<?php
/**
 * modules/devices/save.php
 *
 * Speichert / aktualisiert ein Gerät
 * - Basisdaten
 * - Rack-Zuordnung
 * - Ports (automatisch aus Device-Type oder manuell)
 *
 * Erwartet POST (form-data ODER JSON)
 */

require_once __DIR__ . '/../../bootstrap.php';

// =========================
// Request prüfen
// =========================

if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    http_response_code(405);
    echo json_encode(['error' => 'Invalid request method']);
    exit;
}

// =========================
// Daten einlesen (JSON oder POST)
// =========================

$contentType = $_SERVER['CONTENT_TYPE'] ?? '';

if (str_contains($contentType, 'application/json')) {
    $data = json_decode(file_get_contents('php://input'), true) ?? [];
} else {
    $data = $_POST;
}

// =========================
// Basisfelder
// =========================

$deviceId        = isset($data['id']) ? (int)$data['id'] : null;
$name            = trim($data['name'] ?? '');
$comment         = trim($data['comment'] ?? '');
$deviceTypeId    = (int)($data['device_type_id'] ?? 0);
$rackId          = isset($data['rack_id']) ? (int)$data['rack_id'] : null;
$rackPositionHe  = isset($data['rack_position_he']) ? (int)$data['rack_position_he'] : null;
$rackHeightHe    = isset($data['rack_height_he']) ? (int)$data['rack_height_he'] : null;
$serialNumber    = trim($data['serial_number'] ?? '');
$portsData       = $data['ports'] ?? null;

// =========================
// Validierung
// =========================

$errors = [];

if ($name === '') {
    $errors[] = 'Name darf nicht leer sein';
}

$deviceType = $sql->single(
    "SELECT * FROM device_types WHERE id = ?",
    "i",
    [$deviceTypeId]
);

if (!$deviceType) {
    $errors[] = 'Ungültiger Gerätetyp';
}

if ($rackId !== null) {
    $rack = $sql->single(
        "SELECT * FROM racks WHERE id = ?",
        "i",
        [$rackId]
    );

    if (!$rack) {
        $errors[] = 'Ungültiges Rack';
    } elseif ($rackHeightHe !== null && $rackPositionHe !== null) {
        if ($rackPositionHe < 1 || ($rackPositionHe + $rackHeightHe - 1) > $rack['height_he']) {
            $errors[] = 'Gerät passt nicht ins Rack';
        }
    }
}

if ($errors) {
    http_response_code(400);
    echo json_encode([
        'status' => 'error',
        'errors' => $errors
    ]);
    exit;
}

// =========================
// Device speichern
// =========================

if ($deviceId) {

    $sql->set(
        "
        UPDATE devices SET
            name = ?,
            comment = ?,
            device_type_id = ?,
            rack_id = ?,
            rack_position_he = ?,
            rack_height_he = ?,
            serial_number = ?
        WHERE id = ?
        ",
        "ssiiii si",
        [
            $name,
            $comment,
            $deviceTypeId,
            $rackId,
            $rackPositionHe,
            $rackHeightHe,
            $serialNumber,
            $deviceId
        ]
    );

} else {

    $deviceId = $sql->set(
        "
        INSERT INTO devices
            (name, comment, device_type_id, rack_id, rack_position_he, rack_height_he, serial_number)
        VALUES
            (?, ?, ?, ?, ?, ?, ?)
        ",
        "ssiiiii",
        [
            $name,
            $comment,
            $deviceTypeId,
            $rackId,
            $rackPositionHe,
            $rackHeightHe,
            $serialNumber
        ],
        true
    );

    // =========================
    // Ports vom Device-Type übernehmen (nur bei NEU)
    // =========================

    $typePorts = $sql->get(
        "
        SELECT name, port_type_id
        FROM device_type_ports
        WHERE device_type_id = ?
        ORDER BY id
        ",
        "i",
        [$deviceTypeId]
    );

    foreach ($typePorts as $tp) {
        $sql->set(
            "
            INSERT INTO device_ports
                (device_id, name, port_type_id)
            VALUES
                (?, ?, ?)
            ",
            "isi",
            [
                $deviceId,
                $tp['name'],
                $tp['port_type_id']
            ]
        );
    }
}

// =========================
// Ports aktualisieren (optional, z. B. VLAN / Mode)
// =========================

if (is_array($portsData)) {
    foreach ($portsData as $portId => $port) {

        $status = $port['status'] ?? 'active';
        $mode   = $port['mode'] ?? null;
        $vlan   = isset($port['vlan_config']) ? json_encode($port['vlan_config']) : null;

        $sql->set(
            "
            UPDATE device_ports SET
                status = ?,
                mode = ?,
                vlan_config = ?
            WHERE id = ? AND device_id = ?
            ",
            "sssii",
            [
                $status,
                $mode,
                $vlan,
                (int)$portId,
                $deviceId
            ]
        );
    }
}

// =========================
// Antwort
// =========================

echo json_encode([
    'status' => 'ok',
    'id' => $deviceId
]);