#!/usr/bin/python
# -*- coding: utf-8 -*-
#   Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
#   Licensed under the Universal Permissive License v 1.0 as shown at https://opensource.org/licenses/UPL.

import glob
import os
import re
import shutil
import socket
import sys

sys.path.insert(0, '/usr/share/oracle-cloud-agent/plugins/osms')

from osms import cli
from osms import config
from osms import distro
from osms import transaction
from osms import utils
from osms.i18n import sstr
from osms.server import OsmsServer


def get_distro_information():
    ts = transaction.initReadOnlyTransaction()
    for release_package in ["oraclelinux-release", "redhat-release"]:
        for h in ts.dbMatch('Providename', release_package):
            sysrelver = 'system-release(releasever)'
            version = sstr(h['version'])
            release = sstr(h['release'])
            if sysrelver in h['providename']:
                provides = dict(zip(h['providename'], h['provideversion']))
                release = '%s-%s' % (version, release)
                version = provides[sysrelver]
            return sstr(h['name']), version, release
    raise Exception('Could not get OS distro informaton')


def disable_plugin():
    utils.update_file('/etc/yum/pluginconf.d/osmsplugin.conf', 'enabled = 1', 'enabled = 0')


def enable_plugin():
    utils.update_file('/etc/yum/pluginconf.d/osmsplugin.conf', 'enabled = 0', 'enabled = 1')


def backup_yum_repos():
    ignored_repo_files = []
    try:
        with open('/etc/oracle-cloud-agent/plugins/osms/ignored_repos.conf') as fobj:
            ignored_repo_files = fobj.read().splitlines()
    except IOError:
        # Ignore all errors, ie, fall back to normal operations
        pass
    for repo in glob.glob('/etc/yum.repos.d/*.repo'):
        if os.path.basename(repo) not in ignored_repo_files:
            shutil.move(repo, repo + '.osms-backup')


def restore_yum_repos():
    for repo in glob.glob('/etc/yum.repos.d/*.repo.osms-backup'):
        shutil.move(repo, re.sub(r'\.osms-backup$', '', repo))


def self_test(args=None):
    endpoint = None if not hasattr(args, 'server_url') else args.server_url

    self_tester = cli.SelfTest.create(endpoint)
    self_tester.run()


def check(args=None):
    backup_yum_repos()
    enable_plugin()
    cli.Checker().run()


def register(args):
    cfg = config.initUp2dateConfig()
    cfg.set('serverURL', args.server_url)
    package_list = distro.get_installed_package_list()
    instance_ocid = utils.get_instance_ocid()
    profile_name = socket.gethostname() or instance_ocid
    release_name, os_release, _ = get_distro_information()
    is_alx = utils.is_alx()
    if is_alx:
        autonomous_linux = '1'
    else:
        autonomous_linux = '0'
    auth_dict = {
        'profile_name': profile_name,
        'os_release': os_release,
        'release_name': release_name,
        'architecture': os.uname()[4],
        'ocid': instance_ocid,
        'autonomous_linux': autonomous_linux,
    }
    if args.activation_key:
        auth_dict['token'] = args.activation_key
    server = OsmsServer()
    system_id = server.registration.new_system(auth_dict)
    server.registration.add_packages(system_id, package_list)
    utils.create_file(cfg['systemIdPath'], sstr(system_id))
    cfg.save()
    backup_yum_repos()
    enable_plugin()


def unregister(args):
    utils.remove_system_id_file()
    utils.set_default_server_url()
    disable_plugin()
    restore_yum_repos()


CMDS = {
    'check': {
        'func': check,
        'help': 'Check for actions',
    },
    'register': {
        'func': register,
        'help': 'Register a system',
        'args': [
            [['--server-url'], {'help': 'server url', 'required': True}],
            [['--activation-key'], {'help': 'activation key'}],
        ],
    },
    'unregister': {
        'func': unregister,
        'help': 'Unregister a system',
    },
        'test': {
            'func': self_test,
            'help': 'perform a self test to check that OSMS is correctly configured',
            'args': [
                [['--server-url'], {'help': 'server url to use for service'}],
            ]
        },
}


if __name__ == '__main__':
    cli.main(CMDS)