from __future__ import annotations

import enum
from typing import cast

from pypika_tortoise.enums import SqlTypes
from pypika_tortoise.functions import Cast, Coalesce
from pypika_tortoise.terms import BasicCriterion, Term


class PostgresRegexMatching(enum.Enum):
    POSIX_REGEX = " ~ "
    IPOSIX_REGEX = " ~* "


def postgres_posix_regex(field: Term, value: str):
    term = cast(Term, field.wrap_constant(value))
    return BasicCriterion(
        PostgresRegexMatching.POSIX_REGEX, Coalesce(Cast(field, SqlTypes.VARCHAR), ""), term
    )


def postgres_insensitive_posix_regex(field: Term, value: str):
    term = cast(Term, field.wrap_constant(value))
    return BasicCriterion(
        PostgresRegexMatching.IPOSIX_REGEX, Coalesce(Cast(field, SqlTypes.VARCHAR), ""), term
    )