<?php

namespace App\Http\Controllers;

use Acme\Dhl\Models\DhlShipment;
use App\Jobs\CancelShipmentJob;
// Old DHL model replaced with new package model
use App\Jobs\CreateReturnLabelJob;
use App\Mail\MailDhlTracking;
use App\Models\Country;
use App\Models\ShoppingOrder;
use App\Services\DhlAddressValidator;
use App\Services\DhlModalService;
use App\Services\DhlProductResolver;
use App\Services\DhlShipmentService;
use App\Services\DhlShipmentWeightCalculator;
use App\Services\DhlTrackingService;
use Exception;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Http\Response;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Facades\Mail;
use Illuminate\Support\Facades\Storage;
use Illuminate\View\View;
use Symfony\Component\HttpFoundation\BinaryFileResponse;
// Import new DHL package and SettingController
use Yajra\DataTables\Facades\DataTables;
use ZipArchive;

/**
 * DHL Shipment Controller
 *
 * Handles all DHL shipment operations including creation, cancellation,
 * tracking, and return labels. Provides both web interface and AJAX endpoints.
 */
class DhlShipmentController extends Controller
{
    /**
     * Constructor
     */
    public function __construct()
    {
        $this->middleware('auth');
        $this->middleware('admin')->except(['show', 'track']);
    }

    /**
     * Test the DHL API login credentials and return a JSON response.
     *
     * @return \Illuminate\Http\JsonResponse
     */
    public function testLogin()
    {
        try {
            // Get DHL configuration with admin settings
            $settingController = new \App\Http\Controllers\SettingController;
            $dhlConfig = $settingController->getDhlConfig();
            // Create DhlClient with merged configuration
            $dhlClient = new \Acme\Dhl\Support\DhlClient(
                $dhlConfig['base_url'],
                $dhlConfig['api_key'],
                $dhlConfig['username'],
                $dhlConfig['password']
            );

            // Test the connection
            $connectionTest = $dhlClient->testConnection();

            if ($connectionTest) {
                $result = [
                    'success' => true,
                    'message' => 'DHL API Verbindung erfolgreich getestet! '.config('dhl.config_source').' '.$dhlConfig['base_url'],
                    'details' => [
                        'base_url' => $dhlConfig['base_url'],
                        'using_admin_config' => ! empty($dhlConfig['api_key']),
                    ],
                ];
            } else {
                $result = [
                    'success' => false,
                    'message' => 'DHL API Verbindung fehlgeschlagen. Prüfen Sie Ihre Zugangsdaten.',
                ];
            }

            return response()->json($result);
        } catch (Exception $e) {
            Log::error('[DHL Controller] Test login failed', [
                'error' => $e->getMessage(),
            ]);

            return response()->json([
                'success' => false,
                'message' => 'DHL API Test fehlgeschlagen: '.$e->getMessage(),
            ], 500);
        }
    }

    /**
     * Display the DHL Cockpit (main overview)
     */
    public function index(Request $request): View
    {
        // Statistics for dashboard widgets
        $stats = [
            'total_shipments' => DhlShipment::count(),
            'pending_shipments' => DhlShipment::where('status', 'pending')->count(),
            'shipped_today' => DhlShipment::whereDate('created_at', today())->count(),
            'returns_count' => DhlShipment::where('type', 'return')->count(),
        ];

        return view('admin.dhl.cockpit', compact('stats'));
    }

    /**
     * Provides data for the DHL Cockpit DataTable.
     */
    public function datatable(Request $request): JsonResponse
    {
        $query = DhlShipment::with(['shoppingOrder.shopping_user'])
            ->select('dhl_package_shipments.*') // Explicitly select to avoid conflicts
            ->orderBy('created_at', 'desc');

        // Apply filters from the request
        if ($request->filled('type')) {
            $query->where('type', $request->get('type'));
        }
        if ($request->filled('status')) {
            $status = DhlShipment::normalizeStatus($request->get('status'));
            if ($status === 'canceled') {
                $query->whereIn('status', ['canceled', 'cancelled']);
            } else {
                $query->where('status', $status);
            }
        }
        if ($request->filled('date_from')) {
            $query->whereDate('created_at', '>=', $request->get('date_from'));
        }
        if ($request->filled('date_to')) {
            $query->whereDate('created_at', '<=', $request->get('date_to'));
        }
        if ($request->filled('search')) {
            $search = $request->get('search');
            $query->where(function ($q) use ($search) {
                // Search in shipment fields
                $q->where('order_id', 'LIKE', "%{$search}%")
                    ->orWhere('dhl_shipment_no', 'LIKE', "%{$search}%")
                    ->orWhere('routing_code', 'LIKE', "%{$search}%")
                    ->orWhere('related_shipment_id', 'LIKE', "%{$search}%")
                    ->orWhere('billing_number', 'LIKE', "%{$search}%")
                    ->orWhere('firstname', 'LIKE', "%{$search}%")
                    ->orWhere('lastname', 'LIKE', "%{$search}%")
                    ->orWhere('company', 'LIKE', "%{$search}%");
            });
        }

