feat(back-end): bill and qr

backend/build.gradle

@@ -25,13 +25,21 @@ repositories {
 dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-web'
 	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+	implementation 'xyz.capybara:clamav-client:2.1.2'
 	runtimeOnly 'org.postgresql:postgresql'
 	developmentOnly 'org.springframework.boot:spring-boot-devtools'
 	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+	testRuntimeOnly 'com.h2database:h2'
 	testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
 	compileOnly 'org.projectlombok:lombok'
-	implementation 'xyz.capybara:clamav-client:2.1.2'
 	annotationProcessor 'org.projectlombok:lombok'
+	implementation 'io.github.openhtmltopdf:openhtmltopdf-pdfbox:1.1.37'
+	implementation 'io.github.openhtmltopdf:openhtmltopdf-svg-support:1.1.37'
+	implementation 'org.springframework.boot:spring-boot-starter-thymeleaf'
+	implementation 'net.codecrete.qrbill:qrbill-generator:3.4.0'
+
+
+
 }
 
 tasks.named('test') {

backend/src/main/java/com/printcalculator/controller/OrderController.java

@@ -1,13 +1,17 @@
 package com.printcalculator.controller;
 
+import com.printcalculator.dto.*;
 import com.printcalculator.entity.*;
 import com.printcalculator.repository.*;
+import com.printcalculator.service.InvoicePdfRenderingService;
+import com.printcalculator.service.OrderService;
+import com.printcalculator.service.QrBillService;
+import com.printcalculator.service.StorageService;
 import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
 import org.springframework.transaction.annotation.Transactional;
 import org.springframework.web.bind.annotation.*;
 import org.springframework.web.multipart.MultipartFile;
-import com.fasterxml.jackson.annotation.JsonProperty;
 
 import java.io.IOException;
 import java.math.BigDecimal;
@@ -15,209 +19,61 @@ import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.time.OffsetDateTime;
+import java.time.format.DateTimeFormatter;
 import java.util.List;
 import java.util.UUID;
-import java.util.Optional;
+import java.util.Map;
+import java.util.HashMap;
+import java.util.stream.Collectors;
 
 @RestController
 @RequestMapping("/api/orders")
 public class OrderController {
 
+    private final OrderService orderService;
     private final OrderRepository orderRepo;
     private final OrderItemRepository orderItemRepo;
     private final QuoteSessionRepository quoteSessionRepo;
     private final QuoteLineItemRepository quoteLineItemRepo;
     private final CustomerRepository customerRepo;
-    private final com.printcalculator.service.ClamAVService clamAVService;
+    private final StorageService storageService;
+    private final InvoicePdfRenderingService invoiceService;
+    private final QrBillService qrBillService;
 
-    // TODO: Inject Storage Service or use a base path property
-    private static final String STORAGE_ROOT = "storage_orders"; 
 
-    public OrderController(OrderRepository orderRepo,
+    public OrderController(OrderService orderService,
+                           OrderRepository orderRepo,
                            OrderItemRepository orderItemRepo,
                            QuoteSessionRepository quoteSessionRepo,
                            QuoteLineItemRepository quoteLineItemRepo,
                            CustomerRepository customerRepo,
-                           com.printcalculator.service.ClamAVService clamAVService) {
+                           StorageService storageService,
+                           InvoicePdfRenderingService invoiceService,
+                           QrBillService qrBillService) {
+        this.orderService = orderService;
         this.orderRepo = orderRepo;
         this.orderItemRepo = orderItemRepo;
         this.quoteSessionRepo = quoteSessionRepo;
         this.quoteLineItemRepo = quoteLineItemRepo;
         this.customerRepo = customerRepo;
-        this.clamAVService = clamAVService;
+        this.storageService = storageService;
+        this.invoiceService = invoiceService;
+        this.qrBillService = qrBillService;
     }
 
 
     // 1. Create Order from Quote
     @PostMapping("/from-quote/{quoteSessionId}")
     @Transactional
-    public ResponseEntity<Order> createOrderFromQuote(
+    public ResponseEntity<OrderDto> createOrderFromQuote(
             @PathVariable UUID quoteSessionId,
             @RequestBody com.printcalculator.dto.CreateOrderRequest request
     ) {
-        // 1. Fetch Quote Session
-        QuoteSession session = quoteSessionRepo.findById(quoteSessionId)
-                .orElseThrow(() -> new RuntimeException("Quote Session not found"));
-
-        if (!"ACTIVE".equals(session.getStatus())) {
-             // Allow converting only active sessions? Or check if not already converted?
-             // checking convertedOrderId might be better
-        }
-        if (session.getConvertedOrderId() != null) {
-            return ResponseEntity.badRequest().body(null); // Already converted
+        Order order = orderService.createOrderFromQuote(quoteSessionId, request);
+        List<OrderItem> items = orderItemRepo.findByOrder_Id(order.getId());
+        return ResponseEntity.ok(convertToDto(order, items));
     }
     
-        // 2. Handle Customer (Find or Create)
-        Customer customer = customerRepo.findByEmail(request.getCustomer().getEmail())
-                .orElseGet(() -> {
-                    Customer newC = new Customer();
-                    newC.setEmail(request.getCustomer().getEmail());
-                    newC.setCreatedAt(OffsetDateTime.now());
-                    return customerRepo.save(newC);
-                });
-        // Update customer details?
-        customer.setPhone(request.getCustomer().getPhone());
-        customer.setCustomerType(request.getCustomer().getCustomerType());
-        customer.setUpdatedAt(OffsetDateTime.now());
-        customerRepo.save(customer);
-
-        // 3. Create Order
-        Order order = new Order();
-        order.setSourceQuoteSession(session);
-        order.setCustomer(customer);
-        order.setCustomerEmail(request.getCustomer().getEmail());
-        order.setCustomerPhone(request.getCustomer().getPhone());
-        order.setStatus("PENDING_PAYMENT");
-        order.setCreatedAt(OffsetDateTime.now());
-        order.setUpdatedAt(OffsetDateTime.now());
-        order.setCurrency("CHF");
-        // Initialize all NOT NULL monetary fields before first persist.
-        order.setSetupCostChf(session.getSetupCostChf() != null ? session.getSetupCostChf() : BigDecimal.ZERO);
-        order.setShippingCostChf(BigDecimal.ZERO);
-        order.setDiscountChf(BigDecimal.ZERO);
-        order.setSubtotalChf(BigDecimal.ZERO);
-        order.setTotalChf(BigDecimal.ZERO);
-
-        // Billing
-        order.setBillingCustomerType(request.getCustomer().getCustomerType());
-        if (request.getBillingAddress() != null) {
-            order.setBillingFirstName(request.getBillingAddress().getFirstName());
-            order.setBillingLastName(request.getBillingAddress().getLastName());
-            order.setBillingCompanyName(request.getBillingAddress().getCompanyName());
-            order.setBillingContactPerson(request.getBillingAddress().getContactPerson());
-            order.setBillingAddressLine1(request.getBillingAddress().getAddressLine1());
-            order.setBillingAddressLine2(request.getBillingAddress().getAddressLine2());
-            order.setBillingZip(request.getBillingAddress().getZip());
-            order.setBillingCity(request.getBillingAddress().getCity());
-            order.setBillingCountryCode(request.getBillingAddress().getCountryCode() != null ? request.getBillingAddress().getCountryCode() : "CH");
-        }
-
-        // Shipping
-        order.setShippingSameAsBilling(request.isShippingSameAsBilling());
-        if (!request.isShippingSameAsBilling() && request.getShippingAddress() != null) {
-             order.setShippingFirstName(request.getShippingAddress().getFirstName());
-             order.setShippingLastName(request.getShippingAddress().getLastName());
-             order.setShippingCompanyName(request.getShippingAddress().getCompanyName());
-             order.setShippingContactPerson(request.getShippingAddress().getContactPerson());
-             order.setShippingAddressLine1(request.getShippingAddress().getAddressLine1());
-             order.setShippingAddressLine2(request.getShippingAddress().getAddressLine2());
-             order.setShippingZip(request.getShippingAddress().getZip());
-             order.setShippingCity(request.getShippingAddress().getCity());
-             order.setShippingCountryCode(request.getShippingAddress().getCountryCode() != null ? request.getShippingAddress().getCountryCode() : "CH");
-        } else {
-            // Copy billing to shipping? Or leave empty and rely on flag?
-            // Usually explicit copy is safer for queries
-            order.setShippingFirstName(order.getBillingFirstName());
-            order.setShippingLastName(order.getBillingLastName());
-            order.setShippingCompanyName(order.getBillingCompanyName());
-            order.setShippingContactPerson(order.getBillingContactPerson());
-            order.setShippingAddressLine1(order.getBillingAddressLine1());
-            order.setShippingAddressLine2(order.getBillingAddressLine2());
-            order.setShippingZip(order.getBillingZip());
-            order.setShippingCity(order.getBillingCity());
-            order.setShippingCountryCode(order.getBillingCountryCode());
-        }
-
-        // Financials from Session (Assuming mocked/calculated in session)
-        // We re-calculate totals from line items to be safe
-        List<QuoteLineItem> quoteItems = quoteLineItemRepo.findByQuoteSessionId(quoteSessionId);
-        
-        BigDecimal subtotal = BigDecimal.ZERO;
-        
-        // Save Order first to get ID
-        order = orderRepo.save(order);
-
-        // 4. Create Order Items
-        for (QuoteLineItem qItem : quoteItems) {
-            OrderItem oItem = new OrderItem();
-            oItem.setOrder(order);
-            oItem.setOriginalFilename(qItem.getOriginalFilename());
-            oItem.setQuantity(qItem.getQuantity());
-            oItem.setColorCode(qItem.getColorCode());
-            oItem.setMaterialCode(session.getMaterialCode()); // Or per item if supported
-            
-            // Pricing
-            oItem.setUnitPriceChf(qItem.getUnitPriceChf());
-            oItem.setLineTotalChf(qItem.getUnitPriceChf().multiply(BigDecimal.valueOf(qItem.getQuantity())));
-            oItem.setPrintTimeSeconds(qItem.getPrintTimeSeconds());
-            oItem.setMaterialGrams(qItem.getMaterialGrams());
-            
-            // File Handling Check
-            // "orders/{orderId}/3d-files/{orderItemId}/{uuid}.{ext}"
-            UUID fileUuid = UUID.randomUUID();
-            String ext = getExtension(qItem.getOriginalFilename());
-            String storedFilename = fileUuid.toString() + "." + ext;
-            
-            oItem.setStoredFilename(storedFilename);
-            oItem.setStoredRelativePath("PENDING"); // Placeholder
-            oItem.setMimeType("application/octet-stream"); // specific type if known
-            
-            oItem = orderItemRepo.save(oItem);
-            
-            // Update Path now that we have ID
-            String relativePath = "orders/" + order.getId() + "/3d-files/" + oItem.getId() + "/" + storedFilename;
-            oItem.setStoredRelativePath(relativePath);
-            
-            // COPY FILE from Quote to Order
-            if (qItem.getStoredPath() != null) {
-                try {
-                    Path sourcePath = Paths.get(qItem.getStoredPath());
-                    if (Files.exists(sourcePath)) {
-                        Path targetPath = Paths.get(STORAGE_ROOT, relativePath);
-                        Files.createDirectories(targetPath.getParent());
-                        Files.copy(sourcePath, targetPath, java.nio.file.StandardCopyOption.REPLACE_EXISTING);
-                        
-                        oItem.setFileSizeBytes(Files.size(targetPath));
-                    }
-                } catch (IOException e) {
-                    e.printStackTrace(); // Log error but allow order creation? Or fail?
-                    // Ideally fail or mark as error
-                }
-            }
-            
-            orderItemRepo.save(oItem);
-            
-            subtotal = subtotal.add(oItem.getLineTotalChf());
-        }
-
-        // Update Order Totals
-        order.setSubtotalChf(subtotal);
-        order.setSetupCostChf(session.getSetupCostChf() != null ? session.getSetupCostChf() : BigDecimal.ZERO);
-        order.setShippingCostChf(BigDecimal.valueOf(9.00)); // Default shipping? or 0?
-        // TODO: Calc implementation for shipping
-        
-        BigDecimal total = subtotal.add(order.getSetupCostChf()).add(order.getShippingCostChf()).subtract(order.getDiscountChf() != null ? order.getDiscountChf() : BigDecimal.ZERO);
-        order.setTotalChf(total);
-        
-        // Link session
-        session.setConvertedOrderId(order.getId());
-        session.setStatus("CONVERTED"); // or CLOSED
-        quoteSessionRepo.save(session);
-        
-        return ResponseEntity.ok(orderRepo.save(order));
-    }
-    
-    // 2. Upload file for Order Item
     @PostMapping(value = "/{orderId}/items/{orderItemId}/file", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
     @Transactional
     public ResponseEntity<Void> uploadOrderItemFile(
@@ -233,42 +89,103 @@ public class OrderController {
             return ResponseEntity.badRequest().build();
         }
         
