht.begin();
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  Serial.print("Connecting to ");
  Serial.println(ssid);
  wifiConnect();
  client.setServer(mqttServer, port);
  client.setCallback(callback);


}
void loop()
{
  
  if (!client.connected())
  {
    mqttReconnect();
  }
  else
  {
    String JsonData;

    float temperature = dht.readTemperature();
    int sensorvalue = digitalRead(sensorpin);
    if(sensorvalue==HIGH)
    {
      doc["Motion"]="Motion Detected";
    }
    if(sensorvalue==LOW)
    {
      doc["Motion"]="Motion not Detected";
    }
    if(digitalRead(LDR_PIN) == LOW)
    {
      doc["Bright"]="Light ";
    }
    if(digitalRead(LDR_PIN) == HIGH)
    {
      doc["Bright"]="Dark";
    }
    doc["Temperature"]=temperature;
    serializeJson(doc, JsonData);
    client.publish("esp32-h",JsonData.c_str());


  }
  client.loop();
}
  

void wifiConnect() {
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
}
void mqttReconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    long r = random(1000);
    sprintf(clientId, "fcs-clientId-%ld", r);
    if (client.connect(clientId)) {
      Serial.print(clientId);
      Serial.println("connected");
      client.subscribe("esp32-H");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}

void callback(char* topic ,byte* message,unsigned int length)
{
  Serial.print("Message arrived in topic");
  Serial.print(topic);
  Serial.print("Message:");
  String stMessage;

  for (int i=0;i<length;i++)
  {
    //Serial.print((char)message[i]);
    stMessage+=(char)message[i];
  }
   DeserializationError error = deserializeJson(doc,stMessage);
   if (error)
  {
  Serial.print("Parsing failed: ");
  Serial.println(error.c_str());
  return;
  }
  Motion=doc["Motion"].as<String>();
  Bright=doc["Bright"].as<String>();
  Temperature=doc["Temperature"];
  Serial.print("Temperature : ");
  Serial.println(Temperature);
  Serial.print("Motion : ");
  Serial.println(Motion);
  Serial.print("Brightness : ");
  Serial.println(Bright);
  

  if((Motion=="Motion Detected") && (Bright == "Dark"))
  {
    digitalWrite(relay1,LOW);
  }
  else
  {
    digitalWrite(relay1,HIGH);

  }

  if(Temperature>=50.00)
  {
    digitalWrite(relay2,LOW);

  }
  else
  {
    digitalWrite(relay2,HIGH);

  }
  



    
}