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

// Wi-Fi credentials
#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASSWORD ""

// Firebase project URL and API Key
#define DATABASE_URL "https://hantu-815c4-default-rtdb.asia-southeast1.firebasedatabase.app"
#define API_KEY "AIzaSyBRS2GWYraVW0XVHibGg5EQe1zx7r-5fWU"

void setup() {
  Serial.begin(115200);
  
  // Connect to Wi-Fi
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");

  // Set initial value in Firebase
  sendDataToFirebase("/example/data", 123);
}

void loop() {
  // Read the value from Firebase
  int value = getDataFromFirebase("/example/data");
  Serial.printf("Data: %d\n", value);

  delay(2000); // Wait for 2 seconds before reading again
}

void sendDataToFirebase(String path, int value) {
  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;
    String url = String(DATABASE_URL) + path + ".json?auth=" + API_KEY;

    http.begin(url);
    http.addHeader("Content-Type", "application/json");

    String payload = String("{\"value\":") + value + "}";
    int httpResponseCode = http.PUT(payload);

    if (httpResponseCode > 0) {
      Serial.printf("HTTP Response code: %d\n", httpResponseCode);
    } else {
      Serial.printf("Error code: %d\n", httpResponseCode);
    }

    http.end();
  } else {
    Serial.println("WiFi Disconnected");
  }
}

int getDataFromFirebase(String path) {
  int value = 0;

  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;
    String url = String(DATABASE_URL) + path + ".json?auth=" + API_KEY;

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

    if (httpResponseCode > 0) {
      String payload = http.getString();
      Serial.println(payload);
      value = payload.toInt();
    } else {
      Serial.printf("Error code: %d\n", httpResponseCode);
    }

    http.end();
  } else {
    Serial.println("WiFi Disconnected");
  }

  return value;
}