-        // Scan for virus
-        clamAVService.scan(file.getInputStream());
-        
-        // Ensure path logic
         String relativePath = item.getStoredRelativePath();
         if (relativePath == null || relativePath.equals("PENDING")) {
-             // Should verify consistency
-             // If we used the logic above, it should have a path.
-             // If it's "PENDING", regen it.
              String ext = getExtension(file.getOriginalFilename());
              String storedFilename = UUID.randomUUID().toString() + "." + ext;
              relativePath = "orders/" + orderId + "/3d-files/" + orderItemId + "/" + storedFilename;
              item.setStoredRelativePath(relativePath);
              item.setStoredFilename(storedFilename);
-             // Update item
         }
         
-        // Save file to disk
-        Path absolutePath = Paths.get(STORAGE_ROOT, relativePath);
-        Files.createDirectories(absolutePath.getParent());
-        
-        if (Files.exists(absolutePath)) {
-            Files.delete(absolutePath); // Overwrite?
-        }
-        
-        Files.copy(file.getInputStream(), absolutePath);
-        
+        storageService.store(file, Paths.get(relativePath));
         item.setFileSizeBytes(file.getSize());
         item.setMimeType(file.getContentType());
-        // Calculate SHA256? (Optional)
-        
         orderItemRepo.save(item);
         
         return ResponseEntity.ok().build();
     }
 
+    @GetMapping("/{orderId}")
+    public ResponseEntity<OrderDto> getOrder(@PathVariable UUID orderId) {
+        return orderRepo.findById(orderId)
+                .map(o -> {
+                    List<OrderItem> items = orderItemRepo.findByOrder_Id(o.getId());
+                    return ResponseEntity.ok(convertToDto(o, items));
+                })
+                .orElse(ResponseEntity.notFound().build());
+    }
+
+    @GetMapping("/{orderId}/invoice")
+    public ResponseEntity<byte[]> getInvoice(@PathVariable UUID orderId) {
+        Order order = orderRepo.findById(orderId)
+                .orElseThrow(() -> new RuntimeException("Order not found"));
+
+        List<OrderItem> items = orderItemRepo.findByOrder_Id(orderId);
+
+        Map<String, Object> vars = new HashMap<>();
+        vars.put("sellerDisplayName", "3D Fab Switzerland");
+        vars.put("sellerAddressLine1", "Sede Ticino, Svizzera");
+        vars.put("sellerAddressLine2", "Sede Bienne, Svizzera");
+        vars.put("sellerEmail", "info@3dfab.ch");
+
+        vars.put("invoiceNumber", "INV-" + order.getId().toString().substring(0, 8).toUpperCase());
+        vars.put("invoiceDate", order.getCreatedAt().format(DateTimeFormatter.ISO_LOCAL_DATE));
+        vars.put("dueDate", order.getCreatedAt().plusDays(7).format(DateTimeFormatter.ISO_LOCAL_DATE));
+
+        String buyerName = order.getBillingCustomerType().equals("BUSINESS") 
+            ? order.getBillingCompanyName() 
+            : order.getBillingFirstName() + " " + order.getBillingLastName();
+        vars.put("buyerDisplayName", buyerName);
+        vars.put("buyerAddressLine1", order.getBillingAddressLine1());
+        vars.put("buyerAddressLine2", order.getBillingZip() + " " + order.getBillingCity() + ", " + order.getBillingCountryCode());
+
+        List<Map<String, Object>> invoiceLineItems = items.stream().map(i -> {
+            Map<String, Object> line = new HashMap<>();
+            line.put("description", "Stampa 3D: " + i.getOriginalFilename());
+            line.put("quantity", i.getQuantity());
+            line.put("unitPriceFormatted", String.format("CHF %.2f", i.getUnitPriceChf()));
+            line.put("lineTotalFormatted", String.format("CHF %.2f", i.getLineTotalChf()));
+            return line;
+        }).collect(Collectors.toList());
+
+        Map<String, Object> setupLine = new HashMap<>();
+        setupLine.put("description", "Costo Setup");
+        setupLine.put("quantity", 1);
+        setupLine.put("unitPriceFormatted", String.format("CHF %.2f", order.getSetupCostChf()));
+        setupLine.put("lineTotalFormatted", String.format("CHF %.2f", order.getSetupCostChf()));
+        invoiceLineItems.add(setupLine);
+
+        Map<String, Object> shippingLine = new HashMap<>();
+        shippingLine.put("description", "Spedizione");
+        shippingLine.put("quantity", 1);
+        shippingLine.put("unitPriceFormatted", String.format("CHF %.2f", order.getShippingCostChf()));
+        shippingLine.put("lineTotalFormatted", String.format("CHF %.2f", order.getShippingCostChf()));
+        invoiceLineItems.add(shippingLine);
+
+        vars.put("invoiceLineItems", invoiceLineItems);
+        vars.put("subtotalFormatted", String.format("CHF %.2f", order.getSubtotalChf()));
+        vars.put("grandTotalFormatted", String.format("CHF %.2f", order.getTotalChf()));
+        vars.put("paymentTermsText", "Pagamento entro 7 giorni via Bonifico o TWINT. Grazie.");
+
+        String qrBillSvg = new String(qrBillService.generateQrBillSvg(order), java.nio.charset.StandardCharsets.UTF_8);
+        
+        // Strip XML declaration and DOCTYPE if present, as they validity break the embedding HTML page
+        if (qrBillSvg.contains("<?xml")) {
+            int svgStartIndex = qrBillSvg.indexOf("<svg");
+            if (svgStartIndex != -1) {
+                qrBillSvg = qrBillSvg.substring(svgStartIndex);
+            }
+        }
+        
+        byte[] pdf = invoiceService.generateInvoicePdfBytesFromTemplate(vars, qrBillSvg);
+
+        return ResponseEntity.ok()
+                .header("Content-Disposition", "attachment; filename=\"invoice-" + orderId + ".pdf\"")
+                .contentType(MediaType.APPLICATION_PDF)
+                .body(pdf);
+    }
+    
     private String getExtension(String filename) {
         if (filename == null) return "stl";
         int i = filename.lastIndexOf('.');
@@ -278,4 +195,64 @@ public class OrderController {
         return "stl";
     }
 
+    private OrderDto convertToDto(Order order, List<OrderItem> items) {
+        OrderDto dto = new OrderDto();
+        dto.setId(order.getId());
+        dto.setStatus(order.getStatus());
+        dto.setCustomerEmail(order.getCustomerEmail());
+        dto.setCustomerPhone(order.getCustomerPhone());
+        dto.setBillingCustomerType(order.getBillingCustomerType());
+        dto.setCurrency(order.getCurrency());
+        dto.setSetupCostChf(order.getSetupCostChf());
+        dto.setShippingCostChf(order.getShippingCostChf());
+        dto.setDiscountChf(order.getDiscountChf());
+        dto.setSubtotalChf(order.getSubtotalChf());
+        dto.setTotalChf(order.getTotalChf());
+        dto.setCreatedAt(order.getCreatedAt());
+        dto.setShippingSameAsBilling(order.getShippingSameAsBilling());
+
+        AddressDto billing = new AddressDto();
+        billing.setFirstName(order.getBillingFirstName());
+        billing.setLastName(order.getBillingLastName());
+        billing.setCompanyName(order.getBillingCompanyName());
+        billing.setContactPerson(order.getBillingContactPerson());
+        billing.setAddressLine1(order.getBillingAddressLine1());
+        billing.setAddressLine2(order.getBillingAddressLine2());
+        billing.setZip(order.getBillingZip());
+        billing.setCity(order.getBillingCity());
+        billing.setCountryCode(order.getBillingCountryCode());
+        dto.setBillingAddress(billing);
+
+        if (!order.getShippingSameAsBilling()) {
+            AddressDto shipping = new AddressDto();
+            shipping.setFirstName(order.getShippingFirstName());
+            shipping.setLastName(order.getShippingLastName());
+            shipping.setCompanyName(order.getShippingCompanyName());
+            shipping.setContactPerson(order.getShippingContactPerson());
+            shipping.setAddressLine1(order.getShippingAddressLine1());
+            shipping.setAddressLine2(order.getShippingAddressLine2());
+            shipping.setZip(order.getShippingZip());
+            shipping.setCity(order.getShippingCity());
+            shipping.setCountryCode(order.getShippingCountryCode());
+            dto.setShippingAddress(shipping);
+        }
+
+        List<OrderItemDto> itemDtos = items.stream().map(i -> {
+            OrderItemDto idto = new OrderItemDto();
+            idto.setId(i.getId());
+            idto.setOriginalFilename(i.getOriginalFilename());
+            idto.setMaterialCode(i.getMaterialCode());
+            idto.setColorCode(i.getColorCode());
+            idto.setQuantity(i.getQuantity());
+            idto.setPrintTimeSeconds(i.getPrintTimeSeconds());
+            idto.setMaterialGrams(i.getMaterialGrams());
+            idto.setUnitPriceChf(i.getUnitPriceChf());
+            idto.setLineTotalChf(i.getLineTotalChf());
+            return idto;
+        }).collect(Collectors.toList());
+        dto.setItems(itemDtos);
+
+        return dto;
+    }
+
 }

