"""get_growth_date_range task."""

import datetime

from garcon import task

from activity_detector.flows.analytics_digest import config


@task.decorate(timeout=300)
def get_growth_date_range(activity, start_date, end_date):
    """Get the date range for which to run the growth percentages.

    Args:
        activity (ActivityWorker): garcon activity worker

    Returns:
        dict:
            start_date (str): the start date
            end_date (str): the end date
    """
    return {
        'start_date': (
            datetime.datetime.strptime(start_date, config.DATE_FORMAT) - datetime.timedelta(days=7)
        ).strftime(config.DATE_FORMAT),
        'end_date': (
            datetime.datetime.strptime(end_date, config.DATE_FORMAT) - datetime.timedelta(days=7)
        ).strftime(config.DATE_FORMAT)
    }