# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance withv
# the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

try:
    from lxml import etree as ET
except ImportError:
    from xml.etree import ElementTree as ET

from libcloud.common.dimensiondata import DimensionDataConnection
from libcloud.common.dimensiondata import DimensionDataPool
from libcloud.common.dimensiondata import DimensionDataPoolMember
from libcloud.common.dimensiondata import DimensionDataVirtualListener
from libcloud.common.dimensiondata import DimensionDataVIPNode
from libcloud.common.dimensiondata import DimensionDataDefaultHealthMonitor
from libcloud.common.dimensiondata import DimensionDataPersistenceProfile
from libcloud.common.dimensiondata import \
    DimensionDataVirtualListenerCompatibility
from libcloud.common.dimensiondata import DimensionDataDefaultiRule
from libcloud.common.dimensiondata import API_ENDPOINTS
from libcloud.common.dimensiondata import DEFAULT_REGION
from libcloud.common.dimensiondata import TYPES_URN
from libcloud.utils.misc import reverse_dict
from libcloud.utils.xml import fixxpath, findtext, findall
from libcloud.loadbalancer.types import State
from libcloud.loadbalancer.base import Algorithm, Driver, LoadBalancer
from libcloud.loadbalancer.base import Member
from libcloud.loadbalancer.types import Provider


class DimensionDataLBDriver(Driver):
    """
    DimensionData node driver.
    """

    selected_region = None
    connectionCls = DimensionDataConnection
    name = 'Dimension Data Load Balancer'
    website = 'https://cloud.dimensiondata.com/'
    type = Provider.DIMENSIONDATA
    api_version = 1.0

    network_domain_id = None

    _VALUE_TO_ALGORITHM_MAP = {
        'ROUND_ROBIN': Algorithm.ROUND_ROBIN,
        'LEAST_CONNECTIONS': Algorithm.LEAST_CONNECTIONS,
        'SHORTEST_RESPONSE': Algorithm.SHORTEST_RESPONSE,
        'PERSISTENT_IP': Algorithm.PERSISTENT_IP
    }
    _ALGORITHM_TO_VALUE_MAP = reverse_dict(_VALUE_TO_ALGORITHM_MAP)

    _VALUE_TO_STATE_MAP = {
        'NORMAL': State.RUNNING,
        'PENDING_ADD': State.PENDING,
        'PENDING_CHANGE': State.PENDING,
        'PENDING_DELETE': State.PENDING,
        'FAILED_ADD': State.ERROR,
        'FAILED_CHANGE': State.ERROR,
        'FAILED_DELETE': State.ERROR,
        'REQUIRES_SUPPORT': State.ERROR
    }

    def __init__(self, key, secret=None, secure=True, host=None, port=None,
                 api_version=None, region=DEFAULT_REGION, **kwargs):

        if region not in API_ENDPOINTS:
            raise ValueError('Invalid region: %s' % (region))

        self.selected_region = API_ENDPOINTS[region]

        super(DimensionDataLBDriver, self).__init__(key=key, secret=secret,
                                                    secure=secure, host=host,
                                                    port=port,
                                                    api_version=api_version,
                                                    region=region,
                                                    **kwargs)

    def _ex_connection_class_kwargs(self):
        """
            Add the region to the kwargs before the connection is instantiated
        """

        kwargs = super(DimensionDataLBDriver,
                       self)._ex_connection_class_kwargs()
        kwargs['region'] = self.selected_region
        return kwargs

    def create_balancer(self, name, port, protocol, algorithm, members):
        """
        Create a new load balancer instance

        :param name: Name of the new load balancer (required)
        :type  name: ``str``

        :param port: Port the load balancer should listen on,
                    defaults to 80 (required)
        :type  port: ``str``

        :param protocol: Loadbalancer protocol, defaults to http.
        :type  protocol: ``str``

        :param members: list of Members to attach to balancer (optional)
        :type  members: ``list`` of :class:`Member`

        :param algorithm: Load balancing algorithm, defaults to ROUND_ROBIN.
        :type algorithm: :class:`.Algorithm`

        :rtype: :class:`LoadBalancer`
        """
        network_domain_id = self.network_domain_id
        if port is None:
            port = 80
        if protocol is None:
            protocol = 'http'
        if algorithm is None:
            algorithm = Algorithm.ROUND_ROBIN

        # Create a pool first
        pool = self.ex_create_pool(
            network_domain_id=network_domain_id,
            name=name,
            ex_description=None,
            balancer_method=self._ALGORITHM_TO_VALUE_MAP[algorithm])

