# Copyright 2013 OpenStack Foundation.
# All Rights Reserved
#
#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with 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.
#

from __future__ import print_function

from neutronclient._i18n import _
from neutronclient.neutron import v2_0 as neutronV20
from neutronclient.neutron.v2_0 import network
from neutronclient.neutron.v2_0 import router


PERFECT_TIME_FORMAT = "%Y-%m-%dT%H:%M:%S.%f"


class AddNetworkToDhcpAgent(neutronV20.NeutronCommand):
    """Add a network to a DHCP agent."""

    def get_parser(self, prog_name):
        parser = super(AddNetworkToDhcpAgent, self).get_parser(prog_name)
        parser.add_argument(
            'dhcp_agent',
            metavar='DHCP_AGENT',
            help=_('ID of the DHCP agent.'))
        parser.add_argument(
            'network',
            metavar='NETWORK',
            help=_('Network to add.'))
        return parser

    def take_action(self, parsed_args):
        neutron_client = self.get_client()
        _net_id = neutronV20.find_resourceid_by_name_or_id(
            neutron_client, 'network', parsed_args.network)
        neutron_client.add_network_to_dhcp_agent(parsed_args.dhcp_agent,
                                                 {'network_id': _net_id})
        print(_('Added network %s to DHCP agent') % parsed_args.network,
              file=self.app.stdout)


class RemoveNetworkFromDhcpAgent(neutronV20.NeutronCommand):
    """Remove a network from a DHCP agent."""

    def get_parser(self, prog_name):
        parser = super(RemoveNetworkFromDhcpAgent, self).get_parser(prog_name)
        parser.add_argument(
            'dhcp_agent',
            metavar='DHCP_AGENT',
            help=_('ID of the DHCP agent.'))
        parser.add_argument(
            'network',
            metavar='NETWORK',
            help=_('Network to remove.'))
        return parser

    def take_action(self, parsed_args):
        neutron_client = self.get_client()
        _net_id = neutronV20.find_resourceid_by_name_or_id(
            neutron_client, 'network', parsed_args.network)
        neutron_client.remove_network_from_dhcp_agent(
            parsed_args.dhcp_agent, _net_id)
        print(_('Removed network %s from DHCP agent') % parsed_args.network,
              file=self.app.stdout)


class ListNetworksOnDhcpAgent(network.ListNetwork):
    """List the networks on a DHCP agent."""

    unknown_parts_flag = False

    def get_parser(self, prog_name):
        parser = super(ListNetworksOnDhcpAgent,
                       self).get_parser(prog_name)
        parser.add_argument(
            'dhcp_agent',
            metavar='DHCP_AGENT',
            help=_('ID of the DHCP agent.'))
        return parser

    def call_server(self, neutron_client, search_opts, parsed_args):
        data = neutron_client.list_networks_on_dhcp_agent(
            parsed_args.dhcp_agent, **search_opts)
        return data


class ListDhcpAgentsHostingNetwork(neutronV20.ListCommand):
    """List DHCP agents hosting a network."""

    resource = 'agent'
    _formatters = {}
    list_columns = ['id', 'host', 'admin_state_up', 'alive']
    unknown_parts_flag = False

    def get_parser(self, prog_name):
        parser = super(ListDhcpAgentsHostingNetwork,
                       self).get_parser(prog_name)
        parser.add_argument(
            'network',
            metavar='NETWORK',
            help=_('Network to query.'))
        return parser

    def extend_list(self, data, parsed_args):
        for agent in data:
            agent['alive'] = ":-)" if agent['alive'] else 'xxx'

    def call_server(self, neutron_client, search_opts, parsed_args):
        _id = neutronV20.find_resourceid_by_name_or_id(neutron_client,
                                                       'network',
                                                       parsed_args.network)
        search_opts['network'] = _id
        data = neutron_client.list_dhcp_agent_hosting_networks(**search_opts)
        return data


class AddRouterToL3Agent(neutronV20.NeutronCommand):
    """Add a router to a L3 agent."""

