<?php

/*
 * Copyright (C) 2025 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\Kea\Api;

use OPNsense\Base\ApiControllerBase;
use OPNsense\Core\Backend;
use OPNsense\Core\Config;
use OPNsense\Base\UserException;

abstract class LeasesController extends ApiControllerBase
{
    protected $configd_fetch_leases = null;

    public function searchAction()
    {
        $selected_interfaces = $this->request->get('selected_interfaces');

        $backend = new Backend();

        if (empty($this->configd_fetch_leases)) {
            $records = [];
        } else {
            $leases = json_decode($backend->configdpRun($this->configd_fetch_leases), true) ?? [];
            $records = $leases['records'] ?? [];
        }

        $interfaces = [];

        $mac_db = json_decode($backend->configdRun('interface list macdb'), true) ?? [];

        $ifmap = [];
        foreach (Config::getInstance()->object()->interfaces->children() as $if => $if_props) {
            $ifmap[(string)$if_props->if] = [
                'descr' => (string)$if_props->descr ?: strtoupper($if),
                'key' => $if
            ];
        }

        $stats = [
            'active' => 0,
            'inactive' => 0,
            'total' => 0,
        ];

        foreach ($records as &$record) {
            // Stats
            $stats['total']++;
            $isActive = $record['state'] === 0;
            $stats[$isActive ? 'active' : 'inactive']++;

            // Interface
            $record['if_descr'] = '';
            $record['if_name'] = '';
            if (!empty($record['if']) && isset($ifmap[$record['if']])) {
                $record['if_descr'] = $ifmap[$record['if']]['descr'];
                $record['if_name'] = $ifmap[$record['if']]['key'];
                $interfaces[$ifmap[$record['if']]['key']] = $ifmap[$record['if']]['descr'];
            }
            // Vendor
            $mac = strtoupper(substr(str_replace(':', '', $record['hwaddr']), 0, 6));
            $record['mac_info'] = isset($mac_db[$mac]) ? $mac_db[$mac] : '';
        }

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

        $response['stats'] = $stats;
        $response['interfaces'] = $interfaces;
        return $response;
    }

    public function delLeaseAction($ips = null)
    {
        if (!$this->request->isPost()) {
            return ['status' => 'error', 'message' => gettext('Invalid request method')];
        } elseif (empty($ips)) {
            return ['status' => 'error', 'message' => gettext('Missing lease IP parameter')];
        }

        $results = json_decode((new Backend())->configdpRun('kea delete lease', [$ips]), true);

        if (!is_array($results) || empty($results)) {
            throw new UserException(gettext('Invalid backend response'));
        }

        if (!empty($results['failed'])) {
            throw new UserException(sprintf(
                gettext('Failed to delete lease(s): %s'),
                implode(', ', $results['failed'])
            ));
        }

        return ['status' => 'ok'];
    }
}
