# ------------------------------------------------------------------------------
#
# Project: pygeofilter <https://github.com/geopython/pygeofilter>
# Authors: Fabian Schindler <fabian.schindler@eox.at>
#
# ------------------------------------------------------------------------------
# Copyright (C) 2022 EOX IT Services GmbH
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
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# furnished to do so, subject to the following conditions:
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# The above copyright notice and this permission notice shall be included in
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"""General utilities for the OpenSearch backend."""

import re


def like_to_wildcard(
    value: str, wildcard: str, single_char: str, escape_char: str = "\\"
) -> str:
    """Adapts a "LIKE" pattern to create an OpenSearch "wildcard"
    pattern.
    """

    x_wildcard = re.escape(wildcard)
    x_single_char = re.escape(single_char)

    if escape_char == "\\":
        x_escape_char = "\\\\\\\\"
    else:
        x_escape_char = re.escape(escape_char)

    if wildcard != "*":
        value = re.sub(
            f"(?<!{x_escape_char}){x_wildcard}",
            "*",
            value,
        )

    if single_char != "?":
        value = re.sub(
            f"(?<!{x_escape_char}){x_single_char}",
            "?",
            value,
        )

    return value
