Major refactor of commerce and Stripe integration

Refactored commerce models to support refunds, invoices, and improved carrier/payment logic. Added new serializers and viewsets for products, categories, images, discount codes, and refunds. Introduced Stripe client integration and removed legacy Stripe admin/model code. Updated Dockerfile for PDF generation dependencies. Removed obsolete migration files and updated configuration app initialization. Added invoice template and tasks for order cleanup.

backend/thirdparty/zasilkovna/models.py

@@ -21,10 +21,11 @@ from django.db import models
 from django.utils import timezone
 from django.core.validators import RegexValidator
 from django.core.files.base import ContentFile
+from django.apps import apps
 
 from .client import PacketaAPI
-from commerce.models import Order, Carrier
-from configuration.models import Configuration
+
+from configuration.models import ShopConfiguration
 
 packeta_client = PacketaAPI()  # single reusable instance
 
@@ -55,6 +56,13 @@ class ZasilkovnaPacket(models.Model):
         help_text="Hmotnost zásilky v gramech"
     )
 
+    # 🚚 návratové směrovací kódy (pro vrácení zásilky)
+    return_routing = models.JSONField(
+        default=list,
+        blank=True,
+        help_text="Seznam 2 routing stringů pro vrácení zásilky"
+    )
+
     class PDF_SIZE(models.TextChoices):
         A6_ON_A6 = ("A6 on A6", "105x148 mm (A6) label on a page of the same size")
         A7_ON_A7 = ("A7 on A7", "105x74 mm (A7) label on a page of the same size")
@@ -63,19 +71,16 @@ class ZasilkovnaPacket(models.Model):
         A8_ON_A8 = ("A8 on A8", "50x74 mm (A8) label on a page of the same size")
     size_of_pdf = models.CharField(max_length=20, choices=PDF_SIZE.choices, default=PDF_SIZE.A6_ON_A6)
 
-
-    # 🚚 návratové směrovací kódy (pro vrácení zásilky)
-    return_routing = models.JSONField(
-        default=list,
-        blank=True,
-        help_text="Seznam 2 routing stringů pro vrácení zásilky"
-    )
-
     def save(self, *args, **kwargs):
-        # On first save, create the packet remotely if packet_id is not set
+        # workaroud to avoid circular import
+        Carrier = apps.get_model('commerce', 'Carrier')
+        Order = apps.get_model('commerce', 'Order')
+
         carrier = Carrier.objects.get(zasilkovna=self)
         order = Order.objects.get(carrier=carrier)
 
+        cash_on_delivery = order.payment.payment_method == order.payment.PAYMENT.CASH_ON_DELIVERY
+
         if not self.packet_id:
             response = packeta_client.create_packet(
                 address_id=self.addressId,
@@ -85,14 +90,13 @@ class ZasilkovnaPacket(models.Model):
                 surname=order.last_name,
                 company=order.company,
                 email=order.email,
-                addressId=Configuration.get_solo().zasilkovna_address_id,
+                addressId=ShopConfiguration.get_solo().zasilkovna_address_id,
                 
-                #FIXME: udělat logiku pro počítaní dobírky a hodnoty zboží
-                cod=100.00,
-                value=100.00,
+                cod=order.total_price if cash_on_delivery else 0, # dobírka
+                value=order.total_price,
 
-                currency=Configuration.get_solo().currency,
-                eshop= Configuration.get_solo().name,
+                currency=ShopConfiguration.get_solo().currency,
+                eshop= ShopConfiguration.get_solo().name,
             )
             self.packet_id = response['packet_id']
             self.barcode = response['barcode']