backend/src/main/java/com/printcalculator/dto/OrderDto.java

@@ -0,0 +1,74 @@
+package com.printcalculator.dto;
+
+import java.math.BigDecimal;
+import java.time.OffsetDateTime;
+import java.util.List;
+import java.util.UUID;
+
+public class OrderDto {
+    private UUID id;
+    private String status;
+    private String customerEmail;
+    private String customerPhone;
+    private String billingCustomerType;
+    private AddressDto billingAddress;
+    private AddressDto shippingAddress;
+    private Boolean shippingSameAsBilling;
+    private String currency;
+    private BigDecimal setupCostChf;
+    private BigDecimal shippingCostChf;
+    private BigDecimal discountChf;
+    private BigDecimal subtotalChf;
+    private BigDecimal totalChf;
+    private OffsetDateTime createdAt;
+    private List<OrderItemDto> items;
+
+    // Getters and Setters
+    public UUID getId() { return id; }
+    public void setId(UUID id) { this.id = id; }
+
+    public String getStatus() { return status; }
+    public void setStatus(String status) { this.status = status; }
+
+    public String getCustomerEmail() { return customerEmail; }
+    public void setCustomerEmail(String customerEmail) { this.customerEmail = customerEmail; }
+
+    public String getCustomerPhone() { return customerPhone; }
+    public void setCustomerPhone(String customerPhone) { this.customerPhone = customerPhone; }
+
+    public String getBillingCustomerType() { return billingCustomerType; }
+    public void setBillingCustomerType(String billingCustomerType) { this.billingCustomerType = billingCustomerType; }
+
+    public AddressDto getBillingAddress() { return billingAddress; }
+    public void setBillingAddress(AddressDto billingAddress) { this.billingAddress = billingAddress; }
+
+    public AddressDto getShippingAddress() { return shippingAddress; }
+    public void setShippingAddress(AddressDto shippingAddress) { this.shippingAddress = shippingAddress; }
+
+    public Boolean getShippingSameAsBilling() { return shippingSameAsBilling; }
+    public void setShippingSameAsBilling(Boolean shippingSameAsBilling) { this.shippingSameAsBilling = shippingSameAsBilling; }
+
+    public String getCurrency() { return currency; }
+    public void setCurrency(String currency) { this.currency = currency; }
+
+    public BigDecimal getSetupCostChf() { return setupCostChf; }
+    public void setSetupCostChf(BigDecimal setupCostChf) { this.setupCostChf = setupCostChf; }
+
+    public BigDecimal getShippingCostChf() { return shippingCostChf; }
+    public void setShippingCostChf(BigDecimal shippingCostChf) { this.shippingCostChf = shippingCostChf; }
+
+    public BigDecimal getDiscountChf() { return discountChf; }
+    public void setDiscountChf(BigDecimal discountChf) { this.discountChf = discountChf; }
+
+    public BigDecimal getSubtotalChf() { return subtotalChf; }
+    public void setSubtotalChf(BigDecimal subtotalChf) { this.subtotalChf = subtotalChf; }
+
+    public BigDecimal getTotalChf() { return totalChf; }
+    public void setTotalChf(BigDecimal totalChf) { this.totalChf = totalChf; }
+
+    public OffsetDateTime getCreatedAt() { return createdAt; }
+    public void setCreatedAt(OffsetDateTime createdAt) { this.createdAt = createdAt; }
+
+    public List<OrderItemDto> getItems() { return items; }
+    public void setItems(List<OrderItemDto> items) { this.items = items; }
+}

backend/src/main/java/com/printcalculator/dto/OrderItemDto.java

@@ -0,0 +1,44 @@
+package com.printcalculator.dto;
+
+import java.math.BigDecimal;
+import java.util.UUID;
+
+public class OrderItemDto {
+    private UUID id;
+    private String originalFilename;
+    private String materialCode;
+    private String colorCode;
+    private Integer quantity;
+    private Integer printTimeSeconds;
+    private BigDecimal materialGrams;
+    private BigDecimal unitPriceChf;
+    private BigDecimal lineTotalChf;
+
+    // Getters and Setters
+    public UUID getId() { return id; }
+    public void setId(UUID id) { this.id = id; }
+
+    public String getOriginalFilename() { return originalFilename; }
+    public void setOriginalFilename(String originalFilename) { this.originalFilename = originalFilename; }
+
+    public String getMaterialCode() { return materialCode; }
+    public void setMaterialCode(String materialCode) { this.materialCode = materialCode; }
+
+    public String getColorCode() { return colorCode; }
+    public void setColorCode(String colorCode) { this.colorCode = colorCode; }
+
+    public Integer getQuantity() { return quantity; }
+    public void setQuantity(Integer quantity) { this.quantity = quantity; }
+
+    public Integer getPrintTimeSeconds() { return printTimeSeconds; }
+    public void setPrintTimeSeconds(Integer printTimeSeconds) { this.printTimeSeconds = printTimeSeconds; }
+
+    public BigDecimal getMaterialGrams() { return materialGrams; }
+    public void setMaterialGrams(BigDecimal materialGrams) { this.materialGrams = materialGrams; }
+
+    public BigDecimal getUnitPriceChf() { return unitPriceChf; }
+    public void setUnitPriceChf(BigDecimal unitPriceChf) { this.unitPriceChf = unitPriceChf; }
+
+    public BigDecimal getLineTotalChf() { return lineTotalChf; }
+    public void setLineTotalChf(BigDecimal lineTotalChf) { this.lineTotalChf = lineTotalChf; }
+}

backend/src/main/java/com/printcalculator/exception/StorageException.java

@@ -0,0 +1,12 @@
+package com.printcalculator.exception;
+
+public class StorageException extends RuntimeException {
+
+    public StorageException(String message) {
+        super(message);
+    }
+
+    public StorageException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}

backend/src/main/java/com/printcalculator/repository/OrderItemRepository.java

@@ -3,7 +3,9 @@ package com.printcalculator.repository;
 import com.printcalculator.entity.OrderItem;
 import org.springframework.data.jpa.repository.JpaRepository;
 
+import java.util.List;
 import java.util.UUID;
 
 public interface OrderItemRepository extends JpaRepository<OrderItem, UUID> {
+    List<OrderItem> findByOrder_Id(UUID orderId);
 }

backend/src/main/java/com/printcalculator/service/FileSystemStorageService.java

@@ -0,0 +1,94 @@
+package com.printcalculator.service;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.core.io.Resource;
+import org.springframework.core.io.UrlResource;
+import org.springframework.stereotype.Service;
+import org.springframework.web.multipart.MultipartFile;
+import com.printcalculator.exception.StorageException;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.MalformedURLException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.StandardCopyOption;
+
+@Service
+public class FileSystemStorageService implements StorageService {
+
+    private final Path rootLocation;
+    private final ClamAVService clamAVService;
+
+    public FileSystemStorageService(@Value("${storage.location:storage_orders}") String storageLocation, ClamAVService clamAVService) {
+        this.rootLocation = Paths.get(storageLocation);
+        this.clamAVService = clamAVService;
+    }
+
+    @Override
+    public void init() {
+        try {
+            Files.createDirectories(rootLocation);
+        } catch (IOException e) {
+            throw new StorageException("Could not initialize storage", e);
+        }
+    }
+
+    @Override
+    public void store(MultipartFile file, Path destinationRelativePath) throws IOException {
+        Path destinationFile = this.rootLocation.resolve(destinationRelativePath).normalize().toAbsolutePath();
+        if (!destinationFile.getParent().startsWith(this.rootLocation.toAbsolutePath())) {
+            throw new StorageException("Cannot store file outside current directory.");
+        }
+
+        // 1. Salva prima il file su disco per evitare problemi di stream con file grandi
+        Files.createDirectories(destinationFile.getParent());
+        file.transferTo(destinationFile.toFile());
+
+        // 2. Scansiona il file appena salvato aprendo un nuovo stream
+        try (InputStream inputStream = new FileInputStream(destinationFile.toFile())) {
+            if (!clamAVService.scan(inputStream)) {
+                // Se infetto, cancella il file e solleva eccezione
+                Files.deleteIfExists(destinationFile);
+                throw new StorageException("File rejected by antivirus scanner.");
+            }
+        } catch (Exception e) {
+            if (e instanceof StorageException) throw e;
+            // Se l'antivirus fallisce per motivi tecnici, lasciamo il file (fail-open come concordato)
+        }
+    }
+
+    @Override
+    public void store(Path source, Path destinationRelativePath) throws IOException {
+        Path destinationFile = this.rootLocation.resolve(destinationRelativePath).normalize().toAbsolutePath();
+        if (!destinationFile.getParent().startsWith(this.rootLocation.toAbsolutePath())) {
+             throw new StorageException("Cannot store file outside current directory.");
+        }
+        Files.createDirectories(destinationFile.getParent());
+        Files.copy(source, destinationFile, StandardCopyOption.REPLACE_EXISTING);
+    }
+
+    @Override
+    public void delete(Path path) throws IOException {
+        Path file = rootLocation.resolve(path);
+        Files.deleteIfExists(file);
+    }
+
+    @Override
+    public Resource loadAsResource(Path path) throws IOException {
+        try {
+            Path file = rootLocation.resolve(path);
+            Resource resource = new UrlResource(file.toUri());
+            if (resource.exists() || resource.isReadable()) {
+                return resource;
+            } else {
+                throw new RuntimeException("Could not read file: " + path);
+            }
+        } catch (MalformedURLException e) {
+            throw new RuntimeException("Could not read file: " + path, e);
+        }
+    }
+}

backend/src/main/java/com/printcalculator/service/InvoicePdfRenderingService.java

@@ -0,0 +1,48 @@
+package com.printcalculator.service;
+
+import com.openhtmltopdf.pdfboxout.PdfRendererBuilder;
+import com.openhtmltopdf.svgsupport.BatikSVGDrawer;
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.stereotype.Service;
+import org.thymeleaf.TemplateEngine;
+import org.thymeleaf.context.Context;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.util.Locale;
+import java.util.Map;
+
+@Service
+public class InvoicePdfRenderingService {
+
+    private final TemplateEngine thymeleafTemplateEngine;
+
+    public InvoicePdfRenderingService(TemplateEngine thymeleafTemplateEngine) {
+        this.thymeleafTemplateEngine = thymeleafTemplateEngine;
+    }
+
+    public byte[] generateInvoicePdfBytesFromTemplate(Map<String, Object> invoiceTemplateVariables, String qrBillSvg) {
+        try {
+            Context thymeleafContextWithInvoiceData = new Context(Locale.ITALY);
+            thymeleafContextWithInvoiceData.setVariables(invoiceTemplateVariables);
+            thymeleafContextWithInvoiceData.setVariable("qrBillSvg", qrBillSvg);
+
+            String renderedInvoiceHtml = thymeleafTemplateEngine.process("invoice", thymeleafContextWithInvoiceData);
+
+            String classpathBaseUrlForHtmlResources = new ClassPathResource("templates/").getURL().toExternalForm();
+
+            ByteArrayOutputStream generatedPdfByteArrayOutputStream = new ByteArrayOutputStream();
+
+            PdfRendererBuilder openHtmlToPdfRendererBuilder = new PdfRendererBuilder();
+            openHtmlToPdfRendererBuilder.useFastMode();
+            openHtmlToPdfRendererBuilder.useSVGDrawer(new BatikSVGDrawer());
+            openHtmlToPdfRendererBuilder.withHtmlContent(renderedInvoiceHtml, classpathBaseUrlForHtmlResources);
+            openHtmlToPdfRendererBuilder.toStream(generatedPdfByteArrayOutputStream);
+            openHtmlToPdfRendererBuilder.run();
+
+            return generatedPdfByteArrayOutputStream.toByteArray();
+        } catch (Exception pdfGenerationException) {
+            throw new IllegalStateException("PDF invoice generation failed", pdfGenerationException);
+        }
+    }
+}

