feat: finalize voucher handling and discount display in summary and overview

src/BusProNet/DataProcessor/BookingDataProcessor.php

@@ -902,8 +902,9 @@ class BookingDataProcessor
             }
 
             // Add goodwill voucher as participant-level einloesecode
-            // Goodwill vouchers are excluded from inquiry bookings and only allowed in final booking requests
-            if (false === $isInquiryBooking && Constants::BOOKING_TYPE_BOOKING === $bookingType) {
+            // Goodwill vouchers are excluded from inquiry bookings (status='A') but included in final bookings (status='F')
+            // They can be sent in both validation requests (buchungsart=Anfrage) and commit requests (buchungsart=Buchung)
+            if (false === $isInquiryBooking) {
                 $goodwillCode = $this->getGoodwillVoucherCodeForParticipant($participant);
                 if (null !== $goodwillCode) {
                     $participantData['einloesecode'] = $goodwillCode;
@@ -1205,8 +1206,8 @@ class BookingDataProcessor
 
         foreach ($bookingDto->participants as $participant) {
             if (null !== $participant->purchaseVoucherCode && '' !== trim($participant->purchaseVoucherCode)) {
-                // Exclude goodwill vouchers (flagged by field handler)
-                if (false === $participant->hasGoodwillVoucher) {
+                // Exclude goodwill vouchers
+                if (false === $participant->hasGoodwillVoucher()) {
                     $vouchers[] = trim($participant->purchaseVoucherCode);
                 }
             }
@@ -1242,7 +1243,7 @@ class BookingDataProcessor
      */
     private function getGoodwillVoucherCodeForParticipant(ParticipantDto $participant): ?string
     {
-        if (true === $participant->hasGoodwillVoucher && null !== $participant->purchaseVoucherCode && '' !== trim($participant->purchaseVoucherCode)) {
+        if ($participant->hasGoodwillVoucher() && null !== $participant->purchaseVoucherCode && '' !== trim($participant->purchaseVoucherCode)) {
             return trim($participant->purchaseVoucherCode);
         }
 

src/BusProNet/Model/BookingResponse.php

@@ -47,4 +47,59 @@ class BookingResponse
     {
         return 'erfolgt' === $this->status;
     }
+
+    /**
+     * Gets voucher discounts from price items (AKTION and KULANZGUTSCHEIN types).
+     *
+     * Promotional vouchers appear as negative price items with art="AKTION".
+     * Goodwill vouchers appear as negative price items with art="KULANZGUTSCHEIN".
+     *
+     * @return array<PriceItem> Price items representing voucher discounts
+     */
+    public function getVoucherDiscountsFromPrices(): array
+    {
+        return array_filter(
+            $this->priceItems,
+            fn (PriceItem $item) => \in_array($item->type, ['AKTION', 'KULANZGUTSCHEIN'], true)
+        );
+    }
+
+    /**
+     * Gets total discount from price-based vouchers (promotional and goodwill).
+     *
+     * Returns the absolute sum of negative price items with AKTION or KULANZGUTSCHEIN types.
+     */
+    public function getVoucherDiscountFromPrices(): float
+    {
+        $discount = 0.0;
+        foreach ($this->getVoucherDiscountsFromPrices() as $item) {
+            // Price items for vouchers are negative, so we take absolute value
+            $discount += abs($item->totalPrice);
+        }
+
+        return round($discount, 2);
+    }
+
+    /**
+     * Gets total discount from purchase vouchers in payment terms.
+     */
+    public function getPurchaseVoucherDiscount(): float
+    {
+        return $this->paymentTerms?->getPurchaseVoucherDiscount() ?? 0.0;
+    }
+
+    /**
+     * Gets total voucher discount from all sources.
+     *
+     * Combines discounts from:
+     * - Price items (art="AKTION" for promotional, art="KULANZGUTSCHEIN" for goodwill)
+     * - Payment terms (kaufgutschein elements for purchase vouchers)
+     */
+    public function getTotalVoucherDiscount(): float
+    {
+        return round(
+            $this->getVoucherDiscountFromPrices() + $this->getPurchaseVoucherDiscount(),
+            2
+        );
+    }
 }

src/BusProNet/Model/PaymentTerms.php

@@ -6,14 +6,33 @@ namespace App\BusProNet\Model;
 
 /**
  * Represents payment terms from the booking response.
+ *
+ * Contains deposit/final payment details and any applied purchase vouchers.
  */
 class PaymentTerms
 {
+    /**
+     * @param array<array{nummer: string, betrag: float}> $appliedPurchaseVouchers
+     */
     public function __construct(
         public readonly ?float $depositAmount = null,
         public readonly ?string $depositDate = null,
         public readonly ?float $finalPaymentAmount = null,
         public readonly ?string $finalPaymentDate = null,
+        public readonly array $appliedPurchaseVouchers = [],
     ) {
     }
+
+    /**
+     * Gets the total discount from purchase vouchers.
+     */
+    public function getPurchaseVoucherDiscount(): float
+    {
+        $total = 0.0;
+        foreach ($this->appliedPurchaseVouchers as $voucher) {
+            $total += $voucher['betrag'];
+        }
+
+        return round($total, 2);
+    }
 }

src/BusProNet/XmlParser/BookingResponseParser.php

@@ -106,11 +106,22 @@ class BookingResponseParser extends AbstractParser
             $finalPaymentDate = $finalPaymentNode->attr('termin');
         }
 
