<?php
declare(strict_types=1);

namespace Esun\PromotionPopup\Model\Config\Source;

use Magento\Cms\Model\ResourceModel\Block\CollectionFactory;
use Magento\Framework\Data\OptionSourceInterface;

class CmsBlock implements OptionSourceInterface
{
    public function __construct(private readonly CollectionFactory $collectionFactory)
    {
    }

    public function toOptionArray(): array
    {
        $collection = $this->collectionFactory->create();
        $collection->addFieldToSelect(['title', 'identifier']);
        $collection->addFieldToFilter('is_active', 1);
        $collection->setOrder('title', 'ASC');

        $options = [['value' => '', 'label' => __('-- Please Select --')]];
        $identifiers = [];
        foreach ($collection as $block) {
            $identifier = trim((string)$block->getIdentifier());
            if ($identifier === '' || isset($identifiers[$identifier])) {
                continue;
            }

            $identifiers[$identifier] = true;
            $options[] = [
                'value' => $identifier,
                'label' => sprintf('%s [%s]', (string)$block->getTitle(), $identifier),
            ];
        }

        return $options;
    }
}