#!/usr/bin/python
# vim: set fileencoding=utf-8 tw=90 :

import os
import sys
import datetime
import argparse
import logging

# django setup
DJANGO_SETTINGS_MODULE = 'settings'
DJANGO_PROJECT_PATH = os.path.dirname(sys.argv[0]) + '/web'
sys.path.insert(1, DJANGO_PROJECT_PATH)
os.environ['DJANGO_SETTINGS_MODULE'] = DJANGO_SETTINGS_MODULE
from web.postkey.models import i2phost

# parse command line options
parser = argparse.ArgumentParser(
		description='Hosts maintainer for py-i2phosts.',
		epilog='Report bugs to http://zzz.i2p/topics/733')
parser.add_argument('-d', '--debug', action='store_true',
		help='enable debug messages')
args = parser.parse_args()

# configure logger
log = logging.getLogger(sys.argv[0])
handler = logging.StreamHandler()
log.addHandler(handler)
if args.debug:
	log.setLevel(logging.DEBUG)
else:
	log.setLevel(logging.INFO)


all_hosts = i2phost.objects.all()
for host in all_hosts:
	# how long host was added
	dl = datetime.datetime.now() - host.date_added
	if host.last_seen == None:
		# delete external hosts which we never seen after 365 days of inactivity
		if host.external == True:
			if dl > datetime.timedelta(days=365):
				log.info('deleting %s, reason: external host, never seen for 365 days', host.name)
				host.delete()
				continue
		# delete hosts added by us and never seen after 14 days of inactivity
		else:
			if dl > datetime.timedelta(days=14):
				log.info('deleting %s, reason: internal host, never seen for 14 days', host.name)
				host.delete()
				continue
	else:
		# configure registration period for hosts
		# FIXME: make intervals configurable via config or/and commandline
		if host.external == True:
			timedelta = datetime.timedelta(days=30)
		else:
			timedelta = datetime.timedelta(days=60)
		# get current host expiration date from database
		expires_current = host.expires
		# calculate new expiration date
		expires_new = host.last_seen + timedelta
		expires_new = expires_new.date()
		# update expiration date only if changed
		if expires_new > expires_current:
			log.debug('updating expires for %s', host.name)
			host.expires = expires_new
		# deactivate if expired
		if host.expires < datetime.datetime.now().date():
			log.info('deactivating %s, reason: expired', host.name)
			host.activated = False
		# if not expired and added more than 3 days ago then activate
		elif dl > datetime.timedelta(days=3) and host.activated == False:
			log.info('activating %s, reason: host up and added more than 3 days ago', host.name)
			host.activated = True
		# if expired two years ago then delete
		dl_e = datetime.datetime.now().date() - host.expires
		if dl_e > datetime.timedelta(days=730):
			log.info('deleting %s, reason: expired 2 years ago', host.name)
			host.delete()
			continue
		host.save()