+        // Parse purchase vouchers (kaufgutschein elements)
+        $appliedPurchaseVouchers = [];
+        $voucherNodes = $paymentNode->filterXPath('//kaufgutschein');
+        $voucherNodes->each(function (Crawler $voucherNode) use (&$appliedPurchaseVouchers): void {
+            $appliedPurchaseVouchers[] = [
+                'nummer' => $voucherNode->attr('nummer') ?? '',
+                'betrag' => $this->stringToFloat($voucherNode->attr('betrag')),
+            ];
+        });
+
         return new PaymentTerms(
             depositAmount: $depositAmount,
             depositDate: $depositDate,
             finalPaymentAmount: $finalPaymentAmount,
-            finalPaymentDate: $finalPaymentDate
+            finalPaymentDate: $finalPaymentDate,
+            appliedPurchaseVouchers: $appliedPurchaseVouchers,
         );
     }
 }

src/Controller/Booking/Create/Step3Controller.php

@@ -6,6 +6,7 @@ namespace App\Controller\Booking\Create;
 
 use App\BusProNet\ApiClient;
 use App\BusProNet\Exception\TimeoutException;
+use App\BusProNet\Model\BookingResponse;
 use App\BusProNet\Model\Notification;
 use App\Controller\Booking\Traits\BookingCreateTrait;
 use App\Controller\Booking\Traits\BookingExceptionHandlerTrait;
@@ -121,16 +122,22 @@ class Step3Controller extends AbstractController
                 }
 
                 // Validate price match (rounded to cent precision to avoid floating-point errors)
+                // API gesamtpreis includes promotional/goodwill voucher discounts (negative price items),
+                // but NOT purchase vouchers (those reduce restzahlung, not gesamtpreis)
                 $apiTotal = round($inquiryResponse->totalPrice ?? 0.0, 2);
-                $calculatedTotal = round($this->priceCalculator->calculateGrandTotal($bookingCreateDto), 2);
+                $calculatedSubtotal = round($this->priceCalculator->calculateGrandTotal($bookingCreateDto), 2);
+                $promoGoodwillDiscount = round($inquiryResponse->getVoucherDiscountFromPrices(), 2);
+                $expectedTotal = round($calculatedSubtotal - $promoGoodwillDiscount, 2);
 
-                if ($apiTotal !== $calculatedTotal) {
+                if ($apiTotal !== $expectedTotal) {
                     return $this->handleApiError(
                         'Price mismatch detected - payload incomplete',
                         [
                             'apiTotal' => $apiTotal,
-                            'calculatedTotal' => $calculatedTotal,
-                            'difference' => abs($apiTotal - $calculatedTotal),
+                            'calculatedSubtotal' => $calculatedSubtotal,
+                            'promoGoodwillDiscount' => $promoGoodwillDiscount,
+                            'expectedTotal' => $expectedTotal,
+                            'difference' => abs($apiTotal - $expectedTotal),
                         ],
                         'Ein technischer Fehler ist aufgetreten.',
                         $bookingCreateDto,
@@ -225,11 +232,11 @@ class Step3Controller extends AbstractController
      * an inquiry rather than showing an error. This handles scenarios where
      * availability changes between booking initialization and validation.
      *
-     * @param \App\BusProNet\Model\BookingResponse $response The API response
+     * @param BookingResponse $response The API response
      *
      * @return bool True if should fallback to inquiry mode, false if should show error
      */
-    private function shouldFallbackToInquiryMode(\App\BusProNet\Model\BookingResponse $response): bool
+    private function shouldFallbackToInquiryMode(BookingResponse $response): bool
     {
         // Check for "nicht möglich" status + inquiry suggestion in message
         if ('nicht möglich' !== $response->status) {

src/Form/Model/AcceptedVoucherDto.php

@@ -0,0 +1,41 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Form\Model;
+
+/**
+ * Represents a voucher discount accepted by the BPN API.
+ *
+ * This is the base class for all voucher types (promotional, purchase, goodwill).
+ * Instances are created from API responses and stored in BookingDto for display.
+ */
+class AcceptedVoucherDto
+{
+    public const TYPE_PROMOTIONAL = 'promotional';
+    public const TYPE_PURCHASE = 'purchase';
+    public const TYPE_GOODWILL = 'goodwill';
+
+    public function __construct(
+        public readonly string $type,
+        public readonly string $code,
+        public readonly float $amount,
+        public readonly ?string $description = null,
+    ) {
+    }
+
+    public function isPromotional(): bool
+    {
+        return self::TYPE_PROMOTIONAL === $this->type;
+    }
+
+    public function isPurchase(): bool
+    {
+        return self::TYPE_PURCHASE === $this->type;
+    }
+
+    public function isGoodwill(): bool
+    {
+        return self::TYPE_GOODWILL === $this->type;
+    }
+}

