"""Participant Activity schema."""

from marshmallow import Schema, fields, validate


class SocialSpike(Schema):
    """Schema for generic participant event.

    Properties:
        - timestamp (str): ISO formatted datetime string
        - new_followers (int): number of follower increase
        - chartmetric_id (int): chartmetric artist identifier
        - network (string): social network that was event origin
    """

    date = fields.DateTime(required=True, format='%Y-%m-%d')
    new_followers = fields.Integer(required=True)
    chartmetric_id = fields.Integer(required=True)
    network = fields.String(
        required=True, validate=validate.OneOf(['twitter', 'instagram', 'youtube'])
    )