#!/usr/local/bin/python2
#
# Copyright (c) 2017-2018  Joe Clarke <jclarke@cisco.com>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.


import requests
from requests.packages.urllib3.exceptions import InsecureRequestWarning

requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
import sys
import re
import CLEUCreds

DNS_BASE = 'https://dc1-dns.ciscolive.local:8443/web-services/rest/resource/'
DOMAIN_ORIG = 'ciscolive.local'
DOMAIN_NEW = 'ciscolive.network'

HEADERS = {
    'authorization': CLEUCreds.JCLARKE_BASIC,
    'accept': 'application/json',
    'content-type': 'application/json'
}

if __name__ == '__main__':
    url = DNS_BASE + 'CCMHost'

    try:
        response = requests.request(
            'GET', url, params={'zoneOrigin': DOMAIN_ORIG}, headers=HEADERS, verify=False)
        response.raise_for_status()
    except Exception as e:
        sys.stderr.write(
            'Failed to get hosts from {}: {}\n'.format(DOMAIN_ORIG, e))
        sys.exit(1)

    hosts = []

    for host in response.json():
        hosts.append(host['name'])
        if 'aliases' in host and 'stringItem' in host['aliases']:
            hosts += host['aliases']['stringItem']

    for host in hosts:
        hname = host.replace('.{}.'.format(DOMAIN_ORIG), '')
        hname = host.replace('.', '')
        if re.search(r'{}\.$'.format(DOMAIN_NEW), hname):
            continue

        url = DNS_BASE + 'CCMRRSet/{}'.format(hname)

        try:
            response = requests.request('PUT', url, json={'name': hname, 'rrs': {'stringItem': [
                                        'IN CNAME {}.{}.'.format(hname, DOMAIN_ORIG)]}, 'zoneOrigin': '{}.'.format(DOMAIN_NEW)}, headers=HEADERS, verify=False)
            response.raise_for_status()
        except Exception as e:
            sys.stderr.write(
                'Failed to add alias for {}: {}\n'.format(hname, e))