<?php
/*
 * sysPass
 *
 * @author nuxsmin
 * @link https://syspass.org
 * @copyright 2012-2022, Rubén Domínguez nuxsmin@$syspass.org
 *
 * This file is part of sysPass.
 *
 * sysPass 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.
 *
 * sysPass 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 sysPass.  If not, see <http://www.gnu.org/licenses/>.
 */

namespace SP\Domain\Import\Services;

use DOMElement;
use DOMXPath;
use Exception;
use SP\Core\Events\Event;
use SP\Core\Events\EventMessage;
use SP\Core\Exceptions\SPException;
use SP\DataModel\CategoryData;
use SP\DataModel\ClientData;
use SP\Domain\Account\Services\AccountRequest;
use SP\Domain\Import\ImportInterface;
use SP\Util\Filter;

defined('APP_ROOT') || die();

/**
 * Esta clase es la encargada de importar cuentas desde KeePass
 */
final class KeepassImport extends XmlImportBase implements ImportInterface
{
    private array $items = [];

    /**
     * Iniciar la importación desde KeePass
     *
     * @throws SPException
     */
    public function doImport(): ImportInterface
    {
        $this->eventDispatcher->notifyEvent(
            'run.import.keepass',
            new Event($this, EventMessage::factory()->addDescription(__u('KeePass XML Import')))
        );

        $this->process();

        return $this;
    }

    /**
     * Obtener los grupos y procesar lan entradas de KeePass.
     *
     * @throws SPException
     */
    private function process(): void
    {
        $clientId = $this->addClient(new ClientData(null, 'KeePass'));

        $this->eventDispatcher->notifyEvent(
            'run.import.keepass.process.client',
            new Event($this, EventMessage::factory()->addDetail(__u('Client added'), 'KeePass'))
        );

        $this->getGroups();

        $this->getEntries();

        /** @var AccountRequest[] $group */
        foreach ($this->items as $group => $entry) {
            try {
                $categoryId = $this->addCategory(new CategoryData(null, $group, 'KeePass'));

                $this->eventDispatcher->notifyEvent(
                    'run.import.keepass.process.category',
                    new Event($this, EventMessage::factory()->addDetail(__u('Category imported'), $group))
                );

                if (count($entry) > 0) {
                    foreach ($entry as $account) {
                        $account->categoryId = $categoryId;
                        $account->clientId = $clientId;

                        $this->addAccount($account);

                        $this->eventDispatcher->notifyEvent(
                            'run.import.keepass.process.account',
                            new Event(
                                $this,
                                EventMessage::factory()
                                    ->addDetail(__u('Account imported'), $account->name)
                                    ->addDetail(__u('Category'), $group)
                            )
                        );
                    }
                }
            } catch (Exception $e) {
                processException($e);

                $this->eventDispatcher->notifyEvent(
                    'exception',
                    new Event($e)
                );
            }
        }
    }

    /**
     * Gets the groups found
     */
    private function getGroups(): void
    {
        $DomXpath = new DOMXPath($this->xmlDOM);
        $tags = $DomXpath->query('/KeePassFile/Root/Group//Group');

        /** @var DOMElement[] $tags */
        foreach ($tags as $tag) {
            if ($tag->nodeType === 1) {
                $groupName = $DomXpath->query($tag->getNodePath().'/Name')
                    ->item(0)
                    ->nodeValue;

                if (!isset($groups[$groupName])) {
                    $this->items[$groupName] = [];
                }
            }
        }
    }

    /**
     * Gets the entries found
     */
    private function getEntries(): void
    {
        $DomXpath = new DOMXPath($this->xmlDOM);
        $tags = $DomXpath->query('/KeePassFile/Root/Group//Entry[not(parent::History)]');

        /** @var DOMElement[] $tags */
        foreach ($tags as $tag) {
            if ($tag->nodeType === 1) {
                $path = $tag->getNodePath();
                $entryData = [];

                /** @var DOMElement $key */
                foreach ($DomXpath->query($path.'/String/Key') as $key) {
                    $value = $DomXpath->query($key->getNodePath().'/../Value')
                        ->item(0)
                        ->nodeValue;

                    $entryData[$key->nodeValue] = $value;
                }

                $groupName = $DomXpath->query($path.'/../Name')
                    ->item(0)
                    ->nodeValue;

                $this->items[$groupName][] = $this->mapEntryToAccount($entryData);
            }
        }
    }

    private function mapEntryToAccount(array $entry): AccountRequest
    {
        $accountRequest = new AccountRequest();
        $accountRequest->name = isset($entry['Title']) ? Filter::getString($entry['Title']) : '';
        $accountRequest->login = isset($entry['UserName']) ? Filter::getString($entry['UserName']) : '';
        $accountRequest->pass = $entry['Password'] ?? '';
        $accountRequest->url = isset($entry['URL']) ? Filter::getString($entry['URL']) : '';
        $accountRequest->notes = isset($entry['Notes']) ? Filter::getString($entry['Notes']) : '';

        return $accountRequest;
    }
}