"""Request helper methods."""

from marshmallow import ValidationError

from abacus_schedule.constants.constants import DEFAULT_PAGE_LIMIT, DEFAULT_PAGE_OFFSET
from abacus_schedule.constants.error import ERROR_INVALID_LIMIT_OFFSET


def validate_pagination_params(
    limit: int = DEFAULT_PAGE_LIMIT, offset: int = DEFAULT_PAGE_OFFSET
):
    """Validate pagination request parameters."""
    try:
        limit = int(limit)
        offset = int(offset)
    except ValueError:
        raise ValidationError(ERROR_INVALID_LIMIT_OFFSET)

    return {'limit': limit, 'offset': offset}