"""Where the rest of the portal gets its adapters. Tests install fakes with `install`."""

from __future__ import annotations

from django.conf import settings

from .directory import Directory, LdapDirectory
from .idp import Idp, OidcIdp
from .mail import Mailer, SmtpMailer

_directory: Directory | None = None
_idp: Idp | None = None
_mailer: Mailer | None = None


def get_directory() -> Directory:
    global _directory
    if _directory is None:
        _directory = LdapDirectory(settings.DIRECTORY)
    return _directory


def get_idp() -> Idp:
    global _idp
    if _idp is None:
        _idp = OidcIdp(settings.OIDC)
    return _idp


def get_mailer() -> Mailer:
    global _mailer
    if _mailer is None:
        _mailer = SmtpMailer(settings.SMTP)
    return _mailer


def install(
    directory: Directory | None = None, idp: Idp | None = None, mailer: Mailer | None = None
) -> None:
    """Replace the adapters (tests). Passing None for one leaves it to be built on first use."""
    global _directory, _idp, _mailer
    _directory, _idp, _mailer = directory, idp, mailer