fix(checkout): use full email template with PDF attachment for checkout API route

shop/app/api/orders/checkout/route.ts

@@ -7,6 +7,8 @@ import { createHash } from 'crypto';
 import { renderToBuffer } from '@react-pdf/renderer';
 import React from 'react';
 import { InvoicePDF } from '@/components/invoice-pdf';
+import { buildEmailItemsSection } from '@/lib/actions/orders';
+import { getOrderEmailTemplate } from '@/lib/actions/email-templates';
 
 function generateOrderNumber(prefix: 'BE' | 'AE' = 'AE'): string {
   const year = new Date().getFullYear();
@@ -144,11 +146,128 @@ export async function POST(request: Request) {
       // Trigger E-Mail notifications
       if (user.email) {
         try {
+          const formattedDate = new Date(order.created_at).toLocaleDateString('de-DE');
+          const taxRate = orderSnapshot.tax_rate ?? 19;
+          const items = orderSnapshot.items ?? [];
+          const oneTimeItems = items.filter((item: any) => item.billing_interval === 'one_time');
+          const monthlyItems = items.filter((item: any) => item.billing_interval === 'monthly');
+
+          const oneTimeNet = oneTimeItems.reduce((sum: number, item: any) => sum + (item.item_total || 0), 0);
+          const oneTimeTax = Math.round(oneTimeNet * (taxRate / 100) * 100) / 100;
+          const oneTimeGross = Math.round((oneTimeNet + oneTimeTax) * 100) / 100;
+
+          const monthlyNet = monthlyItems.reduce((sum: number, item: any) => sum + (item.item_total || 0), 0);
+          const monthlyTax = Math.round(monthlyNet * (taxRate / 100) * 100) / 100;
+          const monthlyGross = Math.round((monthlyNet + monthlyTax) * 100) / 100;
+
+          let totalDetailsText = '';
+          if (oneTimeNet > 0 && monthlyNet > 0) {
+            totalDetailsText = `\nEinmaliger Betrag:\n- Netto: ${oneTimeNet.toLocaleString('de-DE', { style: 'currency', currency: 'EUR' })}\n- zzgl. ${taxRate}% MwSt: ${oneTimeTax.toLocaleString('de-DE', { style: 'currency', currency: 'EUR' })}\n- Brutto Gesamtbetrag: ${oneTimeGross.toLocaleString('de-DE', { style: 'currency', currency: 'EUR' })}\n\nMonatlicher Betrag:\n- Netto: ${monthlyNet.toLocaleString('de-DE', { style: 'currency', currency: 'EUR' })} / Monat\n- zzgl. ${taxRate}% MwSt: ${monthlyTax.toLocaleString('de-DE', { style: 'currency', currency: 'EUR' })} / Monat\n- Brutto Gesamtbetrag: ${monthlyGross.toLocaleString('de-DE', { style: 'currency', currency: 'EUR' })} / Monat`;
+          } else if (oneTimeNet > 0) {
+            totalDetailsText = `\nGesamtsumme:\n- Netto: ${oneTimeNet.toLocaleString('de-DE', { style: 'currency', currency: 'EUR' })}\n- zzgl. ${taxRate}% MwSt: ${oneTimeTax.toLocaleString('de-DE', { style: 'currency', currency: 'EUR' })}\n- Brutto Gesamtbetrag: ${oneTimeGross.toLocaleString('de-DE', { style: 'currency', currency: 'EUR' })}`;
+          } else {
+            totalDetailsText = `\nGesamtsumme:\n- Netto: ${monthlyNet.toLocaleString('de-DE', { style: 'currency', currency: 'EUR' })} / Monat\n- zzgl. ${taxRate}% MwSt: ${monthlyTax.toLocaleString('de-DE', { style: 'currency', currency: 'EUR' })} / Monat\n- Brutto Gesamtbetrag: ${monthlyGross.toLocaleString('de-DE', { style: 'currency', currency: 'EUR' })} / Monat`;
+          }
+
+          let totalDetailsHtml = '';
+          if (oneTimeNet > 0 && monthlyNet > 0) {
+            totalDetailsHtml = `
+              <tr>
+                <td colspan="2" style="padding: 8px 0; border-top: 1px solid #e2e8f0; font-weight: bold; color: #0f172a;">Einmaliger Betrag:</td>
+              </tr>
+              <tr>
+                <td style="padding: 4px 0; padding-left: 10px; color: #475569;">Netto:</td>
+                <td style="padding: 4px 0; text-align: right; color: #475569;">${oneTimeNet.toLocaleString('de-DE', { style: 'currency', currency: 'EUR' })}</td>
+              </tr>
+              <tr>
+                <td style="padding: 4px 0; padding-left: 10px; color: #475569;">zzgl. ${taxRate}% MwSt:</td>
+                <td style="padding: 4px 0; text-align: right; color: #475569;">${oneTimeTax.toLocaleString('de-DE', { style: 'currency', currency: 'EUR' })}</td>
+              </tr>
+              <tr>
+                <td style="padding: 4px 0; padding-left: 10px; font-weight: bold; color: #0f172a;">Brutto Gesamtbetrag:</td>
+                <td style="padding: 4px 0; text-align: right; font-weight: bold; color: #0f172a;">${oneTimeGross.toLocaleString('de-DE', { style: 'currency', currency: 'EUR' })}</td>
+              </tr>
+              <tr>
+                <td colspan="2" style="padding: 8px 0; border-top: 1px solid #e2e8f0; font-weight: bold; color: #0f172a;">Monatlicher Betrag:</td>
+              </tr>
+              <tr>
+                <td style="padding: 4px 0; padding-left: 10px; color: #475569;">Netto:</td>