        return DataTables::eloquent($query)
            ->addColumn('checkbox', function ($shipment) {
                return '<label class="custom-control custom-checkbox mb-0"><input type="checkbox" class="custom-control-input shipment-checkbox" value="'.$shipment->id.'"><span class="custom-control-label"></span></label>';
            })
            ->editColumn('id', function ($shipment) {
                $class = $shipment->type === 'return' ? 'text-warning font-weight-bold' : 'text-primary font-weight-semibold';
                $icon = $shipment->type === 'return' ? '<i class="fas fa-undo mr-1"></i>' : '';

                return '<a href="'.route('admin.dhl.show', $shipment).'" class="'.$class.'">'.$icon.'#'.$shipment->id.'</a>';
            })
            ->addColumn('type', function ($shipment) {
                if ($shipment->type == 'outbound') {
                    return '<span class="badge badge-primary"><i class="fas fa-arrow-right"></i> Ausgehend</span>';
                } else {
                    return '<span class="badge badge-warning" style="font-size: 0.9rem; font-weight: 600;"><i class="fas fa-undo"></i> RETOURE</span>';
                }
            })
            ->addColumn('order', function ($shipment) {
                if ($shipment->order_id) {
                    return '<a href="'.route('admin_sales_customers_detail', $shipment->order_id).'" class="text-primary">#'.$shipment->order_id.'</a>';
                }

                return '<span class="text-muted">N/A</span>';
            })
            ->addColumn('customer', function ($shipment) {
                return e(trim($shipment->firstname.' '.$shipment->lastname));
            })
            ->editColumn('dhl_shipment_no', function ($shipment) {
                return $shipment->dhl_shipment_no ? '<code class="text-success">'.e($shipment->dhl_shipment_no).'</code>' : '<span class="text-muted">-</span>';
            })
            ->addColumn('status', function ($shipment) {
                $statusMap = [
                    'pending' => ['class' => 'warning', 'text' => 'Wartend'],
                    'created' => ['class' => 'success', 'text' => 'Erstellt'],
                    'shipped' => ['class' => 'primary', 'text' => 'Versendet'],
                    'delivered' => ['class' => 'info', 'text' => 'Zugestellt'],
                    'canceled' => ['class' => 'secondary', 'text' => 'Storniert'],
                    'failed' => ['class' => 'danger', 'text' => 'Fehler'],
                ];
                $status = DhlShipment::normalizeStatus($shipment->status);
                $statusInfo = $statusMap[$status] ?? ['class' => 'light', 'text' => e($shipment->status)];

                return '<span class="badge badge-'.$statusInfo['class'].'">'.$statusInfo['text'].'</span>';
            })
            ->addColumn('tracking_status', function ($shipment) {
                if ($shipment->tracking_status) {
                    return '<small class="text-muted">'.e($shipment->tracking_status).'</small>'.
                        ($shipment->last_tracked_at ? '<br><small class="text-muted">'.$shipment->last_tracked_at->format('d.m.Y H:i').'</small>' : '');
                }

                return '<span class="text-muted">-</span>';
            })
            ->editColumn('weight_kg', function ($shipment) {
                return number_format($shipment->weight_kg, 2).' kg';
            })
            ->editColumn('created_at', function ($shipment) {
                return $shipment->created_at->format('d.m.Y H:i');
            })
            ->addColumn('actions', function ($shipment) {
                $buttons = '<div class="btn-group" role="group">';
                $buttons .= '<a href="'.route('admin.dhl.show', $shipment).'" class="btn btn-sm btn-outline-primary" data-toggle="tooltip" title="Details anzeigen"><i class="fas fa-eye"></i></a>';
                if ($shipment->label_path) {
                    $buttons .= '<a href="'.route('admin.dhl.download-label', $shipment).'" class="btn btn-sm btn-outline-success" data-toggle="tooltip" title="Label herunterladen"><i class="fas fa-download"></i></a>';
                }
                // Email button
                if ($shipment->dhl_shipment_no && $shipment->canSendTrackingEmail()) {
                    $emailTitle = $shipment->wasTrackingEmailSent()
                        ? 'Tracking-E-Mail erneut senden (gesendet: '.$shipment->tracking_email_sent_at->format('d.m.Y H:i').')'
                        : 'Tracking-E-Mail senden';
                    $emailClass = $shipment->wasTrackingEmailSent() ? 'btn-success' : 'btn-outline-info';
                    $buttons .= '<button type="button" class="btn btn-sm '.$emailClass.' send-tracking-email-btn" data-shipment-id="'.$shipment->id.'" data-toggle="tooltip" title="'.$emailTitle.'"><i class="fas fa-envelope"></i></button>';
                }
                // Cancel button
                if ($shipment->canCancel()) {
                    $buttons .= '<button type="button" class="btn btn-sm btn-outline-danger cancel-shipment-btn" data-shipment-id="'.$shipment->id.'" data-toggle="tooltip" title="Sendung stornieren"><i class="fas fa-ban"></i></button>';
                }
                // Return label button (for outbound shipments without existing return)
                if ($shipment->type == 'outbound' && ! $shipment->returns()->count()) {
                    $buttons .= '<button type="button" class="btn btn-sm btn-outline-info create-return-btn" data-shipment-id="'.$shipment->id.'" data-toggle="tooltip" title="Retourenlabel erstellen"><i class="fas fa-undo"></i></button>';
                }
                $buttons .= '</div>';

                return $buttons;
            })
            ->addColumn('DT_RowClass', function ($shipment) {
                return $shipment->type === 'return' ? 'return-shipment' : '';
            })
            ->rawColumns(['checkbox', 'id', 'type', 'order', 'customer', 'dhl_shipment_no', 'status', 'tracking_status', 'actions'])
            ->make(true);
    }

