from rest_framework import serializers
from django.forms.models import model_to_dict
from web.models.event import Event
from web.models.event_category import EventCategory
from web.models.event_tag import EventTag


class EventSerializer(serializers.ModelSerializer):

    class Meta:
        model = Event
        fields = '__all__'

    def to_representation(self, instance):
        representation = super().to_representation(instance)

        event_categories = EventCategory.objects.filter(event=instance).filter(active=True).all()
        event_tags = EventTag.objects.filter(event=instance).filter(active=True).all()

        categories = []
        if event_categories.exists():
            for event_category in event_categories:
                categories.append({
                    'id': event_category.category.id,
                    'name': event_category.category.name,
                    'description': event_category.category.description,
                    '_meta': model_to_dict(event_category)
                })

        tags = []
        if event_tags.exists():
            for event_tag in event_tags:
                tags.append({
                    'id': event_tag.tag.id,
                    'name': event_tag.tag.name,
                    '_meta': model_to_dict(event_tag)
                })

        representation['categories'] = categories
        representation['tags'] = tags
        return representation