from flask import request
from IPy import IP
import ddns.backend.dnsupdate
import ddns.auth
import ddns.cfg_parser

@ddns.auth.require_auth
def dyn_com():
	if request.method != 'GET':
		return "badagent"

	if not request.args.has_key('hostname'):
		return "nohost"

	if len(request.args.getlist('hostname')) > 1:
		return "numhost"

	if not request.args.has_key('myip'):
		return "nohost"

	if len(request.args.getlist('myip')) != 1:
		return "nohost"

	hostname = request.args.get('hostname')
	if not '.' in hostname:
		return "notfqdn"

	zone_name = hostname[hostname.find('.')+1:]
	if zone_name[-1] != '.':
		zone_name += '.'

	hostname = hostname[0:hostname.find('.')]

	try:
		ip = IP(request.args.get('myip'))
	except ValueError:
		return "nohost"

	for zone in ddns.cfg_parser.cfg['zones']:
		if zone_name == zone['name']:
			for domain in zone['domains']:
				if domain['domain'] == hostname:
					if request.authorization.username in users:
						ddns.backend.dnsupdate.update_dns(zone_name, hostname, ip)
						# We should probably check something here...
						return "good"
					return auth.authenticate("!yours")
			return "nohost"
	return "nohost"