from rest_framework import serializers
from taggit_serializer.serializers import TagListSerializerField, TaggitSerializer

from .models import Note, Notebook, LuxTag

import six


class NewTagListSerializerField(TagListSerializerField):
    def to_internal_value(self, value):
        if isinstance(value, six.string_types):
            value = [v.strip() for v in value.split(',')]

        if not isinstance(value, list):
            self.fail('not_a_list', input_type=type(value).__name__)

        for s in value:
            if not isinstance(s, six.string_types):
                self.fail('not_a_str')

            self.child.run_validation(s)
        return value


class NoteSerializer(TaggitSerializer, serializers.ModelSerializer):
    tags = NewTagListSerializerField(required=False)

    class Meta:
        model = Note
        fields = ('id', 'title', 'body_text', 'body_qjson', 'body_html', 'url', 'notebook', 'tags')


class NotebookSerializer(serializers.HyperlinkedModelSerializer):
    json_absolute_url = serializers.URLField(source='get_absolute_url', read_only=True)
    owner = serializers.HiddenField(
        default=serializers.CurrentUserDefault()
    )

    class Meta:
        model = Notebook
        fields = ('id', 'name', 'color_rgb', 'json_absolute_url', 'owner')


class NoteTagSerializer(serializers.HyperlinkedModelSerializer):

    class Meta:
        model = LuxTag
        fields = ('name', 'color_hex')