<?php

declare(strict_types=1);

namespace Esun\Translation\Model\Product;

use Esun\Translation\Model\Config;
use Magento\Catalog\Api\ProductAttributeRepositoryInterface;
use Magento\Catalog\Api\ProductRepositoryInterface;
use Magento\Catalog\Model\ResourceModel\Eav\Attribute;

class TranslatableFieldProvider
{
    public function __construct(
        private readonly Config $config,
        private readonly ProductRepositoryInterface $productRepository,
        private readonly ProductAttributeRepositoryInterface $attributeRepository
    ) {
    }

    /**
     * @param int[] $targetStoreIds
     * @return array<int, array<string, mixed>>
     */
    public function getFields(int $productId, array $targetStoreIds = []): array
    {
        $sourceProduct = $this->productRepository->getById($productId, false, $this->config->getSourceStoreId());
        $targetProduct = $targetStoreIds !== []
            ? $this->productRepository->getById($productId, false, (int)reset($targetStoreIds))
            : null;
        $fields = [];

        foreach ($this->getAttributes() as $attribute) {
            $code = (string)$attribute->getAttributeCode();
            $sourceValue = (string)($sourceProduct->getData($code) ?? '');
            $targetValue = $targetProduct ? (string)($targetProduct->getData($code) ?? '') : '';

            $fields[] = [
                'code' => $code,
                'label' => (string)$attribute->getDefaultFrontendLabel() ?: $code,
                'source_value' => $sourceValue,
                'target_value' => $targetValue,
                'is_html' => $this->isHtmlAttribute($attribute),
            ];
        }

        return $fields;
    }

    /**
     * @return Attribute[]
     */
    public function getAttributes(): array
    {
        $attributes = [];
        foreach ($this->config->getTranslatableAttributeCodes() as $code) {
            try {
                $attribute = $this->attributeRepository->get($code);
            } catch (\Throwable) {
                continue;
            }

            if (!$attribute instanceof Attribute) {
                continue;
            }

            if (!in_array((string)$attribute->getFrontendInput(), ['text', 'textarea'], true)) {
                continue;
            }

            if ($attribute->isScopeGlobal()) {
                continue;
            }

            $attributes[$code] = $attribute;
        }

        return array_values($attributes);
    }

    public function isAttributeAllowed(string $code): bool
    {
        foreach ($this->getAttributes() as $attribute) {
            if ((string)$attribute->getAttributeCode() === $code) {
                return true;
            }
        }

        return false;
    }

    public function isHtmlAttributeCode(string $code): bool
    {
        foreach ($this->getAttributes() as $attribute) {
            if ((string)$attribute->getAttributeCode() === $code) {
                return $this->isHtmlAttribute($attribute);
            }
        }

        return false;
    }

    private function isHtmlAttribute(Attribute $attribute): bool
    {
        return (bool)$attribute->getIsWysiwygEnabled()
            || in_array((string)$attribute->getAttributeCode(), ['description', 'short_description'], true);
    }
}