<?php

declare(strict_types=1);

namespace Esun\MultiLocaleTranslation\Model;

use Magento\Framework\App\State;
use Magento\Framework\Exception\LocalizedException;
use Magento\Store\Model\StoreManagerInterface;
use Mageplaza\Blog\Model\Post;

class BlogPostTranslationApplier
{
    public function __construct(
        private readonly CmsTranslationRepository $translationRepository,
        private readonly StoreManagerInterface $storeManager,
        private readonly State $appState
    ) {
    }

    public function apply(Post $post): void
    {
        if (!$this->isFrontend() || !$post->getId()) {
            return;
        }
        $storeId = (int)$this->storeManager->getStore()->getId();
        if ($storeId <= 0) {
            return;
        }

        $translations = $this->translationRepository->getTranslations(
            (int)$post->getId(),
            $storeId,
            CmsTranslationRepository::ENTITY_BLOG_POST,
            BlogPostFields::codes()
        );
        $this->applyValues($post, $translations);
    }

    /** @param Post[] $posts */
    public function applyMany(array $posts): void
    {
        if (!$this->isFrontend() || $posts === []) {
            return;
        }
        $storeId = (int)$this->storeManager->getStore()->getId();
        if ($storeId <= 0) {
            return;
        }

        $postIds = [];
        foreach ($posts as $post) {
            if ($post instanceof Post && $post->getId()) {
                $postIds[] = (int)$post->getId();
            }
        }
        $translations = $this->translationRepository->getTranslationsForEntities(
            $postIds,
            $storeId,
            CmsTranslationRepository::ENTITY_BLOG_POST,
            BlogPostFields::codes()
        );
        foreach ($posts as $post) {
            if (!$post instanceof Post || !$post->getId()) {
                continue;
            }
            $this->applyValues($post, $translations[(int)$post->getId()] ?? []);
        }
    }

    private function applyValues(Post $post, array $translations): void
    {
        foreach (BlogPostFields::codes() as $field) {
            if (array_key_exists($field, $translations)) {
                $post->setData($field, $translations[$field]);
            }
        }
    }

    private function isFrontend(): bool
    {
        try {
            return $this->appState->getAreaCode() === 'frontend';
        } catch (LocalizedException) {
            return false;
        }
    }
}