<?php

/**
 *    Copyright (C) 2015-2024 Deciso B.V.
 *
 *    All rights reserved.
 *
 *    Redistribution and use in source and binary forms, with or without
 *    modification, are permitted provided that the following conditions are met:
 *
 *    1. Redistributions of source code must retain the above copyright notice,
 *       this list of conditions and the following disclaimer.
 *
 *    2. Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *
 *    THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
 *    INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 *    AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 *    AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
 *    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 *    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 *    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 *    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 *    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 *    POSSIBILITY OF SUCH DAMAGE.
 *
 */

namespace OPNsense\CaptivePortal\Api;

use OPNsense\Base\ApiControllerBase;
use OPNsense\Core\Backend;
use OPNsense\CaptivePortal\CaptivePortal;

/**
 * Class SessionController
 * @package OPNsense\CaptivePortal
 */
class SessionController extends ApiControllerBase
{
    /**
     * list client sessions
     * @param int $zoneid zone number
     * @return array|mixed
     */
    public function listAction($zoneid = 0)
    {
        $mdlCP = new CaptivePortal();
        $cpZone = $mdlCP->getByZoneID($zoneid);
        if ($cpZone != null) {
            $allClientsRaw = (new Backend())->configdpRun("captiveportal list_clients", [$cpZone->zoneid]);
            return json_decode($allClientsRaw ?? '', true);
        } else {
            // illegal zone, return empty response
            return [];
        }
    }

    /**
     * search through connected clients
     */
    public function searchAction()
    {
        $selected_zones = $this->request->get('selected_zones');
        $records = json_decode((new Backend())->configdRun("captiveportal list_clients") ?? '', true);

        $response = $this->searchRecordsetBase($records, null, 'userName', function ($key) use ($selected_zones) {
            return empty($selected_zones) || in_array($key['zoneid'], $selected_zones);
        });

        return $response;
    }

    /**
     * return list of available zones
     * @return array available zones
     */
    public function zonesAction()
    {
        $response = [];
        $mdlCP = new CaptivePortal();
        foreach ($mdlCP->zones->zone->iterateItems() as $zone) {
            $response[(string)$zone->zoneid] = (string)$zone->description;
        }
        asort($response);
        return $response;
    }

    /**
     * disconnect a client
     * @param string|int $zoneid zoneid (deprecated)
     * @return array|mixed
     */
    public function disconnectAction($zoneid = '')
    {
        if ($this->request->isPost() && $this->request->hasPost('sessionId')) {
            $statusRAW = (new Backend())->configdpRun(
                "captiveportal disconnect",
                [$this->request->getPost('sessionId'), "Admin-Reset"]
            );
            $status = json_decode($statusRAW ?? '', true);
            if ($status != null) {
                return $status;
            } else {
                return ["status" => "Illegal response"];
            }
        }
        return [];
    }

    /**
     * connect a client
     * @param string|int $zoneid zoneid
     * @return array|mixed
     */
    public function connectAction($zoneid = 0)
    {
        $response = [];

        if ($this->request->isPost()) {
            // Get details from POST request
            $userName = $this->request->getPost("user", "striptags", null);
            $clientIp = $this->request->getPost("ip", "striptags", null);

            // Find details of the zone
            $mdlCP = new CaptivePortal();
            $cpZone = $mdlCP->getByZoneID($zoneid);
            if ($cpZone != null) {
                // Search for this client in the list of currently active sessions
                $allClients = $this->listAction($zoneid);
                foreach ($allClients as $connectedClient) {
                    if ($connectedClient['ipAddress'] == $clientIp) {
                        // Client is already active in this zone
                        $response = $connectedClient;
                        break;
                    }
                }

                // If the client isn't already active
                if (is_array($response) && count($response) == 0) {
                    // allow client to this captiveportal zone
                    $backend = new Backend();
                    $CPsession = $backend->configdpRun(
                        "captiveportal allow",
                        [
                            (string)$cpZone->zoneid,
                            $userName,
                            $clientIp,
                            'API'
                        ]
                    );

                    // Only return session if configd returned a valid json response
                    if ($CPsession != null) {
                        $response = $CPsession;
                    }
                }
            }
        }

        return $response;
    }
}
