<?php
/**
 * MageSpecialist
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://opensource.org/licenses/osl-3.0.php
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to info@magespecialist.it so we can send you a copy immediately.
 *
 * @category   MSP
 * @package    MSP_TwoFactorAuth
 * @copyright  Copyright (c) 2017 Skeeller srl (http://www.magespecialist.it)
 * @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */

namespace MSP\TwoFactorAuth\Controller\Adminhtml\Duo;

use Magento\Backend\Model\Auth\Session;
use Magento\Backend\App\Action;
use Magento\Framework\DataObjectFactory;
use Magento\Framework\View\Result\PageFactory;
use MSP\TwoFactorAuth\Model\AlertInterface;
use MSP\TwoFactorAuth\Api\TfaInterface;
use MSP\TwoFactorAuth\Api\TfaSessionInterface;
use MSP\TwoFactorAuth\Controller\Adminhtml\AbstractAction;
use MSP\TwoFactorAuth\Model\Provider\Engine\DuoSecurity;

/**
 * @SuppressWarnings(PHPMD.CamelCaseMethodName)
 */
class Authpost extends AbstractAction
{
    /**
     * @var TfaInterface
     */
    private $tfa;

    /**
     * @var Session
     */
    private $session;

    /**
     * @var PageFactory
     */
    private $pageFactory;

    /**
     * @var TfaSessionInterface
     */
    private $tfaSession;

    /**
     * @var DuoSecurity
     */
    private $duoSecurity;

    /**
     * @var DataObjectFactory
     */
    private $dataObjectFactory;

    /**
     * @var AlertInterface
     */
    private $alert;

    /**
     * @var Action\Context
     */
    private $context;

    /**
     * Authpost constructor.
     * @param Action\Context $context
     * @param Session $session
     * @param PageFactory $pageFactory
     * @param DuoSecurity $duoSecurity
     * @param TfaSessionInterface $tfaSession
     * @param DataObjectFactory $dataObjectFactory
     * @param AlertInterface $alert
     * @param TfaInterface $tfa
     */
    public function __construct(
        Action\Context $context,
        Session $session,
        PageFactory $pageFactory,
        DuoSecurity $duoSecurity,
        TfaSessionInterface $tfaSession,
        DataObjectFactory $dataObjectFactory,
        AlertInterface $alert,
        TfaInterface $tfa
    ) {
        parent::__construct($context);
        $this->tfa = $tfa;
        $this->session = $session;
        $this->pageFactory = $pageFactory;
        $this->tfaSession = $tfaSession;
        $this->duoSecurity = $duoSecurity;
        $this->dataObjectFactory = $dataObjectFactory;
        $this->alert = $alert;
        $this->context = $context;
    }

    /**
     * Get current user
     * @return \Magento\User\Model\User|null
     */
    private function getUser()
    {
        return $this->session->getUser();
    }

    /**
     * @inheritdoc
     */
    public function execute()
    {
        $user = $this->getUser();

        if ($this->duoSecurity->verify($user, $this->dataObjectFactory->create([
            'data' => $this->getRequest()->getParams(),
        ]))) {
            $this->tfa->getProvider(DuoSecurity::CODE)->activate($user->getId());
            $this->tfaSession->grantAccess();
            return $this->_redirect($this->context->getBackendUrl()->getStartupPageUrl());
        } else {
            $this->alert->event(
                'MSP_TwoFactorAuth',
                'DuoSecurity invalid auth',
                AlertInterface::LEVEL_WARNING,
                $user->getUserName()
            );

            return $this->_redirect('*/*/auth');
        }
    }

    /**
     * Check if admin has permissions to visit related pages
     *
     * @return bool
     */
    protected function _isAllowed()
    {
        // Do not check for activation
        $user = $this->getUser();

        return
            $user &&
            $this->tfa->getProviderIsAllowed($user->getId(), DuoSecurity::CODE);
    }
}