+                <td style="padding: 4px 0; text-align: right; color: #475569;">${monthlyNet.toLocaleString('de-DE', { style: 'currency', currency: 'EUR' })} / Monat</td>
+              </tr>
+              <tr>
+                <td style="padding: 4px 0; padding-left: 10px; color: #475569;">zzgl. ${taxRate}% MwSt:</td>
+                <td style="padding: 4px 0; text-align: right; color: #475569;">${monthlyTax.toLocaleString('de-DE', { style: 'currency', currency: 'EUR' })} / Monat</td>
+              </tr>
+              <tr>
+                <td style="padding: 4px 0; padding-left: 10px; font-weight: bold; color: #0f172a;">Brutto Gesamtbetrag:</td>
+                <td style="padding: 4px 0; text-align: right; font-weight: bold; color: #0f172a;">${monthlyGross.toLocaleString('de-DE', { style: 'currency', currency: 'EUR' })} / Monat</td>
+              </tr>
+            `;
+          } else if (oneTimeNet > 0) {
+            totalDetailsHtml = `
+              <tr>
+                <td style="padding: 4px 0; color: #475569;">Netto-Gesamtbetrag:</td>
+                <td style="padding: 4px 0; text-align: right; color: #475569;">${oneTimeNet.toLocaleString('de-DE', { style: 'currency', currency: 'EUR' })}</td>
+              </tr>
+              <tr>
+                <td style="padding: 4px 0; color: #475569;">zzgl. ${taxRate}% MwSt:</td>
+                <td style="padding: 4px 0; text-align: right; color: #475569;">${oneTimeTax.toLocaleString('de-DE', { style: 'currency', currency: 'EUR' })}</td>
+              </tr>
+              <tr>
+                <td style="padding: 4px 0; font-weight: bold; color: #0f172a; border-top: 1px solid #e2e8f0; padding-top: 6px;">Gesamtbetrag (brutto):</td>
+                <td style="padding: 4px 0; text-align: right; font-weight: bold; color: #0f172a; border-top: 1px solid #e2e8f0; padding-top: 6px;">${oneTimeGross.toLocaleString('de-DE', { style: 'currency', currency: 'EUR' })}</td>
+              </tr>
+            `;
+          } else {
+            totalDetailsHtml = `
+              <tr>
+                <td style="padding: 4px 0; color: #475569;">Netto-Gesamtbetrag:</td>
+                <td style="padding: 4px 0; text-align: right; color: #475569;">${monthlyNet.toLocaleString('de-DE', { style: 'currency', currency: 'EUR' })} / Monat</td>
+              </tr>
+              <tr>
+                <td style="padding: 4px 0; color: #475569;">zzgl. ${taxRate}% MwSt:</td>
+                <td style="padding: 4px 0; text-align: right; color: #475569;">${monthlyTax.toLocaleString('de-DE', { style: 'currency', currency: 'EUR' })} / Monat</td>
+              </tr>
+              <tr>
+                <td style="padding: 4px 0; font-weight: bold; color: #0f172a; border-top: 1px solid #e2e8f0; padding-top: 6px;">Gesamtbetrag (brutto):</td>
+                <td style="padding: 4px 0; text-align: right; font-weight: bold; color: #0f172a; border-top: 1px solid #e2e8f0; padding-top: 6px;">${monthlyGross.toLocaleString('de-DE', { style: 'currency', currency: 'EUR' })} / Monat</td>
+              </tr>
+            `;
+          }
+
+          const itemsSection = buildEmailItemsSection(items);
+
+          const emailTemplate = getOrderEmailTemplate({
+            orderNumber: order.order_number,
+            formattedDate,
+            customerCompanyName: customerSnapshot.company_name,
+            totalDetailsText,
+            totalDetailsHtml,
+            itemsDetailsText: itemsSection.text,
+            itemsDetailsHtml: itemsSection.html
+          }, `${process.env.NEXT_PUBLIC_SITE_URL || 'https://staging.hephex.de'}`, false);
+
+          const { data: bufferData, error: downloadError } = await supabase
+            .storage
+            .from('invoices')
+            .download(fileName);
+
+          const attachments: any[] = [];
+          if (!downloadError && bufferData) {
+            const buffer = Buffer.from(await bufferData.arrayBuffer());
+            attachments.push({
+              filename: `Anfragebestaetigung_${order.order_number}.pdf`,
+              content: buffer,
+              contentType: 'application/pdf',
+            });
+          }
+
           await sendMail({
             to: user.email,
-            subject: `Bestätigung Ihrer CASPOS-Anfrage ${order.order_number}`,
-            text: `Vielen Dank für Ihre Anfrage ${order.order_number}.`,
-            html: `<p>Vielen Dank für Ihre Anfrage <strong>${order.order_number}</strong>.</p>`
+            subject: `Anfragebestätigung ${order.order_number}`,
+            text: emailTemplate.text,
+            html: emailTemplate.html,
+            attachments
           });
         } catch (mailErr) {
           console.error('Mail error for order ' + order.id, mailErr);