from django.core.exceptions import ValidationError
from django.db.models import Q
from django.shortcuts import get_object_or_404
from rest_framework import serializers

from orchestra.api.fields import OptionField
from orchestra.api.serializers import HyperlinkedModelSerializer
from orchestra.apps.accounts.serializers import AccountSerializerMixin

from .models import Website, Content
from .validators import validate_domain_protocol


class RelatedDomainSerializer(AccountSerializerMixin, serializers.HyperlinkedModelSerializer):
    class Meta:
        model = Website.domains.field.rel.to
        fields = ('url', 'name')
    
    def from_native(self, data, files=None):
        queryset = self.opts.model.objects.filter(account=self.account)
        return get_object_or_404(queryset, name=data['name'])


class RelatedWebAppSerializer(AccountSerializerMixin, serializers.HyperlinkedModelSerializer):
    class Meta:
#        model = Content.webapp.field.rel.to
        fields = ('url', 'name', 'type')
    
    def from_native(self, data, files=None):
        queryset = self.opts.model.objects.filter(account=self.account)
        return get_object_or_404(queryset, name=data['name'])


class ContentSerializer(serializers.HyperlinkedModelSerializer):
    webapp = RelatedWebAppSerializer()
    
    class Meta:
        model = Content
        fields = ('webapp', 'path')
    
    def get_identity(self, data):
        return '%s-%s' % (data.get('website'), data.get('path'))


class WebsiteSerializer(AccountSerializerMixin, HyperlinkedModelSerializer):
    domains = RelatedDomainSerializer(many=True, allow_add_remove=True, required=False)
    contents = ContentSerializer(required=False, many=True, allow_add_remove=True,
            source='content_set')
    directives = OptionField(required=False)
    
    class Meta:
        model = Website
        fields = ('url', 'name', 'protocol', 'domains', 'is_active', 'contents', 'directives')
        postonly_fileds = ('name',)
    
    def full_clean(self, instance):
        """ Prevent multiples domains on the same protocol """
        for domain in instance._m2m_data['domains']:
            try:
                validate_domain_protocol(instance, domain, instance.protocol)
            except ValidationError as e:
                # TODO not sure about this one
                self.add_error(None, e)
        return instance