#!/usr/bin/env python3

import datetime, itertools, os, re

now = datetime.datetime.now(datetime.timezone.utc)
max_backup_delay = datetime.timedelta(1, 7200)

def get_name(match):
    return match.group('name')

def check_backup(filename):
    with open(filename) as f:
        logs = f.read()
        mixed_statuses = list(re.finditer(r'(?P<status>Succeeded|Failed) (?P<name>\w+) backup at (?P<date>\d\d\d\d-\d\d-\d\dT\d\d:\d\d:\d\d\+\d\d:\d\d)$', logs, re.MULTILINE))
        for name, statuses in itertools.groupby(sorted(mixed_statuses, key=get_name), key=get_name):
            last = sorted(statuses, key=lambda x: x.group('date'))[-1]
            print('{name}: {status} at {date}'.format(**last.groupdict()))
            last_date = datetime.datetime.fromisoformat(last.group('date'))
            last_status = last.group('status')
            if last_status != 'Succeeded' or now - last_date > max_backup_delay:
                failure.append(name)

failure = []
try:
    check_backup ("/var/log/borgmatic.log")
except Exception:
    check_backup ("/var/log/borgmatic.log.1")

if failure:
    exit (1)
else:
    exit (0)