backend/src/main/java/com/printcalculator/service/OrderService.java

@@ -0,0 +1,300 @@
+package com.printcalculator.service;
+
+import com.printcalculator.dto.AddressDto;
+import com.printcalculator.dto.CreateOrderRequest;
+import com.printcalculator.entity.*;
+import com.printcalculator.repository.CustomerRepository;
+import com.printcalculator.repository.OrderItemRepository;
+import com.printcalculator.repository.OrderRepository;
+import com.printcalculator.repository.QuoteLineItemRepository;
+import com.printcalculator.repository.QuoteSessionRepository;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.time.OffsetDateTime;
+import java.time.format.DateTimeFormatter;
+import java.util.*;
+import java.util.stream.Collectors;
+
+@Service
+public class OrderService {
+
+    private final OrderRepository orderRepo;
+    private final OrderItemRepository orderItemRepo;
+    private final QuoteSessionRepository quoteSessionRepo;
+    private final QuoteLineItemRepository quoteLineItemRepo;
+    private final CustomerRepository customerRepo;
+    private final StorageService storageService;
+    private final InvoicePdfRenderingService invoiceService;
+    private final QrBillService qrBillService;
+
+    public OrderService(OrderRepository orderRepo,
+                        OrderItemRepository orderItemRepo,
+                        QuoteSessionRepository quoteSessionRepo,
+                        QuoteLineItemRepository quoteLineItemRepo,
+                        CustomerRepository customerRepo,
+                        StorageService storageService,
+                        InvoicePdfRenderingService invoiceService,
+                        QrBillService qrBillService) {
+        this.orderRepo = orderRepo;
+        this.orderItemRepo = orderItemRepo;
+        this.quoteSessionRepo = quoteSessionRepo;
+        this.quoteLineItemRepo = quoteLineItemRepo;
+        this.customerRepo = customerRepo;
+        this.storageService = storageService;
+        this.invoiceService = invoiceService;
+        this.qrBillService = qrBillService;
+    }
+
+    @Transactional
+    public Order createOrderFromQuote(UUID quoteSessionId, CreateOrderRequest request) {
+        QuoteSession session = quoteSessionRepo.findById(quoteSessionId)
+                .orElseThrow(() -> new RuntimeException("Quote Session not found"));
+
+        if (session.getConvertedOrderId() != null) {
+            throw new IllegalStateException("Quote session already converted to order");
+        }
+
+        Customer customer = customerRepo.findByEmail(request.getCustomer().getEmail())
+                .orElseGet(() -> {
+                    Customer newC = new Customer();
+                    newC.setEmail(request.getCustomer().getEmail());
+                    newC.setCustomerType(request.getCustomer().getCustomerType());
+                    newC.setCreatedAt(OffsetDateTime.now());
+                    newC.setUpdatedAt(OffsetDateTime.now());
+                    return customerRepo.save(newC);
+                });
+
+        customer.setPhone(request.getCustomer().getPhone());
+        customer.setCustomerType(request.getCustomer().getCustomerType());
+        customer.setUpdatedAt(OffsetDateTime.now());
+        customerRepo.save(customer);
+
+        Order order = new Order();
+        order.setSourceQuoteSession(session);
+        order.setCustomer(customer);
+        order.setCustomerEmail(request.getCustomer().getEmail());
+        order.setCustomerPhone(request.getCustomer().getPhone());
+        order.setStatus("PENDING_PAYMENT");
+        order.setCreatedAt(OffsetDateTime.now());
+        order.setUpdatedAt(OffsetDateTime.now());
+        order.setCurrency("CHF");
+
+        order.setBillingCustomerType(request.getCustomer().getCustomerType());
+        if (request.getBillingAddress() != null) {
+            order.setBillingFirstName(request.getBillingAddress().getFirstName());
+            order.setBillingLastName(request.getBillingAddress().getLastName());
+            order.setBillingCompanyName(request.getBillingAddress().getCompanyName());
+            order.setBillingContactPerson(request.getBillingAddress().getContactPerson());
+            order.setBillingAddressLine1(request.getBillingAddress().getAddressLine1());
+            order.setBillingAddressLine2(request.getBillingAddress().getAddressLine2());
+            order.setBillingZip(request.getBillingAddress().getZip());
+            order.setBillingCity(request.getBillingAddress().getCity());
+            order.setBillingCountryCode(request.getBillingAddress().getCountryCode() != null ? request.getBillingAddress().getCountryCode() : "CH");
+        }
+
+        order.setShippingSameAsBilling(request.isShippingSameAsBilling());
+        if (!request.isShippingSameAsBilling() && request.getShippingAddress() != null) {
+            order.setShippingFirstName(request.getShippingAddress().getFirstName());
+            order.setShippingLastName(request.getShippingAddress().getLastName());
+            order.setShippingCompanyName(request.getShippingAddress().getCompanyName());
+            order.setShippingContactPerson(request.getShippingAddress().getContactPerson());
+            order.setShippingAddressLine1(request.getShippingAddress().getAddressLine1());
+            order.setShippingAddressLine2(request.getShippingAddress().getAddressLine2());
+            order.setShippingZip(request.getShippingAddress().getZip());
+            order.setShippingCity(request.getShippingAddress().getCity());
+            order.setShippingCountryCode(request.getShippingAddress().getCountryCode() != null ? request.getShippingAddress().getCountryCode() : "CH");
+        } else {
+            order.setShippingFirstName(order.getBillingFirstName());
+            order.setShippingLastName(order.getBillingLastName());
+            order.setShippingCompanyName(order.getBillingCompanyName());
+            order.setShippingContactPerson(order.getBillingContactPerson());
+            order.setShippingAddressLine1(order.getBillingAddressLine1());
+            order.setShippingAddressLine2(order.getBillingAddressLine2());
+            order.setShippingZip(order.getBillingZip());
+            order.setShippingCity(order.getBillingCity());
+            order.setShippingCountryCode(order.getBillingCountryCode());
+        }
+
+        List<QuoteLineItem> quoteItems = quoteLineItemRepo.findByQuoteSessionId(quoteSessionId);
+
+        BigDecimal subtotal = BigDecimal.ZERO;
+        order.setSubtotalChf(BigDecimal.ZERO);
+        order.setTotalChf(BigDecimal.ZERO);
+        order.setDiscountChf(BigDecimal.ZERO);
+        order.setSetupCostChf(session.getSetupCostChf() != null ? session.getSetupCostChf() : BigDecimal.ZERO);
+        order.setShippingCostChf(BigDecimal.valueOf(9.00));
+
+        order = orderRepo.save(order);
+
+        List<OrderItem> savedItems = new ArrayList<>();
+
+        for (QuoteLineItem qItem : quoteItems) {
+            OrderItem oItem = new OrderItem();
+            oItem.setOrder(order);
+            oItem.setOriginalFilename(qItem.getOriginalFilename());
+            oItem.setQuantity(qItem.getQuantity());
+            oItem.setColorCode(qItem.getColorCode());
+            oItem.setMaterialCode(session.getMaterialCode());
+
+            oItem.setUnitPriceChf(qItem.getUnitPriceChf());
+            oItem.setLineTotalChf(qItem.getUnitPriceChf().multiply(BigDecimal.valueOf(qItem.getQuantity())));
+            oItem.setPrintTimeSeconds(qItem.getPrintTimeSeconds());
+            oItem.setMaterialGrams(qItem.getMaterialGrams());
+
+            UUID fileUuid = UUID.randomUUID();
+            String ext = getExtension(qItem.getOriginalFilename());
+            String storedFilename = fileUuid.toString() + "." + ext;
+
+            oItem.setStoredFilename(storedFilename);
+            oItem.setStoredRelativePath("PENDING");
+            oItem.setMimeType("application/octet-stream");
+            oItem.setCreatedAt(OffsetDateTime.now());
+
+            oItem = orderItemRepo.save(oItem);
+
+            String relativePath = "orders/" + order.getId() + "/3d-files/" + oItem.getId() + "/" + storedFilename;
+            oItem.setStoredRelativePath(relativePath);
+
+            if (qItem.getStoredPath() != null) {
+                try {
+                    Path sourcePath = Paths.get(qItem.getStoredPath());
+                    if (Files.exists(sourcePath)) {
+                        storageService.store(sourcePath, Paths.get(relativePath));
+                        oItem.setFileSizeBytes(Files.size(sourcePath));
+                    }
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+            }
+
+            oItem = orderItemRepo.save(oItem);
+            savedItems.add(oItem);
+            subtotal = subtotal.add(oItem.getLineTotalChf());
+        }
+
+        order.setSubtotalChf(subtotal);
+        if (order.getShippingCostChf() == null) {
+            order.setShippingCostChf(BigDecimal.valueOf(9.00));
+        }
+
+        BigDecimal total = subtotal.add(order.getSetupCostChf()).add(order.getShippingCostChf()).subtract(order.getDiscountChf() != null ? order.getDiscountChf() : BigDecimal.ZERO);
+        order.setTotalChf(total);
+
+        session.setConvertedOrderId(order.getId());
+        session.setStatus("CONVERTED");
+        quoteSessionRepo.save(session);
+
+        // Generate Invoice and QR Bill
+        generateAndSaveDocuments(order, savedItems);
+
+        return orderRepo.save(order);
+    }
+    
+    private void generateAndSaveDocuments(Order order, List<OrderItem> items) {
+        try {
+            // 1. Generate QR Bill
+            byte[] qrBillSvgBytes = qrBillService.generateQrBillSvg(order);
+            String qrBillSvg = new String(qrBillSvgBytes, StandardCharsets.UTF_8);
+
+            // Strip XML declaration and DOCTYPE if present, as they validity break the embedding HTML page
+            if (qrBillSvg.contains("<?xml")) {
+                int svgStartIndex = qrBillSvg.indexOf("<svg");
+                if (svgStartIndex != -1) {
+                    qrBillSvg = qrBillSvg.substring(svgStartIndex);
+                }
+            }
+            
+            // Save QR Bill SVG
+            String qrRelativePath = "orders/" + order.getId() + "/documents/qr-bill.svg";
+            saveFileBytes(qrBillSvgBytes, qrRelativePath);
+
+            // 2. Prepare Invoice Variables
+            Map<String, Object> vars = new HashMap<>();
+            vars.put("sellerDisplayName", "3D Fab Switzerland");
+            vars.put("sellerAddressLine1", "Sede Ticino, Svizzera");
+            vars.put("sellerAddressLine2", "Sede Bienne, Svizzera");
+            vars.put("sellerEmail", "info@3dfab.ch");
+
+            vars.put("invoiceNumber", "INV-" + order.getId().toString().substring(0, 8).toUpperCase());
+            vars.put("invoiceDate", order.getCreatedAt().format(DateTimeFormatter.ISO_LOCAL_DATE));
+            vars.put("dueDate", order.getCreatedAt().plusDays(7).format(DateTimeFormatter.ISO_LOCAL_DATE));
+
+            String buyerName = "BUSINESS".equals(order.getBillingCustomerType())
+                    ? order.getBillingCompanyName()
+                    : order.getBillingFirstName() + " " + order.getBillingLastName();
+            vars.put("buyerDisplayName", buyerName);
+            vars.put("buyerAddressLine1", order.getBillingAddressLine1());
+            vars.put("buyerAddressLine2", order.getBillingZip() + " " + order.getBillingCity() + ", " + order.getBillingCountryCode());
+
+            List<Map<String, Object>> invoiceLineItems = items.stream().map(i -> {
+                Map<String, Object> line = new HashMap<>();
+                line.put("description", "Stampa 3D: " + i.getOriginalFilename());
+                line.put("quantity", i.getQuantity());
+                line.put("unitPriceFormatted", String.format("CHF %.2f", i.getUnitPriceChf()));
+                line.put("lineTotalFormatted", String.format("CHF %.2f", i.getLineTotalChf()));
+                return line;
+            }).collect(Collectors.toList());
+
+            Map<String, Object> setupLine = new HashMap<>();
+            setupLine.put("description", "Costo Setup");
+            setupLine.put("quantity", 1);
+            setupLine.put("unitPriceFormatted", String.format("CHF %.2f", order.getSetupCostChf()));
+            setupLine.put("lineTotalFormatted", String.format("CHF %.2f", order.getSetupCostChf()));
+            invoiceLineItems.add(setupLine);
+
+            Map<String, Object> shippingLine = new HashMap<>();
+            shippingLine.put("description", "Spedizione");
+            shippingLine.put("quantity", 1);
+            shippingLine.put("unitPriceFormatted", String.format("CHF %.2f", order.getShippingCostChf()));
+            shippingLine.put("lineTotalFormatted", String.format("CHF %.2f", order.getShippingCostChf()));
+            invoiceLineItems.add(shippingLine);
+
+            vars.put("invoiceLineItems", invoiceLineItems);
+            vars.put("subtotalFormatted", String.format("CHF %.2f", order.getSubtotalChf()));
+            vars.put("grandTotalFormatted", String.format("CHF %.2f", order.getTotalChf()));
+            vars.put("paymentTermsText", "Appena riceviamo il pagamento l'ordine entrerà nella coda di stampa. Grazie per la fiducia");
+
+            // 3. Generate PDF
+            byte[] pdfBytes = invoiceService.generateInvoicePdfBytesFromTemplate(vars, qrBillSvg);
+            
+            // Save PDF
+            String pdfRelativePath = "orders/" + order.getId() + "/documents/invoice-" + order.getId() + ".pdf";
+            saveFileBytes(pdfBytes, pdfRelativePath);
+
+        } catch (Exception e) {
+            e.printStackTrace(); 
+            // Don't fail the order if document generation fails, but log it
+            // TODO: Better error handling
+        }
+    }
+
+    private void saveFileBytes(byte[] content, String relativePath) {
+        // Since StorageService takes paths, we might need to write to temp first or check if it supports bytes/streams
+        // Simulating via temp file for now as StorageService.store takes a Path
+        try {
+            Path tempFile = Files.createTempFile("print-calc-upload", ".tmp");
+            Files.write(tempFile, content);
+            storageService.store(tempFile, Paths.get(relativePath));
+            Files.delete(tempFile);
+        } catch (IOException e) {
+             throw new RuntimeException("Failed to save file " + relativePath, e);
+        }
+    }
+
+    private String getExtension(String filename) {
+        if (filename == null) return "stl";
+        int i = filename.lastIndexOf('.');
+        if (i > 0) {
+            return filename.substring(i + 1);
+        }
+        return "stl";
+    }
+}

