<?php

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Controller;
use App\Mail\PaymentReceivedMail;
use App\Models\Order;
use App\Services\InvoiceService;
use App\Services\OrderService;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Mail;

class OrderController extends Controller
{
    public function __construct(
        private OrderService $orderService,
        private InvoiceService $invoiceService,
    ) {}

    public function index(Request $request)
    {
        $query = Order::with('addresses')->latest();

        if ($request->filled('status')) {
            $query->where('status', $request->status);
        }
        if ($request->filled('payment')) {
            $query->where('payment_method', $request->payment);
        }
        if ($request->filled('q')) {
            $query->where('order_number', 'like', '%'.$request->q.'%');
        }

        $orders = $query->paginate(25);
        return view('admin.orders.index', compact('orders'));
    }

    public function show(Order $order)
    {
        $order->load('items', 'addresses', 'user');
        return view('admin.orders.show', compact('order'));
    }

    public function updateStatus(Request $request, Order $order)
    {
        $data = $request->validate([
            'status'        => 'required|in:' . implode(',', array_keys(Order::$statusLabels)),
            'tracking_code' => 'nullable|string|max:255',
        ]);

        $this->orderService->updateStatus($order, $data['status'], $data['tracking_code'] ?? null);

        // Bei Zahlungseingang: Rechnung per Mail senden
        if ($data['status'] === 'payment_received') {
            $pdf   = $this->invoiceService->generate($order);
            $email = $order->guest_email ?? $order->user?->email;
            if ($email) {
                Mail::to($email)->send(new PaymentReceivedMail($order, $pdf->output(), $this->invoiceService->filename($order)));
            }
        }

        return back()->with('success', 'Status aktualisiert.');
    }

    public function sendInvoice(Order $order)
    {
        $pdf   = $this->invoiceService->generate($order);
        $email = $order->guest_email ?? $order->user?->email;
        if ($email) {
            Mail::to($email)->send(new PaymentReceivedMail($order, $pdf->output(), $this->invoiceService->filename($order)));
        }
        return back()->with('success', 'Rechnung erneut gesendet.');
    }

    public function downloadInvoice(Order $order)
    {
        return $this->invoiceService->generate($order)->download($this->invoiceService->filename($order));
    }

    public function exportCsv()
    {
        $orders = Order::with(['items','billingAddress'])->orderByDesc('created_at')->get();

        $rows = [];
        $rows[] = ['Bestellnr.','Datum','Status','Zahlungsart','Kunde','E-Mail','Zwischensumme','Rabatt','Versand','Gesamt','MwSt.'];

        foreach ($orders as $order) {
            $addr = $order->billingAddress();
            $rows[] = [
                $order->order_number,
                $order->created_at->format('d.m.Y H:i'),
                Order::$statusLabels[$order->status] ?? $order->status,
                Order::$paymentLabels[$order->payment_method] ?? $order->payment_method,
                $addr ? $addr->full_name : ($order->guest_email ?? ''),
                $order->guest_email ?? $order->user?->email ?? '',
                number_format($order->subtotal, 2, ',', '.'),
                number_format($order->discount_amount ?? 0, 2, ',', '.'),
                number_format($order->shipping_cost, 2, ',', '.'),
                number_format($order->total, 2, ',', '.'),
                number_format($order->tax_total, 2, ',', '.'),
            ];
        }

        $csv = "\xEF\xBB\xBF"; // UTF-8 BOM für Excel
        foreach ($rows as $row) {
            $csv .= implode(';', array_map(fn($v) => '"' . str_replace('"', '""', $v) . '"', $row)) . "\n";
        }

        return response($csv, 200, [
            'Content-Type'        => 'text/csv; charset=UTF-8',
            'Content-Disposition' => 'attachment; filename="bestellungen-' . date('Y-m-d') . '.csv"',
        ]);
    }
}