<?php
namespace FluidTYPO3\Vhs\ViewHelpers\Resource;

/*
 * This file is part of the FluidTYPO3/Vhs project under GPLv2 or later.
 *
 * For the full copyright and license information, please read the
 * LICENSE.md file that was distributed with this source code.
 */

use FluidTYPO3\Vhs\Traits\TemplateVariableViewHelperTrait;

/**
 * ViewHelper to output or assign a image from FAL.
 */
class ImageViewHelper extends AbstractImageViewHelper
{
    use TemplateVariableViewHelperTrait;

    /**
     * name of the tag to be created by this view helper
     *
     * @var string
     * @api
     */
    protected $tagName = 'img';

    public function initializeArguments(): void
    {
        parent::initializeArguments();
        $this->registerUniversalTagAttributes();
        $this->registerTagAttribute(
            'usemap',
            'string',
            'A hash-name reference to a map element with which to associate the image.'
        );
        $this->registerTagAttribute(
            'ismap',
            'string',
            'Specifies that its img element provides access to a server-side image map.'
        );
        $this->registerTagAttribute(
            'alt',
            'string',
            'Equivalent content for those who cannot process images or who have image loading disabled.'
        );
        $this->registerArgument(
            'as',
            'string',
            'If specified, a template variable with this name containing the requested data will be inserted ' .
            'instead of returning it.'
        );
    }

    /**
     * Render method
     *
     * @return mixed
     */
    public function render()
    {
        $files = (array) $this->getFiles();

        $images = $this->preprocessImages($files, true);
        if (empty($images)) {
            return null;
        }

        $info = [];
        $tags = [];

        foreach ($images as &$image) {
            $source = $this->preprocessSourceUri($image['source']);
            $width = $image['info'][0];
            $height = $image['info'][1];
            $alt = $this->arguments['alt'];
            if (empty($alt)) {
                $alt = $image['file']['alternative'];
            }

            $this->tag->addAttribute('src', $source);
            $this->tag->addAttribute('width', $width);
            $this->tag->addAttribute('height', $height);
            $this->tag->addAttribute('alt', $alt);

            $tag = $this->tag->render();
            $image['tag'] = $tag;
            $tags[] = $tag;

            $info[] = [
                'source' => $source,
                'width' => $width,
                'height' => $height,
                'tag' => $tag
            ];
        }
        $as = $this->arguments['as'];
        if (empty($as)) {
            return implode('', $tags);
        }
        return $this->renderChildrenWithVariableOrReturnInput($info);
    }
}