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

// Wi-Fi sozlamalari
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// MQTT broker manzili
const char* mqtt_server = "broker.hivemq.com";

// Pinlar
#define LDR_PIN 34     // Analog pin (LDR)
#define RELAY_PIN 5    // Raqamli pin (Rele)

// Obyektlar
WiFiClient espClient;
PubSubClient client(espClient);

bool relayState = false;

void setup_wifi() {
  Serial.print("WiFiga ulanmoqda...");
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nWiFiga ulandi!");
  Serial.print("IP manzil: ");
  Serial.println(WiFi.localIP());
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("MQTT brokerga ulanmoqda...");
    String clientId = "ESP32Client-" + String(random(0xffff), HEX);
    if (client.connect(clientId.c_str())) {
      Serial.println("MQTT brokerga ulandi!");
    } else {
      Serial.print("Xatolik, kod: ");
      Serial.println(client.state());
      delay(5000);
    }
  }
}

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

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

  int ldrValue = analogRead(LDR_PIN); // 0 - 4095
  Serial.print("LDR qiymati: ");
  Serial.println(ldrValue);

  // Qorong'i aniqlash (masalan, < 1500)
  if (ldrValue < 1500 && !relayState) {
    digitalWrite(RELAY_PIN, HIGH);
    relayState = true;
    client.publish("esp32/rele", "Yuborildi -> Chiroq yondi");
    Serial.println("Yuborildi -> Chiroq yondi");
  } else if (ldrValue >= 1500 && relayState) {
    digitalWrite(RELAY_PIN, LOW);
    relayState = false;
    client.publish("esp32/rele", "Yuborildi -> Chiroq o’chdi");
    Serial.println("Yuborildi -> Chiroq o’chdi");
  }

  delay(3000);
}