<?php

/**
 * VlansController.php
 *
 * -Description-
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 * @link       https://www.librenms.org
 *
 * @copyright  2020 Tony Murray
 * @author     Tony Murray <murraytony@gmail.com>
 */

namespace App\Http\Controllers\Device\Tabs;

use App\Models\Device;
use App\Models\PortVlan;
use App\Models\Vlan;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Gate;
use Illuminate\Support\Facades\Validator;
use LibreNMS\Interfaces\UI\DeviceTab;

class VlansController implements DeviceTab
{
    public function visible(Device $device): bool
    {
        return Gate::allows('viewAny', Vlan::class) && $device->vlans()->exists();
    }

    public function slug(): string
    {
        return 'vlans';
    }

    public function icon(): string
    {
        return 'fa-tasks';
    }

    public function name(): string
    {
        return __('VLANs');
    }

    public function data(Device $device, Request $request): array
    {
        // Validate filter inputs
        Validator::validate($request->all(), [
            'searchVlanNumber' => 'string|nullable|max:100',
            'searchVlanName' => 'string|nullable|max:255',
        ]);

        $searchVlanNumber = $request->query->get('searchVlanNumber');
        $searchVlanName = $request->query->get('searchVlanName');

        return [
            'vlans' => self::getVlans(
                $device,
                $searchVlanNumber,
                $searchVlanName
            ),
            'searchVlanNumber' => $searchVlanNumber,
            'searchVlanName' => $searchVlanName,
            'error' => null,
            'submenu' => [
                [
                    ['name' => 'Basic', 'url' => ''],
                ],
                'Graphs' => [
                    ['name' => 'Bits', 'url' => 'bits'],
                    ['name' => 'Unicast Packets', 'url' => 'upkts'],
                    ['name' => 'Non-Unicast Packets', 'url' => 'nupkts'],
                    ['name' => 'Errors', 'url' => 'errors'],
                ],
            ],
        ];
    }

    private static function getVlans(
        Device $device,
        $searchVlanNumber = null,
        $searchVlanName = null
    ) {
        // port.device needed to prevent loading device multiple times
        $query = PortVlan::where('ports_vlans.device_id', $device->device_id)
            ->join('vlans', function ($join): void {
                $join
                ->on('ports_vlans.vlan', 'vlans.vlan_vlan')
                ->on('vlans.device_id', 'ports_vlans.device_id');
            })
            ->join('ports', function ($join): void {
                $join
                ->on('ports_vlans.port_id', 'ports.port_id');
            })
            ->with(['port.device'])
            ->select('ports_vlans.*', 'vlans.vlan_name');

        // Apply VLAN number filter
        if ($searchVlanNumber) {
            $query->where(
                'ports_vlans.vlan',
                '=',
                $searchVlanNumber
            );
        }

        // Apply VLAN name filter
        if ($searchVlanName) {
            $query->where(
                'vlans.vlan_name',
                'LIKE',
                '%' . $searchVlanName . '%'
            );
        }

        $portVlan = $query
            ->orderBy('vlan_vlan')
            ->orderBy('ports.ifName')
            ->orderBy('ports.ifDescr')
            ->get()
            ->sortBy(['vlan', 'port']);

        $data = $portVlan->groupBy('vlan');

        return $data;
    }
}
