<?php

namespace App\Services;

use App\Models\Article;
use App\Models\Feed;
use SimplePie\SimplePie;

class FeedFetcher
{
    public function __construct(private OgImageResolver $ogResolver) {}
    public function fetch(Feed $feed): void
    {
        $simplepie = new SimplePie();
        $simplepie->set_feed_url($feed->url);
        $simplepie->enable_cache(false); // you're doing your own caching in the DB
        $simplepie->init();

        if ($simplepie->error()) {
            report(new \RuntimeException("Feed fetch failed for {$feed->url}: {$simplepie->error()}"));
            return;
        }

        foreach ($simplepie->get_items() as $item) {
            $imageUrl = $this->extractImage($item);

            $attributes = [
                'title' => strip_tags($item->get_title()),
                'description' => strip_tags($item->get_description() ?? ''),
                'link' => $item->get_permalink(),
                'author' => $item->get_author()?->get_name(),
                'published_at' => $item->get_date('Y-m-d H:i:s'),
            ];

            if ($imageUrl) {
                $attributes['image_url'] = $imageUrl;
            }

            $article = Article::updateOrCreate(
                ['feed_id' => $feed->id, 'guid' => $item->get_id()],
                $attributes
            );

            if (! $article->image_url && ! $article->image_checked_at) {
                $og = $this->ogResolver->resolve($article->link);
                $article->update([
                    'image_url' => $og,
                    'image_checked_at' => now(),
                ]);
            }
        }
    }

    private function extractImage($item): ?string
    {
        $mediaContents = $item->get_item_tags('http://search.yahoo.com/mrss/', 'content');

        if (empty($mediaContents)) {
            $enclosure = $item->get_enclosure();
            $link = $enclosure?->get_thumbnail() ?? $enclosure?->get_link();
            return $link ? html_entity_decode($link) : null;
        }

        usort($mediaContents, fn ($a, $b) =>
            (int) ($b['attribs']['']['width'] ?? 0) <=> (int) ($a['attribs']['']['width'] ?? 0)
        );

        return $mediaContents[0]['attribs']['']['url'] ?? null;
    }
}