        # Attach the members to the pool as nodes
        if members is not None:
            for member in members:
                node = self.ex_create_node(
                    network_domain_id=network_domain_id,
                    name=member.ip,
                    ip=member.ip,
                    ex_description=None)
                self.ex_create_pool_member(
                    pool=pool,
                    node=node,
                    port=port)

        # Create the virtual listener (balancer)
        listener = self.ex_create_virtual_listener(
            network_domain_id=network_domain_id,
            name=name,
            ex_description=name,
            port=port,
            pool=pool)

        return LoadBalancer(
            id=listener.id,
            name=listener.name,
            state=State.RUNNING,
            ip=listener.ip,
            port=port,
            driver=self,
            extra={'pool_id': pool.id,
                   'network_domain_id': network_domain_id}
        )

    def list_balancers(self):
        """
        List all loadbalancers inside a geography.

        In Dimension Data terminology these are known as virtual listeners

        :rtype: ``list`` of :class:`LoadBalancer`
        """

        return self._to_balancers(
            self.connection
            .request_with_orgId_api_2('networkDomainVip/virtualListener')
            .object)

    def get_balancer(self, balancer_id):
        """
        Return a :class:`LoadBalancer` object.

        :param balancer_id: id of a load balancer you want to fetch
        :type  balancer_id: ``str``

        :rtype: :class:`LoadBalancer`
        """

        bal = self.connection \
            .request_with_orgId_api_2('networkDomainVip/virtualListener/%s'
                                      % balancer_id).object
        return self._to_balancer(bal)

    def list_protocols(self):
        """
        Return a list of supported protocols.

        Since all protocols are support by Dimension Data, this is a list
        of common protocols.

        :rtype: ``list`` of ``str``
        """
        return ['http', 'https', 'tcp', 'udp']

    def balancer_list_members(self, balancer):
        """
        Return list of members attached to balancer.

        In Dimension Data terminology these are the members of the pools
        within a virtual listener.

        :param balancer: LoadBalancer which should be used
        :type  balancer: :class:`LoadBalancer`

        :rtype: ``list`` of :class:`Member`
        """
        pool_members = self.ex_get_pool_members(balancer.extra['pool_id'])
        members = []
        for pool_member in pool_members:
            members.append(Member(
                id=pool_member.id,
                ip=pool_member.ip,
                port=pool_member.port,
                balancer=balancer,
                extra=None
            ))
        return members

    def balancer_attach_member(self, balancer, member):
        """
        Attach a member to balancer

        :param balancer: LoadBalancer which should be used
        :type  balancer: :class:`LoadBalancer`

        :param member: Member to join to the balancer
        :type member: :class:`Member`

        :return: Member after joining the balancer.
        :rtype: :class:`Member`
        """
        node = self.ex_create_node(
            network_domain_id=balancer.extra['network_domain_id'],
            name='Member.' + member.ip,
            ip=member.ip,
            ex_description=''
        )
        if node is False:
            return False
        pool = self.ex_get_pool(balancer.extra['pool_id'])
        pool_member = self.ex_create_pool_member(
            pool=pool,
            node=node,
            port=member.port)
        member.id = pool_member.id
        return member

    def balancer_detach_member(self, balancer, member):
        """
        Detach member from balancer

        :param balancer: LoadBalancer which should be used
        :type  balancer: :class:`LoadBalancer`

        :param member: Member which should be used
        :type member: :class:`Member`

        :return: ``True`` if member detach was successful, otherwise ``False``.
        :rtype: ``bool``
        """
        create_pool_m = ET.Element('removePoolMember', {'xmlns': TYPES_URN,
                                                        'id': member.id})

        result = self.connection.request_with_orgId_api_2(
            'networkDomainVip/removePoolMember',
            method='POST',
            data=ET.tostring(create_pool_m)).object
        response_code = findtext(result, 'responseCode', TYPES_URN)
        return response_code in ['IN_PROGRESS', 'OK']

    def destroy_balancer(self, balancer):
        """
        Destroy a load balancer (virtual listener)

        :param balancer: LoadBalancer which should be used
        :type  balancer: :class:`LoadBalancer`

        :return: ``True`` if the destroy was successful, otherwise ``False``.
        :rtype: ``bool``
        """
        delete_listener = ET.Element('deleteVirtualListener',
                                     {'xmlns': TYPES_URN,
                                      'id': balancer.id})

        result = self.connection.request_with_orgId_api_2(
            'networkDomainVip/deleteVirtualListener',
            method='POST',
            data=ET.tostring(delete_listener)).object
        response_code = findtext(result, 'responseCode', TYPES_URN)
        return response_code in ['IN_PROGRESS', 'OK']

    def ex_set_current_network_domain(self, network_domain_id):
        """
        Set the network domain (part of the network) of the driver

        :param network_domain_id: ID of the pool (required)
        :type  network_domain_id: ``str``
        """
        self.network_domain_id = network_domain_id

    def ex_get_current_network_domain(self):
        """
        Get the current network domain ID of the driver.