backend/src/main/java/com/printcalculator/service/QrBillService.java

@@ -0,0 +1,68 @@
+package com.printcalculator.service;
+
+import com.printcalculator.entity.Order;
+import net.codecrete.qrbill.generator.Bill;
+import net.codecrete.qrbill.generator.GraphicsFormat;
+import net.codecrete.qrbill.generator.QRBill;
+import org.springframework.stereotype.Service;
+
+import java.math.BigDecimal;
+
+@Service
+public class QrBillService {
+
+    public byte[] generateQrBillSvg(Order order) {
+        Bill bill = createBillFromOrder(order);
+        return QRBill.generate(bill);
+    }
+    
+    public Bill createBillFromOrder(Order order) {
+        Bill bill = new Bill();
+
+        // Creditor (Merchant)
+        bill.setAccount("CH7409000000154821581"); // TODO: Configurable IBAN
+        bill.setCreditor(createAddress(
+                "Küng, Joe",
+                "Via G. Pioda 29a",
+                "6710",
+                "Biasca",
+                "CH"
+        ));
+
+        // Debtor (Customer)
+        String debtorName;
+        if ("BUSINESS".equals(order.getBillingCustomerType())) {
+            debtorName = order.getBillingCompanyName();
+        } else {
+            debtorName = order.getBillingFirstName() + " " + order.getBillingLastName();
+        }
+        
+        bill.setDebtor(createAddress(
+                debtorName,
+                order.getBillingAddressLine1(), // Assuming simple address for now. Splitting might be needed if street/house number are separate
+                order.getBillingZip(),
+                order.getBillingCity(),
+                order.getBillingCountryCode()
+        ));
+
+        // Amount
+        bill.setAmount(order.getTotalChf());
+        bill.setCurrency("CHF");
+
+        // Reference
+        // bill.setReference(QRBill.createCreditorReference("...")); // If using QRR
+        bill.setUnstructuredMessage("Order " + order.getId());
+
+        return bill;
+    }
+
+    private net.codecrete.qrbill.generator.Address createAddress(String name, String street, String zip, String city, String country) {
+        net.codecrete.qrbill.generator.Address address = new net.codecrete.qrbill.generator.Address();
+        address.setName(name);
+        address.setStreet(street);
+        address.setPostalCode(zip);
+        address.setTown(city);
+        address.setCountryCode(country);
+        return address;
+    }
+}

backend/src/main/java/com/printcalculator/service/StorageService.java

@@ -0,0 +1,14 @@
+package com.printcalculator.service;
+
+import org.springframework.core.io.Resource;
+import org.springframework.web.multipart.MultipartFile;
+import java.nio.file.Path;
+import java.io.IOException;
+
+public interface StorageService {
+    void init();
+    void store(MultipartFile file, Path destination) throws IOException;
+    void store(Path source, Path destination) throws IOException;
+    void delete(Path path) throws IOException;
+    Resource loadAsResource(Path path) throws IOException;
+}

backend/src/main/resources/application.properties

@@ -18,3 +18,8 @@ profiles.root=${PROFILES_DIR:profiles}
 # File Upload Limits
 spring.servlet.multipart.max-file-size=200MB
 spring.servlet.multipart.max-request-size=200MB
+
+# ClamAV Configuration
+clamav.host=${CLAMAV_HOST:clamav}
+clamav.port=${CLAMAV_PORT:3310}
+clamav.enabled=${CLAMAV_ENABLED:false}

backend/src/main/resources/templates/invoice.html

@@ -0,0 +1,249 @@
+<!DOCTYPE html>
+<html lang="it" xmlns:th="http://www.thymeleaf.org">
+<head>
+  <meta charset="utf-8"/>
+  <style>
+    @page invoice { size: 8.5in 11in; margin: 0.65in; }
+    @page qrpage { size: A4; margin: 0; }
+
+    body {
+      page: invoice;
+      font-family: Helvetica, Arial, sans-serif;
+      font-size: 10pt;
+      margin: 0;
+      padding: 0;
+      background: #fff;
+      color: #1a1a1a;
+    }
+
+    .invoice-page {
+      page: invoice;
+      width: 100%;
+    }
+
+    .header-table {
+      width: 100%;
+      border-collapse: collapse;
+      table-layout: fixed;
+    }
+
+    .header-table td {
+      vertical-align: top;
+      padding: 0;
+    }
+
+    .header-left {
+      width: 58%;
+      line-height: 1.35;
+    }
+
+    .header-right {
+      width: 42%;
+      text-align: right;
+      line-height: 1.35;
+    }
+
+    .invoice-title {
+      font-size: 15pt;
+      font-weight: 700;
+      margin: 0 0 4mm 0;
+      letter-spacing: 0.3px;
+    }
+
+    .section-title {
+      margin: 9mm 0 2mm 0;
+      font-size: 10.5pt;
+      font-weight: 700;
+      text-transform: uppercase;
+      letter-spacing: 0.2px;
+    }
+
+    .buyer-box {
+      margin: 0;
+      line-height: 1.4;
+      min-height: 20mm;
+    }
+
+    .line-items {
+      width: 100%;
+      border-collapse: collapse;
+      table-layout: fixed;
+      margin-top: 8mm;
+    }
+
+    .line-items th,
+    .line-items td {
+      border-bottom: 1px solid #d8d8d8;
+      padding: 2.8mm 2.2mm;
+      vertical-align: top;
+      word-break: break-word;
+    }
+
+    .line-items th {
+      text-align: left;
+      font-weight: 700;
+      background: #f7f7f7;
+    }
+
+    .line-items th:nth-child(1),
+    .line-items td:nth-child(1) {
+      width: 54%;
+    }
+
+    .line-items th:nth-child(2),
+    .line-items td:nth-child(2) {
+      width: 12%;
+      text-align: right;
+      white-space: nowrap;
+    }
+
+    .line-items th:nth-child(3),
+    .line-items td:nth-child(3) {
+      width: 17%;
+      text-align: right;
+      white-space: nowrap;
+    }
+
+    .line-items th:nth-child(4),
+    .line-items td:nth-child(4) {
+      width: 17%;
+      text-align: right;
+      white-space: nowrap;
+      font-weight: 600;
+    }
+
+    .totals {
+      margin-top: 7mm;
+      margin-left: auto;
+      width: 76mm;
+      border-collapse: collapse;
+    }
+
+    .totals td {
+      border: none;
+      padding: 1.6mm 0;
+    }
+
+    .totals-label {
+      text-align: left;
+      color: #3a3a3a;
+    }
+
+    .totals-value {
+      text-align: right;
+      white-space: nowrap;
+      font-weight: 600;
+    }
+
+    .total-strong td {
+      font-size: 11pt;
+      font-weight: 700;
+      padding-top: 2.4mm;
+      border-top: 1px solid #d8d8d8;
+    }
+
+    .payment-terms {
+      margin-top: 9mm;
+      line-height: 1.4;
+      color: #2b2b2b;
+    }
+
+    .qr-only-page {
+      page: qrpage;
+      position: relative;
+      width: 210mm;
+      height: 297mm;
+      background: #fff;
+      page-break-before: always;
+      break-before: page;
+    }
+
+    .qr-bill-bottom {
+      position: absolute;
+      left: 0;
+      bottom: 0;
+      width: 210mm;
+      height: 105mm;
+      overflow: hidden;
+      background: #fff;
+    }
+
+    .qr-bill-bottom svg {
+      width: 210mm !important;
+      height: 105mm !important;
+      display: block;
+    }
+  </style>
+</head>
+<body>
+<div class="invoice-page">
+
+<table class="header-table">
+  <tr>
+    <td class="header-left">
+      <div><strong th:text="${sellerDisplayName}">Nome Cognome</strong></div>
+      <div th:text="${sellerAddressLine1}">Via Esempio 12</div>
+      <div th:text="${sellerAddressLine2}">6500 Bellinzona, CH</div>
+      <div th:text="${sellerEmail}">email@example.com</div>
+    </td>
+    <td class="header-right">
+      <div class="invoice-title">Fattura</div>
+      <div>Numero: <span th:text="${invoiceNumber}">2026-000123</span></div>
+      <div>Data: <span th:text="${invoiceDate}">2026-02-13</span></div>
+      <div>Scadenza: <span th:text="${dueDate}">2026-02-20</span></div>
+    </td>
+  </tr>
+</table>
+
+<div class="section-title">Fatturare a</div>
+<div class="buyer-box">
+  <div>
+    <div th:text="${buyerDisplayName}">Cliente SA</div>
+    <div th:text="${buyerAddressLine1}">Via Cliente 7</div>
+    <div th:text="${buyerAddressLine2}">8000 Zürich, CH</div>
+  </div>
+</div>
+
+<table class="line-items">
+  <thead>
+    <tr>
+      <th>Descrizione</th>
+      <th>Qtà</th>
+      <th>Prezzo</th>
+      <th>Totale</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr th:each="lineItem : ${invoiceLineItems}">
+      <td th:text="${lineItem.description}">Stampa 3D pezzo X</td>
+      <td th:text="${lineItem.quantity}">1</td>
+      <td th:text="${lineItem.unitPriceFormatted}">CHF 10.00</td>
+      <td th:text="${lineItem.lineTotalFormatted}">CHF 10.00</td>
+    </tr>
+  </tbody>
+</table>
+
+<table class="totals">
+  <tr>
+    <td class="totals-label">Subtotale</td>
+    <td class="totals-value" th:text="${subtotalFormatted}">CHF 10.00</td>
+  </tr>
+  <tr class="total-strong">
+    <td class="totals-label">Totale</td>
+    <td class="totals-value" th:text="${grandTotalFormatted}">CHF 10.00</td>
+  </tr>
+</table>
+
+<div class="payment-terms" th:text="${paymentTermsText}">
+  Pagamento entro 7 giorni. Grazie.
+</div>
+
+</div>
+
+<div class="qr-only-page">
+  <div class="qr-bill-bottom" th:utext="${qrBillSvg}">
+  </div>
+</div>
+
+</body>
+</html>

frontend/src/app/features/calculator/services/quote-estimator.service.ts

@@ -145,6 +145,23 @@ export class QuoteEstimatorService {
       return this.http.post(`${environment.apiUrl}/api/orders/from-quote/${sessionId}`, orderDetails, { headers });
   }
 
