"""Product app back-office serializers."""
from django.utils.translation import gettext_lazy as _
from rest_framework import serializers

from product import models
from gallery.models import Image


class ProductBackOfficeGallerySerializer(serializers.ModelSerializer):
    """Serializer class for model ProductGallery."""

    class Meta:
        """Meta class"""

        model = models.ProductGallery
        fields = [
            'id',
            'is_main',
        ]

    def get_request_kwargs(self):
        """Get url kwargs from request."""
        return self.context.get('request').parser_context.get('kwargs')

    def validate(self, attrs):
        """Override validate method."""
        product_pk = self.get_request_kwargs().get('pk')
        image_id = self.get_request_kwargs().get('image_id')

        product_qs = models.Product.objects.filter(pk=product_pk)
        image_qs = Image.objects.filter(id=image_id)

        if not product_qs.exists():
            raise serializers.ValidationError({'detail': _('Product not found')})
        if not image_qs.exists():
            raise serializers.ValidationError({'detail': _('Image not found')})

        product = product_qs.first()
        image = image_qs.first()

        attrs['product'] = product
        attrs['image'] = image

        return attrs