        :return: ID of the network domain
        :rtype: ``str``
        """
        return self.network_domain_id

    def ex_create_pool_member(self, pool, node, port):
        """
        Create a new member in an existing pool from an existing node

        :param pool: Instance of ``DimensionDataPool`` (required)
        :type  pool: ``DimensionDataPool``

        :param node: Instance of ``DimensionDataVIPNode`` (required)
        :type  node: ``DimensionDataVIPNode``

        :param port: Port the the service will listen on
        :type  port: ``str``

        :return: The node member, instance of ``DimensionDataPoolMember``
        :rtype: ``DimensionDataPoolMember``
        """
        create_pool_m = ET.Element('addPoolMember', {'xmlns': TYPES_URN})
        ET.SubElement(create_pool_m, "poolId").text = pool.id
        ET.SubElement(create_pool_m, "nodeId").text = node.id
        ET.SubElement(create_pool_m, "status").text = 'ENABLED'

        response = self.connection.request_with_orgId_api_2(
            'networkDomainVip/addPoolMember',
            method='POST',
            data=ET.tostring(create_pool_m)).object

        member_id = None
        node_name = None
        for info in findall(response, 'info', TYPES_URN):
            if info.get('name') == 'poolMemberId':
                member_id = info.get('value')
            if info.get('name') == 'nodeName':
                node_name = info.get('value')

        return DimensionDataPoolMember(
            id=member_id,
            name=node_name,
            status=State.RUNNING,
            ip=node.ip,
            port=port,
            node_id=node.id
        )

    def ex_create_node(self,
                       network_domain_id,
                       name,
                       ip,
                       ex_description,
                       connection_limit=25000,
                       connection_rate_limit=2000):
        """
        Create a new node

        :param network_domain_id: Network Domain ID (required)
        :type  name: ``str``

        :param name: name of the node (required)
        :type  name: ``str``

        :param ip: IPv4 address of the node (required)
        :type  ip: ``str``

        :param ex_description: Description of the node
        :type  ex_description: ``str``

        :param connection_limit: Maximum number
                of concurrent connections per sec
        :type  connection_limit: ``int``

        :param connection_rate_limit: Maximum number of concurrent sessions
        :type  connection_rate_limit: ``int``

        :return: Instance of ``DimensionDataVIPNode``
        :rtype: ``DimensionDataVIPNode``
        """
        create_node_elm = ET.Element('createNode', {'xmlns': TYPES_URN})
        ET.SubElement(create_node_elm, "networkDomainId") \
            .text = network_domain_id
        ET.SubElement(create_node_elm, "name").text = name
        ET.SubElement(create_node_elm, "description").text \
            = str(ex_description)
        ET.SubElement(create_node_elm, "ipv4Address").text = ip
        ET.SubElement(create_node_elm, "status").text = 'ENABLED'
        ET.SubElement(create_node_elm, "connectionLimit") \
            .text = str(connection_limit)
        ET.SubElement(create_node_elm, "connectionRateLimit") \
            .text = str(connection_rate_limit)

        response = self.connection.request_with_orgId_api_2(
            action='networkDomainVip/createNode',
            method='POST',
            data=ET.tostring(create_node_elm)).object

        node_id = None
        node_name = None
        for info in findall(response, 'info', TYPES_URN):
            if info.get('name') == 'nodeId':
                node_id = info.get('value')
            if info.get('name') == 'name':
                node_name = info.get('value')
        return DimensionDataVIPNode(
            id=node_id,
            name=node_name,
            status=State.RUNNING,
            ip=ip
        )

    def ex_update_node(self, node):
        """
        Update the properties of a node

        :param pool: The instance of ``DimensionDataNode`` to update
        :type  pool: ``DimensionDataNode``