    /**
     * Show the form for creating a new shipment
     *
     * @return View
     */
    public function create(ShoppingOrder $order): View|\Illuminate\Http\RedirectResponse
    {
        // Check if order already has a shipment
        $existingShipment = DhlShipment::where('shopping_order_id', $order->id)
            ->where('type', 'outbound')
            ->first();

        if ($existingShipment) {
            return redirect()->route('admin.dhl.show', $existingShipment)
                ->with('warning', 'Für diese Bestellung existiert bereits eine Sendung.');
        }

        return view('admin.dhl.create', compact('order'));
    }

    /**
     * Store a new shipment (async via queue)
     */
    public function store(Request $request): JsonResponse
    {
        try {
            // Use DhlModalService for validation
            $dhlModalService = new DhlModalService;
            $validationResult = $dhlModalService->validateShipmentData($request->all());

            if (! $validationResult['valid']) {
                return response()->json([
                    'success' => false,
                    'message' => 'Validierungsfehler: '.implode(', ', $validationResult['errors']),
                ], 422);
            }

            // Basic Laravel validation as fallback
            $request->validate([
                'order_id' => 'required|exists:shopping_orders,id',
                'weight' => 'required|numeric|min:0.1|max:31.5',
                'product_code' => 'sometimes|string',
                'reference' => 'nullable|string|max:35',
                'priority' => 'sometimes|string|in:normal,high',
                'auto_track' => 'sometimes|boolean',
                // Shipping address validation
                'shipping_firstname' => 'required|string|max:50',
                'shipping_lastname' => 'required|string|max:50',
                'shipping_company' => 'nullable|string|max:100',
                'shipping_address' => 'required|string|max:100',
                'shipping_houseNumber' => 'required|string|max:50',
                'shipping_zipcode' => 'required|string|max:10',
                'shipping_city' => 'required|string|max:50',
                'shipping_country_id' => 'required|exists:countries,id',
                'shipping_phone' => 'nullable|string|max:20',
                'shipping_email' => 'required|email|max:100',
                'shipping_postnumber' => 'nullable|string|max:20',
            ]);

            $order = ShoppingOrder::findOrFail($request->order_id);
            $shipmentWeight = max(
                (float) $request->weight,
                (new DhlShipmentWeightCalculator)->calculate($order)
            );

            // Check if shipment already exists
            /* $existingShipment = DhlShipment::where('shopping_order_id', $order->id)
                ->where('type', 'outbound')
                ->first();

            if ($existingShipment) {
                return response()->json([
                    'success' => false,
                    'message' => 'Für diese Bestellung existiert bereits eine Sendung.'
                ], 422);
            }
            */

            // Use service to prepare address data
            $shippingAddress = $dhlModalService->prepareAddressForApi($request->all());

            // Prepare options for shipment creation
            $options = [
                'product_code' => $request->get('product_code', 'V01PAK'),
                'reference' => $request->get('reference'),
                'priority' => $request->get('priority', 'normal'),
                'auto_track' => $request->get('auto_track', true),
                'shipping_address' => $shippingAddress,
                'services' => $request->get('services', []),
                'dimensions' => $request->only(['length', 'width', 'height']),
            ];

            // Use DhlShipmentService (handles queue/sync automatically based on config)
            $dhlShipmentService = new DhlShipmentService;
            $result = $dhlShipmentService->createShipment($order, $shipmentWeight, $options);

            Log::info('[DHL Controller] Shipment creation processed', [
                'order_id' => $order->id,
                'weight' => $shipmentWeight,
                'requested_weight' => $request->weight,
                'queued' => $result['queued'] ?? false,
                'success' => $result['success'] ?? false,
            ]);

            if (! ($result['success'] ?? false)) {
                return response()->json($result, ($result['type'] ?? null) === 'dhl_address_validation' ? 422 : 500);
            }

            return response()->json($result);
        } catch (Exception $e) {
            Log::error('[DHL Controller] Failed to dispatch shipment creation', [
                'error' => $e->getMessage(),
                'order_id' => $request->order_id ?? 'unknown',
            ]);

            return response()->json([
                'success' => false,
                'message' => 'Fehler beim Erstellen der Sendung: '.$e->getMessage(),
            ], 500);
        }
    }

    public function validateAddress(Request $request, DhlAddressValidator $validator): JsonResponse
    {
        $country = $request->filled('shipping_country_id')
            ? Country::find($request->get('shipping_country_id'))
            : null;
        $resolver = new DhlProductResolver;

