<?php
/**
 * app/modules/racks/save.php
 *
 * Speichert / aktualisiert ein Rack
 */

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

// =========================
// Daten einlesen
// =========================
$rackId = (int)($_POST['id'] ?? 0);
$name = trim($_POST['name'] ?? '');
$floorId = (int)($_POST['floor_id'] ?? 0);
$heightHe = (int)($_POST['height_he'] ?? 42);
$comment = trim($_POST['comment'] ?? '');

// =========================
// Validierung
// =========================
$errors = [];

if (empty($name)) {
    $errors[] = "Name ist erforderlich";
}

if ($floorId <= 0) {
    $errors[] = "Stockwerk ist erforderlich";
}

if ($heightHe < 1) {
    $errors[] = "Höhe muss mindestens 1 HE sein";
}

// Falls Fehler: zurück zum Edit-Formular
if (!empty($errors)) {
    $_SESSION['error'] = implode(', ', $errors);
    $redirectUrl = $rackId ? "?module=racks&action=edit&id=$rackId" : "?module=racks&action=edit";
    header("Location: $redirectUrl");
    exit;
}

// =========================
// In DB speichern
// =========================
if ($rackId > 0) {
    // UPDATE
    $sql->set(
        "UPDATE racks SET name = ?, floor_id = ?, height_he = ?, comment = ? WHERE id = ?",
        "siisi",
        [$name, $floorId, $heightHe, $comment, $rackId]
    );
} else {
    // INSERT
    $sql->set(
        "INSERT INTO racks (name, floor_id, height_he, comment) VALUES (?, ?, ?, ?)",
        "siis",
        [$name, $floorId, $heightHe, $comment]
    );
}

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

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