        :return: The instance of ``DimensionDataNode``
        :rtype: ``DimensionDataNode``
        """
        create_node_elm = ET.Element('editNode', {'xmlns': TYPES_URN})
        ET.SubElement(create_node_elm, "connectionLimit") \
            .text = str(node.connection_limit)
        ET.SubElement(create_node_elm, "connectionRateLimit") \
            .text = str(node.connection_rate_limit)

        self.connection.request_with_orgId_api_2(
            action='networkDomainVip/createNode',
            method='POST',
            data=ET.tostring(create_node_elm)).object
        return node

    def ex_set_node_state(self, node, enabled):
        """
        Change the state of a node (enable/disable)

        :param pool: The instance of ``DimensionDataNode`` to update
        :type  pool: ``DimensionDataNode``

        :param enabled: The target state of the node
        :type  enabled: ``bool``

        :return: The instance of ``DimensionDataNode``
        :rtype: ``DimensionDataNode``
        """
        create_node_elm = ET.Element('editNode', {'xmlns': TYPES_URN})
        ET.SubElement(create_node_elm, "status") \
            .text = "ENABLED" if enabled is True else "DISABLED"

        self.connection.request_with_orgId_api_2(
            action='networkDomainVip/editNode',
            method='POST',
            data=ET.tostring(create_node_elm)).object
        return node

    def ex_create_pool(self,
                       network_domain_id,
                       name,
                       balancer_method,
                       ex_description,
                       health_monitors=None,
                       service_down_action='NONE',
                       slow_ramp_time=30):
        """
        Create a new pool

        :param network_domain_id: Network Domain ID (required)
        :type  name: ``str``

        :param name: name of the node (required)
        :type  name: ``str``

        :param balancer_method: The load balancer algorithm (required)
        :type  balancer_method: ``str``

        :param ex_description: Description of the node
        :type  ex_description: ``str``

        :param health_monitors: A list of health monitors to use for the pool.
        :type  health_monitors: ``list`` of
            :class:`DimensionDataDefaultHealthMonitor`

        :param service_down_action: What to do when node
                                    is unavailable NONE, DROP or RESELECT
        :type  service_down_action: ``str``

        :param slow_ramp_time: Number of seconds to stagger ramp up of nodes
        :type  slow_ramp_time: ``int``

        :return: Instance of ``DimensionDataPool``
        :rtype: ``DimensionDataPool``
        """
        # Names cannot contain spaces.
        name.replace(' ', '_')
        create_node_elm = ET.Element('createPool', {'xmlns': TYPES_URN})
        ET.SubElement(create_node_elm, "networkDomainId") \
            .text = network_domain_id
        ET.SubElement(create_node_elm, "name").text = name
        ET.SubElement(create_node_elm, "description").text \
            = str(ex_description)
        ET.SubElement(create_node_elm, "loadBalanceMethod") \
            .text = str(balancer_method)

        if health_monitors is not None:
            for monitor in health_monitors:
                ET.SubElement(create_node_elm, "healthMonitorId") \
                    .text = str(monitor.id)

        ET.SubElement(create_node_elm, "serviceDownAction") \
            .text = service_down_action
        ET.SubElement(create_node_elm, "slowRampTime").text \
            = str(slow_ramp_time)

        response = self.connection.request_with_orgId_api_2(
            action='networkDomainVip/createPool',
            method='POST',
            data=ET.tostring(create_node_elm)).object

        pool_id = None
        for info in findall(response, 'info', TYPES_URN):
            if info.get('name') == 'poolId':
                pool_id = info.get('value')

        return DimensionDataPool(
            id=pool_id,
            name=name,
            description=ex_description,
            status=State.RUNNING,
            load_balance_method=str(balancer_method),
            health_monitor_id=None,
            service_down_action=service_down_action,
            slow_ramp_time=str(slow_ramp_time)
        )

    def ex_create_virtual_listener(self,
                                   network_domain_id,
                                   name,
                                   ex_description,
                                   port,
                                   pool,
                                   persistence_profile=None,
                                   fallback_persistence_profile=None,
                                   irule=None,
                                   protocol='TCP',
                                   connection_limit=25000,
                                   connection_rate_limit=2000,
                                   source_port_preservation='PRESERVE'):
        """
        Create a new virtual listener (load balancer)

        :param network_domain_id: Network Domain ID (required)
        :type  name: ``str``

        :param name: name of the listener (required)
        :type  name: ``str``

        :param ex_description: Description of the node
        :type  ex_description: ``str``

        :param port: Description of the node
        :type  port: ``str``

        :param pool: The pool to use for the listener
        :type  pool: :class:`DimensionDataPool`

