"""Serialization utilities for ows-account."""

import datetime


def serialize_event_value(obj):
    """Serialize a value for use in a Kafka event payload.

    Converts date and datetime objects to ISO 8601 strings; passes other types
    through unchanged.
    """
    if isinstance(obj, datetime.date):
        return obj.isoformat()
    return obj


def serialize_event(event: dict) -> dict:
    """Return a copy of event with all values serialized for Kafka."""
    return {k: serialize_event_value(v) for k, v in event.items()}