<?php
ini_set('display_errors', 0);
error_reporting(0);
require_once __DIR__ . '/config.php';
header('Content-Type: application/json; charset=utf-8');

if (empty($_SERVER['HTTP_X_REQUESTED_WITH']) || strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) != 'xmlhttprequest') {
    http_response_code(403);
    exit(json_encode(['error' => 'Forbidden']));
}

$user = checkAuth($pdo);
if (!$user) {
    http_response_code(401);
    exit(json_encode(['error' => 'Unauthorized']));
}

$id = isset($_GET['id']) ? (int)$_GET['id'] : 0;
if (!$id) {
    exit(json_encode(['error' => 'Invalid ID']));
}

$article = getLocalKnowledgeArticle($pdo, $id);
if (!$article) {
    exit(json_encode(['error' => 'Article not found']));
}

$documents = [];
if ($article['documents']) {
    $docs = json_decode($article['documents'], true);
    if (is_array($docs)) {
        foreach ($docs as $doc) {
            $documents[] = [
                'id' => $doc['id'],
                'name' => $doc['name'],
                'mime' => $doc['mime'],
                'url' => 'get_document.php?kid=' . $id . '&doc=' . $doc['id']
            ];
        }
    }
}

echo json_encode([
    'id' => $article['id'],
    'title' => $article['title'],
    'content' => $article['content'],
    'documents' => $documents,
    'date' => $article['updated_at'] ?? $article['created_at']
]);
exit;