<?php

namespace App\Services;

use App\Models\UserAbo;
use App\Services\Payment\PaymentProviderManager;
use App\Services\Payment\Payone\DTOs\CardUpdateResult;
use App\Services\Payment\Payone\DTOs\CreditCardCheckData;
use App\Services\Payment\Payone\PayonePaymentService;
use Illuminate\Support\Facades\DB;
use Throwable;

/**
 * Orchestrates updating the credit-card token of an existing Abo via PAYONE
 * (creditcardcheck + preauthorization, no charge — see the Phase-1 plan
 * dev/2026-06-25-kreditkarte-update/). The card data is entered exclusively by the
 * Abo owner; guard-/owner-specific authorization happens in the calling controller,
 * the card-only/active invariant in {@see UserAbo::canUpdatePaymentMethod()}.
 */
class AboPaymentMethodService
{
    public function __construct(private readonly PayonePaymentService $payone) {}

    /**
     * Runs the card update. On success the new token is written atomically; a 3-D Secure
     * challenge is surfaced as a REDIRECT outcome (finalized after return via
     * {@see applyNewCard()}); failures leave the stored card untouched.
     *
     * @param  array<string, string>  $returnUrls  successurl/errorurl/backurl for the 3DS redirect.
     */
    public function updateCreditCard(UserAbo $abo, CreditCardCheckData $card, array $returnUrls, ?string $source = null): CardUpdateResult
    {
        if (app(PaymentProviderManager::class)->aboPaymentsFrozen()) {
            return CardUpdateResult::error(__('payment.abo_payments_frozen'));
        }

        if (! $abo->canUpdatePaymentMethod()) {
            return CardUpdateResult::error(__('abo.card_update_not_allowed'));
        }

        $shoppingUser = $abo->shopping_user;
        if (! $shoppingUser) {
            return CardUpdateResult::error(__('abo.card_update_failed'));
        }

        $mode = $this->resolveMode($abo);

        // Konsistenz-Spur: vor externem PAYONE-Call + DB-Write setzen, damit ein Crash
        // zwischen erfolgreichem PAYONE-Call und DB-Write auffindbar bleibt.
        $abo->forceFill(['card_update_pending_at' => now()])->save();

        $result = $this->payone->refreshAboCardToken($shoppingUser, $card, $returnUrls, $mode);

        if ($result->isApproved()) {
            $this->applyNewCard($abo, $result->carddata, $result->userid, $source);
            // 1-Cent-Reservierung freigeben; Fehler hier ist unkritisch (verfällt sonst).
            $this->safelyReleasePreauth($result->txid, $mode);

            return $result;
        }

        if ($result->isRedirect()) {
            // Pending-Spur bleibt bestehen; Finalisierung nach 3DS-Rückkehr (Controller).
            return $result;
        }

        // Fehler: Spur zurücknehmen, kein DB-Update.
        $abo->forceFill(['card_update_pending_at' => null])->save();

        return $result;
    }

    /**
     * Writes the new card token atomically and idempotently and clears the pending trace.
     * Also used by the 3-D-Secure return path after successful authentication.
     *
     * @param  array<string, mixed>  $carddata
     */
    public function applyNewCard(UserAbo $abo, array $carddata, int $userid, ?string $source = null): void
    {
        try {
            DB::transaction(function () use ($abo, $carddata, $userid, $source) {
                $abo->forceFill([
                    'carddata' => $carddata,
                    'payone_userid' => $userid,
                    'card_update_pending_at' => null,
                ])->save();

                $abo->card_changes()->create([
                    'masked_card' => UserAbo::formatMaskedCard($carddata),
                    'source' => $source,
                ]);
            });
        } catch (Throwable $e) {
            // PAYONE hat die neue Karte, der lokale DB-Write schlug fehl → Inkonsistenz:
            // card_update_pending_at bleibt gesetzt (auffindbare Spur), CRITICAL-Alert.
            MyLog::writeLog(
                'payment',
                'critical',
                'Kreditkarten-Update: DB-Write nach erfolgreichem PAYONE-Call fehlgeschlagen (Abo '.$abo->id.')',
                ['user_abo_id' => $abo->id, 'payone_userid' => $userid, 'exception' => $e->getMessage()],
            );

            throw $e;
        }
    }

    private function safelyReleasePreauth(string $txid, string $mode): void
    {
        if ($txid === '') {
            return;
        }

        try {
            $this->payone->releasePreauth($txid, $mode);
        } catch (Throwable $e) {
            MyLog::writeLog(
                'payone',
                'warning',
                'Preauth-Freigabe (capture amount=0) fehlgeschlagen, Reservierung verfällt',
                ['txid' => $txid, 'error' => $e->getMessage()],
                false,
            );
        }
    }

    private function resolveMode(UserAbo $abo): string
    {
        return $abo->initialShoppingPayment()?->mode ?: config('payone.defaults.mode');
    }
}