<?php

declare(strict_types=1);

namespace Evomedien\Vitec\Preview;

use Doctrine\DBAL\ParameterType;
use TYPO3\CMS\Backend\Preview\StandardContentPreviewRenderer;
use TYPO3\CMS\Backend\View\BackendLayout\Grid\GridColumnItem;
use TYPO3\CMS\Core\Database\ConnectionPool;
use TYPO3\CMS\Core\Resource\ResourceFactory;
use TYPO3\CMS\Core\Service\FlexFormService;
use TYPO3\CMS\Core\Utility\GeneralUtility;
use TYPO3\CMS\Fluid\View\StandaloneView;

/**
 * Page-module preview for the VITEC Card plugin (vitec_modelcard):
 * type badge, selected record title, thumbnail and layout badge.
 * Registered via TCA types.vitec_modelcard.previewRenderer.
 */
class ModelcardPreviewRenderer extends StandardContentPreviewRenderer
{
    private const MODEL_TABLES = [
        'product' => 'tx_vitec_domain_model_product',
        'story' => 'tx_vitec_domain_model_usecase',
        'market' => 'tx_vitec_domain_model_market',
        'solution' => 'tx_vitec_domain_model_solution',
    ];

    private const TYPE_LABELS = [
        'product' => 'Product',
        'story' => 'Success Story',
        'market' => 'Market',
        'solution' => 'Solution',
    ];

    /** Card-image FAL field per model type (first hit wins). */
    private const IMAGE_FIELDS = [
        'product' => ['image', 'productimage'],
        'story' => ['card_image', 'hero_bgimage'],
        'market' => ['image'],
        'solution' => ['image'],
    ];

    public function renderPageModulePreviewContent(GridColumnItem $item): string
    {
        try {
            $record = $item->getRecord();

            $flexFormService = GeneralUtility::makeInstance(FlexFormService::class);
            $flexFormData = $flexFormService->convertFlexFormContentToArray($record['pi_flexform'] ?? '');
            $settings = $flexFormData['settings'] ?? [];

            $modelType = (string)($settings['modelType'] ?? 'product');
            $layout = (string)($settings['layout'] ?? 'vertical');
            $recordUid = (int)($settings[$modelType === 'story' ? 'story' : $modelType] ?? 0);

            $title = '';
            $subtitle = '';
            $imageUrl = '';
            if ($recordUid > 0 && isset(self::MODEL_TABLES[$modelType])) {
                $table = self::MODEL_TABLES[$modelType];
                $qb = GeneralUtility::makeInstance(ConnectionPool::class)->getQueryBuilderForTable($table);
                $row = $qb
                    ->select('*')
                    ->from($table)
                    ->where(
                        $qb->expr()->eq('uid', $qb->createNamedParameter($recordUid, ParameterType::INTEGER)),
                        $qb->expr()->eq('deleted', 0)
                    )
                    ->executeQuery()
                    ->fetchAssociative();
                if ($row) {
                    $title = (string)($row['title'] ?? '');
                    $subtitle = (string)($row['subtitle'] ?? ($row['teaser'] ?? ''));
                    $imageUrl = $this->firstImageUrl($table, $recordUid, self::IMAGE_FIELDS[$modelType]);
                }
            }

            $view = GeneralUtility::makeInstance(StandaloneView::class);
            $view->setTemplatePathAndFilename('EXT:vitec/Resources/Private/Templates/Preview/Modelcard.html');
            $view->assignMultiple([
                'typeLabel' => self::TYPE_LABELS[$modelType] ?? $modelType,
                'layout' => $layout,
                'recordUid' => $recordUid,
                'title' => $title,
                'subtitle' => $subtitle,
                'imageUrl' => $imageUrl,
            ]);

            return $view->render();
        } catch (\Throwable $e) {
            return parent::renderPageModulePreviewContent($item);
        }
    }

    /** @param string[] $fieldNames */
    private function firstImageUrl(string $table, int $uid, array $fieldNames): string
    {
        try {
            $qb = GeneralUtility::makeInstance(ConnectionPool::class)->getQueryBuilderForTable('sys_file_reference');
            foreach ($fieldNames as $fieldName) {
                $ref = $qb
                    ->select('uid')
                    ->from('sys_file_reference')
                    ->where(
                        $qb->expr()->eq('tablenames', $qb->createNamedParameter($table, ParameterType::STRING)),
                        $qb->expr()->eq('fieldname', $qb->createNamedParameter($fieldName, ParameterType::STRING)),
                        $qb->expr()->eq('uid_foreign', $qb->createNamedParameter($uid, ParameterType::INTEGER)),
                        $qb->expr()->eq('deleted', 0),
                        $qb->expr()->eq('hidden', 0)
                    )
                    ->setMaxResults(1)
                    ->executeQuery()
                    ->fetchAssociative();
                if ($ref) {
                    $file = GeneralUtility::makeInstance(ResourceFactory::class)
                        ->getFileReferenceObject((int)$ref['uid']);
                    return (string)$file->getPublicUrl();
                }
            }
        } catch (\Throwable $e) {
            // no thumb
        }
        return '';
    }
}