        $result = $validator->validate(array_merge($request->all(), [
            'shipping_country_code' => $country?->code,
        ]));
        $errors = $result['errors'];
        $warnings = $result['warnings'];
        $product = [
            'code' => $request->get('product_code'),
            'scope' => null,
            'scope_label' => 'Nicht geprüft',
            'country_code' => $country?->code,
            'country_label' => $country?->getLocated(),
        ];

        if ($country) {
            try {
                $resolvedProductCode = $resolver->resolveProductCode(
                    $country->code,
                    $request->get('product_code'),
                    config('dhl.default_product', 'V01PAK')
                );
                $product = [
                    'code' => $resolvedProductCode,
                    'scope' => $resolver->getProductScope($resolvedProductCode),
                    'scope_label' => $resolver->getProductScopeLabel($resolvedProductCode),
                    'country_code' => $country->code,
                    'country_label' => $country->getLocated(),
                ];
            } catch (\InvalidArgumentException $e) {
                $errors[] = $e->getMessage();
            }
        }

        $status = 'valid';
        if ($errors !== []) {
            $status = 'error';
        } elseif ($warnings !== []) {
            $status = 'warning';
        }

        return response()->json([
            'success' => $errors === [],
            'status' => $status,
            'can_create_label' => $errors === [],
            'errors' => array_values(array_unique($errors)),
            'warnings' => array_values(array_unique($warnings)),
            'message' => $this->addressValidationMessage($status),
            'preflight' => [
                'product' => $product,
                'address' => [
                    'status' => $result['status'],
                    'normalized' => $result['normalized'],
                    'validation_available' => $result['validation_available'],
                    'validation_level' => $result['validation_level'],
                    'validation_message' => $result['validation_message'],
                ],
            ],
        ], $errors === [] ? 200 : 422);
    }

    private function addressValidationMessage(string $status): string
    {
        return match ($status) {
            'valid' => 'Adresse ist formal versandfähig.',
            'warning' => 'Adresse ist formal versandfähig, sollte aber vor der Labelerstellung geprüft werden.',
            default => 'Adresse ist nicht versandfähig. Bitte korrigieren Sie die markierten Felder.',
        };
    }

    /**
     * Display the specified shipment
     */
    public function show(DhlShipment $shipment): View
    {
        $shipment->load([
            'shoppingOrder.shopping_user',
            'relatedShipment',
            'trackingEvents' => fn ($q) => $q->orderBy('event_time', 'desc'),
        ]);

        return view('admin.dhl.show', compact('shipment'));
    }

    /**
     * Cancel the specified shipment
     */
    public function cancel(Request $request, DhlShipment $shipment): JsonResponse
    {
        try {
            // Validate cancellation is possible
            if (! $shipment->canCancel()) {
                return response()->json([
                    'success' => false,
                    'message' => 'Diese Sendung kann nicht mehr storniert werden.',
                ], 422);
            }

            // Use DhlShipmentService (handles queue/sync automatically based on config)
            $options = [
                'priority' => $request->get('priority', 'normal'),
            ];

            $dhlShipmentService = new DhlShipmentService;
            $result = $dhlShipmentService->cancelShipment($shipment, $options);

            Log::info('[DHL Controller] Shipment cancellation processed', [
                'shipment_id' => $shipment->id,
                'dhl_shipment_no' => $shipment->dhl_shipment_no,
                'queued' => $result['queued'] ?? false,
                'success' => $result['success'] ?? false,
            ]);

            return response()->json($result);
        } catch (Exception $e) {
            Log::error('[DHL Controller] Failed to process shipment cancellation', [
                'error' => $e->getMessage(),
                'shipment_id' => $shipment->id,
            ]);

            return response()->json([
                'success' => false,
                'message' => 'Fehler beim Stornieren der Sendung: '.$e->getMessage(),
            ], 500);
        }
    }

    /**
     * Create return label for the specified shipment
     */
    public function createReturnLabel(Request $request, DhlShipment $shipment): JsonResponse
    {
        try {
            // Validate return label creation is possible
            if ($shipment->type !== 'outbound') {
                return response()->json([
                    'success' => false,
                    'message' => 'Retourenlabels können nur für ausgehende Sendungen erstellt werden.',
                ], 422);
            }

            // Check if return label already exists
            $existingReturn = DhlShipment::where('related_shipment_id', $shipment->id)
                ->where('type', 'return')
                ->first();

            if ($existingReturn) {
                return response()->json([
                    'success' => false,
                    'message' => 'Für diese Sendung existiert bereits ein Retourenlabel.',
                ], 422);
            }

            // Check DHL_USE_QUEUE configuration
            $settingController = new SettingController;
            $dhlConfig = $settingController->getDhlConfig();
            $useQueue = $dhlConfig['use_queue'] ?? false;

            if ($useQueue) {
                // Dispatch return label creation job
                $options = [
                    'auto_track' => $request->get('auto_track', false),
                    'priority' => $request->get('priority', 'normal'),
                ];

                CreateReturnLabelJob::dispatch($shipment, $options);

