#! /opt/mailman/mm/venv/bin/python

# Copyright (C) 2022 by the Free Software Foundation, Inc.
#
# 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 2
# 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, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
# USA.

"""This deletes archived messages from HyperKitty with dates older than
that supplied as it's argument.
"""
import os
import sys
import django
from datetime import datetime, timezone

sys.path.insert(0, '/opt/mailman/mm')
os.environ['DJANGO_SETTINGS_MODULE'] = 'settings'

django.setup()
from hyperkitty.models.email import Email

def usage():
    print(f'Usage: {sys.argv[0]} yyyy-mm-dd', file=sys.stderr)
    sys.exit(1)

if len(sys.argv) != 2:
    usage()
try:
    year, month, day = sys.argv[1].split('-')
except ValueError:
    usage()
try:
    cutoff = datetime(int(year), int(month), int(day), tzinfo=timezone.utc)
except (TypeError, ValueError):
    usage()

count = 0
for msg in Email.objects.filter(date__lt=cutoff):
    msg.delete()
    count += 1
print(f'Deleted {count} messages')