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

#define PIR_PIN 14

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "broker.hivemq.com";

WiFiClient espClient;
PubSubClient client(espClient);

int lastState = LOW;

void setup() {
  Serial.begin(115200);
  pinMode(PIR_PIN, INPUT);

  Serial.println("Connecting WiFi...");
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("\nWiFi connected");

  client.setServer(mqtt_server, 1883);
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Connecting MQTT...");
    if (client.connect("esp32_in")) {
      Serial.println("OK");
    } else {
      Serial.println("Fail");
      delay(1000);
    }
  }
}

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

  int val = digitalRead(PIR_PIN);

  if (val == HIGH && lastState == LOW) {
    Serial.println("IN detected");
    client.publish("gate/in", "1");
    delay(1000);
  }

  lastState = val;
  delay(100);
}