from rest_framework import serializers, status
from rest_framework.exceptions import ValidationError

from apps.patient.models import Patient


class PatientSerializer(serializers.ModelSerializer):
    class Meta:
        model = Patient
        fields = '__all__'
        extra_kwargs = {
            'owners': {'required': False}
        }

    def create(self, validated_data):
        user = self.context['request'].user
        name = validated_data['name']
        exists = Patient.objects.filter(owners=user).filter(name=name)
        if len(exists) > 0:
            raise ValidationError(detail="Patient with name "+name+" already exists", code=status.HTTP_400_BAD_REQUEST)
        patient = Patient.objects.create(
            name=validated_data['name']
        )
        patient.owners.set([user])
        patient.save()
        return patient

    # def update(self, instance, validated_data):
    #     if isinstance(instance, Patient):
    #         if 'name' in validated_data:
    #             instance.name = validated_data['name']
    #         if 'owners' in validated_data:
    #             result = instance.owners.all()
    #             list_result = [entry for entry in result]
    #             list_result.append(validated_data['owners'])
    #             instance.owners.set(list_result)
    #             # list_owner = instance.owners.all()
    #             # list_owner.union(validated_data['owners'])
    #             # listOwners.add(validated_data['owners'])
    #             # instance.owners.set(instance.owners.all() | validated_data['owners']) #.add(validated_data['owners'])
    #         instance.save()
    #         return instance
    #         # patient = (Patient)instance
    #         # user = self.context['request'].user
    #         # if user in instance.owners.all():
    #         #     instance.name = validated_data['name']
    #         #     instance.save()
    #         #     return instance
    #         # else:
    #         #     raise ValidationError(detail="forbidden", code=status.HTTP_403_FORBIDDEN)
    #     raise ValidationError(detail="incorrect input data", code=status.HTTP_400_BAD_REQUEST)