# Copyright (C) 2010-2020 RhodeCode GmbH
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License, version 3
# (only), as published by the Free Software Foundation.
#
# 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 Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# This program is dual-licensed. If you wish to learn more about the
# RhodeCode Enterprise Edition, including its added features, Support services,
# and proprietary license terms, please see https://rhodecode.com/licenses/

import os
import json
import logging
import datetime
import time

from functools import partial

import configparser
from celery.result import AsyncResult
import celery.loaders.base
import celery.schedules

log = logging.getLogger(__name__)


def get_task_id(task):
    task_id = None
    if isinstance(task, AsyncResult):
        task_id = task.task_id

    return task_id


def crontab(value):
    return celery.schedules.crontab(**value)


def timedelta(value):
    return datetime.timedelta(**value)


def safe_json(get, section, key):
    value = ''
    try:
        value = get(key)
        json_value = json.loads(value)
    except ValueError:
        msg = 'The %s=%s is not valid json in section %s' % (
            key, value, section
        )
        raise ValueError(msg)

    return json_value


def raw_2_schedule(schedule_value, schedule_type):
    schedule_type_map = {
        'crontab': crontab,
        'timedelta': timedelta,
        'integer': int
    }
    scheduler_cls = schedule_type_map.get(schedule_type)

    if scheduler_cls is None:
        raise ValueError(
            'schedule type %s in section is invalid' % (
                schedule_type,
            )
        )
    try:
        schedule = scheduler_cls(schedule_value)
    except TypeError:
        log.exception('Failed to compose a schedule from value: %r', schedule_value)
        schedule = None
    return schedule


def get_beat_config(parser, section):

    get = partial(parser.get, section)
    has_option = partial(parser.has_option, section)

    schedule_type = get('type')
    schedule_value = safe_json(get, section, 'schedule')

    config = {
        'schedule_type': schedule_type,
        'schedule_value': schedule_value,
        'task': get('task'),
    }
    schedule = raw_2_schedule(schedule_value, schedule_type)
    if schedule:
        config['schedule'] = schedule

    if has_option('args'):
        config['args'] = safe_json(get, section, 'args')

    if has_option('kwargs'):
        config['kwargs'] = safe_json(get, section, 'kwargs')

    if has_option('force_update'):
        config['force_update'] = get('force_update')

    return config


def parse_ini_vars(ini_vars):
    options = {}
    for pairs in ini_vars.split(','):
        key, value = pairs.split('=')
        options[key] = value
    return options


def ping_db():
    from rhodecode.model import meta
    from rhodecode.model.db import DbMigrateVersion
    log.info('Testing DB connection...')

    for test in range(10):
        try:
            scalar = DbMigrateVersion.query().scalar()
            log.debug('DB PING %s@%s', scalar, scalar.version)
            break
        except Exception:
            retry = 1
            log.debug('DB not ready, next try in %ss', retry)
            time.sleep(retry)
        finally:
            meta.Session.remove()