<?php
ini_set('display_errors', 1);
error_reporting(E_ALL);

header('Content-Type: application/json');

include('include/headscript.php');

try {
    $id = isset($_GET['id']) ? (int)$_GET['id'] : 0;

    if ($id <= 0) {
        echo json_encode(['success' => false, 'message' => 'Invalid parameter id.']);
        exit;
    }

    $db = DBHandlerSelect::getInstance();
    $pdo = $db->getConnection();

    $stmt = $pdo->prepare("
        SELECT id, line_id, position, short_label, label, icon
        FROM production_line_params
        WHERE id = :id
    ");
    $stmt->execute([':id' => $id]);
    $param = $stmt->fetch(PDO::FETCH_ASSOC);

    if (!$param) {
        echo json_encode(['success' => false, 'message' => 'Parameter not found.']);
        exit;
    }

    echo json_encode([
        'success' => true,
        'param'   => $param
    ]);
} catch (Exception $e) {
    echo json_encode([
        'success' => false,
        'message' => 'Server error: ' . $e->getMessage()
    ]);
}