# -*- 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/>.
#

from __future__ import absolute_import, unicode_literals

from celery.schedules import crontab
from django.core.cache import cache
from django.core.checks import run_checks
from django.utils.timezone import now

from weblate.utils.celery import app
from weblate.wladmin.models import BackupService, ConfigurationError, SupportStatus


@app.task(trail=False)
def configuration_health_check(include_deployment_checks=True):
    # Fetch errors from cache, these are created from
    # code executed without apps ready
    for error in cache.get('configuration-errors', []):
        if 'delete' in error:
            ConfigurationError.objects.remove(error['name'])
        else:
            ConfigurationError.objects.add(
                error['name'],
                error['message'],
                error['timestamp'] if 'timestamp' in error else now(),
            )

    # Run deployment checks
    if not include_deployment_checks:
        return
    checks = {check.id: check for check in run_checks(include_deployment_checks=True)}
    criticals = {
        'weblate.E002',
        'weblate.E003',
        'weblate.E007',
        'weblate.E009',
        'weblate.E012',
        'weblate.E013',
        'weblate.E014',
        'weblate.E015',
        'weblate.E017',
        'weblate.E018',
        'weblate.E019',
        'weblate.C029',
        'weblate.C030',
        'weblate.C031',
    }
    for check_id in criticals:
        if check_id in checks:
            ConfigurationError.objects.add(check_id, checks[check_id].msg)
        else:
            ConfigurationError.objects.remove(check_id)


@app.task(trail=False)
def support_status_update():
    support = SupportStatus.objects.get_current()
    if support.secret:
        support.refresh()
        support.save()


@app.task(trail=False)
def backup():
    for service in BackupService.objects.filter(enabled=True):
        backup_service.delay(service.pk)


@app.task(trail=False)
def backup_service(pk):
    service = BackupService.objects.get(pk=pk)
    service.ensure_init()
    service.backup()
    service.prune()


@app.on_after_finalize.connect
def setup_periodic_tasks(sender, **kwargs):
    sender.add_periodic_task(
        3600, configuration_health_check.s(), name='configuration-health-check'
    )
    sender.add_periodic_task(
        24 * 3600, support_status_update.s(), name='support-status-update'
    )
    sender.add_periodic_task(crontab(hour=2, minute=0), backup.s(), name='backup')
