<?php

declare(strict_types=1);

namespace Evomedien\Vitec\Preview;

use TYPO3\CMS\Backend\Preview\StandardContentPreviewRenderer;
use TYPO3\CMS\Backend\View\BackendLayout\Grid\GridColumnItem;
use TYPO3\CMS\Core\Database\Connection;
use TYPO3\CMS\Core\Database\ConnectionPool;
use TYPO3\CMS\Core\Service\FlexFormService;
use TYPO3\CMS\Core\Utility\GeneralUtility;

/**
 * Collapsible page-module previews for the three sub-market plugin sections
 * (Olli's wish 2026-10-02: every section collapsible, content visible):
 *
 *   vitec_usecaselist    -> selected story titles (+ "no quote" flag)
 *   vitec_productfeature -> the featured product's title
 *   vitec_productlist    -> hand-picked product titles / category info
 *
 * One class for all three - they only differ in how the FlexForm selection
 * is resolved to titles.
 */
class SubmarketPluginPreview extends StandardContentPreviewRenderer
{
    public function renderPageModulePreviewContent(GridColumnItem $item): string
    {
        $record = $this->recordArray($item);
        $flexFormData = GeneralUtility::makeInstance(FlexFormService::class)
            ->convertFlexFormContentToArray((string)($record['pi_flexform'] ?? ''));
        $settings = $flexFormData['settings'] ?? [];

        $label = '';
        $hint = '';
        $items = [];
        switch ((string)$record['CType']) {
            case 'vitec_usecaselist':
                $layout = (string)($settings['layout'] ?? 'grid');
                $label = $layout === 'testimonials' ? 'Testimonials' : 'Success Stories';
                $uids = GeneralUtility::intExplode(',', (string)($settings['usecases'] ?? ''), true);
                foreach ($this->rows('tx_vitec_domain_model_usecase', $uids, ['quote']) as $row) {
                    $items[] = $row['title'] . (trim((string)$row['quote']) === '' ? ' — ⚠ kein Zitat' : '');
                }
                $hint = $uids === [] ? 'alle Stories (' . $layout . ')' : count($items) . ' ausgewählt · ' . $layout;
                break;
            case 'vitec_productfeature':
                $label = 'Featured Product';
                $uid = (int)($settings['product'] ?? 0);
                foreach ($this->rows('tx_vitec_domain_model_product', $uid > 0 ? [$uid] : []) as $row) {
                    $items[] = $row['title'];
                }
                $hint = $items[0] ?? '⚠ kein Produkt gewählt';
                break;
            case 'vitec_productlist':
                $label = 'Products';
                $uids = GeneralUtility::intExplode(',', (string)($settings['selectedproducts'] ?? ''), true);
                if ($uids !== []) {
                    foreach ($this->rows('tx_vitec_domain_model_product', $uids) as $row) {
                        $items[] = $row['title'];
                    }
                    $hint = count($items) . ' handverlesen';
                } else {
                    $hint = !empty($settings['allproducts']) ? 'alle Produkte' : 'nach Kategorie';
                }
                break;
        }

        // v14: StandaloneView was removed - views come from the ViewFactory.
        $view = GeneralUtility::makeInstance(\TYPO3\CMS\Core\View\ViewFactoryInterface::class)
            ->create(new \TYPO3\CMS\Core\View\ViewFactoryData(
                templatePathAndFilename: 'EXT:vitec/Resources/Private/Templates/Preview/SubmarketSection.html',
                request: $GLOBALS['TYPO3_REQUEST'] ?? null,
            ));
        $view->assignMultiple([
            'label' => $label,
            'hint' => $hint,
            'items' => $items,
            'header' => (string)($record['header'] ?? ''),
        ]);
        return $view->render();
    }

    /**
     * Title rows for the given uids, in the given order.
     *
     * @param int[] $uids
     * @param string[] $extraFields
     * @return array<int,array<string,mixed>>
     */
    private function rows(string $table, array $uids, array $extraFields = []): array
    {
        if ($uids === []) {
            return [];
        }
        $queryBuilder = GeneralUtility::makeInstance(ConnectionPool::class)->getQueryBuilderForTable($table);
        $rows = $queryBuilder->select('uid', 'title', ...$extraFields)->from($table)
            ->where(
                $queryBuilder->expr()->in('uid', $queryBuilder->createNamedParameter($uids, Connection::PARAM_INT_ARRAY)),
                $queryBuilder->expr()->eq('deleted', 0)
            )
            ->executeQuery()->fetchAllAssociative();
        $byUid = array_column($rows, null, 'uid');
        $ordered = [];
        foreach ($uids as $uid) {
            if (isset($byUid[$uid])) {
                $ordered[] = $byUid[$uid];
            }
        }
        return $ordered;
    }

    /**
     * v14: GridColumnItem::getRecord() returns a Domain\Record object, no
     * longer an array (found 2026-10-02 - crashed the page module preview).
     * Normalizes both shapes to the raw database array.
     *
     * @return array<string,mixed>
     */
    private function recordArray(GridColumnItem $item): array
    {
        $record = $item->getRecord();
        if ($record instanceof \TYPO3\CMS\Core\Domain\Record) {
            $raw = $record->getRawRecord();
            return $raw !== null ? $raw->toArray() : [];
        }
        return (array)$record;
    }
}