<?php

declare(strict_types=1);

/**
 * Hoa
 *
 *
 * @license
 *
 * New BSD License
 *
 * Copyright © 2007-2017, Hoa community. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * 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.
 *     * Neither the name of the Hoa nor the names of its contributors may be
 *       used to endorse or promote products derived from this software without
 *       specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDERS AND CONTRIBUTORS 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 Kitab\Compiler\Target\Html\Markdown;

use Hoa\Router;
use Kitab\Compiler\Target;
use League\CommonMark\Environment;
use League\CommonMark\DocParser;
use League\CommonMark\HtmlRenderer;
use League\CommonMark\Inline\Element\Code;

class Markdown
{
    protected $_router            = null;
    private static $_htmlParser   = null;
    private static $_htmlRenderer = null;

    public function __construct(Router $router)
    {
        $this->_router = $router;

        return;
    }

    public function toHtml(string $markdown): string
    {
        if (null === self::$_htmlRenderer) {
            $environment = Environment::createCommonMarkEnvironment();
            $environment->addInlineRenderer(
                Code::class,
                new Renderer\Code($this->_router)
            );
            self::$_htmlParser   = new DocParser($environment);
            self::$_htmlRenderer = new HtmlRenderer($environment);
        }

        return self::$_htmlRenderer->renderBlock(
            self::$_htmlParser->parse($markdown)
        );
    }
}