<?php

declare(strict_types=1);

namespace Evomedien\Vitec\ContextMenu;

use TYPO3\CMS\Backend\ContextMenu\ItemProviders\AbstractProvider;
use TYPO3\CMS\Backend\Utility\BackendUtility;
use TYPO3\CMS\Core\Core\Environment;

/**
 * Page tree context menu: "Purge from SSR cache" - evicts exactly this
 * page from the SSR node's full-page cache, with toast feedback.
 * Shown only for real pages and only while the purge endpoint is
 * configured (var/vitec-ssr-purge.env).
 */
final class SsrPurgeItemProvider extends AbstractProvider
{
    protected $itemsConfiguration = [
        'ssrPurge' => [
            'type' => 'item',
            'label' => 'Purge from SSR cache',
            'iconIdentifier' => 'actions-system-cache-clear-impact-medium',
            'callbackAction' => 'ssrPurge',
        ],
    ];

    public function canHandle(): bool
    {
        return $this->table === 'pages';
    }

    /**
     * Below the core PageProvider (100): we run after it and splice our
     * item into the finished menu, right behind "Clear cache".
     */
    public function getPriority(): int
    {
        return 42;
    }

    public function addItems(array $items): array
    {
        if (!is_readable(Environment::getVarPath() . '/vitec-ssr-purge.env')) {
            return $items;
        }
        $page = BackendUtility::getRecord('pages', (int)$this->identifier, 'uid,doktype');
        if ($page === null || (int)$page['doktype'] >= 199) {
            // Spacers, folders, recycler - nothing cached for those.
            return $items;
        }
        $this->initDisabledItems();
        $localItems = $this->prepareItems($this->itemsConfiguration);
        if (isset($items['clearCache'])) {
            $new = [];
            foreach ($items as $key => $item) {
                $new[$key] = $item;
                if ($key === 'clearCache') {
                    $new = array_merge($new, $localItems);
                }
            }
            return $new;
        }
        return array_merge($items, $localItems);
    }

    protected function getAdditionalAttributes(string $itemName): array
    {
        return ['data-callback-module' => '@evomedien/vitec/ssr-context-menu.js'];
    }
}