<?php
declare(strict_types=1);

namespace TFGraphics\SmartImport\Search\Data;

use TFGraphics\SmartImport\Domain\DTO\{ProductDTO, AttributeDTO};

/** Reject recognisable site assets, not every OpenGraph/product image. */
final class ProviderImagePolicy
{
    public static function isSiteAsset(string $url): bool
    {
        // phpcs:ignore WordPress.WP.AlternativeFunctions.parse_url_parse_url -- Standalone-test fallback is used only when WordPress is unavailable.
        $path = rawurldecode((string) (function_exists('wp_parse_url') ? wp_parse_url($url, PHP_URL_PATH) : \parse_url($url, PHP_URL_PATH)));
        return preg_match('~/(?:themes|templates)/.*(?:opengraph|og[-_]image|logo|banner|placeholder)[^/]*\.(?:jpe?g|png|webp|gif|svg)$~i', $path) === 1;
    }

    public static function clean(ProductDTO $product): ProductDTO
    {
        // Respect choices already made by the merchant. Filtering belongs to
        // provider acquisition, before the preview offers selectable images.
        foreach ($product->getAttributes() as $a) {
            if (in_array($a->getName(), ['selected_image_urls', 'image_selection_confirmed', 'featured_image'], true)) { return $product; }
        }
        $images = array_values(array_filter($product->getImages(), static fn ($i): bool => ! self::isSiteAsset($i->getUrl())));
        $changed = count($images) !== count($product->getImages());
        $attributes = [];
        foreach ($product->getAttributes() as $a) {
            $value = $a->getValue();
            if (in_array($a->getName(), ['cover_url', 'gallery_urls', 'available_image_urls'], true)) {
                $urls = preg_split('/[\r\n]+|,\s*(?=https?:\/\/)|\s+(?=https?:\/\/)/i', $value) ?: [];
                $value = implode(', ', array_values(array_filter(array_map('trim', $urls), static fn ($u): bool => $u !== '' && ! self::isSiteAsset($u))));
                $changed = $changed || $value !== $a->getValue();
            }
            $attributes[] = new AttributeDTO($a->getName(), $value, $a->getTaxonomy());
        }
        if (! $changed) { return $product; }
        return new ProductDTO($product->getId(), $product->getName(), $product->getDescription(), $product->getShortDescription(),
            $product->getPrice(), $product->getInventory(), $product->getCategories(), $images, $attributes,
            $product->getSeo(), $product->getProviderInfo(), $product->getSku(), $product->getBarcode());
    }
}