src/Form/Model/AcceptedVouchersDto.php

@@ -0,0 +1,72 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Form\Model;
+
+/**
+ * Collection of accepted vouchers from BPN API response.
+ *
+ * Stores voucher discounts parsed from booking inquiry/creation responses.
+ * Used to display voucher discounts in booking summaries and for price validation.
+ */
+class AcceptedVouchersDto
+{
+    /** @var array<AcceptedVoucherDto> */
+    private array $vouchers = [];
+
+    private float $totalDiscount = 0.0;
+
+    public function addVoucher(AcceptedVoucherDto $voucher): void
+    {
+        $this->vouchers[] = $voucher;
+        $this->totalDiscount = round($this->totalDiscount + $voucher->amount, 2);
+    }
+
+    /**
+     * @return array<AcceptedVoucherDto>
+     */
+    public function getVouchers(): array
+    {
+        return $this->vouchers;
+    }
+
+    /**
+     * @return array<AcceptedVoucherDto>
+     */
+    public function getPromotionalVouchers(): array
+    {
+        return array_filter($this->vouchers, fn (AcceptedVoucherDto $v) => $v->isPromotional());
+    }
+
+    /**
+     * @return array<AcceptedVoucherDto>
+     */
+    public function getPurchaseVouchers(): array
+    {
+        return array_filter($this->vouchers, fn (AcceptedVoucherDto $v) => $v->isPurchase());
+    }
+
+    /**
+     * @return array<AcceptedVoucherDto>
+     */
+    public function getGoodwillVouchers(): array
+    {
+        return array_filter($this->vouchers, fn (AcceptedVoucherDto $v) => $v->isGoodwill());
+    }
+
+    public function getTotalDiscount(): float
+    {
+        return $this->totalDiscount;
+    }
+
+    public function hasVouchers(): bool
+    {
+        return count($this->vouchers) > 0;
+    }
+
+    public function count(): int
+    {
+        return count($this->vouchers);
+    }
+}

src/Form/Model/BookingDto.php

@@ -77,6 +77,65 @@ class BookingDto
     {
     }
 
+    /**
+     * Builds AcceptedVouchers from validated participant voucher data.
+     *
+     * Computes voucher discounts from validated vouchers stored on participants.
+     * This allows displaying voucher savings as soon as vouchers are validated
+     * in Step 2, rather than waiting for Step 3 API confirmation.
+     *
+     * For promo vouchers with percentage discounts, we need the participant price
+     * to calculate the actual discount amount.
+     *
+     * @param array<int, float>|null $participantPrices Prices per participant index for percentage calculation
+     */
+    public function getAcceptedVouchers(?array $participantPrices = null): ?AcceptedVouchersDto
+    {
+        $acceptedVouchers = new AcceptedVouchersDto();
+        $processedPromoCodes = [];
+
+        foreach ($this->participants as $index => $participant) {
+            // Process purchase voucher
+            if (null !== $participant->validatedPurchaseVoucher) {
+                $voucher = $participant->validatedPurchaseVoucher;
+                $acceptedVouchers->addVoucher(new AcceptedVoucherDto(
+                    type: $voucher->isGoodwill() ? AcceptedVoucherDto::TYPE_GOODWILL : AcceptedVoucherDto::TYPE_PURCHASE,
+                    code: $voucher->voucherNumber,
+                    amount: $voucher->remainingBalance,
+                    description: $voucher->isGoodwill() ? 'Kulanzgutschein' : 'Kaufgutschein',
+                ));
+            }
+
+            // Process promo voucher
+            if (null !== $participant->validatedPromoVoucher) {
+                $voucher = $participant->validatedPromoVoucher;
+
+                // For per-booking vouchers, only count once
+                if ($voucher->isPerBooking()) {
+                    if (isset($processedPromoCodes[$voucher->code])) {
+                        continue;
+                    }
+                    $processedPromoCodes[$voucher->code] = true;
+                }
+
+                // Calculate discount amount
+                $discountAmount = $voucher->discountAmount;
+                if ($voucher->discountPercentage > 0 && null !== $participantPrices && isset($participantPrices[$index])) {
+                    $discountAmount = round($participantPrices[$index] * ($voucher->discountPercentage / 100), 2);
+                }
+
+                $acceptedVouchers->addVoucher(new AcceptedVoucherDto(
+                    type: AcceptedVoucherDto::TYPE_PROMOTIONAL,
+                    code: $voucher->code,
+                    amount: $discountAmount,
+                    description: $voucher->description,
+                ));
+            }
+        }
+
+        return $acceptedVouchers->hasVouchers() ? $acceptedVouchers : null;
+    }
+
     public function getMode(): string
     {
         return null !== $this->booking ? self::MODE_EDIT : self::MODE_CREATE;
@@ -251,7 +310,7 @@ class BookingDto
     public function hasGoodwillVouchers(): bool
     {
         foreach ($this->participants as $participant) {
-            if (true === $participant->hasGoodwillVoucher) {
+            if ($participant->hasGoodwillVoucher()) {
                 return true;
             }
         }

src/Form/Model/ParticipantDto.php

@@ -6,6 +6,8 @@ use App\BusProNet\Model\Address;
 use App\BusProNet\Model\Insurance;
 use App\BusProNet\Model\PersonalData;
 use App\BusProNet\Model\Pickup;
+use App\BusProNet\Model\PromoVoucher;
+use App\BusProNet\Model\PurchaseVoucher;
 use App\BusProNet\Model\Service;
 use App\Validator\Constraints as AppAssert;
 use Symfony\Component\Validator\Constraints as Assert;
@@ -129,13 +131,11 @@ class ParticipantDto
     public ?string $purchaseVoucherCode = null;
 
