import re
from io import BytesIO, TextIOWrapper

from cache import AsyncTTL
from webdav3.client import Client as WebDAVclient

from .settings import SETTINGS

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


@AsyncTTL(time_to_live=SETTINGS.cache_ttl)
async def dav_list_files(regex: re.Pattern, directory: str = "") -> list[str]:
    ls = _WEBDAV_CLIENT.list(directory)
    return [
        f"{directory}/{path}"
        for path in ls
        if regex.search(path)
    ]


@AsyncTTL(time_to_live=SETTINGS.cache_ttl)
async def dav_file_exists(path: str) -> bool:
    return _WEBDAV_CLIENT.check(path)


@AsyncTTL(time_to_live=SETTINGS.cache_ttl)
async def dav_get_file(path: str) -> BytesIO:
    resource = _WEBDAV_CLIENT.resource(path)
    buffer = BytesIO()
    resource.write_to(buffer)

    return buffer


@AsyncTTL(time_to_live=SETTINGS.cache_ttl)
async def dav_get_textfile_content(path: str, encoding="utf-8") -> str:
    buffer = await dav_get_file(path)
    tio = TextIOWrapper(buffer, encoding=encoding)
    tio.seek(0)
    return tio.read().strip()