#include <WiFi.h>
#include <HTTPClient.h>

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

String FIREBASE_PROJECT_ID = "stock-5";
String COLLECTION_PATH = "iot_control";
String DOCUMENT_ID = "led1";

int ledPin = 13;

void setup() {
  Serial.begin(115200);
  pinMode(ledPin, OUTPUT);

  WiFi.begin(ssid, password);
  Serial.print("Connecting to WiFi");
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    delay(500);
  }
  Serial.println("\nConnected!");
}

void loop() {
  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;
    String url = "https://firestore.googleapis.com/v1/projects/" +
                 FIREBASE_PROJECT_ID + "/databases/(default)/documents/" +
                 COLLECTION_PATH + "/" + DOCUMENT_ID;

    http.begin(url);
    int httpCode = http.GET();

    if (httpCode == 200) {
      String payload = http.getString();
      if (payload.indexOf("\"ON\"") > 0) {
        digitalWrite(ledPin, HIGH);
        Serial.println("🔥 LED = ON");
      } else {
        digitalWrite(ledPin, LOW);
        Serial.println("💤 LED = OFF");
      }
    } else {
      Serial.println("HTTP Error: " + String(httpCode));
    }
    http.end();
  }
  delay(3000);  // Poll Firestore every 3 seconds
}