<?php

namespace Botble\RssFeed\Supports;

use Botble\Base\Facades\Html;
use Botble\Language\Facades\Language;
use Botble\RssFeed\Feed;
use Exception;
use Illuminate\Support\Collection;

class RssFeed
{
    public function addFeedLink(string $url, string $title): self
    {
        add_filter(THEME_FRONT_HEADER, function ($html) use ($url, $title) {
            $html .= Html::style($url, [
                    'rel' => 'alternate',
                    'type' => 'application/atom+xml',
                    'title' => $title,
                    'media' => null,
                ])->toHtml() . "\n";

            if (is_plugin_active('language')) {
                $supportedLocales = Language::getSupportedLocales();

                foreach (array_keys($supportedLocales) as $supportedLocale) {
                    if ($supportedLocale == Language::getDefaultLocale()) {
                        continue;
                    }

                    $html .= Html::style(Language::getLocalizedURL($supportedLocale, $url), [
                            'rel' => 'alternate',
                            'type' => 'application/atom+xml',
                            'title' => $title,
                            'media' => null,
                        ])->toHtml() . "\n";
                }
            }

            return $html;
        }, 112);

        return $this;
    }

    public function renderFeedItems(Collection $items, string $title, string $description): Feed
    {
        return new Feed($title, $items, request()->url(), 'plugins/rss-feed::rss', $description, 'en-US');
    }

    public function remoteFilesize(string $url): int
    {
        if (! $url) {
            return 0;
        }

        try {
            $data = get_headers($url, true);

            if (isset($data['Content-Length'])) {
                return (int) $data['Content-Length'];
            }
        } catch (Exception) {
            return 0;
        }

        return 0;
    }
}
