<?php

namespace EP\EpTheme\DataProcessing;

use EP\EpProducts\Traits\DbConnectionTrait;
use TYPO3\CMS\Core\Resource\FileRepository;
use TYPO3\CMS\Core\Utility\GeneralUtility;
use TYPO3\CMS\Core\Utility\RootlineUtility;
use TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer;
use TYPO3\CMS\Frontend\ContentObject\DataProcessorInterface;

class SliderProcessor implements DataProcessorInterface
{
    use DbConnectionTrait;

    /**
     * @return array
     * @throws \Doctrine\DBAL\DBALException
     */
    public function process(
        ContentObjectRenderer $cObj,
        array $contentObjectConfiguration,
        array $processorConfiguration,
        array $processedData
    ) {
        $page = $cObj->data;
        $pageUid = $page['uid'];

        if ((int) $page['tx_eptheme_slides'] === 0) {
            $pageUid = $this->getParentPageWithSlides();
        }

        if ($pageUid === null) {
            return $processedData;
        }

        $qb = $this->getDbConnection()->createQueryBuilder();

        $query = $qb
            ->select('uid', 'headline', 'subline', 'button', 'page_uid', 'skipass')
            ->from('tx_eptheme_domain_model_slide')
            ->where('page = :pageUid')
            ->andWhere('deleted = 0')
            ->andWhere('hidden = 0')
            ->orderBy('sorting')
            ->setParameter('pageUid', $pageUid)
        ;

        $slides = $query->executeQuery()->fetchAllAssociative();

        if ($slides) {
            $fileRepository = GeneralUtility::makeInstance(FileRepository::class);
            foreach ($slides as $slide) {
                $processedData['slides'][$slide['uid']] = $slide;
                $processedData['slides'][$slide['uid']]['image'] = $fileRepository->findByRelation(
                    'tx_eptheme_domain_model_slide',
                    'images',
                    $slide['uid']
                );
            }
        }

        if (1 === count($slides)) {
            $processedData['slide'] = reset($processedData['slides']);
        }

        return $processedData;
    }

    private function getParentPageWithSlides(): ?int
    {
        $rootlineUtility = new RootlineUtility($GLOBALS['TYPO3_REQUEST']->getAttribute('frontend.page.information')->getId());
        $rootline = $rootlineUtility->get();

        foreach ($rootline as $parentPage) {
            if ((int) $parentPage['tx_eptheme_slides'] > 0) {
                return (int) $parentPage['uid'];
            }
        }

        return null;
    }

}