+  getOrder(orderId: string): Observable<any> {
+      const headers: any = {};
+      // @ts-ignore
+      if (environment.basicAuth) headers['Authorization'] = 'Basic ' + btoa(environment.basicAuth);
+      return this.http.get(`${environment.apiUrl}/api/orders/${orderId}`, { headers });
+  }
+
+  getOrderInvoice(orderId: string): Observable<Blob> {
+      const headers: any = {};
+      // @ts-ignore
+      if (environment.basicAuth) headers['Authorization'] = 'Basic ' + btoa(environment.basicAuth);
+      return this.http.get(`${environment.apiUrl}/api/orders/${orderId}/invoice`, {
+          headers,
+          responseType: 'blob'
+      });
+  }
+  
   calculate(request: QuoteRequest): Observable<number | QuoteResult> {
     console.log('QuoteEstimatorService: Calculating quote...', request);
     if (request.items.length === 0) {

frontend/src/app/features/checkout/checkout.component.html

@@ -1,6 +1,9 @@
 <div class="checkout-page">
-  <h2 class="section-title">{{ 'CHECKOUT.TITLE' | translate }}</h2>
+  <div class="container hero">
+    <h1 class="section-title">{{ 'CHECKOUT.TITLE' | translate }}</h1>
+  </div>
   
+  <div class="container">
     <div class="checkout-layout">
       
       <!-- LEFT COLUMN: Form -->
@@ -13,36 +16,33 @@
         <form [formGroup]="checkoutForm" (ngSubmit)="onSubmit()" *ngIf="!error">
           
           <!-- Contact Info Card -->
-        <div class="form-card">
-          <div class="card-header">
+          <app-card class="mb-6">
+            <div class="card-header-simple">
               <h3>{{ 'CHECKOUT.CONTACT_INFO' | translate }}</h3>
             </div>
-          <div class="card-content">
             <div class="form-row">
               <app-input formControlName="email" type="email" [label]="'CHECKOUT.EMAIL' | translate" [required]="true" [error]="checkoutForm.get('email')?.hasError('email') ? 'Invalid email' : null"></app-input>
               <app-input formControlName="phone" type="tel" [label]="'CHECKOUT.PHONE' | translate" [required]="true"></app-input>
             </div>
-          </div>
-        </div>
+          </app-card>
 
           <!-- Billing Address Card -->
-        <div class="form-card">
-          <div class="card-header">
+          <app-card class="mb-6">
+            <div class="card-header-simple">
               <h3>{{ 'CHECKOUT.BILLING_ADDR' | translate }}</h3>
             </div>
-          <div class="card-content" formGroupName="billingAddress">
-            <div class="form-row">
+            <div formGroupName="billingAddress">
+              
+              <!-- Private Person Fields -->
+              <div *ngIf="!isCompany" class="form-row">
                 <app-input formControlName="firstName" [label]="'CHECKOUT.FIRST_NAME' | translate" [required]="true"></app-input>
                 <app-input formControlName="lastName" [label]="'CHECKOUT.LAST_NAME' | translate" [required]="true"></app-input>
               </div>
 
-            <app-input formControlName="addressLine1" [label]="'CHECKOUT.ADDRESS_1' | translate" [required]="true"></app-input>
-            <app-input formControlName="addressLine2" [label]="'CHECKOUT.ADDRESS_2' | translate"></app-input>
-
-            <div class="form-row three-cols">
-              <app-input formControlName="zip" [label]="'CHECKOUT.ZIP' | translate" [required]="true"></app-input>
-              <app-input formControlName="city" [label]="'CHECKOUT.CITY' | translate" class="city-field" [required]="true"></app-input>
-              <app-input formControlName="countryCode" [label]="'CHECKOUT.COUNTRY' | translate" [disabled]="true" [required]="true"></app-input>
+              <!-- Company Fields -->
+              <div *ngIf="isCompany" class="company-fields mb-4">
+                <app-input formControlName="companyName" [label]="('CONTACT.COMPANY_NAME' | translate) + ' *'" [placeholder]="'CONTACT.PLACEHOLDER_COMPANY' | translate"></app-input>
+                <app-input formControlName="referencePerson" [label]="('CONTACT.REF_PERSON' | translate) + ' *'" [placeholder]="'CONTACT.PLACEHOLDER_REF_PERSON' | translate"></app-input>
               </div>
 
               <!-- User Type Selector -->
@@ -55,13 +55,16 @@
                 </div>
               </div>
               
-            <!-- Company Fields (Indented with left border) -->
-            <div *ngIf="isCompany" class="company-fields">
-              <app-input formControlName="companyName" [label]="('CONTACT.COMPANY_NAME' | translate) + ' *'" [placeholder]="'CONTACT.PLACEHOLDER_COMPANY' | translate"></app-input>
-              <app-input formControlName="referencePerson" [label]="('CONTACT.REF_PERSON' | translate) + ' *'" [placeholder]="'CONTACT.PLACEHOLDER_REF_PERSON' | translate"></app-input>
-            </div>
+              <app-input formControlName="addressLine1" [label]="'CHECKOUT.ADDRESS_1' | translate" [required]="true"></app-input>
+              <app-input formControlName="addressLine2" [label]="'CHECKOUT.ADDRESS_2' | translate"></app-input>
+
+              <div class="form-row three-cols">
+                <app-input formControlName="zip" [label]="'CHECKOUT.ZIP' | translate" [required]="true"></app-input>
+                <app-input formControlName="city" [label]="'CHECKOUT.CITY' | translate" class="city-field" [required]="true"></app-input>
+                <app-input formControlName="countryCode" [label]="'CHECKOUT.COUNTRY' | translate" [disabled]="true" [required]="true"></app-input>
               </div>
             </div>
+          </app-card>
 
           <!-- Shipping Option -->
           <div class="shipping-option">
@@ -73,11 +76,11 @@
           </div>
 
           <!-- Shipping Address Card (Conditional) -->
-        <div class="form-card" *ngIf="!checkoutForm.get('shippingSameAsBilling')?.value">
-           <div class="card-header">
+          <app-card *ngIf="!checkoutForm.get('shippingSameAsBilling')?.value" class="mb-6">
+             <div class="card-header-simple">
               <h3>{{ 'CHECKOUT.SHIPPING_ADDR' | translate }}</h3>
             </div>
-          <div class="card-content" formGroupName="shippingAddress">
+            <div formGroupName="shippingAddress">
                <div class="form-row">
                 <app-input formControlName="firstName" [label]="'CHECKOUT.FIRST_NAME' | translate"></app-input>
                 <app-input formControlName="lastName" [label]="'CHECKOUT.LAST_NAME' | translate"></app-input>
@@ -96,11 +99,11 @@
                 <app-input formControlName="countryCode" [label]="'CHECKOUT.COUNTRY' | translate" [disabled]="true"></app-input>
               </div>
             </div>
-        </div>
+          </app-card>
 
           <div class="actions">
             <app-button type="submit" [disabled]="checkoutForm.invalid || isSubmitting()" [fullWidth]="true">
-            {{ isSubmitting() ? ('CHECKOUT.PROCESSING' | translate) : ('CHECKOUT.PLACE_ORDER' | translate) }}
+              {{ (isSubmitting() ? 'CHECKOUT.PROCESSING' : 'CHECKOUT.PLACE_ORDER') | translate }}
             </app-button>
           </div>
 
@@ -109,12 +112,11 @@
 
       <!-- RIGHT COLUMN: Order Summary -->
       <div class="checkout-summary-section">
-      <div class="form-card sticky-card">
-        <div class="card-header">
+        <app-card class="sticky-card">
+          <div class="card-header-simple">
             <h3>{{ 'CHECKOUT.SUMMARY_TITLE' | translate }}</h3>
           </div>
           
-        <div class="card-content">
           <div class="summary-items" *ngIf="quoteSession() as session">
              <div class="summary-item" *ngFor="let item of session.items">
                <div class="item-details">
@@ -142,15 +144,18 @@
               <span>{{ 'CHECKOUT.SETUP_FEE' | translate }}</span>
               <span>{{ session.session.setupCostChf | currency:'CHF' }}</span>
             </div>
-            <div class="divider"></div>
-            <div class="total-row grand-total">
+            <div class="total-row">
+              <span>{{ 'CHECKOUT.SHIPPING' | translate }}</span>
+              <span>{{ 9.00 | currency:'CHF' }}</span>
+            </div>
+            <div class="grand-total">
               <span>{{ 'CHECKOUT.TOTAL' | translate }}</span>
-              <span>{{ session.grandTotalChf | currency:'CHF' }}</span>
-            </div>
-          </div>
+              <span>{{ (session.grandTotalChf + 9.00) | currency:'CHF' }}</span>
             </div>
           </div>
+        </app-card>
       </div>
 
     </div>
   </div>
+</div>

frontend/src/app/features/checkout/checkout.component.scss

@@ -1,84 +1,76 @@
-.checkout-page {
-  padding: 3rem 1rem;
-  max-width: 1200px;
-  margin: 0 auto;
+.hero { 
+  padding: var(--space-8) 0;
+  text-align: center; 
+
+  .section-title {
+    font-size: 2.5rem;
+    margin-bottom: var(--space-2);
+  }
 }
 
 .checkout-layout {
   display: grid;
-  grid-template-columns: 1fr 380px;
+  grid-template-columns: 1fr 420px;
   gap: var(--space-8);
   align-items: start;
+  margin-bottom: var(--space-12);
 
-  @media (max-width: 900px) {
+  @media (max-width: 1024px) {
     grid-template-columns: 1fr;
-    gap: var(--space-6);
+    gap: var(--space-8);
   }
 }
 
-.section-title {
-  font-size: 2rem;
-  font-weight: 700;
+.card-header-simple {
   margin-bottom: var(--space-6);
-  color: var(--color-heading);
-}
-
-.form-card {
-  margin-bottom: var(--space-6);
-  background: var(--color-bg-surface);
-  border: 1px solid var(--color-border);
-  border-radius: var(--radius-lg);
-  overflow: hidden;
-
-  .card-header {
-    padding: var(--space-4) var(--space-6);
+  padding-bottom: var(--space-4);
   border-bottom: 1px solid var(--color-border);
-    background: var(--color-bg-subtle);
   
   h3 {
-      font-size: 1.1rem;
+    font-size: 1.25rem;
     font-weight: 600;
-      color: var(--color-heading);
+    color: var(--color-text);
     margin: 0;
   }
 }
 
-  .card-content {
-    padding: var(--space-6);
-  }
-}
-
 .form-row {
   display: flex;
+  flex-direction: column;
   gap: var(--space-4);
   margin-bottom: var(--space-4);
   
+  @media(min-width: 768px) {
+    flex-direction: row;
+    & > * { flex: 1; }
+  }
+
+  &.no-margin {
+    margin-bottom: 0;
+  }
+
   &.three-cols {
     display: grid;
-    grid-template-columns: 1fr 2fr 1fr;
+    grid-template-columns: 1.5fr 2fr 1fr;
     gap: var(--space-4);
-  }
     
-  app-input {
-    flex: 1;
-    width: 100%;
-  }
-
-  @media (max-width: 600px) {
-    flex-direction: column;
-    &.three-cols {
+    @media (max-width: 768px) {
       grid-template-columns: 1fr;
     }
   }
+
+  app-input {
+    width: 100%;
+  }
 }
 
-/* User Type Selector Styles - Matched with Contact Form */
+/* User Type Selector - Matching Contact Form Style */
 .user-type-selector {
   display: flex;
   background-color: var(--color-neutral-100);
   border-radius: var(--radius-md);
   padding: 4px;
-  margin-bottom: var(--space-4);
+  margin: var(--space-6) 0;
   gap: 4px;
   width: 100%;
   max-width: 400px;
@@ -112,12 +104,14 @@
   gap: var(--space-4);
   padding-left: var(--space-4);
   border-left: 2px solid var(--color-border);
-  margin-top: var(--space-4);
   margin-bottom: var(--space-4);
 }
 