        :param persistence_profile: Persistence profile
        :type  persistence_profile: :class:`DimensionDataPersistenceProfile`

        :param fallback_persistence_profile: Fallback persistence profile
        :type  fallback_persistence_profile:
            :class:`DimensionDataPersistenceProfile`

        :param irule: The iRule to apply
        :type  irule: :class:`DimensionDataDefaultiRule`

        :param protocol: For STANDARD type, ANY, TCP or UDP
                         for PERFORMANCE_LAYER_4 choice of ANY, TCP, UDP, HTTP
        :type  protcol: ``str``

        :param connection_limit: Maximum number
                                of concurrent connections per sec
        :type  connection_limit: ``int``

        :param connection_rate_limit: Maximum number of concurrent sessions
        :type  connection_rate_limit: ``int``

        :param source_port_preservation: Choice of PRESERVE,
                                        PRESERVE_STRICT or CHANGE
        :type  source_port_preservation: ``str``

        :return: Instance of the listener
        :rtype: ``DimensionDataVirtualListener``
        """
        if port is 80 or 443:
            listener_type = 'PERFORMANCE_LAYER_4'
            protocol = 'HTTP'
        else:
            listener_type = 'STANDARD'

        create_node_elm = ET.Element('createVirtualListener',
                                     {'xmlns': TYPES_URN})
        ET.SubElement(create_node_elm, "networkDomainId") \
            .text = network_domain_id
        ET.SubElement(create_node_elm, "name").text = name
        ET.SubElement(create_node_elm, "description").text = \
            str(ex_description)
        ET.SubElement(create_node_elm, "type").text = listener_type
        ET.SubElement(create_node_elm, "protocol") \
            .text = protocol
        ET.SubElement(create_node_elm, "port").text = str(port)
        ET.SubElement(create_node_elm, "enabled").text = 'true'
        ET.SubElement(create_node_elm, "connectionLimit") \
            .text = str(connection_limit)
        ET.SubElement(create_node_elm, "connectionRateLimit") \
            .text = str(connection_rate_limit)
        ET.SubElement(create_node_elm, "sourcePortPreservation") \
            .text = source_port_preservation
        ET.SubElement(create_node_elm, "poolId") \
            .text = pool.id
        if persistence_profile is not None:
            ET.SubElement(create_node_elm, "persistenceProfileId") \
                .text = persistence_profile.id
        if fallback_persistence_profile is not None:
            ET.SubElement(create_node_elm, "fallbackPersistenceProfileId") \
                .text = fallback_persistence_profile.id
        if irule is not None:
            ET.SubElement(create_node_elm, "iruleId") \
                .text = irule.id

        response = self.connection.request_with_orgId_api_2(
            action='networkDomainVip/createVirtualListener',
            method='POST',
            data=ET.tostring(create_node_elm)).object

        virtual_listener_id = None
        virtual_listener_ip = None
        for info in findall(response, 'info', TYPES_URN):
            if info.get('name') == 'virtualListenerId':
                virtual_listener_id = info.get('value')
            if info.get('name') == 'listenerIpAddress':
                virtual_listener_ip = info.get('value')

        return DimensionDataVirtualListener(
            id=virtual_listener_id,
            name=name,
            ip=virtual_listener_ip,
            status=State.RUNNING
        )

    def ex_get_pools(self):
        """
        Get all of the pools inside the current geography

        :return: Returns a ``list`` of type ``DimensionDataPool``
        :rtype: ``list`` of ``DimensionDataPool``
        """
        pools = self.connection \
            .request_with_orgId_api_2('networkDomainVip/pool').object
        return self._to_pools(pools)

    def ex_get_pool(self, pool_id):
        """
        Get a specific pool inside the current geography

        :param pool_id: The identifier of the pool
        :type  pool_id: ``str``

        :return: Returns an instance of ``DimensionDataPool``
        :rtype: ``DimensionDataPool``
        """
        pool = self.connection \
            .request_with_orgId_api_2('networkDomainVip/pool/%s'
                                      % pool_id).object
        return self._to_pool(pool)

    def ex_update_pool(self, pool):
        """
        Update the properties of an existing pool
        only method, serviceDownAction and slowRampTime are updated

        :param pool: The instance of ``DimensionDataPool`` to update
        :type  pool: ``DimensionDataPool``

        :return: ``True`` for success, ``False`` for failure
        :rtype: ``bool``
        """
        create_node_elm = ET.Element('editPool', {'xmlns': TYPES_URN})

