"""
Definition of WebDAV and CalDAV clients.
"""

from functools import lru_cache
from typing import Any, Iterator

from caldav import DAVClient as CalDAVclient
from caldav import Principal as CalDAVPrincipal
from webdav3.client import Client as WebDAVclient
from webdav3.client import Resource as WebDAVResource

from .async_helpers import run_in_executor
from .settings import SETTINGS

_WEBDAV_CLIENT = WebDAVclient({
    "webdav_hostname": SETTINGS.webdav.url,
    "webdav_login":    SETTINGS.webdav.username,
    "webdav_password": SETTINGS.webdav.password,
})


@lru_cache(maxsize=SETTINGS.cache_size)
def webdav_resource(remote_path: Any) -> WebDAVResource:
    """
    Gets a resource using the main WebDAV client.
    """

    return _WEBDAV_CLIENT.resource(
        f"{SETTINGS.webdav_prefix}/{remote_path}"
    )


@run_in_executor
def webdav_list(remote_path: str) -> list[str]:
    """
    Asynchroneously lists a WebDAV path using the main WebDAV client.
    """

    return _WEBDAV_CLIENT.list(
        f"{SETTINGS.webdav_prefix}/{remote_path}"
    )


_CALDAV_CLIENT = CalDAVclient(
    url=SETTINGS.caldav.url,
    username=SETTINGS.caldav.username,
    password=SETTINGS.caldav.password,
)


def caldav_principal() -> CalDAVPrincipal:
    """
    Gets the `Principal` object of the main CalDAV client.
    """

    return _CALDAV_CLIENT.principal()


@run_in_executor
def caldav_list() -> Iterator[str]:
    """
    Asynchroneously lists all calendars using the main WebDAV client.
    """

    return (
        cal.name
        for cal in caldav_principal().calendars()
    )