                Log::info('[DHL Controller] Return label creation job dispatched', [
                    'original_shipment_id' => $shipment->id,
                    'shipment_number' => $shipment->dhl_shipment_no,
                ]);

                return response()->json([
                    'success' => true,
                    'message' => 'Retourenlabel wird im Hintergrund erstellt. Dies kann einige Sekunden dauern.',
                ]);
            } else {
                // Create synchronously
                $result = $this->createReturnLabelSync($shipment);

                return response()->json($result);
            }
        } catch (Exception $e) {
            Log::error('[DHL Controller] Failed to create return label', [
                'error' => $e->getMessage(),
                'shipment_id' => $shipment->id,
            ]);

            return response()->json([
                'success' => false,
                'message' => 'Fehler beim Erstellen des Retourenlabels: '.$e->getMessage(),
            ], 500);
        }
    }

    /**
     * Get billing address for return label (used when original delivery was to Packstation)
     */
    private function getBillingAddressForReturn($shippingUser, array $recipient): array
    {
        if (! $shippingUser) {
            Log::warning('[DHL Controller] No shipping user found, using recipient country only', [
                'order_recipient_country' => $recipient['country'] ?? null,
            ]);

            // Fallback: use recipient data but without Packstation fields.
            // We keep ISO-2 country codes here so that ReturnsService /
            // DhlProductResolver can normalize / validate them consistently.
            return [
                'name' => trim(($recipient['firstname'] ?? '').' '.($recipient['lastname'] ?? '')),
                'name2' => $recipient['company'] ?? '',
                'street' => 'Adresse fehlt',
                'houseNumber' => '',
                'postalCode' => $recipient['postalCode'] ?? '',
                'city' => $recipient['city'] ?? '',
                'country' => $recipient['country'] ?? DhlProductResolver::DOMESTIC_COUNTRY,
                'email' => $recipient['email'] ?? '',
                'phone' => $recipient['phone'] ?? '',
            ];
        }

        // Parse billing address to extract street and house number
        $billingAddress = trim($shippingUser->billing_address ?? '');
        $street = $billingAddress;
        $houseNumber = '';

        // Try to extract house number from address
        if (preg_match('/^(.+?)\s+(\d+[a-zA-Z]?[-\/\d]*)$/u', $billingAddress, $matches)) {
            $street = trim($matches[1]);
            $houseNumber = trim($matches[2]);
        }

        return [
            'name' => trim(($shippingUser->billing_firstname ?? '').' '.($shippingUser->billing_lastname ?? '')),
            'name2' => $shippingUser->billing_company ?? '',
            'street' => $street,
            'houseNumber' => $houseNumber,
            'postalCode' => $shippingUser->billing_zipcode ?? '',
            'city' => $shippingUser->billing_city ?? '',
            'country' => $shippingUser->billing_country?->code ?? DhlProductResolver::DOMESTIC_COUNTRY,
            'email' => $shippingUser->billing_email ?? '',
            'phone' => $shippingUser->billing_phone ?? '',
        ];
    }

    /**
     * Create return label synchronously
     */
    private function createReturnLabelSync(DhlShipment $shipment): array
    {
        try {
            Log::info('[DHL Controller] Creating return label synchronously', [
                'original_shipment_id' => $shipment->id,
            ]);

            // Get DHL configuration
            $settingController = new SettingController;
            $dhlConfig = $settingController->getDhlConfig();

            // Initialize DHL client
            $dhlClient = new \Acme\Dhl\Support\DhlClient(
                $dhlConfig['base_url'],
                $dhlConfig['api_key'],
                $dhlConfig['username'],
                $dhlConfig['password']
            );

            // Use ReturnsService instead of ShippingService
            $returnsService = new \Acme\Dhl\Services\ReturnsService($dhlClient);

            // Prepare return label data
            $order = $shipment->shoppingOrder;
            $recipient = $shipment->recipient ?? [];

            // Check if this is a Packstation delivery - use billing address as return sender
            $hasPostNumber = ! empty($recipient['postnumber'] ?? $recipient['postNumber'] ?? '');

            if ($hasPostNumber) {
                Log::info('[DHL Controller] Packstation detected - using billing address for return sender', [
                    'shipment_id' => $shipment->id,
                    'order_id' => $order->id,
                ]);

                // Load billing address from order
                $shippingUser = $order->shopping_user;
                $shipperAddress = $this->getBillingAddressForReturn($shippingUser, $recipient);
            } else {
                // Use original recipient address (normal delivery)
                $shipperAddress = [
                    'name' => trim(($recipient['firstname'] ?? '').' '.($recipient['lastname'] ?? '')),
                    'name2' => $recipient['company'] ?? '',
                    'street' => $recipient['street'] ?? '',
                    'houseNumber' => $recipient['houseNumber'] ?? '',
                    'postalCode' => $recipient['postalCode'] ?? '',
                    'city' => $recipient['city'] ?? '',
                    'country' => $recipient['country'] ?? DhlProductResolver::DOMESTIC_COUNTRY,
                    'email' => $recipient['email'] ?? '',
                    'phone' => $recipient['phone'] ?? '',
                ];
            }

