from django.db import models
from rest_framework import serializers
from backend.models.location import Country
from backend.models.my_model import MyModel, MyModelSerializer, MyModelVersionnedViewSet
from backend.utils import get_moderation_level, get_viewset_permissions


class City(MyModel):
    moderation_level = get_moderation_level("City")

    name = models.CharField(max_length=200)
    local_name = models.CharField(max_length=200, null=True, blank=True)
    # We add an area to distinguish similarly named cities
    # in a country
    area = models.CharField(max_length=200, null=True, blank=True)
    country = models.ForeignKey(Country, on_delete=models.PROTECT)


class CitySerializer(MyModelSerializer):
    country_url = serializers.SerializerMethodField()

    def get_country_url(self, obj):
        return serializers.HyperlinkedRelatedField(
            view_name='country-detail',
            read_only=True) \
            .get_url(obj.country, view_name='country-detail',
                     request=self.context['request'], format=None)

    class Meta:
        model = City
        fields = '__all__'


class CityViewSet(MyModelVersionnedViewSet):
    permission_classes = get_viewset_permissions("CityViewSet")
    queryset = City.objects.all()  # pylint: disable=E1101
    serializer_class = CitySerializer