# Copyright 2020 Spirent Communications.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#   http://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.

"""
Airship implementation of Software Predeployment Validation
"""

import os
import shutil
from pathlib import Path
import git
import urllib3
from conf import settings
from SoftwarePreUrlsValid import swpreurlsvalidator


def check_link(link):
    """
    Function the check the availability of Hyperlinks
    """
    timeout = urllib3.util.Timeout(connect=5.0, read=7.0)
    http = urllib3.PoolManager(timeout=timeout)
    try:
        http.request('HEAD', link)
    except urllib3.exceptions.LocationValueError as err:
        print(err.args)
        return False
    except urllib3.exceptions.MaxRetryError as err:
        print(err.args)
        return False
    except urllib3.exceptions.RequestError as err:
        print(err.args)
        return False
    except urllib3.exceptions.ConnectTimeoutError as err:
        print(err.args)
        return False
    except urllib3.exceptions.PoolError as err:
        print(err.args)
        return False
    except urllib3.exceptions.HTTPError as err:
        print(err.args)
        return False
    return True


class Airship(swpreurlsvalidator.ISwPreUrlsValidator):
    """
    Ariship Sw Validation
    """
    def __init__(self):
        """ Airship class constructor """
        super().__init__()
        self.url = settings.getValue('AIRSHIP_MANIFEST_URL')
        self.branch = settings.getValue('AIRSHIP_MANIFEST_BRANCH')
        self.dl_path = settings.getValue('AIRSHIP_MANIFEST_DOWNLOAD_PATH')
        self.site_name = settings.getValue('AIRSHIP_MANIFEST_SITE_NAME')
        self.manifest = None
        self.dirpath = Path(self.dl_path, 'airship')
        self.tmdirpath = Path(self.dl_path, 'treasuremap')
        self.locations = []

    def clone_repo(self):
        """
        Cloning the repos
        """
        git.Repo.clone_from(self.url,
                            self.dirpath,
                            branch=self.branch)
        git.Repo.clone_from('https://github.com/airshipit/treasuremap',
                            self.tmdirpath,
                            branch=settings.getValue(
                                'AIRSHIP_TREASUREMAP_VERSION'))

    def cleanup_manifest(self):
        """
        Remove existing manifests
        """
        # Next Remove any manifest files, if it exists
        if self.dirpath.exists() and self.dirpath.is_dir():
            shutil.rmtree(self.dirpath)
        if self.tmdirpath.exists() and self.tmdirpath.is_dir():
            shutil.rmtree(self.tmdirpath)

    def manifest_exists_locally(self):
        """
        Check if manifests exists locally
        """
        if self.dirpath.exists() and self.dirpath.is_dir():
            return True
        return False

    def validate(self):
        """
        Hyperlink Validation
        """
        self.cleanup_manifest()
        # Next, clone the repo to the provided path.
        self.clone_repo()

        if self.dirpath.exists() and self.dirpath.is_dir():
            # Get the file(s) where links are defined.
            self.find_locations(
                os.path.join(self.dirpath, 'type',
                             'cntt', 'software',
                             'config', 'versions.yaml'))
            for location in self.locations:
                if check_link(location):
                    print("The Link: %s is VALID" % (location))
                else:
                    print("The Link: %s is INVALID" % (location))

    # pylint: disable=consider-using-enumerate
    def find_locations(self, yamlfile):
        """
        Find all the hyperlinks in the manifests
        """
        with open(yamlfile, 'r') as filep:
            lines = filep.readlines()
            for index in range(len(lines)):
                line = lines[index].strip()
                if line.startswith('location:'):
                    link = line.split(":", 1)[1]
                    if "opendev" in link:
                        if ((len(lines) > index+1) and
                                (lines[index+1].strip().startswith(
                                    'reference:'))):
                            ref = lines[index+1].split(":", 1)[1]
                            link = link + '/commit/' + ref.strip()
                    if link.strip() not in self.locations:
                        print(link)
                        self.locations.append(link.strip())
                if 'docker.' in line:
                    link = line.split(":", 1)[1]
                    link = link.replace('"', '')
                    parts = link.split('/')
                    if len(parts) == 3:
                        link = ('https://index.' +
                                parts[0].strip() +
                                '/v1/repositories/' +
                                parts[1] + '/' + parts[2].split(':')[0] +
                                '/tags/' + parts[2].split(':')[-1])
                        if link.strip() not in self.locations:
                            print(link)
                            self.locations.append(link.strip())