<?php
declare(strict_types=1);

namespace Esun\Catalog\Plugin\WeltPixel;

use Magento\Catalog\Model\Layer\Filter\FilterInterface;
use WeltPixel\LayeredNavigation\Block\Navigation\FilterRenderer;

class PriceStepCountsPlugin
{
    public function beforeRender(FilterRenderer $subject, FilterInterface $filter): array
    {
        if ($filter->getRequestVar() !== 'price') {
            return [$filter];
        }

        $collection = $filter->getLayer()->getProductCollection();

        if (!method_exists($collection, 'getFacetedData')) {
            $subject->setData('esun_price_step_ranges', []);
            return [$filter];
        }

        $ranges = [];
        foreach ($collection->getFacetedData('price') as $bucket) {
            $count = (int)($bucket['count'] ?? 0);
            if ($count <= 0) {
                continue;
            }

            $value = (string)($bucket['value'] ?? '');
            $from = $bucket['from'] ?? null;
            $to = $bucket['to'] ?? null;

            if (($from === null || $to === null) && str_contains($value, '_')) {
                [$fromValue, $toValue] = explode('_', $value, 2);
                $from = $fromValue === '*' ? null : (float)$fromValue;
                $to = $toValue === '*' ? null : (float)$toValue;
            }

            if ($from === null && $to === null) {
                continue;
            }

            $ranges[] = [
                'from' => $from === null ? '' : (float)$from,
                'to' => $to === null ? '' : (float)$to,
                'count' => $count,
                'value' => $value,
            ];
        }

        usort($ranges, static function (array $left, array $right): int {
            return (float)$left['from'] <=> (float)$right['from'];
        });

        $subject->setData('esun_price_step_ranges', $ranges);

        return [$filter];
    }
}