<?php

namespace Codappix\ExternalTypo3Multimedia;

/*
 * Copyright (C) 2020 Daniel Siepmann <coding@daniel-siepmann.de>
 *
 * This program 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 2
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

use TYPO3\CMS\Core\Resource\File;
use TYPO3\CMS\Core\Resource\FileInterface;
use TYPO3\CMS\Core\Resource\FileReference;
use TYPO3\CMS\Core\Resource\OnlineMedia\Helpers\OnlineMediaHelperInterface;
use TYPO3\CMS\Core\Resource\OnlineMedia\Helpers\OnlineMediaHelperRegistry;

/**
 * Provides common API to generate iFrames for external multimedia.
 */
class IFrameRenderer
{
    /**
     * Generates pairs of key/value; not yet html-escaped
     */
    public function collectAttributes(
        string $width,
        string $height,
        array $options
    ): array {
        $attributes = [];
        $attributes['allowfullscreen'] = true;

        if (isset($options['additionalAttributes']) && is_array($options['additionalAttributes'])) {
            $attributes = array_merge($attributes, $options['additionalAttributes']);
        }
        if (isset($options['data']) && is_array($options['data'])) {
            array_walk(
                $options['data'],
                function (&$value, $key) use (&$attributes) {
                    $attributes['data-' . $key] = $value;
                }
            );
        }
        if ($width !== '' && $width !== 0) {
            $attributes['width'] = htmlspecialchars($width);
        }
        if ($height !== '' && $height !== 0) {
            $attributes['height'] = htmlspecialchars($height);
        }
        if (
            isset($GLOBALS['TSFE'])
            && is_object($GLOBALS['TSFE'])
            && (
                isset($GLOBALS['TSFE']->config['config']['doctype'])
                && $GLOBALS['TSFE']->config['config']['doctype'] !== 'html5'
            )
        ) {
            $attributes['frameborder'] = 0;
        }
        $allowedAttributes = [
            'class',
            'dir',
            'id',
            'lang',
            'style',
            'title',
            'accesskey',
            'tabindex',
            'onclick',
            'allow',
        ];
        foreach ($allowedAttributes as $key) {
            if (!empty($options[$key])) {
                $attributes[$key] = $options[$key];
            }
        }

        $attributes = array_map('htmlspecialchars', $attributes);

        return $attributes;
    }

    public function collectOptions(
        array $options,
        FileInterface $file
    ): array {
        // Check for an autoplay option at the file reference itself, if not overridden yet.
        if (!isset($options['autoplay']) && $file instanceof FileReference) {
            $autoplay = $file->getProperty('autoplay');
            if ($autoplay !== null) {
                $options['autoplay'] = $autoplay;
            }
        }

        if (!isset($options['allow'])) {
            $options['allow'] = 'fullscreen';
            if (!empty($options['autoplay'])) {
                $options['allow'] = 'autoplay; fullscreen';
            }
        }

        return $options;
    }

    public function getOriginalFile(FileInterface $file): File
    {
        $orgFile = $file;

        if ($orgFile instanceof FileReference) {
            $orgFile = $orgFile->getOriginalFile();
        }

        return $orgFile;
    }

    public function getOnlineMediaHelper(FileInterface $file): OnlineMediaHelperInterface
    {
        return OnlineMediaHelperRegistry::getInstance()
            ->getOnlineMediaHelper($this->getOriginalFile($file));
    }
}