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

LiquidCrystal lcd(17,16,4,0,2,15);

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

WiFiClient espClient;
PubSubClient client(espClient);

void setup_wifi() {
  delay(10);
  WiFi.begin(ssid, password);

  lcd.clear();
  lcd.print("Connecting WiFi");

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

void reconnect() {
  while (!client.connected()) {
    if (client.connect("ESP32_Client")) {
      // Connected
    } else {
      delay(5000);
    }
  }
}

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

  // ✅ 1. تشغيل LCD
  lcd.begin(16, 2);
  lcd.print("LCD Ready!");

  delay(2000);
  lcd.clear();
  lcd.print("WiFi Setup...");

  // ✅ 2. تشغيل WiFi
  setup_wifi();
  lcd.clear();
  lcd.print("WiFi Connected");

  // ✅ 3. تشغيل MQTT
  client.setServer(mqtt_server, 1883);
  lcd.setCursor(0,1);
  lcd.print("MQTT Ready");
}

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

  // 🟦 كل 10 ثواني بعدي مسج
  client.publish("heartbeat", "I'm tired!");

  // 🟦 عرض رسالة على الـ LCD
  lcd.clear();
  lcd.print("Sent MQTT msg");

  delay(10000);
}