<?php
/**
 * app/modules/connections/save.php
 *
 * Speichert / aktualisiert eine Netzwerkverbindung
 * (Basis-Implementierung - kann erweitert werden)
 */

// Nur POST
if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    header('Location: ?module=connections&action=list');
    exit;
}

// =========================
// Daten einlesen
// =========================
$connId = (int)($_POST['id'] ?? 0);
$portAType = $_POST['port_a_type'] ?? 'device';
$portAId = (int)($_POST['port_a_id'] ?? 0);
$portBType = $_POST['port_b_type'] ?? 'device';
$portBId = (int)($_POST['port_b_id'] ?? 0);
$vlanConfig = $_POST['vlan_config'] ?? '';
$comment = trim($_POST['comment'] ?? '');

// =========================
// Validierung (einfach)
// =========================
$errors = [];

if ($portAId <= 0 || $portBId <= 0) {
    $errors[] = "Beide Ports sind erforderlich";
}

if (!empty($errors)) {
    $_SESSION['error'] = implode(', ', $errors);
    $redirectUrl = $connId ? "?module=connections&action=edit&id=$connId" : "?module=connections&action=list";
    header("Location: $redirectUrl");
    exit;
}

// =========================
// In DB speichern
// =========================
$vlanJson = $vlanConfig ? json_encode(explode(',', $vlanConfig)) : null;

if ($connId > 0) {
    // UPDATE
    $sql->set(
        "UPDATE connections SET port_a_type = ?, port_a_id = ?, port_b_type = ?, port_b_id = ?, vlan_config = ?, comment = ? WHERE id = ?",
        "siisisi",
        [$portAType, $portAId, $portBType, $portBId, $vlanJson, $comment, $connId]
    );
} else {
    // INSERT
    $sql->set(
        "INSERT INTO connections (port_a_type, port_a_id, port_b_type, port_b_id, vlan_config, comment) VALUES (?, ?, ?, ?, ?, ?)",
        "siisis",
        [$portAType, $portAId, $portBType, $portBId, $vlanJson, $comment]
    );
}

$_SESSION['success'] = "Verbindung gespeichert";

// =========================
// Redirect
// =========================
header('Location: ?module=connections&action=list');
exit;