     /**
-     * Flag indicating if the purchase voucher is a goodwill (Kulanz) voucher.
-     *
-     * Goodwill vouchers are treated as promotional vouchers in BPN XML
-     * (sent as <aktionscode> per participant, not in <gutscheine> collection).
+     * Validated purchase voucher from API.
      * Set by ParticipantPurchaseVoucherFieldHandler during form processing.
+     * Contains voucher number, remaining balance, and type (Kauf/Kulanz).
      */
-    public bool $hasGoodwillVoucher = false;
+    public ?PurchaseVoucher $validatedPurchaseVoucher = null;
 
     /**
      * Promo voucher code.
@@ -151,6 +151,13 @@ class ParticipantDto
     )]
     public ?string $promoVoucherCode = null;
 
+    /**
+     * Validated promo voucher from API.
+     * Set by ParticipantPromoVoucherFieldHandler during form processing.
+     * Contains discount amount/percentage and applicability (per person/booking).
+     */
+    public ?PromoVoucher $validatedPromoVoucher = null;
+
     /**
      * @var array<array{type: string, message: string}> Notification messages for user feedback
      */
@@ -279,6 +286,18 @@ class ParticipantDto
         ];
     }
 
+    /**
+     * Checks if this participant has a goodwill (Kulanz) voucher.
+     *
+     * Goodwill vouchers are treated as promotional vouchers in BPN XML
+     * (sent as <aktionscode> per participant, not in <gutscheine> collection).
+     */
+    public function hasGoodwillVoucher(): bool
+    {
+        return null !== $this->validatedPurchaseVoucher
+            && $this->validatedPurchaseVoucher->isGoodwill();
+    }
+
     /**
      * Determines if the participant is a child based on age at current date.
      *

src/Form/Service/ParticipantPromoVoucherFieldHandler.php

@@ -6,19 +6,27 @@ namespace App\Form\Service;
 
 use App\Form\Model\BookingDto;
 use App\Form\Service\Abstract\AbstractParticipantFieldHandler;
+use App\Service\BookingPriceCalculatorService;
+use App\Service\VoucherValidationService;
 
 /**
  * Handles promotional voucher code field processing.
  *
- * Validation is performed by the PromoVoucher constraint on ParticipantEditDto.
- * This handler maintains dependency order to ensure validation occurs after
- * all price-affecting fields have been processed.
+ * Validates promo codes via API and stores the validated voucher data
+ * for early discount display. Validation is also performed by the
+ * PromoVoucher constraint on ParticipantEditDto for form error feedback.
  *
  * Dependencies: ALL price-affecting fields (insurance, services, ski pass, rentals, etc.)
  * since promo validation requires accurate participant pricing.
  */
 class ParticipantPromoVoucherFieldHandler extends AbstractParticipantFieldHandler
 {
+    public function __construct(
+        private readonly VoucherValidationService $voucherValidationService,
+        private readonly BookingPriceCalculatorService $priceCalculatorService,
+    ) {
+    }
+
     public function getFieldName(): string
     {
         return 'promoVoucherCode';
@@ -44,12 +52,42 @@ class ParticipantPromoVoucherFieldHandler extends AbstractParticipantFieldHandle
 
     public function shouldProcess(array $submittedData, string $mode, int $participantIndex): bool
     {
-        // No processing needed - validation handled by PromoVoucher constraint
-        return false;
+        $promoCode = $this->getFieldValue($submittedData, $this->getFieldName());
+
+        return null !== $promoCode && '' !== trim($promoCode);
     }
 
     public function processField(array $submittedData, BookingDto $bookingDto, int $participantIndex): void
     {
-        // No processing needed - validation handled by PromoVoucher constraint
+        $participant = $this->getParticipant($bookingDto, $participantIndex);
+
+        if (null === $participant) {
+            return;
+        }
+
+        $promoCode = $this->getFieldValue($submittedData, $this->getFieldName());
+
+        // Clear validated voucher if code is empty
+        if (null === $promoCode || '' === trim($promoCode)) {
+            $participant->validatedPromoVoucher = null;
+
+            return;
+        }
+
+        // Calculate participant price for validation
+        $participantPrice = $this->priceCalculatorService->calculateIndividualParticipantPrice(
+            $bookingDto,
+            $participantIndex
+        );
+
+        // Validate promo voucher and store result
+        $result = $this->voucherValidationService->validatePromoVoucher(
+            trim($promoCode),
+            $bookingDto->travel->id,
+            $participantPrice
+        );
+
+        // Store validated voucher (null if invalid)
+        $participant->validatedPromoVoucher = $result->isValid ? $result->voucher : null;
     }
 }

src/Form/Service/ParticipantPurchaseVoucherFieldHandler.php

@@ -52,21 +52,17 @@ class ParticipantPurchaseVoucherFieldHandler extends AbstractParticipantFieldHan
 