        ET.SubElement(create_node_elm, "loadBalanceMethod") \
            .text = str(pool.load_balance_method)
        ET.SubElement(create_node_elm, "serviceDownAction") \
            .text = pool.service_down_action
        ET.SubElement(create_node_elm, "slowRampTime").text \
            = str(pool.slow_ramp_time)

        response = self.connection.request_with_orgId_api_2(
            action='networkDomainVip/editPool',
            method='POST',
            data=ET.tostring(create_node_elm)).object
        response_code = findtext(response, 'responseCode', TYPES_URN)
        return response_code in ['IN_PROGRESS', 'OK']

    def ex_destroy_pool(self, pool):
        """
        Destroy an existing pool

        :param pool: The instance of ``DimensionDataPool`` to destroy
        :type  pool: ``DimensionDataPool``

        :return: ``True`` for success, ``False`` for failure
        :rtype: ``bool``
        """
        destroy_request = ET.Element('deletePool',
                                     {'xmlns': TYPES_URN,
                                      'id': pool.id})

        result = self.connection.request_with_orgId_api_2(
            action='networkDomainVip/deletePool',
            method='POST',
            data=ET.tostring(destroy_request)).object
        response_code = findtext(result, 'responseCode', TYPES_URN)
        return response_code in ['IN_PROGRESS', 'OK']

    def ex_get_pool_members(self, pool_id):
        """
        Get the members of a pool

        :param pool: The instance of a pool
        :type  pool: ``DimensionDataPool``

        :return: Returns an ``list`` of ``DimensionDataPoolMember``
        :rtype: ``list`` of ``DimensionDataPoolMember``
        """
        members = self.connection \
            .request_with_orgId_api_2('networkDomainVip/poolMember?poolId=%s'
                                      % pool_id).object
        return self._to_members(members)

    def ex_get_pool_member(self, pool_member_id):
        """
        Get a specific member of a pool

        :param pool: The id of a pool member
        :type  pool: ``str``

        :return: Returns an instance of ``DimensionDataPoolMember``
        :rtype: ``DimensionDataPoolMember``
        """
        member = self.connection \
            .request_with_orgId_api_2('networkDomainVip/poolMember/%s'
                                      % pool_member_id).object
        return self._to_member(member)

    def ex_set_pool_member_state(self, member, enabled=True):
        request = ET.Element('editPoolMember',
                             {'xmlns': TYPES_URN,
                              'id': member.id})
        state = "ENABLED" if enabled is True else "DISABLED"
        ET.SubElement(request, 'status').text = state

        result = self.connection.request_with_orgId_api_2(
            action='networkDomainVip/editPoolMember',
            method='POST',
            data=ET.tostring(request)).object

        response_code = findtext(result, 'responseCode', TYPES_URN)
        return response_code in ['IN_PROGRESS', 'OK']

    def ex_destroy_pool_member(self, member, destroy_node=False):
        """
        Destroy a specific member of a pool

        :param pool: The instance of a pool member
        :type  pool: ``DimensionDataPoolMember``

        :param destroy_node: Also destroy the associated node
        :type  destroy_node: ``bool``

        :return: ``True`` for success, ``False`` for failure
        :rtype: ``bool``
        """
        # remove the pool member
        destroy_request = ET.Element('removePoolMember',
                                     {'xmlns': TYPES_URN,
                                      'id': member.id})

        result = self.connection.request_with_orgId_api_2(
            action='networkDomainVip/removePoolMember',
            method='POST',
            data=ET.tostring(destroy_request)).object

        if member.node_id is not None and destroy_node is True:
            return self.ex_destroy_node(member.node_id)
        else:
            response_code = findtext(result, 'responseCode', TYPES_URN)
            return response_code in ['IN_PROGRESS', 'OK']

    def ex_get_nodes(self):
        """
        Get the nodes within this geography

        :return: Returns an ``list`` of ``DimensionDataVIPNode``
        :rtype: ``list`` of ``DimensionDataVIPNode``
        """
        nodes = self.connection \
            .request_with_orgId_api_2('networkDomainVip/node').object
        return self._to_nodes(nodes)

    def ex_get_node(self, node_id):
        """
        Get the node specified by node_id

        :return: Returns an instance of ``DimensionDataVIPNode``
        :rtype: Instance of ``DimensionDataVIPNode``
        """
        nodes = self.connection \
            .request_with_orgId_api_2('networkDomainVip/node/%s'
                                      % node_id).object
        return self._to_node(nodes)

    def ex_destroy_node(self, node_id):
        """
        Destroy a specific node

        :param node_id: The ID of of a ``DimensionDataVIPNode``
        :type  node_id: ``str``

