<?php
/*
    Flexisip Account Manager is a set of tools to manage SIP accounts.
    Copyright (C) 2020 Belledonne Communications SARL, All rights reserved.

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero 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 Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

namespace App\Helpers;

use Illuminate\Support\Str;

use App\Account;
use App\DigestNonce;

use League\CommonMark\Environment;
use League\CommonMark\Extension\HeadingPermalink\HeadingPermalinkExtension;
use League\CommonMark\Extension\TableOfContents\TableOfContentsExtension;
use League\CommonMark\MarkdownConverter;

class Utils
{
    public static function generateNonce(): string
    {
        return Str::random(32);
    }

    public static function generateValidNonce(Account $account): string
    {
        $nonce = new DigestNonce;
        $nonce->account_id = $account->id;
        $nonce->nonce = Utils::generateNonce();
        $nonce->save();

        return $nonce->nonce;
    }

    public static function bchash(string $username, string $domain, string $password, string $algorithm = 'MD5')
    {
        $algos = ['MD5' => 'md5', 'SHA-256' => 'sha256'];

        return hash($algos[$algorithm], $username.':'.$domain.':'.$password);
    }

    public static function generatePin()
    {
        return mt_rand(1000, 9999);
    }

    public static function markdownDocumentationView($view)
    {
        $environment = Environment::createCommonMarkEnvironment();
        $environment->addExtension(new HeadingPermalinkExtension);
        $environment->addExtension(new TableOfContentsExtension);
        $environment->mergeConfig([
            'heading_permalink' => [
                'html_class' => 'permalink',
                'insert' => 'after',
                'title' => 'Permalink',
                'id_prefix' => '',
                'fragment_prefix' => '',
            ],
            'table_of_contents' => [
                'html_class' => 'table-of-contents float-right',
            ],
        ]);

        $converter = new MarkdownConverter($environment);

        return (string) $converter->convertToHtml(
            view($view, [
                'app_name' => config('app.name')
            ])->render()
        );
    }
}