<?php
/** stations.php — JSON autocomplete for station search. */
require __DIR__ . '/app/config.php';
header('Content-Type: application/json; charset=utf-8');

$q = trim($_GET['q'] ?? '');
if (mb_strlen($q) < 2) { echo '[]'; exit; }

$like = '%' . $q . '%';
$st = db()->prepare(
    'SELECT code, name FROM stations
     WHERE name LIKE ? OR code LIKE ?
     ORDER BY (code = ?) DESC, CHAR_LENGTH(name) ASC
     LIMIT 10');
$st->execute([$like, $like, strtoupper($q)]);
echo json_encode($st->fetchAll(), JSON_UNESCAPED_UNICODE);