from django.contrib.auth import authenticate
from rest_framework import serializers
from xenua.django.rest.views import UserScopedViewMixin

from xenua.django.rest.models import Token


class TokenSerializer(UserScopedViewMixin, serializers.ModelSerializer):
    password = serializers.CharField(style={'input_type': 'password'},
                                     trim_whitespace=False, write_only=True, required=False)

    class Meta:
        model = Token
        fields = ('key', 'creation_date', 'password')
        read_only_fields = ('key', 'creation_date')

    def validate(self, attrs):
        username = self.context.get('request').user.username
        password = attrs.get('password')

        if username and password:
            user = authenticate(request=self.context['request'],
                                username=username, password=password)

            if not user:
                raise serializers.ValidationError('unable to log in', code='authorization')

        else:
            raise serializers.ValidationError('include username and password for write operations',
                                              code='authorization')
        return {'user': user}

    def create(self, validated_data):
        return self.Meta.model.objects.create(**validated_data)