################################################################################
# Copyright (c) 2015-2019 Skymind, Inc.
#
# This program and the accompanying materials are made available under the
# terms of the Apache License, Version 2.0 which is available at
# https://www.apache.org/licenses/LICENSE-2.0.
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#
# SPDX-License-Identifier: Apache-2.0
################################################################################

from .downloader import download as download_file
import requests


_cache = {}


def _read(url):
    text = _cache.get(url)
    if text is None:
        text = requests.get(url).text
        if not text:
            raise Exception('Empty response. Check connectivity.')
        _cache[url] = text
    return text


def _parse_contents(text):
    contents = text.split('<pre id="contents">')[1]
    contents = contents.split('</pre>')[0]
    contents = contents.split('<a href="')
    _ = contents.pop(0)
    link_to_parent = contents.pop(0)
    contents = list(map(lambda x: x.split('"')[0], contents))
    contents = [c[:-1]
                for c in contents if c[-1] == '/']  # removes meta data files
    return contents


def get_artifacts(group):
    url = ('https://search.maven.org/remotecontent?filepath=' +
           'org/{}/'.format(group))
    response = _read(url)
    return _parse_contents(response)


def get_versions(group, artifact):
    url = ('https://search.maven.org/remotecontent?filepath=' +
           'org/{}/{}/'.format(group, artifact))
    response = _read(url)
    return _parse_contents(response)


def get_latest_version(group, artifact):
    return get_versions(group, artifact)[-1]


def get_jar_url(group, artifact, version=None):
    if version is None:
        version = get_versions(group, artifact)[-1]
    url = ('http://search.maven.org/remotecontent?filepath=' +
           'org/{}/{}/{}/{}-{}.jar'.format(group, artifact, version,
                                           artifact, version))
    return url