<?php

namespace App\Http\Controllers\Web;

use App\Http\Controllers\Controller;
use App\Http\Requests\Abo\UpdateAboCreditCardRequest;
use App\Models\AboCardUpdateLink;
use App\Services\AboPaymentMethodService;

/**
 * Login-free credit-card update via a tokenized link (sent by a consultant to a customer).
 * Card data is entered exclusively by the customer here; routes are rate-limited. The token
 * is looked up by its SHA-256 hash and is single-use + TTL-bound.
 */
class AboCardUpdateController extends Controller
{
    public function show(string $token)
    {
        $link = $this->resolveRedeemableLink($token);

        return view('portal.abo.card_update_link', [
            'user_abo' => $link->user_abo,
            'token' => $token,
        ]);
    }

    public function store(UpdateAboCreditCardRequest $request, string $token, AboPaymentMethodService $service)
    {
        $link = $this->resolveRedeemableLink($token);
        $user_abo = $link->user_abo;

        $returnUrls = [
            'successurl' => route('abo_card_update_return', [$token, 'success']),
            'errorurl' => route('abo_card_update_return', [$token, 'error']),
            'backurl' => route('abo_card_update_return', [$token, 'cancel']),
        ];

        $result = $service->updateCreditCard($user_abo, $request->toDto(), $returnUrls, 'link');

        if ($result->isApproved()) {
            $link->forceFill(['used_at' => now()])->save();

            return view('portal.abo.card_update_done', ['success' => true]);
        }

        if ($result->isRedirect()) {
            session(['abo_card_update.'.$user_abo->id => [
                'carddata' => $result->carddata,
                'userid' => $result->userid,
            ]]);

            return redirect()->away($result->redirectUrl);
        }

        return redirect(route('abo_card_update_show', [$token]))
            ->withErrors(['cc_cardpan' => $result->errorMessage ?? __('abo.card_update_failed')]);
    }

    /**
     * Startet den Stripe-Setup-Flow "Zahlungsart ändern" (Plan S5) über den
     * tokenisierten Link: Redirect zur Hosted-Seite, freie Zahlartenwahl.
     */
    public function startStripe(string $token, AboPaymentMethodService $service)
    {
        $link = $this->resolveRedeemableLink($token);
        abort_unless($service->usesStripeChange(), 404);

        $result = $service->beginStripeChange(
            $link->user_abo,
            route('abo_card_update_return', [$token, 'success']).'?session_id={CHECKOUT_SESSION_ID}',
            route('abo_card_update_return', [$token, 'cancel']),
            'link',
        );

        if ($result->isRedirect()) {
            return redirect()->away($result->redirectUrl);
        }

        return redirect(route('abo_card_update_show', [$token]))
            ->withErrors(['cc_cardpan' => $result->errorMessage ?? __('abo.payment_method_change_failed')]);
    }

    public function return(string $token, string $status, AboPaymentMethodService $service)
    {
        $link = $this->resolveRedeemableLink($token);
        $user_abo = $link->user_abo;

        // Stripe-Setup-Return (Plan S5): Session prüfen, Zahlungsart verankern, Link entwerten.
        if ($status === 'success' && ($sessionId = request('session_id'))) {
            if ($service->finalizeStripeChangeFromSession($user_abo, (string) $sessionId, 'link')) {
                $link->forceFill(['used_at' => now()])->save();

                return view('portal.abo.card_update_done', ['success' => true]);
            }

            return view('portal.abo.card_update_done', ['success' => false]);
        }

        $stash = session()->pull('abo_card_update.'.$user_abo->id);

        if ($status === 'success' && is_array($stash)) {
            $service->applyNewCard($user_abo, $stash['carddata'], (int) ($stash['userid'] ?? 0), 'link');
            $link->forceFill(['used_at' => now()])->save();

            return view('portal.abo.card_update_done', ['success' => true]);
        }

        $user_abo->forceFill(['card_update_pending_at' => null])->save();

        return view('portal.abo.card_update_done', ['success' => false]);
    }

    private function resolveRedeemableLink(string $token): AboCardUpdateLink
    {
        $link = AboCardUpdateLink::where('token_hash', AboCardUpdateLink::hashToken($token))->first();

        if (! $link || ! $link->isRedeemable()) {
            abort(410, __('abo.card_update_link_invalid'));
        }

        $abo = $link->user_abo;
        if (! $abo || ! app(AboPaymentMethodService::class)->canStartChange($abo)) {
            abort(410, __('abo.card_update_link_invalid'));
        }

        return $link;
    }
}