# -*- coding: utf-8 -*-
#
# Copyright © 2012 - 2020 Michal Čihař <michal@cihar.com>
#
# This file is part of Weblate <https://weblate.org/>
#
# This program 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.
#
# 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.
#

import platform

from django import db
from django.conf import settings
from django.core.management.base import BaseCommand

from weblate.utils.requirements import get_versions_list


class Command(BaseCommand):
    help = 'lists versions of required software components'

    def write_item(self, prefix, value):
        self.stdout.write(' * {}: {}'.format(prefix, value))

    def handle(self, *args, **options):
        """Print versions of dependencies."""
        for version in get_versions_list():
            self.write_item(version[0], version[2])
        self.write_item(
            'Database backends',
            ', '.join(conn['ENGINE'] for conn in db.connections.databases.values()),
        )
        self.write_item(
            'Cache backends',
            ', '.join(
                '{}:{}'.format(key, value['BACKEND'].split('.')[-1])
                for key, value in settings.CACHES.items()
            ),
        )
        self.write_item(
            'Email setup', '{}: {}'.format(settings.EMAIL_BACKEND, settings.EMAIL_HOST)
        )
        self.write_item(
            'Celery',
            '{}, {}, {}'.format(
                getattr(settings, 'CELERY_BROKER_URL', 'N/A'),
                getattr(settings, 'CELERY_RESULT_BACKEND', 'N/A'),
                'eager' if settings.CELERY_TASK_ALWAYS_EAGER else 'regular',
            ),
        )
        self.write_item(
            'Platform',
            '{} {} ({})'.format(
                platform.system(), platform.release(), platform.machine()
            ),
        )
