<?php

namespace Wga\WgaFaq\Hooks;

use Wga\WgaFaq\Utility\TemplateLayout;
use TYPO3\CMS\Backend\Utility\BackendUtility as BackendUtilityCore;
use TYPO3\CMS\Core\Database\ConnectionPool;
use TYPO3\CMS\Core\Information\Typo3Version;
use TYPO3\CMS\Core\Site\SiteFinder;
use TYPO3\CMS\Core\Utility\GeneralUtility;

/**
 * Userfunc to render alternative label for media elements
 */
class ItemsProcFunc
{

    /**
     * @var TemplateLayout $templateLayoutsUtility
     */
    protected $templateLayoutsUtility;

    /**
     * ItemsProcFunc constructor.
     * @param TemplateLayout $templateLayout
     */
    public function __construct(TemplateLayout $templateLayout)
    {
        $this->templateLayoutsUtility = $templateLayout;
    }

    // @codingStandardsIgnoreStart
    /**
     * Itemsproc function to extend the selection of templateLayouts in the plugin
     *
     * @param array &$config configuration array
     *
     * @return void
     */
    public function user_templateLayout(array &$config): void
    {
        // @codingStandardsIgnoreEnd

        $currentColPos = $config['flexParentDatabaseRow']['colPos'];
        $pageId = $this->getPageId($config['flexParentDatabaseRow']['pid']);

        if ($pageId > 0) {
            $templateLayouts = $this->templateLayoutsUtility->getAvailableTemplateLayouts($pageId);

            $templateLayouts = $this->reduceTemplateLayouts($templateLayouts, $currentColPos);
            foreach ($templateLayouts as $layout) {
                $additionalLayout = [
                    htmlspecialchars($this->getLanguageService()->sL($layout[0])),
                    $layout[1]
                ];
                array_push($config['items'], $additionalLayout);
            }
        }
    }

    /**
     * Reduce the template layouts by the ones that are not allowed in given colPos
     *
     * @param array $templateLayouts
     * @param int $currentColPos
     * @return array
     */
    protected function reduceTemplateLayouts($templateLayouts, $currentColPos): array
    {
        $currentColPos = (int)$currentColPos;
        $restrictions = [];
        $allLayouts = [];
        foreach ($templateLayouts as $key => $layout) {
            if (is_array($layout[0])) {
                if (isset($layout[0]['allowedColPos']) && str_ends_with((string)$layout[1], '.')) {
                    $layoutKey = substr($layout[1], 0, -1);
                    $restrictions[$layoutKey] = GeneralUtility::intExplode(',', $layout[0]['allowedColPos'], true);
                }
            } else {
                $allLayouts[$key] = $layout;
            }
        }
        if (!empty($restrictions)) {
            foreach ($restrictions as $restrictedIdentifier => $restrictedColPosList) {
                if (!in_array($currentColPos, $restrictedColPosList, true)) {
                    unset($allLayouts[$restrictedIdentifier]);
                }
            }
        }

        return $allLayouts;
    }

    /**
     * Get page id, if negative, then it is a "after record"
     *
     * @param int $pid
     * @return int
     */
    protected function getPageId($pid): int
    {
        $pid = (int)$pid;

        if ($pid > 0) {
            return $pid;
        }

        $row = BackendUtilityCore::getRecord('tt_content', abs($pid), 'uid,pid');
        return $row['pid'];
    }

    /**
     * Returns LanguageService
     *
     * @return \TYPO3\CMS\Core\Localization\LanguageService
     */
    protected function getLanguageService(): \TYPO3\CMS\Core\Localization\LanguageService
    {
        return $GLOBALS['LANG'];
    }
}