#include <WiFi.h>
#include <PubSubClient.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#include <ArduinoJson.h>

#include "DHTesp.h" 




const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "broker.hivemq.com";
const char* stopic = "luuvachiase/led";
const char* ptopic = "luuvachiase/stt";
const char* ptopic1 = "luuvachiase/stt";
const char* lwt_topic = "455421332113213/lwt_topic";
 
//const int oneWireBus = 4;  // dùng pin GPIO4

const int DHT_PIN = 15; // DHT22
char result_temp[10]; // Buffer big enough for 7-character float
char result_hum[10]; // Buffer big enough for 7-character float

WiFiClient espClient;
PubSubClient client(espClient);
unsigned long lastMsg = 0;

DHTesp dhtSensor;

void setup_wifi() {

  delay(10);
  // We start by connecting to a WiFi network
  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 ReceivedMessage(char* topic, byte* payload, unsigned int length) {
  // Output the first character of the message to serial (debug)
  StaticJsonDocument<200> doc;
  deserializeJson(doc, payload, length);
  
  // Extract values from the JSON data
  String id = doc["id"];
  String data = doc["data"];

  Serial.print(id);
  Serial.print(":");
  Serial.println(data);
  

  if(id=="pin12"&& data=="on"){digitalWrite(12, LOW); Serial.println("LOW");} 
  if(id=="pin12"&& data=="off") {digitalWrite(12, HIGH); Serial.println("HIGH");} 

  if(id=="pin14"&& data=="on"){digitalWrite(14, LOW); Serial.println("LOW");} 
  if(id=="pin14"&& data=="off") {digitalWrite(14, HIGH); Serial.println("HIGH");}

  if(id=="pin13"&& data=="on"){digitalWrite(13, LOW); Serial.println("LOW");} 
  if(id=="pin13"&& data=="off") {digitalWrite(13, HIGH); Serial.println("HIGH");}

}


void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    // Create a random client ID
    String clientId = "ESP8266Client-455421332113213";
    //clientId += String(random(0xffff), HEX);
    // Attempt to connect

  StaticJsonDocument<50> lwtJson;
  lwtJson["stt"] = 0; // Customize the JSON data as needed

  // Convert the JSON object to a JSON string
  char lwtMessage[200];
  serializeJson(lwtJson, lwtMessage);
 
    if (client.connect(clientId.c_str(),lwt_topic, 2, true, lwtMessage)) {
      Serial.println("connected");
     
  DynamicJsonDocument RtJson(50);
  
  RtJson["stt"] = 1; // Customize the JSON data as needed
  // Convert the JSON object to a JSON string
  String RtMessage;
  
  serializeJson(RtJson, RtMessage);
      // Once connected, publish an announcement...
      const char* pl_RtMessage = RtMessage.c_str();
      client.publish(lwt_topic, pl_RtMessage, true);
       // ... and resubscribe
      client.subscribe(stopic);
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      // Wait 5 seconds before retrying
      delay(5000);
    }
  }
}

void publish_temp()
{
      TempAndHumidity  data_temp = dhtSensor.getTempAndHumidity();
      dtostrf(data_temp.temperature, 6, 2, result_temp); // Leave room for too large numbers!
      dtostrf(data_temp.humidity, 6, 2, result_hum); // Leave room for too large numbers!

      DynamicJsonDocument json(100);
      json["temp"] = result_temp;
      json["humi"] = result_hum;

      String jsonString;
      serializeJson(json, jsonString);
      
      const char* payload = jsonString.c_str();
      Serial.print("Publishing: ");
      Serial.println(payload);
      client.publish(ptopic, payload);
      Serial.print("Done!");

}

void publish_stt()
{
      TempAndHumidity  data_temp = dhtSensor.getTempAndHumidity();
      dtostrf(data_temp.temperature, 6, 2, result_temp); // Leave room for too large numbers!
      dtostrf(data_temp.humidity, 6, 2, result_hum); // Leave room for too large numbers!

      DynamicJsonDocument json(100);
      json["temp"] = result_temp;
      json["humi"] = result_hum;

      String jsonString;
      serializeJson(json, jsonString);
      
      const char* payload = jsonString.c_str();
      Serial.print("Publishing: ");
      Serial.println(payload);
      client.publish(ptopic, payload);
      Serial.print("Done!");

}


void setup() {

  
 
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  //Serial.println(lwtMessage);

  pinMode(12, OUTPUT);     // Initialize the BUILTIN_LED pin as an output
  pinMode(14, OUTPUT);  
  pinMode(13, OUTPUT); 

  digitalWrite(12, HIGH);
  digitalWrite(13, HIGH);
  digitalWrite(14, HIGH);

  Serial.begin(115200);
  // Start the DHT22 sensor
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
  
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(ReceivedMessage);

}

void loop() {
   if (!client.connected()) {
    reconnect();
  }
  client.loop();
  publish_temp();
  delay(1000);
}