from __future__ import absolute_import

from django.core.urlresolvers import reverse

from rest_framework import serializers

from .models import Document, DocumentVersion, DocumentPage


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


class ResourceDocumentVersion(serializers.HyperlinkedModelSerializer):
    pages = ResourceDocumentPage(many=True, read_only=True)

    class Meta:
        model = DocumentVersion


class ResourceDocument(serializers.HyperlinkedModelSerializer):
    versions = ResourceDocumentVersion(many=True, read_only=True)

    class Meta:
        model = Document