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

// WiFi credentials
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// MQTT Broker information
const char* mqtt_server = "test.mosquitto.org"; //
const int mqtt_port = 1883;
const char* mqtt_user = "";
const char* mqtt_password = "";

// MQTT topics
const char *mqtt_topic = "button_press";

// Pin connected to the button
const int buttonPin = 2;  // Change this according to your setup

// Variables
int lastButtonState = LOW;

// Initialize the WiFi and MQTT client
WiFiClient espClient;
PubSubClient client(espClient);

void setup() {
  // Start serial communication
  Serial.begin(115200);

  // Connect to Wi-Fi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(250);
    Serial.print(".");
  }
  Serial.println("WiFi connected");

  // Set up the button pin
  pinMode(buttonPin, INPUT);

  // Set up the MQTT client
  client.setServer(mqtt_server, mqtt_port);
}

void loop() {
  // Check for button press
  int buttonState = digitalRead(buttonPin);

  if (buttonState != lastButtonState) {
    if (buttonState == HIGH) {
      Serial.println("Button pressed");
      // Send MQTT message on button press
      if (client.connect("ArduinoClient", mqtt_user, mqtt_password)) {
        client.publish("/ThinkIOT/Push_Botton", "Button Pressed!@ESP32");
        client.disconnect();
      } else {
        Serial.println("Failed to connect to MQTT");
      }
    }
    delay(50);  // Debounce delay
  }

  lastButtonState = buttonState;
}