<?php

namespace EP\EpTheme\ViewHelpers\Uri;

use Psr\Http\Message\ServerRequestInterface;
use TYPO3\CMS\Core\Utility\RootlineUtility;
use TYPO3\CMS\Fluid\ViewHelpers\Uri\ActionViewHelper;
use TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper;

/**
 * f:uri.action for the AJAX plugin: picks the page type from the format and links to the
 * root page unless a page is given. The core ViewHelper is final, so it is invoked instead
 * of extended.
 */
class AjaxViewHelper extends AbstractViewHelper
{

    const PAGE_TYPE_JSON = 1701;
    const PAGE_TYPE_HTML = 1702;

    public function initializeArguments(): void
    {
        $this->registerArgument('action', 'string', 'Target action');
        $this->registerArgument('arguments', 'array', 'Arguments for the controller action', false, []);
        $this->registerArgument('controller', 'string', 'Target controller');
        $this->registerArgument('extensionName', 'string', 'Target extension name', false, 'epproducts');
        $this->registerArgument('pluginName', 'string', 'Target plugin name', false, 'Ajax');
        $this->registerArgument('pageUid', 'int', 'Target page, defaults to the root page');
        $this->registerArgument('format', 'string', 'The requested format, json or html', false, 'json');
    }

    public function render(): string
    {
        $arguments = $this->arguments;

        // Determine page type from format argument
        if (strtolower(trim($arguments['format'])) === 'json') {
            $arguments['pageType'] = self::PAGE_TYPE_JSON;
        } else {
            $arguments['pageType'] = self::PAGE_TYPE_HTML;
        }

        // Reset argument to keep it out of resulting url
        unset($arguments['format']);

        // Use root page uid as target unless provided
        if ($arguments['pageUid'] === null) {
            /** @var ServerRequestInterface $request */
            $request = $this->renderingContext->getAttribute(ServerRequestInterface::class);
            $rootlineUtility = new RootlineUtility($request->getAttribute('frontend.page.information')->getId());
            $rootline = $rootlineUtility->get();
            $rootPage = array_pop($rootline);
            $arguments['pageUid'] = $rootPage['uid'];
        }

        // Force absolute urls
        $arguments['absolute'] = true;

        return (string)$this->renderingContext->getViewHelperInvoker()->invoke(
            ActionViewHelper::class,
            $arguments,
            $this->renderingContext,
            $this->buildRenderChildrenClosure()
        );
    }

}