"""Request Args Validation."""

from oto import response

from analytics.consts import analytics as analytics_constants
from analytics.validation import date_validation
from analytics.validation import stores_validation

FROM_DATE = 'from_date'
TO_DATE = 'to_date'


def validate_request_args(request_args):
    """Validate request arguments."""
    start_date = request_args.get(FROM_DATE)
    end_date = request_args.get(TO_DATE)

    validated_dates = date_validation.validate_date_range(
        start_date, end_date, analytics_constants.MAX_DAYS_IN_DATE_RANGE)
    if not validated_dates:
        return validated_dates

    validated_stores = stores_validation.validate_streams_stores(
        request_args.get('stores', '').split(','))
    if not validated_stores:
        return validated_stores

    return response.Response()