"""Metadata transformation module."""

from datetime import date, datetime, timezone


def transform_metadata(product_metadata):
    """Transform release metadata from graphQL into ddex rdr formatted metadata."""
    current_date = date.today()
    current_datetime = datetime.now(timezone.utc)
    transformed_metadata = {}
    transformed_metadata['message_thread_id'] = product_metadata.get('productId')
    transformed_metadata['message_id'] = build_message_id(product_metadata.get('productId'), current_datetime)
    transformed_metadata['message_created_date_time'] = current_datetime.isoformat()
    transformed_metadata['message_notification_period_start'] = current_date
    transformed_metadata['message_notification_period_end'] = current_date

    return transformed_metadata


def build_message_id(product_id, current_datetime):
    """Build ddex rdr formatted message_id element."""
    release_created_datetime = current_datetime.strftime('%Y%m%d_%H%M%S')

    return f'{product_id}_{release_created_datetime}'