        :return: ``True`` for success, ``False`` for failure
        :rtype: ``bool``
        """
        # Destroy the node
        destroy_request = ET.Element('deleteNode',
                                     {'xmlns': TYPES_URN,
                                      'id': node_id})

        result = self.connection.request_with_orgId_api_2(
            action='networkDomainVip/deleteNode',
            method='POST',
            data=ET.tostring(destroy_request)).object
        response_code = findtext(result, 'responseCode', TYPES_URN)
        return response_code in ['IN_PROGRESS', 'OK']

    def ex_wait_for_state(self, state, func, poll_interval=2,
                          timeout=60, *args, **kwargs):
        """
        Wait for the function which returns a instance
        with field status to match

        Keep polling func until one of the desired states is matched

        :param state: Either the desired state (`str`) or a `list` of states
        :type  state: ``str`` or ``list``

        :param  func: The function to call, e.g. ex_get_vlan
        :type   func: ``function``

        :param  poll_interval: The number of seconds to wait between checks
        :type   poll_interval: `int`

        :param  timeout: The total number of seconds to wait to reach a state
        :type   timeout: `int`

        :param  args: The arguments for func
        :type   args: Positional arguments

        :param  kwargs: The arguments for func
        :type   kwargs: Keyword arguments
        """
        return self.connection.wait_for_state(state, func, poll_interval,
                                              timeout, *args, **kwargs)

    def ex_get_default_health_monitors(self, network_domain_id):
        """
        Get the default health monitors available for a network domain

        :param network_domain_id: The ID of of a ``DimensionDataNetworkDomain``
        :type  network_domain_id: ``str``

        :rtype: `list` of :class:`DimensionDataDefaultHealthMonitor`
        """
        result = self.connection.request_with_orgId_api_2(
            action='networkDomainVip/defaultHealthMonitor',
            params={'networkDomainId': network_domain_id},
            method='GET').object
        return self._to_health_monitors(result)

    def ex_get_default_persistence_profiles(self, network_domain_id):
        """
        Get the default persistence profiles available for a network domain

        :param network_domain_id: The ID of of a ``DimensionDataNetworkDomain``
        :type  network_domain_id: ``str``

        :rtype: `list` of :class:`DimensionDataPersistenceProfile`
        """
        result = self.connection.request_with_orgId_api_2(
            action='networkDomainVip/defaultPersistenceProfile',
            params={'networkDomainId': network_domain_id},
            method='GET').object
        return self._to_persistence_profiles(result)

    def ex_get_default_irules(self, network_domain_id):
        """
        Get the default iRules available for a network domain

        :param network_domain_id: The ID of of a ``DimensionDataNetworkDomain``
        :type  network_domain_id: ``str``

        :rtype: `list` of :class:`DimensionDataDefaultiRule`
        """
        result = self.connection.request_with_orgId_api_2(
            action='networkDomainVip/defaultIrule',
            params={'networkDomainId': network_domain_id},
            method='GET').object
        return self._to_irules(result)

    def _to_irules(self, object):
        irules = []
        matches = object.findall(
            fixxpath('defaultIrule', TYPES_URN))
        for element in matches:
            irules.append(self._to_irule(element))
        return irules

    def _to_irule(self, element):
        compatible = []
        matches = element.findall(
            fixxpath('virtualListenerCompatibility', TYPES_URN))
        for match_element in matches:
            compatible.append(
                DimensionDataVirtualListenerCompatibility(
                    type=match_element.get('type'),
                    protocol=match_element.get('protocol', None)))
        irule_element = element.find(fixxpath('irule', TYPES_URN))
        return DimensionDataDefaultiRule(
            id=irule_element.get('id'),
            name=irule_element.get('name'),
            compatible_listeners=compatible
        )

    def _to_persistence_profiles(self, object):
        profiles = []
        matches = object.findall(
            fixxpath('defaultPersistenceProfile', TYPES_URN))
        for element in matches:
            profiles.append(self._to_persistence_profile(element))
        return profiles

    def _to_persistence_profile(self, element):
        compatible = []
        matches = element.findall(
            fixxpath('virtualListenerCompatibility', TYPES_URN))
        for match_element in matches:
            compatible.append(
                DimensionDataVirtualListenerCompatibility(
                    type=match_element.get('type'),
                    protocol=match_element.get('protocol', None)))

