<?php
require_once("../../classes/TopicData.php");
require_once("../../classes/Config.php");

error_reporting(E_ALL);
ini_set('display_errors', 1);

// Validate and sanitize input
$displayName = htmlspecialchars($_POST['displayName']);
$subjectId = $_POST['subjectId'];
$description = $_POST['description'];
$icon = $_POST['icon'];
$article = $_POST['article'];

// Generate ID from displayName
$id = strtolower(preg_replace('/[^A-Za-z0-9]/', '', $displayName));

// Create topic
$topic = TopicData::createNew(
    $id,
    $subjectId,
    $displayName,
    $icon,
    $description,
    [], // empty related topics array
    $article
);

if (!$topic || !$topic->save()) {
    http_response_code(400);
    echo json_encode(['success' => false, 'message' => 'Failed to create topic']);
    exit();
}

echo json_encode(['success' => true]);