         $voucherCode = $this->getFieldValue($submittedData, $this->getFieldName());
 
+        // Clear validated voucher if code is empty
         if (null === $voucherCode || '' === trim($voucherCode)) {
+            $participant->validatedPurchaseVoucher = null;
+
             return;
         }
 
-        // Validate voucher to check if it's goodwill type
+        // Validate voucher and store result
         $result = $this->voucherValidationService->validatePurchaseVoucher($voucherCode);
 
-        // Only process valid vouchers
-        if (false === $result->isValid || null === $result->voucher) {
-            return;
-        }
-
-        // Check if this is a goodwill voucher
-        if (true === $result->voucher->isGoodwill()) {
-            $participant->hasGoodwillVoucher = true;
-        }
+        // Store validated voucher (null if invalid)
+        $participant->validatedPurchaseVoucher = $result->isValid ? $result->voucher : null;
     }
 }

templates/booking/_summary.html.twig

@@ -142,12 +142,52 @@
     {# Total Section #}
     {% if pricingData.grandTotal is defined and pricingData.grandTotal > 0 %}
         <div class="pt-4 border-t-2 border-gray-300">
+            {# Show subtotal and voucher discounts when vouchers are applied #}
+            {% set acceptedVouchers = bookingCreateDto.getAcceptedVouchers() %}
+            {% if acceptedVouchers and acceptedVouchers.hasVouchers() %}
+                {# Subtotal before vouchers #}
+                <div class="flex justify-between items-center mb-2">
+                    <span class="text-gray-600">Gesamtpreis:</span>
+                    <span class="text-gray-900">
+                        €{{ pricingData.grandTotal|number_format(2, ',', '.') }}
+                    </span>
+                </div>
+
+                {# Voucher discounts breakdown #}
+                <div class="mb-3 space-y-1">
+                    {% for voucher in acceptedVouchers.vouchers %}
+                        <div class="flex justify-between items-center text-sm">
+                            <span class="text-gray-600">
+                                {% if voucher.promotional %}
+                                    Aktionsgutschein ({{ voucher.code }})
+                                {% elseif voucher.goodwill %}
+                                    Kulanzgutschein ({{ voucher.code }})
+                                {% elseif voucher.purchase %}
+                                    Kaufgutschein ({{ voucher.code }})
+                                {% endif %}
+                            </span>
+                            <span class="font-medium text-green-600">
+                                -€{{ voucher.amount|number_format(2, ',', '.') }}
+                            </span>
+                        </div>
+                    {% endfor %}
+                </div>
+
+                {# Amount to pay after vouchers #}
+                <div class="flex justify-between items-center pt-2 border-t border-gray-200">
+                    <span class="font-bold text-lg text-gray-800">Zu zahlen:</span>
+                    <span class="font-bold text-xl text-gray-900" {{ qa_attribute('summary-total') }}>
+                        €{{ (pricingData.grandTotal - acceptedVouchers.totalDiscount)|number_format(2, ',', '.') }}
+                    </span>
+                </div>
+            {% else %}
                 <div class="flex justify-between items-center">
                     <span class="font-bold text-lg text-gray-800">Gesamtpreis:</span>
                     <span class="font-bold text-xl text-gray-900" {{ qa_attribute('summary-total') }}>
                         €{{ pricingData.grandTotal|number_format(2, ',', '.') }}
                     </span>
                 </div>
+            {% endif %}
         </div>
     {% endif %}
 </div>

templates/booking/create/step_4.html.twig

@@ -86,12 +86,51 @@
                 {# Grand Total #}
                 {% if pricingData.grandTotal is defined and pricingData.grandTotal > 0 %}
                     <div class="pt-4">
+                        {% set acceptedVouchers = bookingCreateDto.getAcceptedVouchers() %}
+                        {% if acceptedVouchers and acceptedVouchers.hasVouchers() %}
+                            {# Subtotal before vouchers #}
+                            <div class="flex justify-between items-center mb-3">
+                                <span class="text-lg text-blue-800">Gesamtpreis:</span>
+                                <span class="text-lg text-blue-800">
+                                    €{{ pricingData.grandTotal|number_format(2, ',', '.') }}
+                                </span>
+                            </div>
+
+                            {# Voucher discounts breakdown #}
+                            <div class="mb-4 space-y-2 pb-4 border-b border-blue-200">
+                                {% for voucher in acceptedVouchers.vouchers %}
+                                    <div class="flex justify-between items-center">
+                                        <span class="text-blue-700">
+                                            {% if voucher.promotional %}
+                                                Aktionsgutschein ({{ voucher.code }})
+                                            {% elseif voucher.goodwill %}
+                                                Kulanzgutschein ({{ voucher.code }})
+                                            {% elseif voucher.purchase %}
+                                                Kaufgutschein ({{ voucher.code }})
+                                            {% endif %}
+                                        </span>
+                                        <span class="font-semibold text-green-600">
+                                            -€{{ voucher.amount|number_format(2, ',', '.') }}
+                                        </span>
+                                    </div>
+                                {% endfor %}
+                            </div>
+
+                            {# Amount to pay after vouchers #}
+                            <div class="flex justify-between items-center">
+                                <span class="font-bold text-xl text-blue-900">Zu zahlen:</span>
+                                <span class="font-bold text-2xl text-blue-900">
+                                    €{{ (pricingData.grandTotal - acceptedVouchers.totalDiscount)|number_format(2, ',', '.') }}
+                                </span>
+                            </div>
+                        {% else %}
                             <div class="flex justify-between items-center">
                                 <span class="font-bold text-xl text-blue-900">Gesamtpreis:</span>
                                 <span class="font-bold text-2xl text-blue-900">
                                     €{{ pricingData.grandTotal|number_format(2, ',', '.') }}
                                 </span>
                             </div>
+                        {% endif %}
                     </div>
                 {% endif %}
             </div>

