"""This module holds the logic for doing simple data conversions."""
import re


def escape_term(term):
    """Apply escaping to the passed in query term.

    Args:
        term: String

    Returns:
        String with escaped characters
    """
    escape_rules = [
        '+',
        '-',
        '&&',
        '/',
        '||',
        '!',
        '(',
        ')',
        '{',
        '}',
        '[',
        ']',
        '^',
        '~',
        '*',
        '?',
        ':',
        '"',
    ]
    escaped_term = term.replace('\\', r'\\')
    for rule in escape_rules:
        escaped_term = escaped_term.replace(rule, fr'\{rule}')

    return escaped_term


def to_snake_case_dict(dictionary):
    """Apply snake case to dictionary keys.

    Args:
        dictionary: dict

    Returns:
        Dictionary with snake case keys
    """
    result = dict()
    pattern = re.compile(r'(?<!^)(?=[A-Z])')
    for k in dictionary:
        converted_key = pattern.sub('_', k).lower()
        result[converted_key] = dictionary[k]

    return result