<?php
/**
 * getAuthorityCount.php - Zählt DSpace-Datensätze für einen Authority-Begriff
 * 
 * Parameter:
 * - authType: 'Subject' oder 'Person'
 * - query: Der zu suchende Begriff (exakte Übereinstimmung)
 * 
 * Response: JSON mit count
 * 
 * Beispiel:
 * curl "https://bibb-dspace.bibb.de/DSpaceAPI/getAuthorityCount.php?authType=Subject&query=Berufsbildung"
 * => {"query":"Berufsbildung","authType":"Subject","count":42}
 */

header('Content-Type: application/json; charset=utf-8');
header('Access-Control-Allow-Origin: *');

// IP-Prüfung
require_once __DIR__ . '/checkAccess.php';

// Parameter
$authType = isset($_GET['authType']) ? trim($_GET['authType']) : '';
$query    = isset($_GET['query'])    ? trim($_GET['query'])    : '';

// Validierung
$allowedTypes = array('Subject', 'Person');
if (!in_array($authType, $allowedTypes)) {
    http_response_code(400);
    echo json_encode(array('error' => 'Invalid authType. Allowed: Subject, Person'));
    exit;
}

if (strlen($query) === 0) {
    http_response_code(400);
    echo json_encode(array('error' => 'Missing parameter: query'));
    exit;
}

// Solr-Feld je nach authType
switch ($authType) {
    case 'Subject':
        $queryField = 'dc.subject.other';
        break;
    case 'Person':
        $queryField = 'dc.contributor.author';
        break;
}

// Query bereinigen
$query = urldecode($query);
$query = str_replace("'", "", $query);

// Solr-Abfrage
$solr_baseurl = "http://localhost:8080/solr/search/query?";
$solr_query   = $queryField . ':' . $query;
$rows         = "&rows=10000";
$fl           = "&fl=" . $queryField;
$solr_URL     = $solr_baseurl . "wt=phps" . $fl . $rows . "&q=" . urlencode($solr_query . " AND withdrawn:false");

$context = stream_context_create(array(
    'http' => array('timeout' => 10)
));

$response = @file_get_contents($solr_URL, false, $context);

if ($response === false) {
    http_response_code(500);
    echo json_encode(array('error' => 'Solr query failed'));
    exit;
}

$result = unserialize($response);

if (!isset($result['response']['docs'])) {
    echo json_encode(array(
        'query'    => $query,
        'authType' => $authType,
        'count'    => 0
    ));
    exit;
}

// Exakte Treffer zählen (analog zu DSpaceCountModel)
$count = 0;
foreach ($result['response']['docs'] as $entry) {
    foreach ($entry as $hit) {
        if (!is_array($hit)) {
            $hit = array($hit);
        }
        foreach ($hit as $h) {
            if ($authType === "Subject") {
                if (strcmp($query, trim($h)) === 0) {
                    $count++;
                }
            } else {
                // Person: Authority-ID in eckigen Klammern abschneiden
                $name = trim(substr($h, 0, strpos($h, "[")));
                if (strlen($name) === 0) {
                    $name = trim($h);
                }
                if (strcmp($query, $name) === 0) {
                    $count++;
                }
            }
        }
    }
}

echo json_encode(array(
    'query'    => $query,
    'authType' => $authType,
    'count'    => $count
));
?>