#
# steering, Programme/schedule management for AURA
#
# Copyright (C) 2011-2017, 2020, Ernesto Rico Schmidt
# Copyright (C) 2017-2019, Ingo Leindecker
#
# 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 json
from datetime import datetime, date, timedelta
from os.path import join

from django.conf import settings


def get_cached_shows():
    cache_dir = getattr(settings, 'AUTOMATION_CACHE_DIR', 'cache')
    cached_shows = join(cache_dir, 'shows.json')
    with open(cached_shows) as shows_json:
        shows = json.loads(shows_json.read())

    return shows


def tofirstdayinisoweek(year, week):
    # http://stackoverflow.com/questions/5882405/get-date-from-iso-week-number-in-python
    ret = datetime.strptime('%04d-%02d-1' % (year, week), '%Y-%W-%w')
    if date(year, 1, 4).isoweekday() > 4:
        ret -= timedelta(days=7)
    return ret