<?php

namespace App\Http\Controllers\Web;

use App\Http\Controllers\Controller;
use App\Models\ChangelogEntry;
use App\Services\Changelog\ChangelogTimeline;
use App\Support\DomainAssetContext;
use Illuminate\Contracts\View\View;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Http\Response;
use Illuminate\Support\Carbon;
use Illuminate\Support\Str;

/**
 * Öffentlicher Changelog unter pressekonto.com/changelog mit RSS-Feed
 * (Decision-Update Changelog, E2). Er gehört zum Hub; auf den Portalen leitet
 * die Adresse dorthin weiter.
 */
class ChangelogController extends Controller
{
    public function __construct(private readonly ChangelogTimeline $timeline) {}

    public function index(Request $request): View|RedirectResponse
    {
        if (! $this->onHub($request)) {
            return redirect($this->hubBase().'/changelog', 301);
        }

        DomainAssetContext::applyWebDomainConfig('pressekonto');

        return view('web.changelog', [
            'entries' => $this->timeline->entries(),
            'feedUrl' => $this->hubBase().'/changelog/feed',
        ]);
    }

    public function feed(Request $request): Response|RedirectResponse
    {
        if (! $this->onHub($request)) {
            return redirect($this->hubBase().'/changelog/feed', 301);
        }

        $base = $this->hubBase();
        $entries = $this->timeline->entries(50);

        $items = $entries->map(fn (ChangelogEntry $entry): array => [
            'title' => $entry->category->label().': '.Str::limit($entry->publicText(), 90),
            'link' => $base.'/changelog#eintrag-'.$entry->id,
            'published_at' => $entry->released_on->copy()->setTime(12, 0)->toRfc2822String(),
            'description' => $entry->publicText(),
            'category' => $entry->category->label(),
            'creator' => null,
        ])->all();

        $xml = view('web.feed', [
            'channel' => [
                'title' => 'pressekonto – Changelog',
                'link' => $base.'/changelog',
                'self' => $base.'/changelog/feed',
                'description' => 'Neuerungen auf pressekonto, presseecho und businessportal24.',
                'language' => 'de',
                'last_build' => ($entries->first()?->released_on?->copy()->setTime(12, 0) ?? Carbon::now())->toRfc2822String(),
            ],
            'items' => $items,
        ])->render();

        return response($xml, 200, ['Content-Type' => 'application/rss+xml; charset=UTF-8']);
    }

    private function onHub(Request $request): bool
    {
        return str_contains($request->getHost(), 'pressekonto');
    }

    private function hubBase(): string
    {
        return rtrim((string) config('domains.domain_portal_url'), '/');
    }
}