<?php

declare(strict_types=1);

/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */

namespace TYPO3\CMS\Backend\Form\FormDataProvider;

use TYPO3\CMS\Backend\Configuration\SiteTcaConfiguration;
use TYPO3\CMS\Backend\Form\FormDataProviderInterface;
use TYPO3\CMS\Core\Configuration\Processor\Placeholder\EnvPlaceholderProcessor;
use TYPO3\CMS\Core\Configuration\SiteConfiguration;
use TYPO3\CMS\Core\Exception\SiteNotFoundException;
use TYPO3\CMS\Core\Site\SiteFinder;
use TYPO3\CMS\Core\Utility\GeneralUtility;

/**
 * Special data provider for the sites configuration module.
 *
 * Fetch "row" data from yml file and set as 'databaseRow'
 */
readonly class SiteDatabaseEditRow implements FormDataProviderInterface
{
    public function __construct(
        private SiteFinder $siteFinder,
        private SiteTcaConfiguration $siteTcaConfiguration,
        private EnvPlaceholderProcessor $envPlaceholderProcessor,
    ) {}

    /**
     * First level of ['customData']['siteData'] to ['databaseRow']
     *
     * @throws \RuntimeException
     */
    public function addData(array $result): array
    {
        if ($result['command'] !== 'edit' || !empty($result['databaseRow'])) {
            return $result;
        }

        $tableName = $result['tableName'];
        if ($tableName === 'site') {
            $rootPageId = (int)$result['vanillaUid'];
            $rowData = $this->getRawConfigurationForSiteWithRootPageId($rootPageId);
            $result['databaseRow']['uid'] = $rowData['rootPageId'];
            $result['databaseRow']['identifier'] = $result['customData']['siteIdentifier'];
        } elseif (in_array($tableName, ['site_errorhandling', 'site_language', 'site_route', 'site_base_variant'], true)) {
            $unprocessedRootPageId = $result['inlineTopMostParentUid'] ?? $result['inlineParentUid'];

            $processedRootPageId = $this->envPlaceholderProcessor->canProcess($unprocessedRootPageId)
                ? (int)$this->envPlaceholderProcessor->process($unprocessedRootPageId)
                : (int)$unprocessedRootPageId;

            try {
                $rowData = $this->getRawConfigurationForSiteWithRootPageId($processedRootPageId);
                $parentFieldName = $result['inlineParentFieldName'];
                if (!isset($rowData[$parentFieldName])) {
                    throw new \RuntimeException('Field "' . $parentFieldName . '" not found', 1520886092);
                }
                $rowData = $rowData[$parentFieldName][$result['vanillaUid']];
                $result['databaseRow']['uid'] = $result['vanillaUid'];
            } catch (SiteNotFoundException $e) {
                $rowData = [];
            }
        } else {
            throw new \RuntimeException('Other tables not implemented', 1520886234);
        }

        foreach ($rowData as $fieldName => $value) {
            // Flat values only - databaseRow has no "tree"
            if (!is_array($value)) {
                $result['databaseRow'][$fieldName] = $value;
            }
        }
        // All "records" are always on pid 0
        $result['databaseRow']['pid'] = 0;
        return $result;
    }

    protected function getRawConfigurationForSiteWithRootPageId(int $rootPageId): array
    {
        $site = $this->siteFinder->getSiteByRootPageId($rootPageId);
        // load config as it is stored on disk (without replacements)
        $siteTca = $this->siteTcaConfiguration->getTca();

        $configuration = GeneralUtility::makeInstance(SiteConfiguration::class)->load($site->getIdentifier());

        foreach ($configuration as $fieldName => $fieldValue) {
            if (is_array($fieldValue) && ($siteTca['site']['columns'][$fieldName]['config']['type'] ?? '') === 'select' && ($siteTca['site']['columns'][$fieldName]['config']['renderType'] ?? '') === 'selectMultipleSideBySide') {
                $configuration[$fieldName] = implode(',', $fieldValue);
            }
        }
        return $configuration;
    }
}