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

#define BUTTON_1_PIN 15
#define BUTTON_2_PIN 16
#define BUTTON_3_PIN 17

const char* ssid = "Wokwi-GUEST";
const char* password = "";
WiFiClient wifiClient;

const char* mqttServer = "broker.hivemq.com";
const int mqttPort = 1883;
const char* mqttUser = "";
const char* mqttPassword = "";
const char* topic_pub = "ITKPS/Lab/button5";
PubSubClient mqttClient(wifiClient);

void setup_wifi() {
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println();
  Serial.print("WiFi connected on ");
  Serial.print("IP address: ");
  Serial.print(WiFi.localIP());
  Serial.print(" MAC address: ");
  Serial.println(WiFi.macAddress());
}

void reconnect() {
  while (!mqttClient.connected()) {
    Serial.print("Attempting MQTT connection...");
    if (mqttClient.connect("ESP32Sender")) {
      Serial.println("connected");
    } else {
      Serial.print("failed, rc=");
      Serial.print(mqttClient.state());
      delay(5000);
    }
  }
}

void setup() {
  Serial.begin(115200);
  setup_wifi();
  mqttClient.setServer(mqttServer, mqttPort);

  pinMode(BUTTON_1_PIN, INPUT_PULLUP);
  pinMode(BUTTON_2_PIN, INPUT_PULLUP);
  pinMode(BUTTON_3_PIN, INPUT_PULLUP);
}

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

  if (digitalRead(BUTTON_1_PIN) == LOW) {
    mqttClient.publish("home/led1", "toggle");
    delay(200); // ดีเลย์เพื่อป้องกันการกดซ้ำ
  }
  if (digitalRead(BUTTON_2_PIN) == LOW) {
    mqttClient.publish("home/led2", "toggle");
    delay(200);
  }
  if (digitalRead(BUTTON_3_PIN) == LOW) {
    mqttClient.publish("home/buzzer", "toggle");
    delay(200);
  }
}