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

const char* ssid = "ANLI";
const char* password = "Actua1455";

const char* mqtt_server = "broker.emqx.io";
const char* mqtt_Client = "FabAcademy_Colombia_ANDRU";
const char* mqtt_Topic_Pub = "FabAcademy/week11";

#define TOUCH_PIN D2   // D2 on XIAO ESP32 C3

WiFiClient espClient;
PubSubClient client(espClient);

void setup_wifi() {
  delay(10);
  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.println("WiFi connected");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());
}

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

void setup() {
  Serial.begin(115200);
  pinMode(TOUCH_PIN, INPUT);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
}

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

  int touchValue = digitalRead(TOUCH_PIN);
  static bool lastTouch = false;

  if (touchValue == HIGH && !lastTouch) {
    client.publish(mqtt_Topic_Pub, "TOUCH");
    Serial.println("Touch detected, message sent!");
    lastTouch = true;
    delay(300); // debounce
  } else if (touchValue == LOW) {
    lastTouch = false;
  }
}