# wikiget - CLI tool for downloading files from Wikimedia sites
# Copyright (C) 2018-2023 Cody Logan
# SPDX-License-Identifier: GPL-3.0-or-later
#
# Wikiget is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Wikiget is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Wikiget. If not, see <https://www.gnu.org/licenses/>.

import logging
from argparse import Namespace

from mwclient import APIError, InvalidResponse, LoginError, Site
from mwclient.image import Image
from requests import ConnectionError, HTTPError

import wikiget

logger = logging.getLogger(__name__)


def connect_to_site(site_name: str, args: Namespace) -> Site:
    # connect to site and identify ourselves
    logger.info("Connecting to %s", site_name)

    try:
        site = Site(site_name, path=args.path, clients_useragent=wikiget.USER_AGENT)
        if args.username and args.password:
            logger.info("Attempting to authenticate with credentials")
            site.login(args.username, args.password)
    except ConnectionError as e:
        # usually this means there is no such site, or there's no network connection,
        # though it could be a certificate problem
        logger.error("Could not connect to specified site")
        logger.debug(e)
        raise
    except HTTPError as e:
        # most likely a 403 forbidden or 404 not found error for api.php
        logger.error(
            "Could not find the specified wiki's api.php. Check the value of --path."
        )
        logger.debug(e)
        raise
    except (InvalidResponse, LoginError) as e:
        # InvalidResponse: site exists, but we couldn't communicate with the API
        # endpoint for some reason other than an HTTP error.
        # LoginError: missing or invalid credentials
        logger.error(e)
        raise

    return site


def query_api(filename: str, site: Site) -> Image:
    # get info about the target file
    try:
        image = site.images[filename]
    except APIError as e:
        # an API error at this point likely means access is denied, which could happen
        # with a private wiki
        logger.error(
            "Access denied. Try providing credentials with --username and --password."
        )
        for i in e.args:
            logger.debug(i)
        raise

    return image