<?php

declare(strict_types=1);

namespace Evomedien\Vitec\UserFunc;

use Doctrine\DBAL\ParameterType;
use Evomedien\Vitec\Service\UsecaseSerializer;
use TYPO3\CMS\Core\Attribute\AsAllowedCallable;
use TYPO3\CMS\Core\Database\ConnectionPool;
use TYPO3\CMS\Core\Service\FlexFormService;
use TYPO3\CMS\Core\Utility\GeneralUtility;

/**
 * UserFunc: render the VITEC Card plugin as JSON (headless).
 *
 * ONE plugin for four card types — the FlexForm picks the model type
 * (product | story | market | solution) plus one record; ALL card data
 * comes from the model. Output under content.card:
 *
 *   { "modelType": "product", "layout": "vertical", "item": { … } }
 *
 * Image resolution is delegated to UsecaseSerializer::image() (generic,
 * srcset + SVG-safe). `render()` = top-level plugin / page discovery,
 * `renderForRecord()` = one tt_content row (container-nestable).
 * Exception-safe.
 */
class ModelcardJsonRenderer
{
    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',
    ];

    #[AsAllowedCallable]
    public function render(string $content, array $conf): string
    {
        $row = is_array($this->cObj->data ?? null) ? $this->cObj->data : null;
        if ($row && (string)($row['CType'] ?? '') === 'vitec_modelcard') {
            return $this->renderForRecord($row);
        }

        $pageId = 0;
        $request = $GLOBALS['TYPO3_REQUEST'] ?? null;
        if ($request !== null) {
            $pageInfo = $request->getAttribute('frontend.page.information');
            if ($pageInfo !== null) {
                $pageId = (int)$pageInfo->getId();
            }
        }
        if ($pageId <= 0) {
            $pageId = (int)($GLOBALS['TSFE']->id ?? 0);
        }
        if ($pageId <= 0) {
            return '';
        }

        $qb = GeneralUtility::makeInstance(ConnectionPool::class)->getQueryBuilderForTable('tt_content');
        $ces = $qb
            ->select('*')
            ->from('tt_content')
            ->where(
                $qb->expr()->eq('pid', $qb->createNamedParameter($pageId, ParameterType::INTEGER)),
                $qb->expr()->eq('CType', $qb->createNamedParameter('vitec_modelcard', ParameterType::STRING)),
                $qb->expr()->eq('deleted', 0),
                $qb->expr()->eq('hidden', 0)
            )
            ->executeQuery()
            ->fetchAllAssociative();

        if (empty($ces)) {
            return '';
        }

        return $this->renderForRecord($ces[0]);
    }

    /**
     * @param array<string,mixed> $contentElement
     */
    public function renderForRecord(array $contentElement): string
    {
        try {
            $flexFormService = GeneralUtility::makeInstance(FlexFormService::class);
            $flexFormData = $flexFormService->convertFlexFormContentToArray($contentElement['pi_flexform'] ?? '');
            $settings = $flexFormData['settings'] ?? [];

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

            $item = null;
            if ($recordUid > 0 && isset(self::MODEL_TABLES[$modelType])) {
                $row = $this->fetchRecord(self::MODEL_TABLES[$modelType], $recordUid);
                if ($row !== null) {
                    $item = $this->serializeItem($modelType, $row);
                }
            }

            $response = [
                'modelType' => $modelType,
                'layout' => $layout,
                'item' => $item,
            ];

            if ($debugMode) {
                $response['debug'] = ['recordUid' => $recordUid, 'settings' => $settings];
            }

            return (string)json_encode($response);
        } catch (\Throwable $e) {
            return '';
        }
    }

    /**
     * @return array<string,mixed>|null
     */
    private function fetchRecord(string $table, int $uid): ?array
    {
        $qb = GeneralUtility::makeInstance(ConnectionPool::class)->getQueryBuilderForTable($table);
        $row = $qb
            ->select('*')
            ->from($table)
            ->where(
                $qb->expr()->eq('uid', $qb->createNamedParameter($uid, ParameterType::INTEGER)),
                $qb->expr()->eq('deleted', 0),
                $qb->expr()->eq('hidden', 0)
            )
            ->executeQuery()
            ->fetchAssociative();

        return $row ?: null;
    }

    /**
     * @param array<string,mixed> $row
     * @return array<string,mixed>
     */
    private function serializeItem(string $modelType, array $row): array
    {
        $serializer = GeneralUtility::makeInstance(UsecaseSerializer::class);
        $uid = (int)$row['uid'];

        if ($modelType === 'story') {
            // Success stories already have the canonical card serialisation.
            return $serializer->serializeListItem($row);
        }

        if ($modelType === 'product') {
            return [
                'uid' => $uid,
                'title' => (string)($row['title'] ?? ''),
                'slug' => (string)($row['slug'] ?? ''),
                'subtitle' => (string)($row['subtitle'] ?? ''),
                'teaser' => (string)($row['teaser'] ?? ''),
                'image' => $serializer->image($uid, 'image', 'tx_vitec_domain_model_product')
                    ?? $serializer->image($uid, 'productimage', 'tx_vitec_domain_model_product'),
            ];
        }

        // market | solution — identical field set.
        return [
            'uid' => $uid,
            'title' => (string)($row['title'] ?? ''),
            'subtitle' => (string)($row['subtitle'] ?? ''),
            'teaser' => (string)($row['teaser'] ?? ''),
            'description' => (string)($row['description'] ?? ''),
            'image' => $serializer->image($uid, 'image', self::MODEL_TABLES[$modelType]),
        ];
    }
}