#!/usr/bin/env python
import click
import click_config_file
import requests
import dns.resolver
import tldextract

from lib.directadmin import DirectAdminClient, DirectAdminClientException


def get_zone_and_name(record_domain):
    """Find a suitable zone for a domain
    :param str record_name: the domain name
    :returns: (the zone, the name in the zone)
    :rtype: tuple
    """
    (subdomain, domain, suffix) = tldextract.extract(record_domain)

    directadmin_zone = ".".join((domain, suffix))
    directadmin_name = subdomain

    return directadmin_zone, directadmin_name


def get_directadmin_client(url, username, password):
    return DirectAdminClient(
        url,
        username,
        password)


def getipv6(hostname):
    answers = dns.resolver.query(hostname, 'AAAA')
    for ip in answers:
        return str(ip).strip()


def getipv4(hostname):
    answers = dns.resolver.query(hostname, 'A')
    for ip in answers:
        return str(ip).strip()



@click.command()
@click_config_file.configuration_option()
@click.option('--hostname', help='The FQDN you wish to update for DynamicDNS on DirectAdmin server')
@click.option('--url', help='The FQDN to access DirectAdmin server e.g https://my.directadmin.com:2222')
@click.option('--username', help='The username for your account on DirectAdmin server')
@click.option('--password', help='The password for your account on DirectAdmin server')
def ddns_updater(hostname, url, username, password):
    click.echo('Updating DNS for ' + hostname)
    (directadmin_zone, directadmin_name) = get_zone_and_name(hostname)

    da_client = ""
    try:
        da_client = get_directadmin_client(url, username, password)
    except DirectAdminClientException as e:
        click.echo(e)
        exit(1)
    current_ip4 = requests.get('http://icanhazip.com').text.strip()
    # current_ip6 = requests.get('http://ip1.dynupdate6.no-ip.com').text.strip()
    hostname_resolves_to_ip4 = getipv4(hostname)
    # hostname_resolves_to_ip6 = getipv6(hostname)

    click.echo("Current External IP: {}".format(current_ip4))
    click.echo("Hostname resolves to: {}".format(hostname_resolves_to_ip4))

    # click.echo("Current External IP6: {}".format(current_ip6))
    # click.echo("Hostname resolves to: {}".format(hostname_resolves_to_ip6))

    if current_ip4 != hostname_resolves_to_ip4:
        click.echo("Current V4 IP has changed, updating...")
        try:
            response = da_client.update_dns_record(directadmin_zone,
                                                   "A",
                                                   directadmin_name,
                                                   hostname_resolves_to_ip4,
                                                   current_ip4, 30)
            if int(response['error']) == 0:
                click.echo("Successfully updated A record for " + hostname)
        except DirectAdminClientException as e:
            click.echo("Error updating A record: %s" % e)
    #
    # if current_ip6 != hostname_resolves_to_ip6:
    #     click.echo("Current V6 IP has changed, updating...")
    #     try:
    #         response = da_client.update_dns_record(directadmin_zone,
    #                                                "AAAA",
    #                                                directadmin_name,
    #                                                hostname_resolves_to_ip6,
    #                                                current_ip6, 30)
    #         if int(response['error']) == 0:
    #             click.echo("Successfully updated AAAA record for " + hostname)
    #     except DirectAdminClientException as e:
    #         click.echo("Error updating AAAA record: %s" % e)


if __name__ == '__main__':
    ddns_updater()