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

#define LED 5
bool ledState = false;

//DHT Sensor type
DHTesp dht;

// WiFi settings
const char *ssid = "Wokwi-GUEST";     
const char *password = "";  
unsigned long lastMsg = 0;
float temp = 0;
float hum = 0;

const int DHT_PIN = 15;

// MQTT Broker settings
const char *mqtt_broker = "test.mosquitto.org";  
const char *mqtt_topic = "esp/led";
const int mqtt_port = 1883;  

WiFiClient espClient;
PubSubClient mqtt_client(espClient);

void connectToWiFi();

void connectToMQTTBroker();

void mqttCallback(char *topic, byte *payload, unsigned int length);

void setup() {
    Serial.begin(115200);
    connectToWiFi();
    mqtt_client.setServer(mqtt_broker, mqtt_port);
    mqtt_client.setCallback(mqttCallback);
    connectToMQTTBroker();
    dht.setup(DHT_PIN, DHTesp::DHT22);
}

void connectToWiFi() {
    WiFi.begin(ssid, password);
    Serial.print("Connecting to WiFi");
    while (WiFi.status() != WL_CONNECTED) {
        delay(500);
        Serial.print(".");
    }
    Serial.println("\nConnected to the WiFi network");
}

void connectToMQTTBroker() {
    while (!mqtt_client.connected()) {
        String client_id = "esp8266-client-" + String(WiFi.macAddress());
        Serial.printf("Connecting to MQTT Broker as %s.....\n", client_id.c_str());
        if (mqtt_client.connect(client_id.c_str())) {
            Serial.println("Connected to MQTT broker");
            mqtt_client.subscribe(mqtt_topic);
            // Publish message upon successful connection
            mqtt_client.publish(mqtt_topic, "tervee olen japsu");
        } else {
            Serial.print("Failed to connect to MQTT broker, rc=");
            Serial.print(mqtt_client.state());
            Serial.println(" try again in 5 seconds");
            delay(5000);
        }
    }
}

void mqttCallback(char *topic, byte *payload, unsigned int length) {
    Serial.print("Message received on topic: ");
    Serial.println(topic);
    Serial.print("Message:");
    String message;
    for (int i = 0; i < length; i++) {
        message += (char) payload[i];  // Convert *byte to string
    }
    // Control the LED based on the message received
    if (message == "on" && !ledState) {
        digitalWrite(LED, HIGH);  // Turn on the LED
        ledState = true;
        Serial.println("LED is turned on");
    }
    if (message == "off" && ledState) {
        digitalWrite(LED, LOW); // Turn off the LED
        ledState = false;
        Serial.println("LED is turned off");
    }
    Serial.println();
    Serial.println("-----------------------");
}

void loop() {
    if (!mqtt_client.connected()) {
        connectToMQTTBroker();
    }
    mqtt_client.loop();
{
  unsigned long now = millis();
  if  (now - lastMsg > 5000){
    lastMsg = now;
    TempAndHumidity  data = dht.getTempAndHumidity();
    String temp=String(data.temperature, 2);
    mqtt_client.publish("esp/temp", temp.c_str());
    String hum=String(data.humidity,2);
    mqtt_client.publish("esp/hum", hum.c_str());

  
   Serial.print("\nTemperature ");
   Serial.println(temp);
   Serial.print("Humidity: ");
   Serial.println(hum);
}
}
}