<?php

namespace App\Services;

use App\Models\Setting;
use App\Models\ShoppingOrder;
use Illuminate\Support\Facades\DB;
use Illuminate\Validation\ValidationException;

/**
 * AP-33a: Zentraler Versand-Statuswechsel einer Bestellung — extrahiert aus
 * SalesController::store(), damit Verkäufe-Modal und WaWi-Abwicklungs-Board
 * dieselbe Logik nutzen (Margin-/Provisionsfolgen, Storno-Flag, AP-13-Bestandsabzug).
 * Läuft transaktional mit lockForUpdate gegen Doppelklick/parallele Tabs.
 */
class OrderStatusService
{
    /**
     * @param  (\Closure(ShoppingOrder): ?string)|null  $precondition  Prüfung 08.09.2026 F-16: fachliche
     *                                                                 Vorbedingung, die innerhalb der Sperre
     *                                                                 erneut geprüft wird (liefert Fehlertext
     *                                                                 oder null). Sonst können zwei Requests
     *                                                                 denselben Ausgangsstatus lesen und sich
     *                                                                 gegenseitig überschreiben.
     *
     * @throws ValidationException
     */
    public function setShipped(int $orderId, int $shipped, ?int $userId = null, bool $lockStatus = false, ?\Closure $precondition = null): ShoppingOrder
    {
        return DB::transaction(function () use ($orderId, $shipped, $userId, $lockStatus, $precondition) {
            $shopping_order = ShoppingOrder::query()->lockForUpdate()->findOrFail($orderId);
            if ($precondition !== null && ($error = $precondition($shopping_order)) !== null) {
                throw ValidationException::withMessages(['shipped' => $error]);
            }
            $shopping_order->shipped = $shipped;
            if ($lockStatus) {
                // Kundenentscheid 16.07.2026 (AP-33): Status aus der WaWi gesetzt ⇒
                // die Bestell-Detailseite darf ihn nicht mehr automatisch verändern.
                $shopping_order->shipped_status_locked = true;
            }
            $shopping_order->save();
            // handel Promotion Product and credit by storno
            Payment::handelUserPromotionOrder($shopping_order);
            Payment::handelUserShopOrder($shopping_order);

            if ($shopping_order->getAPIShippedType() === 'sent' || $shopping_order->getAPIShippedType() === 'close') {
                if (! $shopping_order->shipped_at) {
                    $shopping_order->shipped_at = now();
                    $shopping_order->save();
                    // is shipped set pending_to
                    if ($shopping_order->shopping_order_margin) {
                        if ($shopping_order->shopping_order_margin->hasPartnerCommission()) {
                            $days = Setting::getContentBySlug('pending_partner_commissions_in_days');
                            $days = $days ? $days : 20;
                            $partner_commission_pending_to = $shopping_order->shipped_at;
                            $partner_commission_pending_to->addDays($days);
                            $shopping_order->shopping_order_margin->partner_commission_pending_to = $partner_commission_pending_to;
                            $shopping_order->shopping_order_margin->save();
                        } else {
                            $days = Setting::getContentBySlug('pending_order_margins_in_days');
                            $days = $days ? $days : 20;
                            $margin_pending_to = $shopping_order->shipped_at;
                            $margin_pending_to->addDays($days);
                            $shopping_order->shopping_order_margin->margin_pending_to = $margin_pending_to;
                            $shopping_order->shopping_order_margin->save();
                        }
                    }
                }
            } else {
                $shopping_order->shipped_at = null;
                $shopping_order->save();
                if ($shopping_order->shopping_order_margin) {
                    // zurücksetzen der pending_to
                    $shopping_order->shopping_order_margin->partner_commission_pending_to = null;
                    $shopping_order->shopping_order_margin->margin_pending_to = null;
                    $shopping_order->shopping_order_margin->save();
                }
            }
            if ($shopping_order->getAPIShippedType() === 'cancel') {
                if ($shopping_order->shopping_order_margin) {
                    $shopping_order->shopping_order_margin->cancellation = true;
                    $shopping_order->shopping_order_margin->partner_commission_pending_to = null;
                    $shopping_order->shopping_order_margin->margin_pending_to = null;
                    $shopping_order->shopping_order_margin->save();
                }
            } else {
                if ($shopping_order->shopping_order_margin && $shopping_order->shopping_order_margin->cancellation) {
                    $shopping_order->shopping_order_margin->cancellation = false;
                    $shopping_order->shopping_order_margin->partner_commission_pending_to = null;
                    $shopping_order->shopping_order_margin->margin_pending_to = null;
                    $shopping_order->shopping_order_margin->save();
                }
            }

            // AP-13: Verkaufs-Abgänge (Produktbestand) mit dem neuen Versandstatus abgleichen
            app(ProductStockService::class)->syncSaleStock($shopping_order, $userId);

            return $shopping_order;
        });
    }
}