            $returnData = [
                'order_id' => $order->id,
                'original_shipment_id' => $shipment->id,
                'weight_kg' => $shipment->weight_kg,
                'label_format' => $shipment->label_format ?? 'PDF',

                // Shipper: Customer sends back to us (using billing address for Packstation)
                'shipper' => $shipperAddress,

                // Consignee: Our warehouse
                'consignee' => [
                    'name' => $dhlConfig['sender']['company'] ?? 'mivita care gmbh',
                    'name2' => $dhlConfig['sender']['name'] ?? '',
                    'street' => $dhlConfig['sender']['street'] ?? 'Leinfeld',
                    'houseNumber' => $dhlConfig['sender']['house_number'] ?? '2',
                    'postalCode' => $dhlConfig['sender']['postalCode'] ?? '87755',
                    'city' => $dhlConfig['sender']['city'] ?? 'Kirchhaslach',
                    'country' => $dhlConfig['sender']['country'] ?? DhlProductResolver::DOMESTIC_COUNTRY,
                    'email' => $dhlConfig['sender']['email'] ?? 'versand@mivita.care',
                    'phone' => $dhlConfig['sender']['phone'] ?? '+49 123 456789',
                ],
            ];

            // Create the return label using ReturnsService
            $result = $returnsService->createReturn($returnData);

            Log::info('[DHL Controller] Return label created successfully (sync)', [
                'original_shipment_id' => $shipment->id,
                'return_shipment_number' => $result['returnNumber'] ?? 'N/A',
            ]);

            return [
                'success' => true,
                'message' => 'Retourenlabel wurde erfolgreich erstellt!',
                'shipment_number' => $result['returnNumber'] ?? null,
                'return_shipment' => $result['returnShipment'] ?? null,
            ];
        } catch (Exception $e) {
            Log::error('[DHL Controller] Return label creation failed (sync)', [
                'original_shipment_id' => $shipment->id,
                'error' => $e->getMessage(),
            ]);

            return [
                'success' => false,
                'message' => 'Fehler beim Erstellen des Retourenlabels: '.$e->getMessage(),
            ];
        }
    }

    /**
     * Update tracking status for the specified shipment
     */
    public function updateTracking(DhlShipment $shipment): JsonResponse
    {
        try {
            if (! $shipment->dhl_shipment_no) {
                return response()->json([
                    'success' => false,
                    'message' => 'Keine DHL-Sendungsnummer verfügbar.',
                ], 422);
            }

            // Use DhlTrackingService (handles queue/sync automatically based on config)
            $dhlTrackingService = new DhlTrackingService;
            $result = $dhlTrackingService->updateTracking($shipment, ['auto_retrack' => false]);

            Log::info('[DHL Controller] Tracking update processed', [
                'shipment_id' => $shipment->id,
                'dhl_shipment_no' => $shipment->dhl_shipment_no,
                'queued' => $result['queued'] ?? false,
                'success' => $result['success'] ?? false,
            ]);

            return response()->json($result);
        } catch (Exception $e) {
            Log::error('[DHL Controller] Failed to process tracking update', [
                'error' => $e->getMessage(),
                'shipment_id' => $shipment->id,
            ]);

            return response()->json([
                'success' => false,
                'message' => 'Fehler beim Aktualisieren der Tracking-Informationen: '.$e->getMessage(),
            ], 500);
        }
    }

    /**
     * Send tracking email to customer (supports multiple shipments per order)
     */
    public function sendTrackingEmail(DhlShipment $shipment): JsonResponse
    {
        try {
            // Check if shipment has tracking number
            if (! $shipment->dhl_shipment_no) {
                return response()->json([
                    'success' => false,
                    'message' => 'Keine DHL-Sendungsnummer verfügbar.',
                ], 422);
            }

            // Check if shipment can send email
            if (! $shipment->canSendTrackingEmail()) {
                return response()->json([
                    'success' => false,
                    'message' => 'E-Mail kann nicht gesendet werden. Bestellung oder E-Mail-Adresse fehlt.',
                ], 422);
            }

            $order = $shipment->shoppingOrder;

            // Determine recipient email: prefer shipment email, fallback to shopping user email
            $recipientEmail = null;
            if (! empty($shipment->email)) {
                $recipientEmail = $shipment->email;
            } elseif ($order->shopping_user && ! empty($order->shopping_user->email)) {
                $recipientEmail = $order->shopping_user->email;
            }

            if (! $recipientEmail) {
                return response()->json([
                    'success' => false,
                    'message' => 'Keine Empfänger-E-Mail-Adresse verfügbar.',
                ], 422);
            }

            // Collect all shipments for this order that have tracking numbers
            $allShipments = DhlShipment::where('order_id', $order->id)
                ->whereNotNull('dhl_shipment_no')
                ->whereIn('status', ['created', 'in_transit', 'out_for_delivery'])
                ->orderBy('created_at', 'asc')
                ->get();

            // If no shipments found, use only the current one
            if ($allShipments->isEmpty()) {
                $allShipments = collect([$shipment]);
            }

            // Send email with all shipments
            Mail::to($recipientEmail)->send(new MailDhlTracking($allShipments, $order));

