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<?php
/**
 * Mageplaza
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Mageplaza.com license that is
 * available through the world-wide-web at this URL:
 * https://www.mageplaza.com/LICENSE.txt
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade this extension to newer
 * version in the future.
 *
 * @category    Mageplaza
 * @package     Mageplaza_LayeredNavigation
 * @copyright   Copyright (c) Mageplaza (https://www.mageplaza.com/)
 * @license     https://www.mageplaza.com/LICENSE.txt
 */

namespace Mageplaza\LayeredNavigation\Model\Layer\Filter;

use Magento\Catalog\Model\Layer as LayerCatalog;
use Magento\Catalog\Model\Layer\Filter\Item\DataBuilder;
use Magento\Catalog\Model\Layer\Filter\ItemFactory;
use Magento\CatalogSearch\Model\Layer\Filter\Attribute as AbstractFilter;
use Magento\Framework\App\RequestInterface;
use Magento\Framework\Filter\StripTags;
use Magento\Store\Model\StoreManagerInterface;
use Mageplaza\LayeredNavigation\Helper\Data as LayerHelper;
use Mageplaza\LayeredNavigation\Model\ResourceModel\Fulltext\Collection;

/**
 * Class Attribute
 * @package Mageplaza\LayeredNavigation\Model\Layer\Filter
 */
class Attribute extends AbstractFilter
{
    /** @var LayerHelper */
    protected $_moduleHelper;

    /** @var bool Is Filterable Flag */
    protected $_isFilter = true;

    /** @var StripTags */
    private $tagFilter;

    /**
     * Attribute constructor.
     *
     * @param ItemFactory $filterItemFactory
     * @param StoreManagerInterface $storeManager
     * @param LayerCatalog $layer
     * @param DataBuilder $itemDataBuilder
     * @param StripTags $tagFilter
     * @param LayerHelper $moduleHelper
     * @param array $data
     */
    public function __construct(
        ItemFactory $filterItemFactory,
        StoreManagerInterface $storeManager,
        LayerCatalog $layer,
        DataBuilder $itemDataBuilder,
        StripTags $tagFilter,
        LayerHelper $moduleHelper,
        array $data = []
    ) {
        $this->tagFilter = $tagFilter;
        $this->_moduleHelper = $moduleHelper;

        parent::__construct(
            $filterItemFactory,
            $storeManager,
            $layer,
            $itemDataBuilder,
            $tagFilter,
            $data
        );
    }

    /**
     * @inheritdoc
     */
    public function apply(RequestInterface $request)
    {
        if (!$this->_moduleHelper->isEnabled()) {
            return parent::apply($request);
        }

        $attributeValue = $request->getParam($this->_requestVar);
        $attribute = $this->getAttributeModel();

        if (!($attributeValue === '0' && $attribute->getFrontendInput() === 'boolean')) {
            if (empty($attributeValue)) {
                $this->_isFilter = false;
                return $this;
            }
        }

        $attributeValue = explode(',', $attributeValue);

        $attribute = $this->getAttributeModel();
        /** @var \Magento\CatalogSearch\Model\ResourceModel\Fulltext\Collection $productCollection */
        $productCollection = $this->getLayer()
            ->getProductCollection();
        if (count($attributeValue) > 1) {
            $productCollection->addFieldToFilter($attribute->getAttributeCode(), ['in' => $attributeValue]);
        } else {
            $productCollection->addFieldToFilter($attribute->getAttributeCode(), $attributeValue[0]);
        }

        $state = $this->getLayer()->getState();
        foreach ($attributeValue as $value) {
            $label = $this->getOptionText($value);
            $state->addFilter($this->_createItem($label, $value));
        }

        return $this;
    }

    /**
     * @inheritdoc
     */
    protected function _getItemsData()
    {
        if (!$this->_moduleHelper->isEnabled()) {
            return parent::_getItemsData();
        }

        $attribute = $this->getAttributeModel();

        /** @var Collection $productCollection */
        $productCollection = $this->getLayer()->getProductCollection();

        if ($this->_isFilter) {
            $productCollection = $productCollection->getCollectionClone()
                ->removeAttributeSearch($attribute->getAttributeCode());
        }

        $optionsFacetedData = $productCollection->getFacetedData($attribute->getAttributeCode());

        if (count($optionsFacetedData) === 0
            && $this->getAttributeIsFilterable($attribute) !== static::ATTRIBUTE_OPTIONS_ONLY_WITH_RESULTS
        ) {
            return $this->itemDataBuilder->build();
        }

        $productSize = $productCollection->getSize();
        $itemData = [];
        $checkCount = false;

        $options = $attribute->getFrontend()->getSelectOptions();
        foreach ($options as $option) {
            if (empty($option['value'])) {
                continue;
            }

            $value = $option['value'];

            $count = isset($optionsFacetedData[$value]['count'])
                ? (int)$optionsFacetedData[$value]['count']
                : 0;

            // Check filter type
            if ($this->getAttributeIsFilterable($attribute) === static::ATTRIBUTE_OPTIONS_ONLY_WITH_RESULTS
                && (!$this->_moduleHelper->getFilterModel()->isOptionReducesResults($this, $count, $productSize))
            ) {
                continue;
            }

            if ($count > 0) {
                $checkCount = true;
            }

            $itemData[] = [
                'label' => $this->tagFilter->filter($option['label']),
                'value' => $value,
                'count' => $count
            ];
        }

        if ($checkCount) {
            foreach ($itemData as $item) {
                $this->itemDataBuilder->addItemData($item['label'], $item['value'], $item['count']);
            }
        }

        return $this->itemDataBuilder->build();
    }
}