tests/BusProNet/XmlParser/BookingResponseParserTest.php

@@ -0,0 +1,212 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\BusProNet\XmlParser;
+
+use App\BusProNet\XmlParser\BookingResponseParser;
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\DomCrawler\Crawler;
+
+class BookingResponseParserTest extends TestCase
+{
+    private BookingResponseParser $parser;
+
+    protected function setUp(): void
+    {
+        $this->parser = new BookingResponseParser();
+    }
+
+    public function testParseBookingResponseWithPurchaseVoucher(): void
+    {
+        $xmlContent = '<?xml version="1.0" encoding="utf-8"?>
+<ergebnis>
+    <satz typ="BUCHUNG" />
+    <buchung>möglich</buchung>
+    <vorgang>321530</vorgang>
+    <preise>
+        <preis position="1" art="UNT" unterart="ZIM" bezeichnung="Bett im Mehrbettzimmer" preis="679,00" gesamtpreis="679,00" />
+    </preise>
+    <gesamtpreis>755,00</gesamtpreis>
+    <zahlungsbedingungen>
+        <kaufgutschein nummer="G1263" betrag="100,00"></kaufgutschein>
+        <restzahlung betrag="655,00" termin="02.12.2029"></restzahlung>
+    </zahlungsbedingungen>
+</ergebnis>';
+
+        $crawler = new Crawler($xmlContent);
+        $response = $this->parser->parse($crawler->filter('ergebnis'));
+
+        $this->assertTrue($response->isInquiryValid());
+        $this->assertEquals('321530', $response->transactionNumber);
+        $this->assertEquals(755.0, $response->totalPrice);
+
+        // Verify purchase voucher is parsed
+        $this->assertNotNull($response->paymentTerms);
+        $this->assertCount(1, $response->paymentTerms->appliedPurchaseVouchers);
+        $this->assertEquals('G1263', $response->paymentTerms->appliedPurchaseVouchers[0]['nummer']);
+        $this->assertEquals(100.0, $response->paymentTerms->appliedPurchaseVouchers[0]['betrag']);
+        $this->assertEquals(100.0, $response->paymentTerms->getPurchaseVoucherDiscount());
+        $this->assertEquals(655.0, $response->paymentTerms->finalPaymentAmount);
+    }
+
+    public function testParseBookingResponseWithPromotionalVoucher(): void
+    {
+        $xmlContent = '<?xml version="1.0" encoding="utf-8"?>
+<ergebnis>
+    <satz typ="BUCHUNG" />
+    <buchung>möglich</buchung>
+    <vorgang>321530</vorgang>
+    <preise>
+        <preis position="1" art="UNT" unterart="ZIM" bezeichnung="Bett im Mehrbettzimmer" preis="679,00" gesamtpreis="679,00" />
+        <preis position="2" art="AKTION" unterart="" bezeichnung="TESTERINO1" anzahl="1" zuordnung="1" preis="-100,00" gesamtpreis="-100,00"></preis>
+    </preise>
+    <gesamtpreis>615,20</gesamtpreis>
+    <zahlungsbedingungen>
+        <restzahlung betrag="615,20" termin="29.11.2025"></restzahlung>
+    </zahlungsbedingungen>
+</ergebnis>';
+
+        $crawler = new Crawler($xmlContent);
+        $response = $this->parser->parse($crawler->filter('ergebnis'));
+
+        $this->assertTrue($response->isInquiryValid());
+        $this->assertEquals(615.2, $response->totalPrice);
+
+        // Verify price items include promotional voucher
+        $this->assertCount(2, $response->priceItems);
+        $voucherItem = $response->priceItems[1];
+        $this->assertEquals('AKTION', $voucherItem->type);
+        $this->assertEquals('TESTERINO1', $voucherItem->label);
+        $this->assertEquals(-100.0, $voucherItem->totalPrice);
+
+        // Verify voucher discount extraction
+        $voucherDiscounts = $response->getVoucherDiscountsFromPrices();
+        $this->assertCount(1, $voucherDiscounts);
+        $this->assertEquals(100.0, $response->getVoucherDiscountFromPrices());
+        $this->assertEquals(100.0, $response->getTotalVoucherDiscount());
+    }
+
+    public function testParseBookingResponseWithGoodwillVoucher(): void
+    {
+        $xmlContent = '<?xml version="1.0" encoding="utf-8"?>
+<ergebnis>
+    <satz typ="BUCHUNG" />
+    <buchung>möglich</buchung>
+    <vorgang>321530</vorgang>
+    <preise>
+        <preis position="1" art="UNT" unterart="ZIM" bezeichnung="Bett im Mehrbettzimmer" preis="679,00" gesamtpreis="679,00" />
+        <preis position="2" art="KULANZGUTSCHEIN" unterart="" bezeichnung="Kulanzgutschein K1904" anzahl="1" zuordnung="1" preis="-679,00" gesamtpreis="-679,00"></preis>
+    </preise>
+    <gesamtpreis>0,00</gesamtpreis>
+    <zahlungsbedingungen></zahlungsbedingungen>
+</ergebnis>';
+
+        $crawler = new Crawler($xmlContent);
+        $response = $this->parser->parse($crawler->filter('ergebnis'));
+
+        $this->assertTrue($response->isInquiryValid());
+        $this->assertEquals(0.0, $response->totalPrice);
+
