#include <PubSubClient.h>
#include <NTPClient.h>
#include "DHTesp.h"
#include <WiFi.h>

const int DHT_PIN = 12;
DHTesp dhtSensor;

WiFiClient espClient;

// mqttClient the variable 
PubSubClient mqttClient(espClient);

WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP);

char tempAr[6];

// >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
void setup() {
  Serial.begin(115200);
  setupWifi();

  setupMqtt();

  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
}

// >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
void loop() {
  if (!mqttClient.connected()){
    connectToBroker();
  }

  mqttClient.loop();

  updateTemperature();
  Serial.println(tempAr);
  // publish the temperature
  mqttClient.publish("MEDIBOX_TEMP", tempAr);

  // updateTemperature();

  // TempAndHumidity data = dhtSensor.getTempAndHumidity();
  // Serial.println(String(data.temperature, 2));

  delay(1000); 
}

// >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
void setupWifi(){
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println("Wokwi-GUEST");

  // connecting to wifi
  WiFi.begin("Wokwi-GUEST","");

  while (WiFi.status() != WL_CONNECTED){
    delay(500);
    Serial.print(".");
  }

  Serial.print("");
    Serial.println("WiFi Connected");
    Serial.println("IP Address: ");
    Serial.println(WiFi.localIP());
}

// >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
void setupMqtt(){
  // setting the server
  mqttClient.setServer("test.mosquitto.org", 1883);
  // test.mosquitto.org
  // 127.0.0.1
  mqttClient.setCallback(receiveCallback);
}

// receving msg part >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
void receiveCallback(char* topic,byte* payload,unsigned int length){
  Serial.print("Message arrived [");
  Serial.print(topic);
  Serial.print("] ");

  // to take the value another variable
  char payloadCharAr[length];
  for (int i= 0; i<length; i++){
    Serial.print((char) payload[i]); // convert bite into char to print 
    payloadCharAr[i] = (char)payload[i]; // each i will be casted
  }
  Serial.println();

//   // depending on the on off topic, on off the LED
//   if(strcmp(topic, "ENTC-ADMIN-MAIN-ON-OFF") == 0){  // strcmp: string compare meethod
//     // if(payloadCharAr[0]='1'){
//     //   buzzreOn(true);
//     // }else{
//     //   buzzerOn(false);
//     // }
//     // insterd of above if else function we can use
//     buzzerOn(payloadCharAr[0]='1');

//     // then we have to subscribe
//   }else if(strcmp(topic, "ENTC-ADMIN-SCH-ON-OFF") == 0){
//     if(payloadCharAr[0]='N'){ // NOT N the 1st character we send
//       isScheduledON = false; 
//     }else{
//       isScheduledON = true;
//       scheduledOnTime = atol(payloadCharAr);  // array to long
//     }
//   }
}

// // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
void connectToBroker(){
  while (!mqttClient.connected()){
    Serial.println("Attempting MQTT connection...");
    if (mqttClient.connect("ESP32-56465466")){
      Serial.println("Connected");
//       // after connected we can subscribe 
//       mqttClient.subscribe("ENTC-ADMIN-MAIN-ON-OFF");
//       mqttClient.subscribe("ENTC-ADMIN-SCH-ON");

    }else{
      Serial.print("failed");
      Serial.print(mqttClient.state()); // give the state that connected or not
      delay(5000);
    }
  }
}

// >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
void updateTemperature(){
  TempAndHumidity data = dhtSensor.getTempAndHumidity();
  String(data.temperature,2).toCharArray(tempAr,6);
  // fectch the temp value and convert into 2 decimal string
  // only get char array with 6 values
}

// >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>