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class GameDetailSerializer(serializers.ModelSerializer):
    price = serializers.SerializerMethodField()
    # TODO реализовать систему скидок
    discount = serializers.IntegerField(default=0)
    # TODO продумать систему оценок
    is_bought = serializers.BooleanField(default=False)
    is_favorite = serializers.BooleanField(default=False)

    system_requirements = SystemRequirementSerializer(many=True, read_only=True)
    genres = GenreGamesSerializer(many=True, read_only=True)
    dlcs = ProductSerializer(many=True, read_only=False)
    langs = ref_serializers.ProductLanguageSerializer(many=True, read_only=False)
    genres = GenreGamesSerializer(many=True, read_only=True)

    def get_price(self, obj):
        try:
            offer = ProductOffer.objects.get(product=obj).offer
        except ProductOffer.DoesNotExist:
            return None
        return offer.price.amount

    class Meta:
        model = Product
        fields = (
            'id',
            'name',
            'release_date',
            'genres',
            'price',
            'discount',
            'is_bought',
            'is_favorite',
            'description',
            'about',
            'age',
            'adult',
            'adult',
            'status',
            'type',
            'developers_uuid',
            'publishers_uuid',
            'dlcs',
            'langs',
            'system_requirements',
        )