#include <WiFi.h>
#include <SPI.h>
#include <MFRC522.h>
//#include <Firebase_ESP_Client.h>
#include <FirebaseESP32.h>
#include "addons/TokenHelper.h"
#include "addons/RTDBHelper.h"

#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASSWORD ""

#define API_KEY "AIzaSyBolGHWLA9oI03BAI-XPq3iddw-Y3iRhso"
#define DATABASE_URL "https://studentssproj-default-rtdb.firebaseio.com/"

FirebaseData fbdo;
FirebaseAuth auth;
FirebaseConfig config;

#define SS_PIN 5
#define RST_PIN 22

MFRC522 rfid(SS_PIN, RST_PIN);

int cardCount = 0;

void setup() {

  Serial.begin(115200);

  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  Serial.print("Connecting WiFi");

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

  Serial.println();
  Serial.println("WiFi Connected");

  config.api_key = API_KEY;
  config.database_url = DATABASE_URL;

  config.signer.test_mode = true;
  Firebase.begin(&config, &auth);
  Firebase.reconnectWiFi(true);



  SPI.begin();
  rfid.PCD_Init();

  Serial.println("Scan RFID card...");
}

void loop() {

  if (!rfid.PICC_IsNewCardPresent()) return;
  if (!rfid.PICC_ReadCardSerial()) return;

  String cardID = "";

  for (byte i = 0; i < rfid.uid.size; i++) {
    cardID += String(rfid.uid.uidByte[i], HEX);
  }

  cardID.toUpperCase();

  Serial.print("Card ID: ");
  Serial.println(cardID);

  cardCount++;

  String path = "/cards/card" + String(cardCount);
  Serial.println("path is : " + path);

  if (Firebase.ready()) {

  if (Firebase.setString(fbdo, path + "/card_id", cardID)) {

    Serial.println("Card saved to Firebase");

  } else {

    Serial.println("Firebase Error");
    Serial.println(fbdo.errorReason());

  }

}
  delay(3000);
}