<?php
/**
 * newSubject.php - Erstellt einen neuen Schlagwort-Eintrag
 *
 * Nutzt die CRUD-Klasse aus libAuthorities.php
 */
header('Content-Type: application/json; charset=utf-8');
include "db_connection.php";
include "libAuthorities.php";

// Parameter aus JavaScript (SubjectScript.js → CreateNewEntry)
$term           = isset($_POST['term'])           ? trim($_POST['term'])           : '';
$detailType     = isset($_POST['detailtype'])     ? trim($_POST['detailtype'])     : '';
$classification = isset($_POST['classification']) ? trim($_POST['classification']) : '';
$scopenote      = isset($_POST['scopenote'])      ? trim($_POST['scopenote'])      : '';

if (empty($term)) {
    echo json_encode(['status' => 400, 'message' => 'Bitte Schlagwort eingeben!']);
    exit();
}

try {
    $crud = new CRUD();

    // Normalisierten Descriptor-Text erzeugen (entspricht Anchor.Text in der DB)
    $desc         = $crud->prepare_desc($term);
    $completetext = $term;

    // Dubletten-Prüfung gegen Anchor.Text (normalisierte Form)
    $existing = $crud->checkDuplicateByNormalizedText('Subject', $desc);
    if ($existing > 0) {
        echo json_encode(['status' => 409, 'message' => 'Ein Schlagwort mit diesem Begriff existiert bereits']);
        exit();
    }

    // Neuen Eintrag erstellen
    $result = $crud->insertNewTerm('Subject', $term, $desc, $detailType, $classification, $scopenote, $completetext);

    echo json_encode([
        'status'  => 200,
        'message' => 'Schlagwort erfolgreich erstellt',
        'Anchor'  => $result['IDAnchor'],
        'Entry'   => $result['IDEntry'],
        'Linking' => $result['IDLinking']
    ]);

} catch (Exception $e) {
    echo json_encode(['status' => 500, 'message' => $e->getMessage()]);
}
?>