#!/usr/bin/env python3
# Copyright 2015-2021 Canonical, Ltd.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

import os
import logging
import subprocess

log = logging.getLogger("subiquity.system_setup.common.wsl_utils")


def is_reconfigure(is_dryrun):
    if is_dryrun and \
                 os.getenv("DRYRUN_RECONFIG") == "true":
        return True
    if_normaluser = False
    with open('/etc/passwd', 'r') as f:
        for line in f:
            # check every normal user except nobody (65534)
            if int(line.split(':')[2]) >= 1000 and \
               int(line.split(':')[2]) != 65534:
                if_normaluser = True
                break
    return not is_dryrun and if_normaluser


def get_windows_locale():
    windows_locale_failed_msg = (
        "Cannot determine Windows locale, fallback to default."
        " Reason of failure: "
    )

    try:
        process = subprocess.run(["powershell.exe", "-NonInteractive",
                                  "-NoProfile", "-Command",
                                  "(Get-Culture).Name"],
                                 stdout=subprocess.PIPE,
                                 stderr=subprocess.PIPE)
        if process.returncode:
            log.info(windows_locale_failed_msg +
                     process.stderr.decode("utf-8"))
            return None

        tmp_code = process.stdout.rstrip().decode("utf-8")
        tmp_code = tmp_code.replace("-", "_")
        return tmp_code
    except OSError as e:
        log.info(windows_locale_failed_msg + e.strerror)
        return None


def get_userandgroups():
    from subiquity.common.resources import resource_path
    from subiquitycore.utils import run_command

    users_and_groups_path = resource_path('users-and-groups')
    if os.path.exists(users_and_groups_path):
        groups = open(users_and_groups_path).read().split()
    else:
        groups = ['admin']
    groups.append('sudo')

    command = ['getent', 'group']
    cp = run_command(command, check=True)
    target_groups = set()
    for line in cp.stdout.splitlines():
        target_groups.add(line.split(':')[0])

    groups = [group for group in groups if group in target_groups]
    oneline_usergroups = ",".join(groups)
    return oneline_usergroups


def convert_if_bool(value):
    if value.lower() in ('true', 'false'):
        return value.lower() == 'true'
    return value