from __future__ import absolute_import

from django.core.urlresolvers import reverse

from rest_framework import serializers

from .models import Document, DocumentVersion, DocumentPage


class DocumentPageSerializer(serializers.HyperlinkedModelSerializer):
    class Meta:
        model = DocumentPage


class DocumentVersionSerializer(serializers.HyperlinkedModelSerializer):
    pages = DocumentPageSerializer(many=True, read_only=True)

    class Meta:
        model = DocumentVersion


class DocumentSerializer(serializers.HyperlinkedModelSerializer):
    versions = DocumentVersionSerializer(many=True, read_only=True)

    class Meta:
        model = Document