<?php
include('include/headscript.php');

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

$userId = (int)($iduserlogin ?? 0);
if ($userId <= 0) {
    header("Location: login.php");
    exit;
}

// Ogni preferenza: colonna DB => 1 se checkbox spuntata, 0 altrimenti
$prefsMap = [
    'notify_export_email' => isset($_POST['notify_export_email']) ? 1 : 0,
    // in futuro: 'notify_altra_cosa' => isset($_POST['notify_altra_cosa']) ? 1 : 0,
];

try {
    $sets = [];
    $params = [];
    foreach ($prefsMap as $col => $val) {
        $sets[] = "`{$col}` = :{$col}";
        $params[$col] = $val;
    }
    $params['id'] = $userId;

    $sql = "UPDATE auth_users SET " . implode(', ', $sets) . " WHERE id = :id";
    $stmt = $pdo->prepare($sql);
    $stmt->execute($params);

    header("Location: notification_settings.php?saved=1");
    exit;
} catch (Exception $e) {
    error_log("Notification prefs update error: " . $e->getMessage());
    header("Location: notification_settings.php?saved=0");
    exit;
}