            // Mark all included shipments as sent
            foreach ($allShipments as $s) {
                $s->markTrackingEmailSent('manual', $recipientEmail, $allShipments);
            }

            Log::info('[DHL Controller] Tracking email sent', [
                'shipment_ids' => $allShipments->pluck('id')->toArray(),
                'shipments_count' => $allShipments->count(),
                'dhl_shipment_nos' => $allShipments->pluck('dhl_shipment_no')->toArray(),
                'email' => $recipientEmail,
                'type' => 'manual',
            ]);

            $message = $allShipments->count() > 1
                ? "Tracking-E-Mail mit {$allShipments->count()} Sendungen wurde erfolgreich an {$recipientEmail} gesendet."
                : "Tracking-E-Mail wurde erfolgreich an {$recipientEmail} gesendet.";

            return response()->json([
                'success' => true,
                'message' => $message,
                'sent_at' => now()->format('d.m.Y H:i'),
                'shipments_count' => $allShipments->count(),
            ]);
        } catch (Exception $e) {
            Log::error('[DHL Controller] Failed to send tracking email', [
                'error' => $e->getMessage(),
                'shipment_id' => $shipment->id,
            ]);

            return response()->json([
                'success' => false,
                'message' => 'Fehler beim Senden der Tracking-E-Mail: '.$e->getMessage(),
            ], 500);
        }
    }

    /**
     * Download shipping label
     */
    public function downloadLabel(DhlShipment $shipment): Response
    {
        try {
            if (! $shipment->label_path || ! Storage::exists($shipment->label_path)) {
                abort(404, 'Versandlabel nicht gefunden.');
            }

            $labelContent = Storage::get($shipment->label_path);

            // Generate descriptive filename
            $filename = $this->generateLabelFilename($shipment);

            return response($labelContent, 200)
                ->header('Content-Type', 'application/pdf')
                ->header('Content-Disposition', "attachment; filename=\"{$filename}\"");
        } catch (Exception $e) {
            Log::error('[DHL Controller] Failed to download label', [
                'error' => $e->getMessage(),
                'shipment_id' => $shipment->id,
                'label_path' => $shipment->label_path,
            ]);

            abort(500, 'Fehler beim Download des Versandlabels.');
        }
    }

    /**
     * Generate descriptive filename for DHL label
     * Format: DHL-Kundenname-Sendungsnummer-Datum.pdf
     * Example: DHL-Geraldine-Seebacher-0034043333301020015589177-15092025.pdf
     */
    private function generateLabelFilename(DhlShipment $shipment): string
    {
        // Load order with customer data
        $customerName = $shipment->firstname.'_'.$shipment->lastname;
        if ($shipment->company) {
            $customerName = $shipment->company;
        }

        // Clean customer name for filename (remove special characters)
        $customerName = preg_replace('/[^a-zA-Z0-9\-]/', '', $customerName);
        $customerName = preg_replace('/-+/', '-', $customerName); // Remove multiple dashes
        $customerName = trim($customerName, '-'); // Remove leading/trailing dashes

        // Get shipment number
        $shipmentNumber = $shipment->dhl_shipment_no ?: $shipment->id;

        // Get creation date
        $date = $shipment->created_at->format('d_m_Y');

        // Build filename
        $filename = sprintf(
            'DHL-%s-%s-%s.pdf',
            $customerName,
            $shipmentNumber,
            $date
        );

        // Ensure filename is not too long (max 255 characters)
        if (strlen($filename) > 255) {
            $maxCustomerLength = 255 - strlen('DHL--'.$shipmentNumber.'-'.$date.'.pdf');
            $customerName = substr($customerName, 0, max(10, $maxCustomerLength));
            $filename = sprintf(
                'DHL-%s-%s-%s.pdf',
                $customerName,
                $shipmentNumber,
                $date
            );
        }

        return $filename;
    }

    /**
     * Batch operations (multiple shipments)
     *
     * @return JsonResponse|BinaryFileResponse
     */
    public function batchAction(Request $request)
    {
        try {
            $request->validate([
                'action' => 'required|in:cancel,download_labels,update_tracking',
                'shipment_ids' => 'required|array|min:1',
                'shipment_ids.*' => 'exists:dhl_package_shipments,id',
            ]);

            $shipmentIds = $request->shipment_ids;
            $action = $request->action;
            $processed = 0;
            $errors = [];
            $labels = []; // For batch label download

            foreach ($shipmentIds as $shipmentId) {
                try {
                    $shipment = DhlShipment::findOrFail($shipmentId);

                    switch ($action) {
                        case 'cancel':
                            if ($shipment->canCancel()) {
                                CancelShipmentJob::dispatch($shipment);
                                $processed++;
                            } else {
                                $errors[] = "Sendung {$shipment->shipment_number} kann nicht storniert werden.";
                            }
                            break;

                        case 'update_tracking':
                            if ($shipment->dhl_shipment_no) {
                                $dhlTrackingService = new DhlTrackingService;
                                $trackingResult = $dhlTrackingService->updateTracking($shipment, ['auto_retrack' => false]);