 .shipping-option {
   margin: var(--space-6) 0;
+  padding: var(--space-4);
+  background: var(--color-neutral-100);
+  border-radius: var(--radius-md);
 }
 
 /* Custom Checkbox */
@@ -125,9 +119,10 @@
   display: flex;
   align-items: center;
   position: relative;
-  padding-left: 30px;
+  padding-left: 36px;
   cursor: pointer;
   font-size: 1rem;
+  font-weight: 500;
   user-select: none;
   color: var(--color-text);
 
@@ -153,10 +148,10 @@
     top: 50%;
     left: 0;
     transform: translateY(-50%);
-    height: 20px;
-    width: 20px;
-    background-color: var(--color-bg-surface);
-    border: 1px solid var(--color-border);
+    height: 24px;
+    width: 24px;
+    background-color: var(--color-bg-card);
+    border: 2px solid var(--color-border);
     border-radius: var(--radius-sm);
     transition: all 0.2s;
 
@@ -164,12 +159,12 @@
       content: "";
       position: absolute;
       display: none;
-      left: 6px;
-      top: 2px;
+      left: 7px;
+      top: 3px;
       width: 6px;
       height: 12px;
-      border: solid white;
-      border-width: 0 2px 2px 0;
+      border: solid #000;
+      border-width: 0 2.5px 2.5px 0;
       transform: rotate(45deg);
     }
   }
@@ -179,40 +174,48 @@
   }
 }
 
-
 .checkout-summary-section {
   position: relative;
 }
 
 .sticky-card {
   position: sticky;
-  top: 0; 
-  /* Inherits styles from .form-card */
+  top: var(--space-6);
 }
 
 .summary-items {
   margin-bottom: var(--space-6);
-  max-height: 400px;
+  max-height: 450px;
   overflow-y: auto;
+  padding-right: var(--space-2);
+  padding-top: var(--space-2);
+
+  &::-webkit-scrollbar {
+    width: 4px;
+  }
+  &::-webkit-scrollbar-thumb {
+    background: var(--color-border);
+    border-radius: 4px;
+  }
 }
 
 .summary-item {
   display: flex;
   justify-content: space-between;
   align-items: flex-start;
-  padding: var(--space-3) 0;
+  padding: var(--space-4) 0;
   border-bottom: 1px solid var(--color-border);
 
-  &:last-child {
-    border-bottom: none;
-  }
+  &:first-child { padding-top: 0; }
+  &:last-child { border-bottom: none; }
 
   .item-details {
     flex: 1;
     
     .item-name {
       display: block;
-      font-weight: 500;
+      font-weight: 600;
+      font-size: 0.95rem;
       margin-bottom: var(--space-1);
       word-break: break-all;
       color: var(--color-text);
@@ -226,8 +229,8 @@
       color: var(--color-text-muted);
       
       .color-dot {
-        width: 12px;
-        height: 12px;
+        width: 14px;
+        height: 14px;
         border-radius: 50%;
         display: inline-block;
         border: 1px solid var(--color-border);
@@ -245,55 +248,52 @@
     font-weight: 600;
     margin-left: var(--space-3);
     white-space: nowrap;
-    color: var(--color-heading);
+    color: var(--color-text);
   }
 }
 
 .summary-totals {
-  padding-top: var(--space-4);
-  border-top: 1px solid var(--color-border);
-  margin-top: var(--space-4);
+  background: var(--color-neutral-100);
+  padding: var(--space-4);
+  border-radius: var(--radius-md);
+  margin-top: var(--space-6);
 
   .total-row {
     display: flex;
     justify-content: space-between;
     margin-bottom: var(--space-2);
-    color: var(--color-text);
     font-size: 0.95rem;
+    color: var(--color-text);
+  }
 
-    &.grand-total {
-      color: var(--color-heading);
+  .grand-total {
+    display: flex;
+    justify-content: space-between;
+    color: var(--color-text);
     font-weight: 700;
-      font-size: 1.25rem;
+    font-size: 1.5rem;
     margin-top: var(--space-4);
     padding-top: var(--space-4);
-      border-top: 1px solid var(--color-border);
-      margin-bottom: 0;
-    }
+    border-top: 2px solid var(--color-border);
   }
 }
 
 .actions {
-  margin-top: var(--space-6);
-  display: flex;
-  justify-content: flex-end;
+  margin-top: var(--space-8);
   
   app-button {
     width: 100%;
-    
-    @media (min-width: 900px) {
-        width: auto;
-        min-width: 200px;
-    }
   }
 }
 
 .error-message {
-  color: var(--color-danger);
-  background: var(--color-danger-subtle);
+  color: var(--color-error);
+  background: #fef2f2;
   padding: var(--space-4);
   border-radius: var(--radius-md);
   margin-bottom: var(--space-6);
-  border: 1px solid var(--color-danger);
+  border: 1px solid #fee2e2;
+  font-weight: 500;
 }
 
+.mb-6 { margin-bottom: var(--space-6); }

frontend/src/app/features/checkout/checkout.component.ts

@@ -6,6 +6,7 @@ import { TranslateModule } from '@ngx-translate/core';
 import { QuoteEstimatorService } from '../calculator/services/quote-estimator.service';
 import { AppInputComponent } from '../../shared/components/app-input/app-input.component';
 import { AppButtonComponent } from '../../shared/components/app-button/app-button.component';
+import { AppCardComponent } from '../../shared/components/app-card/app-card.component';
 
 @Component({
   selector: 'app-checkout',
@@ -15,7 +16,8 @@ import { AppButtonComponent } from '../../shared/components/app-button/app-butto
     ReactiveFormsModule, 
     TranslateModule,
     AppInputComponent,
-    AppButtonComponent
+    AppButtonComponent,
+    AppCardComponent
   ],
   templateUrl: './checkout.component.html',
   styleUrls: ['./checkout.component.scss']
@@ -75,20 +77,27 @@ export class CheckoutComponent implements OnInit {
     const type = isCompany ? 'BUSINESS' : 'PRIVATE';
     this.checkoutForm.patchValue({ customerType: type });
     
-    // Update validators based on type
     const billingGroup = this.checkoutForm.get('billingAddress') as FormGroup;
     const companyControl = billingGroup.get('companyName');
     const referenceControl = billingGroup.get('referencePerson');
+    const firstNameControl = billingGroup.get('firstName');
+    const lastNameControl = billingGroup.get('lastName');
     
     if (isCompany) {
       companyControl?.setValidators([Validators.required]);
       referenceControl?.setValidators([Validators.required]);
+      firstNameControl?.clearValidators();
+      lastNameControl?.clearValidators();
     } else {
       companyControl?.clearValidators();
       referenceControl?.clearValidators();
+      firstNameControl?.setValidators([Validators.required]);
+      lastNameControl?.setValidators([Validators.required]);
     }
     companyControl?.updateValueAndValidity();
     referenceControl?.updateValueAndValidity();
+    firstNameControl?.updateValueAndValidity();
+    lastNameControl?.updateValueAndValidity();
   }
 
   ngOnInit(): void {

frontend/src/app/features/payment/payment.component.html

@@ -1,21 +1,109 @@
-<div class="payment-container">
-  <mat-card class="payment-card">
-    <mat-card-header>
-      <mat-icon mat-card-avatar>payment</mat-icon>
-      <mat-card-title>Payment Integration</mat-card-title>
-      <mat-card-subtitle>Order #{{ orderId }}</mat-card-subtitle>
-    </mat-card-header>
-    <mat-card-content>
-      <div class="coming-soon">
-        <h3>Coming Soon</h3>
-        <p>The online payment system is currently under development.</p>
-        <p>Your order has been saved. Please contact us to arrange payment.</p>
+<div class="container hero">
+  <h1>{{ 'PAYMENT.TITLE' | translate }}</h1>
+  <p class="subtitle">{{ 'CHECKOUT.SUBTITLE' | translate }}</p>
+</div>
+
+<div class="container">
+  <div class="payment-layout" *ngIf="order() as o">
+    <div class="payment-main">
+      <app-card class="mb-6">
+        <div class="card-header-simple">
+          <h3>{{ 'PAYMENT.METHOD' | translate }}</h3>
+        </div>
+
+        <div class="payment-selection">
+          <div class="methods-grid">
+            <div
+              class="type-option"
+              [class.selected]="selectedPaymentMethod === 'twint'"
+              (click)="selectPayment('twint')">
+              <span class="method-name">TWINT</span>
+            </div>
+            <div
+              class="type-option"
+              [class.selected]="selectedPaymentMethod === 'bill'"
+              (click)="selectPayment('bill')">
+              <span class="method-name">QR Bill / Bank Transfer</span>
+            </div>
+          </div>
+        </div>
+
+        <div class="payment-details fade-in" *ngIf="selectedPaymentMethod === 'twint'">
+          <div class="details-header">
+            <h4>{{ 'PAYMENT.TWINT_TITLE' | translate }}</h4>
+          </div>
+          <div class="qr-placeholder">
+            <div class="qr-box">
+              <span>QR CODE</span>
+            </div>
+            <p>{{ 'PAYMENT.TWINT_DESC' | translate }}</p>
+            <p class="amount">{{ 'PAYMENT.TOTAL' | translate }}: {{ o.totalChf | currency:'CHF' }}</p>
+          </div>
+        </div>
+
+        <div class="payment-details fade-in" *ngIf="selectedPaymentMethod === 'bill'">
+          <div class="details-header">
+            <h4>{{ 'PAYMENT.BANK_TITLE' | translate }}</h4>
+          </div>
+          <div class="bank-details">
+            <p><strong>{{ 'PAYMENT.BANK_OWNER' | translate }}:</strong> 3D Fab Switzerland</p>
+            <p><strong>{{ 'PAYMENT.BANK_IBAN' | translate }}:</strong> CH98 0000 0000 0000 0000 0</p>
+            <p><strong>{{ 'PAYMENT.BANK_REF' | translate }}:</strong> {{ o.id }}</p>
+
+            <div class="qr-bill-actions">
+              <app-button variant="outline" (click)="downloadInvoice()">
+                {{ 'PAYMENT.DOWNLOAD_QR' | translate }}
+              </app-button>
+            </div>
+          </div>
+        </div>
+
+        <div class="actions">
+          <app-button (click)="completeOrder()" [disabled]="!selectedPaymentMethod" [fullWidth]="true">
+            {{ 'PAYMENT.CONFIRM' | translate }}
+          </app-button>
+        </div>
+      </app-card>
+    </div>
+
+    <div class="payment-summary">
+      <app-card class="sticky-card">
+        <div class="card-header-simple">
+          <h3>{{ 'PAYMENT.SUMMARY_TITLE' | translate }}</h3>
+          <p class="order-id">#{{ o.id.substring(0, 8) }}</p>
+        </div>
+
+        <div class="summary-totals">
+          <div class="total-row">
+            <span>{{ 'PAYMENT.SUBTOTAL' | translate }}</span>
+            <span>{{ o.subtotalChf | currency:'CHF' }}</span>
+          </div>
+          <div class="total-row">
+            <span>{{ 'PAYMENT.SHIPPING' | translate }}</span>
+            <span>{{ o.shippingCostChf | currency:'CHF' }}</span>
+          </div>
+          <div class="total-row">
+            <span>{{ 'PAYMENT.SETUP_FEE' | translate }}</span>
+            <span>{{ o.setupCostChf | currency:'CHF' }}</span>
+          </div>
+          <div class="grand-total-row">
+            <span>{{ 'PAYMENT.TOTAL' | translate }}</span>
+            <span>{{ o.totalChf | currency:'CHF' }}</span>
+          </div>
+        </div>
+      </app-card>
+    </div>
+  </div>
+
+  <div *ngIf="loading()" class="loading-state">
+    <app-card>
+      <p>{{ 'PAYMENT.LOADING' | translate }}</p>
+    </app-card>
+  </div>
+
+  <div *ngIf="error()" class="error-message">
+    <app-card>
+      <p>{{ error() }}</p>
+    </app-card>
   </div>
-    </mat-card-content>
-    <mat-card-actions align="end">
-      <button mat-raised-button color="primary" (click)="completeOrder()">
-        Simulate Payment Completion
-      </button>
-    </mat-card-actions>
-  </mat-card>
 </div>

