import asyncio
import functools
from typing import Any

import caldav
from webdav3 import client as WebDAVclient

from .config import SETTINGS

_WEBDAV_CLIENT = WebDAVclient.Client({
    "webdav_hostname": SETTINGS.webdav_url,
    "webdav_login":    SETTINGS.dav_username,
    "webdav_password": SETTINGS.dav_password,
})


def run_in_executor(f):
    """
    Decorator to make blocking function call asyncio compatible
    https://stackoverflow.com/questions/41063331/how-to-use-asyncio-with-existing-blocking-library/
    """

    @functools.wraps(f)
    def inner(*args, **kwargs):
        loop = asyncio.get_running_loop()
        return loop.run_in_executor(
            None,
            functools.partial(f, *args, **kwargs),
        )

    return inner


@functools.lru_cache
def webdav_resource(remote_path: Any) -> WebDAVclient.Resource:
    return _WEBDAV_CLIENT.resource(remote_path)


@run_in_executor
def webdav_list(remote_path: str) -> list:
    return _WEBDAV_CLIENT.list(remote_path)


_CALDAV_CLIENT = caldav.DAVClient(
    url=SETTINGS.caldav_url,
    username=SETTINGS.dav_username,
    password=SETTINGS.dav_password,
)


def caldav_principal() -> caldav.Principal:
    return _CALDAV_CLIENT.principal()