"""Request helper methods."""

from flask import request

from abacus_account.constants.constants import DEFAULT_PAGE_LIMIT
from abacus_account.constants.constants import DEFAULT_PAGE_OFFSET
from abacus_account.constants.error import ERROR_INVALID_LIMIT_OFFSET


def get_optional_numeric_list_from_params():
    """Get ids from request params and validate them."""
    optional_params = request.json
    if not optional_params:
        return
    return [int(param) for param in optional_params]


def validate_pagination_params(
    limit: int = DEFAULT_PAGE_LIMIT,
    offset: int = DEFAULT_PAGE_OFFSET
) -> dict:
    """Format and validate pagination parameters."""
    try:
        limit = int(limit)
        offset = int(offset)
    except ValueError:
        raise Exception(ERROR_INVALID_LIMIT_OFFSET)

    pagination_params = {
        'limit': max(limit, 1),
        'offset': max(offset, DEFAULT_PAGE_OFFSET)
    }

    return pagination_params