from __future__ import (absolute_import, division, print_function)
__metaclass__ = type

from ansible import errors


def kubeguard_direct_net_zone(data, myname, peer):
    try:
        zones = []
        for zone in data:
            if myname in data[zone]['node_interface'] and peer in data[zone]['node_interface']:
                zones.append(zone)

        if not zones:
            return ""
        if len(zones) > 1:
            raise errors.AnsibleFilterError("host '%s' and '%s' have multiple direct net zones in common: %s" %
                                            (myname, peer, zones.join(',')))
        return zones[0]

    except Exception as e:
        raise errors.AnsibleFilterError("kubeguard_direct_net_zones(): %s" % str(e))


class FilterModule(object):

    ''' Kubeguard Network Filters '''
    filter_map = {
        'kubeguard_direct_net_zone': kubeguard_direct_net_zone,
    }

    def filters(self):
        return self.filter_map