+        // Verify goodwill voucher is parsed
+        $voucherDiscounts = $response->getVoucherDiscountsFromPrices();
+        $this->assertCount(1, $voucherDiscounts);
+
+        $goodwillVoucher = array_values($voucherDiscounts)[0];
+        $this->assertEquals('KULANZGUTSCHEIN', $goodwillVoucher->type);
+        $this->assertEquals('Kulanzgutschein K1904', $goodwillVoucher->label);
+        $this->assertEquals(-679.0, $goodwillVoucher->totalPrice);
+
+        $this->assertEquals(679.0, $response->getVoucherDiscountFromPrices());
+        $this->assertEquals(679.0, $response->getTotalVoucherDiscount());
+    }
+
+    public function testParseBookingResponseWithMultipleVouchers(): void
+    {
+        $xmlContent = '<?xml version="1.0" encoding="utf-8"?>
+<ergebnis>
+    <satz typ="BUCHUNG" />
+    <buchung>möglich</buchung>
+    <vorgang>321530</vorgang>
+    <preise>
+        <preis position="1" art="UNT" unterart="ZIM" bezeichnung="Bett im Mehrbettzimmer" preis="679,00" gesamtpreis="679,00" />
+        <preis position="2" art="AKTION" unterart="" bezeichnung="PROMO10" anzahl="1" zuordnung="1" preis="-50,00" gesamtpreis="-50,00"></preis>
+        <preis position="3" art="KULANZGUTSCHEIN" unterart="" bezeichnung="Kulanzgutschein K123" anzahl="1" zuordnung="1" preis="-30,00" gesamtpreis="-30,00"></preis>
+    </preise>
+    <gesamtpreis>499,00</gesamtpreis>
+    <zahlungsbedingungen>
+        <kaufgutschein nummer="G5678" betrag="100,00"></kaufgutschein>
+        <restzahlung betrag="399,00" termin="02.12.2029"></restzahlung>
+    </zahlungsbedingungen>
+</ergebnis>';
+
+        $crawler = new Crawler($xmlContent);
+        $response = $this->parser->parse($crawler->filter('ergebnis'));
+
+        // Verify all voucher types are parsed
+        $this->assertEquals(80.0, $response->getVoucherDiscountFromPrices()); // 50 + 30
+        $this->assertEquals(100.0, $response->getPurchaseVoucherDiscount());
+        $this->assertEquals(180.0, $response->getTotalVoucherDiscount()); // 50 + 30 + 100
+
+        // Verify price item vouchers
+        $voucherDiscounts = $response->getVoucherDiscountsFromPrices();
+        $this->assertCount(2, $voucherDiscounts);
+    }
+
+    public function testParseBookingResponseWithNoVouchers(): void
+    {
+        $xmlContent = '<?xml version="1.0" encoding="utf-8"?>
+<ergebnis>
+    <satz typ="BUCHUNG" />
+    <buchung>möglich</buchung>
+    <vorgang>321530</vorgang>
+    <preise>
+        <preis position="1" art="UNT" unterart="ZIM" bezeichnung="Bett im Mehrbettzimmer" preis="679,00" gesamtpreis="679,00" />
+    </preise>
+    <gesamtpreis>679,00</gesamtpreis>
+    <zahlungsbedingungen>
+        <restzahlung betrag="679,00" termin="02.12.2029"></restzahlung>
+    </zahlungsbedingungen>
+</ergebnis>';
+
+        $crawler = new Crawler($xmlContent);
+        $response = $this->parser->parse($crawler->filter('ergebnis'));
+
+        $this->assertTrue($response->isInquiryValid());
+        $this->assertEquals(679.0, $response->totalPrice);
+
+        // Verify no voucher discounts
+        $this->assertCount(0, $response->getVoucherDiscountsFromPrices());
+        $this->assertEquals(0.0, $response->getVoucherDiscountFromPrices());
+        $this->assertEquals(0.0, $response->getPurchaseVoucherDiscount());
+        $this->assertEquals(0.0, $response->getTotalVoucherDiscount());
+    }
+
+    public function testParseBookingResponseWithMultiplePurchaseVouchers(): void
+    {
+        $xmlContent = '<?xml version="1.0" encoding="utf-8"?>
+<ergebnis>
+    <satz typ="BUCHUNG" />
+    <buchung>möglich</buchung>
+    <vorgang>321530</vorgang>
+    <preise>
+        <preis position="1" art="UNT" unterart="ZIM" bezeichnung="Bett im Mehrbettzimmer" preis="679,00" gesamtpreis="679,00" />
+    </preise>
+    <gesamtpreis>679,00</gesamtpreis>
+    <zahlungsbedingungen>
+        <kaufgutschein nummer="G1111" betrag="50,00"></kaufgutschein>
+        <kaufgutschein nummer="G2222" betrag="75,00"></kaufgutschein>
+        <restzahlung betrag="554,00" termin="02.12.2029"></restzahlung>
+    </zahlungsbedingungen>
+</ergebnis>';
+
+        $crawler = new Crawler($xmlContent);
+        $response = $this->parser->parse($crawler->filter('ergebnis'));
+
+        // Verify multiple purchase vouchers are parsed
+        $this->assertNotNull($response->paymentTerms);
+        $this->assertCount(2, $response->paymentTerms->appliedPurchaseVouchers);
+        $this->assertEquals(125.0, $response->paymentTerms->getPurchaseVoucherDiscount()); // 50 + 75
+        $this->assertEquals(125.0, $response->getTotalVoucherDiscount());
+    }
+}