frontend/src/app/features/payment/payment.component.scss

@@ -1,35 +1,202 @@
-.payment-container {
-  display: flex;
-  justify-content: center;
-  align-items: center;
-  min-height: 80vh;
-  padding: 2rem;
-  background-color: #f5f5f5;
-}
-
-.payment-card {
-  max-width: 500px;
-  width: 100%;
-}
-
-.coming-soon {
+.hero {
+  padding: var(--space-12) 0 var(--space-8);
   text-align: center;
-  padding: 2rem 0;
+
+  h1 {
+    font-size: 2.5rem;
+    margin-bottom: var(--space-2);
+  }
+}
+
+.subtitle {
+  font-size: 1.125rem;
+  color: var(--color-text-muted);
+  max-width: 600px;
+  margin: 0 auto;
+}
+
+.payment-layout {
+  display: grid;
+  grid-template-columns: 1fr 400px;
+  gap: var(--space-8);
+  align-items: start;
+  margin-bottom: var(--space-12);
+
+  @media (max-width: 1024px) {
+    grid-template-columns: 1fr;
+    gap: var(--space-8);
+  }
+}
+
+.card-header-simple {
+  margin-bottom: var(--space-6);
+  padding-bottom: var(--space-4);
+  border-bottom: 1px solid var(--color-border);
 
   h3 {
-    margin-bottom: 1rem;
-    color: #555;
+    font-size: 1.25rem;
+    font-weight: 600;
+    color: var(--color-text);
+    margin: 0;
   }
 
+  .order-id {
+    font-size: 0.875rem;
+    color: var(--color-text-muted);
+    margin-top: 2px;
+  }
+}
+
+.payment-selection {
+  margin-bottom: var(--space-6);
+}
+
+.methods-grid {
+  display: grid;
+  grid-template-columns: 1fr 1fr;
+  gap: var(--space-4);
+
+  @media (max-width: 600px) {
+    grid-template-columns: 1fr;
+  }
+}
+
+.type-option {
+  border: 2px solid var(--color-border);
+  border-radius: var(--radius-md);
+  padding: var(--space-6);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  cursor: pointer;
+  transition: all 0.2s ease;
+  background: var(--color-bg-card);
+  text-align: center;
+  font-weight: 600;
+  color: var(--color-text-muted);
+
+  &:hover {
+    border-color: var(--color-brand);
+    color: var(--color-text);
+  }
+
+  &.selected {
+    border-color: var(--color-brand);
+    background-color: var(--color-neutral-100);
+    color: #000;
+    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
+  }
+}
+
+.payment-details {
+  background: var(--color-neutral-100);
+  border-radius: var(--radius-md);
+  padding: var(--space-6);
+  margin-bottom: var(--space-6);
+  border: 1px solid var(--color-border);
+
+  .details-header {
+    margin-bottom: var(--space-4);
+    h4 {
+      margin: 0;
+      font-size: 1.1rem;
+      font-weight: 600;
+    }
+  }
+}
+
+.qr-placeholder {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  text-align: center;
+
+  .qr-box {
+    width: 180px;
+    height: 180px;
+    background-color: white;
+    border: 2px solid var(--color-neutral-900);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    font-weight: bold;
+    margin-bottom: var(--space-4);
+    border-radius: var(--radius-md);
+  }
+
+  .amount {
+    font-size: 1.25rem;
+    font-weight: 700;
+    margin-top: var(--space-2);
+    color: var(--color-text);
+  }
+}
+
+.bank-details {
   p {
-    color: #777;
-    margin-bottom: 0.5rem;
+    margin-bottom: var(--space-2);
+    font-size: 1rem;
+    color: var(--color-text);
   }
 }
 
-mat-icon {
-  font-size: 40px;
-  width: 40px;
-  height: 40px;
-  color: #3f51b5;
+.qr-bill-actions {
+  margin-top: var(--space-4);
+}
+
+.sticky-card {
+  position: sticky;
+  top: var(--space-6);
+}
+
+.summary-totals {
+  background: var(--color-neutral-100);
+  padding: var(--space-6);
+  border-radius: var(--radius-md);
+
+  .total-row {
+    display: flex;
+    justify-content: space-between;
+    margin-bottom: var(--space-2);
+    font-size: 0.95rem;
+    color: var(--color-text-muted);
+  }
+
+  .grand-total-row {
+    display: flex;
+    justify-content: space-between;
+    color: var(--color-text);
+    font-weight: 700;
+    font-size: 1.5rem;
+    margin-top: var(--space-4);
+    padding-top: var(--space-4);
+    border-top: 2px solid var(--color-border);
+  }
+}
+
+.actions {
+  margin-top: var(--space-8);
+}
+
+.fade-in {
+  animation: fadeIn 0.4s ease-out;
+}
+
+@keyframes fadeIn {
+  from {
+    opacity: 0;
+    transform: translateY(-5px);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0);
+  }
+}
+
+.mb-6 { margin-bottom: var(--space-6); }
+
+.error-message,
+.loading-state {
+  margin-top: var(--space-12);
+  text-align: center;
 }

frontend/src/app/features/payment/payment.component.ts

@@ -1,34 +1,75 @@
-import { Component, OnInit } from '@angular/core';
+import { Component, OnInit, inject, signal } from '@angular/core';
 import { CommonModule } from '@angular/common';
 import { ActivatedRoute, Router } from '@angular/router';
-import { MatButtonModule } from '@angular/material/button';
-import { MatCardModule } from '@angular/material/card';
-import { MatIconModule } from '@angular/material/icon';
+import { AppButtonComponent } from '../../shared/components/app-button/app-button.component';
+import { AppCardComponent } from '../../shared/components/app-card/app-card.component';
+import { QuoteEstimatorService } from '../calculator/services/quote-estimator.service';
+import { TranslateModule } from '@ngx-translate/core';
 
 @Component({
   selector: 'app-payment',
   standalone: true,
-  imports: [CommonModule, MatButtonModule, MatCardModule, MatIconModule],
+  imports: [CommonModule, AppButtonComponent, AppCardComponent, TranslateModule],
   templateUrl: './payment.component.html',
   styleUrl: './payment.component.scss'
 })
 export class PaymentComponent implements OnInit {
-  orderId: string | null = null;
+  private route = inject(ActivatedRoute);
+  private router = inject(Router);
+  private quoteService = inject(QuoteEstimatorService);
 
-  constructor(
-    private route: ActivatedRoute,
-    private router: Router
-  ) {}
+  orderId: string | null = null;
+  selectedPaymentMethod: 'twint' | 'bill' | null = null;
+  order = signal<any>(null);
+  loading = signal(true);
+  error = signal<string | null>(null);
 
   ngOnInit(): void {
     this.orderId = this.route.snapshot.paramMap.get('orderId');
+    if (this.orderId) {
+      this.loadOrder();
+    } else {
+      this.error.set('Order ID not found.');
+      this.loading.set(false);
+    }
+  }
+
+  loadOrder() {
+    if (!this.orderId) return;
+    this.quoteService.getOrder(this.orderId).subscribe({
+      next: (order) => {
+        this.order.set(order);
+        this.loading.set(false);
+      },
+      error: (err) => {
+        console.error('Failed to load order', err);
+        this.error.set('Failed to load order details.');
+        this.loading.set(false);
+      }
+    });
+  }
+
+  selectPayment(method: 'twint' | 'bill'): void {
+    this.selectedPaymentMethod = method;
+  }
+
+  downloadInvoice() {
+    if (!this.orderId) return;
+    this.quoteService.getOrderInvoice(this.orderId).subscribe({
+      next: (blob) => {
+        const url = window.URL.createObjectURL(blob);
+        const a = document.createElement('a');
+        a.href = url;
+        a.download = `invoice-${this.orderId}.pdf`;
+        a.click();
+        window.URL.revokeObjectURL(url);
+      },
+      error: (err) => console.error('Failed to download invoice', err)
+    });
   }
 
   completeOrder(): void {
-    // Simulate payment completion
     alert('Payment Simulated! Order marked as PAID.');
-    // Here you would call the backend to mark as paid if we had that endpoint ready
-    // For now, redirect home or show success
     this.router.navigate(['/']);
   }
 }

frontend/src/assets/i18n/en.json

@@ -151,6 +151,7 @@
   },
   "CHECKOUT": {
     "TITLE": "Checkout",
+    "SUBTITLE": "Complete your order by entering the shipping and payment details.",
     "CONTACT_INFO": "Contact Information",
     "BILLING_ADDR": "Billing Address",
     "SHIPPING_ADDR": "Shipping Address",
@@ -171,6 +172,25 @@
     "SUBTOTAL": "Subtotal",
     "SETUP_FEE": "Setup Fee",
     "TOTAL": "Total",
-    "QTY": "Qty"
+    "QTY": "Qty",
+    "SHIPPING": "Shipping"
+  },
+  "PAYMENT": {
+    "TITLE": "Payment",
+    "METHOD": "Payment Method",
+    "TWINT_TITLE": "Pay with TWINT",
+    "TWINT_DESC": "Scan the code with your TWINT app",
+    "BANK_TITLE": "Bank Transfer",
+    "BANK_OWNER": "Owner",
+    "BANK_IBAN": "IBAN",
+    "BANK_REF": "Reference",
+    "DOWNLOAD_QR": "Download QR-Invoice (PDF)",
+    "CONFIRM": "Confirm Order",
+    "SUMMARY_TITLE": "Order Summary",
+    "SUBTOTAL": "Subtotal",
+    "SHIPPING": "Shipping",
+    "SETUP_FEE": "Setup Fee",
+    "TOTAL": "Total",
+    "LOADING": "Loading order details..."
   }
 }

frontend/src/assets/i18n/it.json

@@ -130,6 +130,7 @@
   },
   "CHECKOUT": {
     "TITLE": "Checkout",
+    "SUBTITLE": "Completa il tuo ordine inserendo i dettagli per la spedizione e il pagamento.",
     "CONTACT_INFO": "Informazioni di Contatto",
     "BILLING_ADDR": "Indirizzo di Fatturazione",
     "SHIPPING_ADDR": "Indirizzo di Spedizione",
@@ -150,6 +151,25 @@
     "SUBTOTAL": "Subtotale",
     "SETUP_FEE": "Costo di Avvio",
     "TOTAL": "Totale",
-    "QTY": "Qtà"
+    "QTY": "Qtà",
+    "SHIPPING": "Spedizione"
+  },
+  "PAYMENT": {
+    "TITLE": "Pagamento",
+    "METHOD": "Metodo di Pagamento",
+    "TWINT_TITLE": "Paga con TWINT",
+    "TWINT_DESC": "Inquadra il codice con l'app TWINT",
+    "BANK_TITLE": "Bonifico Bancario",
+    "BANK_OWNER": "Titolare",
+    "BANK_IBAN": "IBAN",
+    "BANK_REF": "Riferimento",
+    "DOWNLOAD_QR": "Scarica QR-Fattura (PDF)",
+    "CONFIRM": "Conferma Ordine",
+    "SUMMARY_TITLE": "Riepilogo Ordine",
+    "SUBTOTAL": "Subtotale",
+    "SHIPPING": "Spedizione",
+    "SETUP_FEE": "Costo Setup",
+    "TOTAL": "Totale",
+    "LOADING": "Caricamento dettagli ordine..."
   }
 }