<?php

namespace hmcsw\service\authorization\auth\twoFactor\types\fido2;

use hmcsw\hmcsw4;
use Firebase\JWT\JWT;
use hmcsw\utils\UnitUtil;
use hmcsw\utils\ByteBuffer;
use hmcsw\service\cache\CacheService;
use Webauthn\Exception\WebauthnException;
use Webauthn\MetadataService\Statement\MetadataStatement;

class MetadataStatementRepository extends Fido2 implements \Webauthn\MetadataService\MetadataStatementRepository
{
  public function findOneByAAGUID (string $aaguid): ?MetadataStatement
  {
    foreach (self::getMetadataService() as $metadata) {
      if ($metadata['aaguid'] === $aaguid) {
        return MetadataStatement::createFromArray($metadata['metadataStatement']);
      }
    }
    return null;
  }


  protected static function getMetadataService (): array
  {
    return self::queryFidoMetaDataService();
  }

  public static function queryFidoMetaDataService (): array
  {
    $cache = CacheService::get("metaDataStatement", false, true);
    if($cache['success']){
      return $cache['response'];
    }

    $devices = [];


    $url = 'https://mds.fidoalliance.org/';
    $raw = null;
    if (\function_exists('curl_init')) {
      $ch = \curl_init($url);
      \curl_setopt($ch, CURLOPT_HEADER, false);
      \curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
      \curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
      \curl_setopt($ch, CURLOPT_USERAGENT, hmcsw4::getUserAgent());
      $raw = \curl_exec($ch);
      \curl_close($ch);
    } else {
      $raw = \file_get_contents($url);
    }

    if (!\is_string($raw)) {
      throw new WebAuthnException('Unable to query FIDO Alliance Metadata Service');
    }

    $jwt = \explode('.', $raw);
    if (\count($jwt) !== 3) {
      throw new WebAuthnException('Invalid JWT from FIDO Alliance Metadata Service');
    }

    [$header, $payload, $hash] = $jwt;

    $payload = ByteBuffer::fromBase64Url($payload)->getJson();

    $count = 0;
    if (\is_object($payload) && \property_exists($payload, 'entries') && \is_array($payload->entries)) {
      foreach ($payload->entries as $entry) {

        if(isset($entry->aaguid)){
          $devices[$entry->aaguid] = $entry;
        }
      }
    }


    CacheService::save("metaDataStatement", json_encode($devices), false, time()+(60*60*24));

    return json_decode(json_encode($devices), true);
  }
}