<?php

namespace App\Http\Controllers\Web;

use App\Enums\ConversionSource;
use App\Http\Controllers\Controller;
use App\Models\Company;
use App\Models\PressRelease;
use App\Scopes\PortalScope;
use App\Services\Company\MergedNewsroomLookup;
use App\Services\Company\NewsroomClaimService;
use App\Support\WebPortalContext;
use Illuminate\Contracts\View\View;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Http\Response;
use Illuminate\Support\Facades\RateLimiter;
use Illuminate\Validation\ValidationException;

/**
 * Öffentliche Seite „Diesen Newsroom verwalten" (Roadmap 1b.2). Erreichbar
 * für jede Firma mit Slug — auch ohne veröffentlichte Meldung, denn der
 * Verwaltungszugang ist von der öffentlichen Sichtbarkeit unabhängig. Nur
 * 410-entfernte Newsrooms bleiben Tombstone, aufgegangene führen zum
 * Überlebenden.
 */
class NewsroomClaimController extends Controller
{
    public function __construct(
        private readonly NewsroomClaimService $claims,
        private readonly MergedNewsroomLookup $mergedNewsrooms,
    ) {}

    public function show(string $edition, string $slug): View|Response|RedirectResponse
    {
        $context = WebPortalContext::fromRequest();
        $company = $this->claims->findClaimable($context->portalValues, $slug);

        if (! $company) {
            return $this->resolveMissing($context, $edition, $slug);
        }

        return view('web.newsroom-claim', [
            'company' => $company,
            'recipients' => $this->claims->maskedRecipients($company),
            'unreachable' => $this->claims->isUnreachable($company),
        ]);
    }

    public function store(Request $request, string $edition, string $slug): RedirectResponse|Response
    {
        $context = WebPortalContext::fromRequest();
        $company = $this->claims->findClaimable($context->portalValues, $slug);

        if (! $company) {
            return $this->resolveMissing($context, $edition, $slug);
        }

        // Bot: neutral abnicken, bewusst vor allem anderen.
        if (filled($request->input('website'))) {
            return back()->with('newsroom-claim-status', __('static.newsroom_claim.flash_sent'));
        }

        $this->ensureNotRateLimited($request, $company->getKey());
        RateLimiter::hit($this->ipKey($request), 3600);
        RateLimiter::hit($this->companyKey($company->getKey()), 86400);

        if ($this->claims->recipients($company)->isEmpty()) {
            return back()->with($this->claims->isUnreachable($company) ? 'newsroom-claim-unreachable' : 'newsroom-claim-none', true);
        }

        // Enumeration-sicher: dieselbe Meldung, ob ein Konto deaktiviert ist
        // oder nicht — die Adresse ist ohnehin nur maskiert sichtbar.
        $this->claims->request($company, $request->ip(), $this->sourceOf($request), $this->landingPressReleaseId($request, $company));

        return back()->with('newsroom-claim-status', __('static.newsroom_claim.flash_sent'));
    }

    /**
     * Kam der Besucher aus der Veröffentlichungsmail einer Meldung (`pr` im
     * Link), landet er nach dem Login auf genau dieser Meldung samt Aufrufen
     * (Roadmap 1c.2) — sofern sie wirklich zu dieser Firma gehört.
     */
    private function landingPressReleaseId(Request $request, Company $company): ?int
    {
        $id = (int) $request->input('pr', 0);

        if ($id <= 0) {
            return null;
        }

        return PressRelease::query()->withoutGlobalScopes()->whereKey($id)->where('company_id', $company->getKey())->exists() ? $id : null;
    }

    private function resolveMissing(WebPortalContext $context, string $edition, string $slug): Response|RedirectResponse
    {
        $survivor = $this->mergedNewsrooms->survivorFor($context->portalValues, $slug);

        if ($survivor !== null && $survivor->gone_at === null) {
            // Host aus dem Request wie bei den anderen 301-Weiterleitungen —
            // route() allein trüge den konfigurierten Root-Host.
            return redirect(
                request()->getSchemeAndHttpHost().route('newsroom.claim', ['edition' => $edition, 'slug' => $survivor->slug], absolute: false),
                301,
            );
        }

        // 410-entfernt → Tombstone wie die Newsroom-Seite selbst; sonst 404.
        $gone = Company::query()
            ->withoutGlobalScope(PortalScope::class)
            ->whereIn('portal', $context->portalValues)
            ->where('slug', $slug)
            ->whereNotNull('gone_at')
            ->exists();

        if ($gone) {
            return response()->view('web.newsroom-tombstone', [], 410);
        }

        abort(404);
    }

    /**
     * Kam der Besucher aus einer Mail (`src` aus dem Link, per Formular
     * weitergereicht), trägt das Token diese Herkunft — sonst ist es der
     * Hinweis auf der Newsroom-Seite.
     */
    private function sourceOf(Request $request): ConversionSource
    {
        $source = ConversionSource::parse($request->filled('src') ? (string) $request->input('src') : null);

        return in_array($source, [ConversionSource::MailPublish, ConversionSource::MailReject], true)
            ? $source
            : ConversionSource::ProfileClaim;
    }

    private function ensureNotRateLimited(Request $request, int $companyId): void
    {
        $perDay = (int) config('newsroom.claim.links_per_day', 3);

        if (RateLimiter::tooManyAttempts($this->companyKey($companyId), $perDay)) {
            throw ValidationException::withMessages(['claim' => __('static.newsroom_claim.throttle_company')]);
        }

        if (RateLimiter::tooManyAttempts($this->ipKey($request), 15)) {
            throw ValidationException::withMessages(['claim' => __('static.newsroom_claim.throttle_ip')]);
        }
    }

    private function companyKey(int $companyId): string
    {
        return 'newsroom-claim|company|'.$companyId;
    }

    private function ipKey(Request $request): string
    {
        return 'newsroom-claim|ip|'.$request->ip();
    }
}