from openslides.utils.rest_api import CharField, IntegerField, ModelSerializer
from openslides.utils.validate import validate_html

from .models import Topic


class TopicSerializer(ModelSerializer):
    """
    Serializer for core.models.Topic objects.
    """
    agenda_type = IntegerField(write_only=True, required=False, min_value=1, max_value=3)
    agenda_parent_id = IntegerField(write_only=True, required=False, min_value=1)
    agenda_comment = CharField(write_only=True, required=False, allow_blank=True)
    agenda_duration = IntegerField(write_only=True, required=False, min_value=1)
    agenda_weight = IntegerField(write_only=True, required=False, min_value=1)

    class Meta:
        model = Topic
        fields = (
            'id',
            'title',
            'text',
            'attachments',
            'agenda_item_id',
            'agenda_type',
            'agenda_parent_id',
            'agenda_comment',
            'agenda_duration',
            'agenda_weight',
        )

    def validate(self, data):
        if 'text' in data:
            data['text'] = validate_html(data['text'])
        return data

    def create(self, validated_data):
        """
        Customized create method. Set information about related agenda item
        into agenda_item_update_information container.
        """
        agenda_type = validated_data.pop('agenda_type', None)
        agenda_parent_id = validated_data.pop('agenda_parent_id', None)
        agenda_comment = validated_data.pop('agenda_comment', None)
        agenda_duration = validated_data.pop('agenda_duration', None)
        agenda_weight = validated_data.pop('agenda_weight', None)
        attachments = validated_data.pop('attachments', [])
        topic = Topic(**validated_data)
        topic.agenda_item_update_information['type'] = agenda_type
        topic.agenda_item_update_information['parent_id'] = agenda_parent_id
        topic.agenda_item_update_information['comment'] = agenda_comment
        topic.agenda_item_update_information['duration'] = agenda_duration
        topic.agenda_item_update_information['weight'] = agenda_weight
        topic.save()
        topic.attachments.add(*attachments)
        return topic