from base_app.models import User
from django.db import models
from backend_app.fields import JSONField
from backend_app.models.abstract.my_model import (
    MyModel,
    MyModelSerializer,
    MyModelViewSet,
)
from backend_app.permissions.__list_user_post_permission import (
    list_user_post_permission,
)
from backend_app.utils import get_model_config, get_user_level, get_viewset_permissions
from rest_framework import serializers


class UserData(MyModel):
    model_config = get_model_config("UserData")

    owner = models.OneToOneField(User, on_delete=models.CASCADE, primary_key=True)
    contact_info = JSONField(default=dict)
    contact_info_is_public = models.BooleanField(default=False)
    config = JSONField(default=dict)
    other_data = JSONField(default=dict)


class UserDataSerializer(MyModelSerializer):
    owner = serializers.CharField(read_only=True)
    owner_level = serializers.SerializerMethodField()
    owner_can_post_to = serializers.SerializerMethodField()

    def get_owner_level(self, obj):
        return get_user_level(obj.owner)

    def get_owner_can_post_to(self, obj):
        return list_user_post_permission(obj.owner)

    def do_before_save(self):
        """
        For safety: enforce (for sure) that we update the model corresponding to the user/owner.
        """
        super().do_before_save()

        user = self.get_user_from_request()

        self.override_validated_data({"owner": user})

        # we try to recover the correct instance
        query = UserData.objects.filter(owner=user)
        if len(query) == 1:
            self.instance = query[0]

    class Meta:
        model = UserData
        fields = "__all__"


class UserDataViewSet(MyModelViewSet):
    permission_classes = get_viewset_permissions("UserDataViewSet")
    serializer_class = UserDataSerializer
    LIST_SHOULD_BE_DETAIL = True

    def get_queryset(self):
        def get_for_querier():
            return UserData.objects.filter(
                owner=self.request.user
            )  # pylint: disable=E1101

        queryset = get_for_querier()
        if len(queryset) == 0:
            UserData.objects.update_or_create(owner=self.request.user)
            queryset = get_for_querier()
        return queryset