//#include <ESP8266WiFi.h>
#include <WiFi.h>
#include <PubSubClient.h>
#include <DHT.h>

// WiFi Parameters
const char* WIFI_SSID = "Wokwi-GUEST";
const char* WIFI_PASSWORD = "";
// MQTT Server Parameters
const char* MQTT_CLIENT_ID = "esp8266-weather-demo";
const char* MQTT_BROKER = "broker.mqttdashboard.com";
const char* MQTT_USER = "";
const char* MQTT_PASSWORD = "";
const char* MQTT_TOPIC = "wokwi-weather";

const int DHT_PIN = 15; // Pin D4 on NodeMCU

DHT dht(DHT_PIN, DHT22);

WiFiClient espClient;
PubSubClient client(espClient);

void setup() {
  Serial.begin(115200);
  delay(10);

  Serial.print("Connecting to WiFi");
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("Connected!");

  client.setServer(MQTT_BROKER, 1883);
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    if (client.connect(MQTT_CLIENT_ID, MQTT_USER, MQTT_PASSWORD)) {
      Serial.println("connected");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}

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

  float temp = dht.readTemperature();
  float humidity = dht.readHumidity();

  Serial.print("Measuring weather conditions... ");
  if (isnan(temp) || isnan(humidity)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }
  Serial.println("Updated!");

  // Create JSON message
  String message = "{\"temp\":" + String(temp) + ",\"humidity\":" + String(humidity) + "}";
  
  // Publish message to MQTT topic
  Serial.print("Reporting to MQTT topic ");
  Serial.print(MQTT_TOPIC);
  Serial.print(": ");
  Serial.println(message);
  client.publish(MQTT_TOPIC, message.c_str());

  delay(1000);
}