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

from comment.models import Comment
from comment.serializers import CommentSerializer
from establishment.serializers import EstablishmentShortSerializer, EstablishmentProductSerializer, EstablishmentProductShortSerializer
from gallery.models import Image
from product import models
from review.serializers import ReviewShortSerializer
from utils import exceptions as utils_exceptions
from utils.serializers import TranslatedField, FavoritesCreateSerializer, ImageBaseSerializer
from main.serializers import AwardSerializer
from location.serializers import WineRegionBaseSerializer, WineSubRegionBaseSerializer
from tag.serializers import TagBaseSerializer, TagCategoryProductSerializer


class ProductTagSerializer(TagBaseSerializer):
    """Serializer for model Tag."""

    category = TagCategoryProductSerializer(read_only=True)

    class Meta(TagBaseSerializer.Meta):
        """Meta class."""

        fields = TagBaseSerializer.Meta.fields + (
            'category',
        )


class ProductSubTypeBaseSerializer(serializers.ModelSerializer):
    """ProductSubType base serializer"""
    name_translated = TranslatedField()
    index_name_display = serializers.CharField(source='get_index_name_display',
                                               read_only=True)

    class Meta:
        model = models.ProductSubType
        fields = [
            'id',
            'name_translated',
            'index_name_display',
        ]


class ProductTypeBaseSerializer(serializers.ModelSerializer):
    """ProductType base serializer"""
    name_translated = TranslatedField()

    class Meta:
        model = models.ProductType
        fields = [
            'id',
            'name_translated',
            'index_name',
        ]


class ProductClassificationBaseSerializer(serializers.ModelSerializer):
    """Serializer for model ProductClassification."""

    name = serializers.CharField(source='classification_type.name')

    class Meta:
        """Meta class."""
        model = models.ProductClassification
        fields = (
            'name',
        )


class ProductStandardBaseSerializer(serializers.ModelSerializer):
    """Serializer for model ProductStandard."""

    standard_type = serializers.CharField(source='get_standard_type_display')

    class Meta:
        """Meta class."""
        model = models.ProductStandard
        fields = (
            'name',
            'standard_type',
        )


class ProductBaseSerializer(serializers.ModelSerializer):
    """Product base serializer."""
    name = serializers.CharField(source='display_name', read_only=True)
    product_type = ProductTypeBaseSerializer(read_only=True)
    subtypes = ProductSubTypeBaseSerializer(many=True, read_only=True)
    establishment_detail = EstablishmentProductShortSerializer(source='establishment', read_only=True)
    tags = ProductTagSerializer(source='related_tags', many=True, read_only=True)
    wine_region = WineRegionBaseSerializer(read_only=True)
    wine_colors = TagBaseSerializer(many=True, read_only=True)
    preview_image_url = serializers.URLField(allow_null=True,
                                             read_only=True)
    in_favorites = serializers.BooleanField(allow_null=True)

    class Meta:
        """Meta class."""
        model = models.Product
        fields = [
            'id',
            'slug',
            'name',
            'product_type',
            'subtypes',
            'public_mark',
            'establishment_detail',
            'vintage',
            'tags',
            'preview_image_url',
            'wine_region',
            'wine_colors',
            'in_favorites',
        ]


class ProductDetailSerializer(ProductBaseSerializer):
    """Product detail serializer."""
    description_translated = TranslatedField()
    establishment_detail = EstablishmentShortSerializer(source='establishment', read_only=True)
    review = ReviewShortSerializer(source='last_published_review', read_only=True)
    awards = AwardSerializer(many=True, read_only=True)
    classifications = ProductClassificationBaseSerializer(many=True, read_only=True)
    standards = ProductStandardBaseSerializer(many=True, read_only=True)
    wine_sub_region = WineSubRegionBaseSerializer(read_only=True)
    bottles_produced = TagBaseSerializer(many=True, read_only=True)
    sugar_contents = TagBaseSerializer(many=True, read_only=True)
    grape_variety = TagBaseSerializer(many=True, read_only=True)
    image_url = serializers.URLField(allow_null=True,
                                     read_only=True)

    new_image = ImageBaseSerializer(source='crop_main_image', allow_null=True, read_only=True)

    class Meta(ProductBaseSerializer.Meta):
        fields = ProductBaseSerializer.Meta.fields + [
            'description_translated',
            'review',
            'awards',
            'classifications',
            'standards',
            'wine_sub_region',
            'bottles_produced',
            'sugar_contents',
            'image_url',
            'new_image',
            'grape_variety',
        ]


class ProductFavoritesCreateSerializer(FavoritesCreateSerializer):
    """Serializer to create favorite object w/ model Product."""

    def validate(self, attrs):
        """Overridden validate method"""
        # Check product object
        product_qs = models.Product.objects.filter(slug=self.slug)

        # Check product obj by slug from lookup_kwarg
        if not product_qs.exists():
            raise serializers.ValidationError({'detail': _('Object not found.')})
        else:
            product = product_qs.first()

        # Check existence in favorites
        if product.favorites.filter(user=self.user).exists():
            raise utils_exceptions.FavoritesError()

        attrs['product'] = product
        return attrs

    def create(self, validated_data, *args, **kwargs):
        """Overridden create method"""
        validated_data.update({
            'user': self.user,
            'content_object': validated_data.pop('product')
        })
        return super().create(validated_data)


class ProductCommentCreateSerializer(CommentSerializer):
    """Create comment serializer"""
    mark = serializers.IntegerField()

    class Meta:
        """Serializer for model Comment"""
        model = Comment
        fields = [
            'id',
            'created',
            'text',
            'mark',
            'nickname',
            'profile_pic',
        ]

    def validate(self, attrs):
        """Override validate method"""
        # Check product object
        product_slug = self.context.get('request').parser_context.get('kwargs').get('slug')
        product_qs = models.Product.objects.filter(slug=product_slug)
        if not product_qs.exists():
            raise serializers.ValidationError({'detail': _('Product not found.')})
        attrs['product'] = product_qs.first()
        return attrs

    def create(self, validated_data, *args, **kwargs):
        """Override create method"""
        validated_data.update({
            'user': self.context.get('request').user,
            'content_object': validated_data.pop('product')
        })
        return super().create(validated_data)