<?php

namespace App\Http\Controllers;

use App\Models\LegalPage;
use Illuminate\Support\Str;
use Inertia\Inertia;
use Inertia\Response;
use League\CommonMark\Environment\Environment;
use League\CommonMark\Extension\Autolink\AutolinkExtension;
use League\CommonMark\Extension\CommonMark\CommonMarkCoreExtension;
use League\CommonMark\Extension\Strikethrough\StrikethroughExtension;
use League\CommonMark\Extension\Table\TableExtension;
use League\CommonMark\Extension\TaskList\TaskListExtension;
use League\CommonMark\MarkdownConverter;

class LegalPageController extends Controller
{
    public function show(?string $slug = null): Response
    {
        $resolvedSlug = $this->resolveSlug($slug);

        $page = LegalPage::query()
            ->where('slug', $resolvedSlug)
            ->where('is_published', true)
            ->orderByDesc('version')
            ->first();

        if (! $page) {
            abort(404);
        }

        $locale = app()->getLocale();
        $title = $page->title[$locale]
            ?? $page->title[$page->locale_fallback]
            ?? $page->title['de']
            ?? $page->title['en']
            ?? Str::title($resolvedSlug);

        $bodyMarkdown = $page->body_markdown[$locale]
            ?? $page->body_markdown[$page->locale_fallback]
            ?? reset($page->body_markdown)
            ?? '';

        $effectiveFrom = optional($page->effective_from);

        return Inertia::render('legal/Show', [
            'seoTitle' => $title . ' - ' . config('app.name', 'Fotospiel'),
            'title' => $title,
            'content' => $this->convertMarkdownToHtml($bodyMarkdown),
            'effectiveFrom' => $effectiveFrom ? $effectiveFrom->toDateString() : null,
            'effectiveFromLabel' => $effectiveFrom
                ? __('legal.effective_from', ['date' => $effectiveFrom->translatedFormat('d. F Y')])
                : null,
            'versionLabel' => __('legal.version', ['version' => $page->version]),
            'slug' => $resolvedSlug,
        ]);
    }

    private function resolveSlug(?string $slug): string
    {
        $slug = strtolower($slug ?? '');

        $aliases = [
            'imprint' => 'impressum',
            'privacy' => 'datenschutz',
            'terms' => 'agb',
        ];

        return $aliases[$slug] ?? $slug ?: 'impressum';
    }

    private function convertMarkdownToHtml(string $markdown): string
    {
        $environment = new Environment([
            'html_input' => 'strip',
            'allow_unsafe_links' => false,
        ]);

        $environment->addExtension(new CommonMarkCoreExtension());
        $environment->addExtension(new TableExtension());
        $environment->addExtension(new AutolinkExtension());
        $environment->addExtension(new StrikethroughExtension());
        $environment->addExtension(new TaskListExtension());

        $converter = new MarkdownConverter($environment);

        return trim((string) $converter->convert($markdown));
    }
}