                                if ($trackingResult['success']) {
                                    $processed++;
                                } else {
                                    $errors[] = "Sendung #{$shipment->id}: ".$trackingResult['message'];
                                }
                            } else {
                                $errors[] = "Sendung #{$shipment->id} hat keine DHL-Sendungsnummer.";
                            }
                            break;

                        case 'download_labels':
                            if ($shipment->label_path && Storage::exists($shipment->label_path)) {
                                $labels[] = [
                                    'shipment' => $shipment,
                                    'filename' => $this->generateLabelFilename($shipment),
                                    'path' => $shipment->label_path,
                                ];
                                $processed++;
                            } else {
                                $errors[] = "Sendung #{$shipment->id} hat kein verfügbares Label.";
                            }
                            break;
                    }
                } catch (Exception $e) {
                    $errors[] = "Fehler bei Sendung {$shipmentId}: ".$e->getMessage();
                }
            }

            // Handle batch label download
            if ($action === 'download_labels' && ! empty($labels)) {
                return $this->createLabelsZip($labels);
            }

            Log::info('[DHL Controller] Batch action executed', [
                'action' => $action,
                'processed' => $processed,
                'errors_count' => count($errors),
            ]);

            return response()->json([
                'success' => $processed > 0,
                'message' => sprintf('%d Sendungen verarbeitet.', $processed),
                'processed' => $processed,
                'errors' => $errors,
            ]);
        } catch (Exception $e) {
            Log::error('[DHL Controller] Batch action failed', [
                'error' => $e->getMessage(),
                'action' => $request->action ?? 'unknown',
            ]);

            return response()->json([
                'success' => false,
                'message' => 'Fehler bei der Stapelverarbeitung: '.$e->getMessage(),
            ], 500);
        }
    }

    /**
     * Public tracking page (for customers)
     */
    public function track(Request $request): View|JsonResponse
    {
        if ($request->expectsJson()) {
            $request->validate([
                'tracking_number' => 'required|string|min:10',
            ]);

            try {
                $shipment = DhlShipment::where('dhl_shipment_no', $request->tracking_number)->first();

                if (! $shipment) {
                    return response()->json([
                        'success' => false,
                        'message' => 'Sendung nicht gefunden.',
                    ], 404);
                }

                // Use DhlTrackingService for tracking update
                $dhlTrackingService = new DhlTrackingService;
                $trackingResult = $dhlTrackingService->updateTracking($shipment, ['auto_retrack' => false]);

                return response()->json([
                    'success' => $trackingResult['success'],
                    'message' => $trackingResult['message'],
                    'data' => [
                        'dhl_shipment_no' => $shipment->dhl_shipment_no,
                        'status' => $shipment->status,
                        'tracking_status' => $shipment->tracking_status,
                        'last_tracked_at' => $shipment->last_tracked_at?->format('d.m.Y H:i'),
                    ],
                ]);
            } catch (Exception $e) {
                Log::error('[DHL Controller] Public tracking failed', [
                    'error' => $e->getMessage(),
                    'tracking_number' => $request->tracking_number ?? 'unknown',
                ]);

                return response()->json([
                    'success' => false,
                    'message' => 'Fehler beim Abrufen der Tracking-Informationen.',
                ], 500);
            }
        }

        return view('public.tracking');
    }

    /**
     * Create ZIP file with multiple labels
     *
     * @param  array  $labels  Array of label data
     * @return Response|BinaryFileResponse
     */
    private function createLabelsZip(array $labels)
    {
        try {
            $zip = new ZipArchive;
            $zipFilename = 'dhl_labels_'.date('Y-m-d_H-i-s').'.zip';
            $zipPath = storage_path('app/temp/'.$zipFilename);

            // Ensure temp directory exists
            if (! file_exists(storage_path('app/temp'))) {
                mkdir(storage_path('app/temp'), 0755, true);
            }

            if ($zip->open($zipPath, ZipArchive::CREATE) !== true) {
                throw new Exception('ZIP-Datei konnte nicht erstellt werden.');
            }

            $addedFiles = 0;
            foreach ($labels as $labelData) {
                $shipment = $labelData['shipment'];
                $filename = $labelData['filename'];
                $filePath = $labelData['path'];

                if (Storage::exists($filePath)) {
                    $content = Storage::get($filePath);
                    $zip->addFromString($filename, $content);
                    $addedFiles++;
                }
            }

            $zip->close();

            if ($addedFiles === 0) {
                throw new Exception('Keine Labels konnten zur ZIP-Datei hinzugefügt werden.');
            }

            Log::info('[DHL Controller] Labels ZIP created', [
                'zip_file' => $zipFilename,
                'files_count' => $addedFiles,
                'total_labels' => count($labels),
            ]);

            return response()->download($zipPath, $zipFilename)->deleteFileAfterSend(true);
        } catch (Exception $e) {
            Log::error('[DHL Controller] Failed to create labels ZIP', [
                'error' => $e->getMessage(),
                'labels_count' => count($labels),
            ]);

            return response()->json([
                'success' => false,
                'message' => 'Fehler beim Erstellen der ZIP-Datei: '.$e->getMessage(),
            ], 500);
        }
    }
}