tests/Form/Model/AcceptedVouchersTest.php

@@ -0,0 +1,107 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Form\Model;
+
+use App\Form\Model\AcceptedVoucherDto;
+use App\Form\Model\AcceptedVouchersDto;
+use PHPUnit\Framework\TestCase;
+
+class AcceptedVouchersTest extends TestCase
+{
+    public function testAddVoucherCalculatesTotalDiscount(): void
+    {
+        $acceptedVouchers = new AcceptedVouchersDto();
+
+        $acceptedVouchers->addVoucher(new AcceptedVoucherDto(
+            type: AcceptedVoucherDto::TYPE_PROMOTIONAL,
+            code: 'PROMO10',
+            amount: 50.00
+        ));
+
+        $acceptedVouchers->addVoucher(new AcceptedVoucherDto(
+            type: AcceptedVoucherDto::TYPE_PURCHASE,
+            code: 'G1234',
+            amount: 100.00
+        ));
+
+        $this->assertEquals(150.0, $acceptedVouchers->getTotalDiscount());
+        $this->assertCount(2, $acceptedVouchers->getVouchers());
+    }
+
+    public function testFilterVouchersByType(): void
+    {
+        $acceptedVouchers = new AcceptedVouchersDto();
+
+        $acceptedVouchers->addVoucher(new AcceptedVoucherDto(
+            type: AcceptedVoucherDto::TYPE_PROMOTIONAL,
+            code: 'PROMO10',
+            amount: 50.00
+        ));
+
+        $acceptedVouchers->addVoucher(new AcceptedVoucherDto(
+            type: AcceptedVoucherDto::TYPE_PURCHASE,
+            code: 'G1234',
+            amount: 100.00
+        ));
+
+        $acceptedVouchers->addVoucher(new AcceptedVoucherDto(
+            type: AcceptedVoucherDto::TYPE_GOODWILL,
+            code: 'K5678',
+            amount: 75.00
+        ));
+
+        $this->assertCount(1, $acceptedVouchers->getPromotionalVouchers());
+        $this->assertCount(1, $acceptedVouchers->getPurchaseVouchers());
+        $this->assertCount(1, $acceptedVouchers->getGoodwillVouchers());
+    }
+
+    public function testHasVouchersReturnsFalseWhenEmpty(): void
+    {
+        $acceptedVouchers = new AcceptedVouchersDto();
+
+        $this->assertFalse($acceptedVouchers->hasVouchers());
+        $this->assertEquals(0, $acceptedVouchers->count());
+    }
+
+    public function testHasVouchersReturnsTrueWhenNotEmpty(): void
+    {
+        $acceptedVouchers = new AcceptedVouchersDto();
+
+        $acceptedVouchers->addVoucher(new AcceptedVoucherDto(
+            type: AcceptedVoucherDto::TYPE_PROMOTIONAL,
+            code: 'PROMO10',
+            amount: 50.00
+        ));
+
+        $this->assertTrue($acceptedVouchers->hasVouchers());
+        $this->assertEquals(1, $acceptedVouchers->count());
+    }
+
+    public function testFloatPrecisionHandling(): void
+    {
+        $acceptedVouchers = new AcceptedVouchersDto();
+
+        $acceptedVouchers->addVoucher(new AcceptedVoucherDto(
+            type: AcceptedVoucherDto::TYPE_PROMOTIONAL,
+            code: 'PROMO1',
+            amount: 33.33
+        ));
+
+        $acceptedVouchers->addVoucher(new AcceptedVoucherDto(
+            type: AcceptedVoucherDto::TYPE_PROMOTIONAL,
+            code: 'PROMO2',
+            amount: 33.33
+        ));
+
+        $acceptedVouchers->addVoucher(new AcceptedVoucherDto(
+            type: AcceptedVoucherDto::TYPE_PROMOTIONAL,
+            code: 'PROMO3',
+            amount: 33.34
+        ));
+
+        // Should be exactly 100.00 with proper rounding
+        $this->assertEquals(100.0, $acceptedVouchers->getTotalDiscount());
+    }
+}