<?php

namespace TFGraphics\SmartImport\Intelligence;

use TFGraphics\SmartImport\Domain\Contracts\AttributeResolverInterface;
use TFGraphics\SmartImport\Domain\DTO\AttributeDTO;
use TFGraphics\SmartImport\Domain\DTO\ProductDTO;

final class AttributeResolver implements AttributeResolverInterface
{
    public function resolve(ProductDTO $productDTO): array
    {
        $resolved = [];

        foreach ($productDTO->getAttributes() as $attribute) {
            if (! $attribute instanceof AttributeDTO) {
                continue;
            }

            $resolved[] = new AttributeDTO(
                $attribute->getName(),
                trim($attribute->getValue()),
                $attribute->getTaxonomy()
            );
        }

        if (
            $productDTO->getBarcode() !== null
            && $this->isIsbn($productDTO->getBarcode()->getValue())
            && ! $this->hasAttribute($resolved, 'isbn')
        ) {
            $resolved[] = new AttributeDTO('isbn', $productDTO->getBarcode()->getValue());
        }

        return $resolved;
    }

    private function hasAttribute(array $attributes, string $name): bool
    {
        foreach ($attributes as $attribute) {
            if ($attribute instanceof AttributeDTO && $attribute->getName() === $name) {
                return true;
            }
        }

        return false;
    }

    private function isIsbn(string $value): bool
    {
        $normalized = strtoupper((string) preg_replace('/[^0-9X]/i', '', $value));

        return preg_match('/^[0-9]{9}[0-9X]$/', $normalized) === 1
            || preg_match('/^97[89][0-9]{10}$/', $normalized) === 1;
    }
}