<?php

namespace App\Services;

use App\Models\News;
use Illuminate\Http\Request;
use Illuminate\Pagination\Paginator;
use Illuminate\Support\Str;

class SeoService
{
    public function routeUrl(string $name, mixed $parameters = []): string
    {
        return $this->absoluteUrl(route($name, $parameters, false));
    }

    public function absoluteUrl(string $path): string
    {
        if (Str::startsWith($path, ['https://', 'http://'])) {
            return $path;
        }

        return rtrim(config('app.url'), '/').'/'.ltrim($path, '/');
    }

    /** @return array<string, mixed> */
    public function forRequest(Request $request): array
    {
        $name = config('moonwell.realm.server_name', 'MoonWell');
        $name = strcasecmp($name, 'MoonWell') === 0 ? 'MoonWell' : $name;
        $version = config('moonwell.realm.client_version', '1.12.1');
        $rate = config('moonwell.realm.rates.experience', 'x1');
        $home = $this->routeUrl('landing.index');
        $route = $request->route()?->getName();
        $article = $request->route('news');
        $indexable = in_array($route, ['landing.index', 'news.index', 'news.show'], true);
        $title = match ($route) {
            'landing.index' => "{$name} — PvP сервер WoW Vanilla {$version} {$rate}",
            'news.index' => "Новости сервера WoW {$version} — {$name}",
            'news.show' => $article instanceof News ? "{$article->title} — {$name}" : $name,
            'legal.offer' => "Публичная оферта — {$name}",
            'legal.privacy' => "Политика обработки персональных данных — {$name}",
            'legal.rules' => "Правила проекта — {$name}",
            'login' => "Вход в личный кабинет — {$name}",
            'cabinet.index' => "Личный кабинет — {$name}",
            'admin.accounts.index' => "Аккаунты и инвайты — {$name}",
            'admin.balances.index' => "Слёзы Элуны — {$name}",
            'admin.shop.index' => "Магазин — {$name}",
            'admin.news.index' => "Новости — {$name}",
            'admin.login-screen-news.index' => "Новости WoW — {$name}",
            default => $name,
        };
        $description = match ($route) {
            'landing.index' => "{$name} — русскоязычный PvP сервер World of Warcraft Vanilla {$version} с рейтами {$rate}. Классический Азерот, подземелья и рейды. Создай аккаунт и начни играть.",
            'news.index' => "Новости PvP сервера WoW Vanilla {$version} {$name}: обновления, события, патчноуты и объявления проекта.",
            'news.show' => $article instanceof News
                ? Str::limit(Str::squish(html_entity_decode(strip_tags($article->body), ENT_QUOTES | ENT_HTML5, 'UTF-8')), 160)
                : '',
            'legal.offer' => "Публичная оферта о заключении договора возмездного оказания цифровых услуг {$name}.",
            'legal.privacy' => "Политика обработки и защиты данных пользователей {$name}.",
            'legal.rules' => "Запрещённые действия, меры ответственности и порядок обжалования санкций в проекте {$name}.",
            'login' => "Вход в личный кабинет игрового сервера {$name}.",
            'cabinet.index' => "Персонажи, баланс и настройки игрового аккаунта {$name}.",
            default => '',
        };
        $canonical = match ($route) {
            'landing.index' => $home,
            'news.index' => $this->routeUrl('news.index', Paginator::resolveCurrentPage() > 1 ? ['page' => Paginator::resolveCurrentPage()] : []),
            'news.show' => $article instanceof News ? $this->routeUrl('news.show', $article) : null,
            default => null,
        };

        if ($route === 'news.index' && Paginator::resolveCurrentPage() > 1) {
            $title .= ' — страница '.Paginator::resolveCurrentPage();
        }

        $image = $this->absoluteUrl($article instanceof News && $article->image_url ? $article->image_url : '/landing.png');
        $graph = [];

        if ($indexable) {
            $graph[] = [
                '@type' => 'WebSite',
                '@id' => $home.'#website',
                'url' => $home,
                'name' => $name,
                'alternateName' => 'Лунный колодец',
                'inLanguage' => 'ru-RU',
            ];
            $graph[] = [
                '@type' => $route === 'news.index' ? 'CollectionPage' : 'WebPage',
                '@id' => $canonical.'#webpage',
                'url' => $canonical,
                'name' => $title,
                'description' => $description,
                'inLanguage' => 'ru-RU',
                'isPartOf' => ['@id' => $home.'#website'],
            ];

            if ($route === 'news.show' && $article instanceof News) {
                $graph[] = array_filter([
                    '@type' => 'NewsArticle',
                    'headline' => $article->title,
                    'description' => $description,
                    'image' => $image,
                    'datePublished' => $article->created_at?->toIso8601String(),
                    'dateModified' => $article->updated_at?->toIso8601String(),
                    'inLanguage' => 'ru-RU',
                    'mainEntityOfPage' => ['@id' => $canonical.'#webpage'],
                    'author' => ['@type' => 'Organization', 'name' => $name, 'url' => $home],
                    'publisher' => ['@type' => 'Organization', 'name' => $name, 'url' => $home],
                ], static fn (mixed $value): bool => $value !== null);
            }
        }

        $seo = [
            'title' => $title,
            'description' => $description,
            'canonical' => $canonical,
            'robots' => $indexable && config('seo.indexable') ? 'index, follow, max-image-preview:large' : 'noindex, follow',
            'type' => $route === 'news.show' ? 'article' : 'website',
            'image' => $image,
            'site_name' => $name,
            'published_at' => $route === 'news.show' && $article instanceof News ? $article->created_at?->toIso8601String() : null,
            'modified_at' => $route === 'news.show' && $article instanceof News ? $article->updated_at?->toIso8601String() : null,
            'structured_data' => $graph ? ['@context' => 'https://schema.org', '@graph' => $graph] : null,
        ];

        // Inertia manages these same server-rendered tags on subsequent visits.
        $seo['head'] = array_map('trim', preg_split('/\R(?=<)/', trim(view('seo.head', ['seo' => $seo])->render())));

        return $seo;
    }
}