        return DimensionDataPersistenceProfile(
            id=element.get('id'),
            fallback_compatible=bool(
                element.get('fallbackCompatible') == "true"),
            name=findtext(element, 'name', TYPES_URN),
            compatible_listeners=compatible
        )

    def _to_health_monitors(self, object):
        monitors = []
        matches = object.findall(fixxpath('defaultHealthMonitor', TYPES_URN))
        for element in matches:
            monitors.append(self._to_health_monitor(element))
        return monitors

    def _to_health_monitor(self, element):
        return DimensionDataDefaultHealthMonitor(
            id=element.get('id'),
            name=findtext(element, 'name', TYPES_URN),
            node_compatible=bool(
                findtext(element, 'nodeCompatible', TYPES_URN) == "true"),
            pool_compatible=bool(
                findtext(element, 'poolCompatible', TYPES_URN) == "true"),
        )

    def _to_nodes(self, object):
        nodes = []
        for element in object.findall(fixxpath("node", TYPES_URN)):
            nodes.append(self._to_node(element))

        return nodes

    def _to_node(self, element):
        ipaddress = findtext(element, 'ipv4Address', TYPES_URN)
        if ipaddress is None:
            ipaddress = findtext(element, 'ipv6Address', TYPES_URN)

        name = findtext(element, 'name', TYPES_URN)

        node = DimensionDataVIPNode(
            id=element.get('id'),
            name=name,
            status=self._VALUE_TO_STATE_MAP.get(
                findtext(element, 'state', TYPES_URN),
                State.UNKNOWN),
            connection_rate_limit=findtext(element,
                                           'connectionRateLimit', TYPES_URN),
            connection_limit=findtext(element, 'connectionLimit', TYPES_URN),
            ip=ipaddress)

        return node

    def _to_balancers(self, object):
        loadbalancers = []
        for element in object.findall(fixxpath("virtualListener", TYPES_URN)):
            loadbalancers.append(self._to_balancer(element))

        return loadbalancers

    def _to_balancer(self, element):
        ipaddress = findtext(element, 'listenerIpAddress', TYPES_URN)
        name = findtext(element, 'name', TYPES_URN)
        port = findtext(element, 'port', TYPES_URN)
        extra = {}

        pool_element = element.find(fixxpath(
            'pool',
            TYPES_URN))
        if pool_element is None:
            extra['pool_id'] = None

        else:
            extra['pool_id'] = pool_element.get('id')

        extra['network_domain_id'] = findtext(element, 'networkDomainId',
                                              TYPES_URN)

        balancer = LoadBalancer(
            id=element.get('id'),
            name=name,
            state=self._VALUE_TO_STATE_MAP.get(
                findtext(element, 'state', TYPES_URN),
                State.UNKNOWN),
            ip=ipaddress,
            port=port,
            driver=self.connection.driver,
            extra=extra
        )

        return balancer

    def _to_members(self, object):
        members = []
        for element in object.findall(fixxpath("poolMember", TYPES_URN)):
            members.append(self._to_member(element))

        return members

    def _to_member(self, element):
        port = findtext(element, 'port', TYPES_URN)
        if port is not None:
            port = int(port)
        pool_member = DimensionDataPoolMember(
            id=element.get('id'),
            name=element.find(fixxpath(
                'node',
                TYPES_URN)).get('name'),
            status=findtext(element, 'state', TYPES_URN),
            node_id=element.find(fixxpath(
                'node',
                TYPES_URN)).get('id'),
            ip=element.find(fixxpath(
                'node',
                TYPES_URN)).get('ipAddress'),
            port=port
        )
        return pool_member

    def _to_pools(self, object):
        pools = []
        for element in object.findall(fixxpath("pool", TYPES_URN)):
            pools.append(self._to_pool(element))

        return pools

    def _to_pool(self, element):
        pool = DimensionDataPool(
            id=element.get('id'),
            name=findtext(element, 'name', TYPES_URN),
            status=findtext(element, 'state', TYPES_URN),
            description=findtext(element, 'description', TYPES_URN),
            load_balance_method=findtext(element, 'loadBalanceMethod',
                                         TYPES_URN),
            health_monitor_id=findtext(element, 'healthMonitorId', TYPES_URN),
            service_down_action=findtext(element, 'serviceDownAction',
                                         TYPES_URN),
            slow_ramp_time=findtext(element, 'slowRampTime', TYPES_URN),
        )
        return pool
