<?php

namespace App\Support;

abstract class StructuredData
{
    /**
     * @param  array<int, array<string, mixed>>  $graph
     * @return array<string, mixed>
     */
    protected static function wrap(array $graph): array
    {
        return [
            '@context' => 'https://schema.org',
            '@graph' => array_values($graph),
        ];
    }

    protected static function siteUrl(): string
    {
        return url('/');
    }

    protected static function siteName(): string
    {
        return (string) setting('site_name', config('app.name'));
    }

    /**
     * @return array<string, mixed>
     */
    protected static function websiteNode(?string $searchUrlTemplate = null): array
    {
        $siteUrl = static::siteUrl();
        $siteName = static::siteName();

        $node = [
            '@type' => 'WebSite',
            '@id' => $siteUrl . '#website',
            'url' => $siteUrl,
            'name' => $siteName,
            'inLanguage' => app()->getLocale(),
            'publisher' => ['@id' => $siteUrl . '#organization'],
        ];

        if ($searchUrlTemplate) {
            $node['potentialAction'] = [
                '@type' => 'SearchAction',
                'target' => [
                    '@type' => 'EntryPoint',
                    'urlTemplate' => $searchUrlTemplate,
                ],
                'query-input' => 'required name=search_term_string',
            ];
        }

        return $node;
    }

    protected static function organizationNode(): array
    {
        $siteUrl = static::siteUrl();
        $siteName = static::siteName();

        $node = [
            '@type' => 'Organization',
            '@id' => $siteUrl . '#organization',
            'name' => $siteName,
            'url' => $siteUrl,
        ];

        $logo = setting('site_logo');
        if ($logo) {
            $logoUrl = str_starts_with($logo, 'http') ? $logo : asset('storage/' . ltrim($logo, '/'));
            $node['logo'] = [
                '@type' => 'ImageObject',
                'url' => $logoUrl,
            ];
        }

        $phone = setting('contact_phone');
        if ($phone) {
            $node['telephone'] = $phone;
        }

        $email = setting('contact_email');
        if ($email) {
            $node['email'] = $email;
        }

        $address = setting('contact_address');
        if ($address) {
            $node['address'] = [
                '@type' => 'PostalAddress',
                'streetAddress' => $address,
            ];
        }

        $socialLinks = setting('social_links');
        if ($socialLinks) {
            $links = is_string($socialLinks) ? json_decode($socialLinks, true) : $socialLinks;
            if (is_array($links)) {
                $sameAs = [];
                foreach ($links as $platform => $url) {
                    if (!empty($url)) {
                        $sameAs[] = $url;
                    }
                }
                if (!empty($sameAs)) {
                    $node['sameAs'] = $sameAs;
                }
            }
        }

        return $node;
    }

    /**
     * @param  array<int, array{name: string, item: string}>  $items
     * @return array<string, mixed>
     */
    protected static function breadcrumbNode(string $pageUrl, array $items): array
    {
        $elements = [];

        foreach ($items as $index => $item) {
            $elements[] = [
                '@type' => 'ListItem',
                'position' => $index + 1,
                'name' => $item['name'],
                'item' => $item['item'],
            ];
        }

        return [
            '@type' => 'BreadcrumbList',
            '@id' => $pageUrl . '#breadcrumb',
            'itemListElement' => $elements,
        ];
    }

    /**
     * @param  array<string, mixed>  $extra
     * @return array<string, mixed>
     */
    protected static function webPageNode(
        string $pageUrl,
        string $name,
        ?string $description = null,
        array $extra = [],
    ): array {
        $node = array_merge([
            '@type' => 'WebPage',
            '@id' => $pageUrl . '#webpage',
            'url' => $pageUrl,
            'name' => $name,
            'inLanguage' => app()->getLocale(),
            'isPartOf' => ['@id' => static::siteUrl() . '#website'],
            'breadcrumb' => ['@id' => $pageUrl . '#breadcrumb'],
        ], $extra);

        if ($description) {
            $node['description'] = $description;
        }

        return $node;
    }

    /**
     * @return array<string, mixed>
     */
    protected static function listItem(int $position, array $item): array
    {
        return [
            '@type' => 'ListItem',
            'position' => $position,
            'item' => $item,
        ];
    }
}