    def get_parser(self, prog_name):
        parser = super(AddRouterToL3Agent, self).get_parser(prog_name)
        parser.add_argument(
            'l3_agent',
            metavar='L3_AGENT',
            help=_('ID of the L3 agent.'))
        parser.add_argument(
            'router',
            metavar='ROUTER',
            help=_('Router to add.'))
        return parser

    def take_action(self, parsed_args):
        neutron_client = self.get_client()
        _id = neutronV20.find_resourceid_by_name_or_id(
            neutron_client, 'router', parsed_args.router)
        neutron_client.add_router_to_l3_agent(parsed_args.l3_agent,
                                              {'router_id': _id})
        print(_('Added router %s to L3 agent') % parsed_args.router,
              file=self.app.stdout)


class RemoveRouterFromL3Agent(neutronV20.NeutronCommand):
    """Remove a router from a L3 agent."""

    def get_parser(self, prog_name):
        parser = super(RemoveRouterFromL3Agent, self).get_parser(prog_name)
        parser.add_argument(
            'l3_agent',
            metavar='L3_AGENT',
            help=_('ID of the L3 agent.'))
        parser.add_argument(
            'router',
            metavar='ROUTER',
            help=_('Router to remove.'))
        return parser

    def take_action(self, parsed_args):
        neutron_client = self.get_client()
        _id = neutronV20.find_resourceid_by_name_or_id(
            neutron_client, 'router', parsed_args.router)
        neutron_client.remove_router_from_l3_agent(
            parsed_args.l3_agent, _id)
        print(_('Removed router %s from L3 agent') % parsed_args.router,
              file=self.app.stdout)


class ListRoutersOnL3Agent(neutronV20.ListCommand):
    """List the routers on a L3 agent."""

    _formatters = {'external_gateway_info':
                   router._format_external_gateway_info}
    list_columns = ['id', 'name', 'external_gateway_info']
    resource = 'router'
    unknown_parts_flag = False

    def get_parser(self, prog_name):
        parser = super(ListRoutersOnL3Agent,
                       self).get_parser(prog_name)
        parser.add_argument(
            'l3_agent',
            metavar='L3_AGENT',
            help=_('ID of the L3 agent to query.'))
        return parser

    def call_server(self, neutron_client, search_opts, parsed_args):
        data = neutron_client.list_routers_on_l3_agent(
            parsed_args.l3_agent, **search_opts)
        return data


class ListL3AgentsHostingRouter(neutronV20.ListCommand):
    """List L3 agents hosting a router."""

    resource = 'agent'
    _formatters = {}
    list_columns = ['id', 'host', 'admin_state_up', 'alive']
    unknown_parts_flag = False

    def get_parser(self, prog_name):
        parser = super(ListL3AgentsHostingRouter,
                       self).get_parser(prog_name)
        parser.add_argument('router',
                            metavar='ROUTER',
                            help=_('Router to query.'))
        return parser

    def extend_list(self, data, parsed_args):
        # Show the ha_state column only if the server responds with it,
        # as some plugins do not support HA routers.
        if any('ha_state' in agent for agent in data):
            if 'ha_state' not in self.list_columns:
                self.list_columns.append('ha_state')
        for agent in data:
            agent['alive'] = ":-)" if agent['alive'] else 'xxx'

    def call_server(self, neutron_client, search_opts, parsed_args):
        _id = neutronV20.find_resourceid_by_name_or_id(neutron_client,
                                                       'router',
                                                       parsed_args.router)
        search_opts['router'] = _id
        data = neutron_client.list_l3_agent_hosting_routers(**search_opts)
        return data


class ListPoolsOnLbaasAgent(neutronV20.ListCommand):
    """List the pools on a loadbalancer agent."""

    list_columns = ['id', 'name', 'lb_method', 'protocol',
                    'admin_state_up', 'status']
    resource = 'pool'
    unknown_parts_flag = False

    def get_parser(self, prog_name):
        parser = super(ListPoolsOnLbaasAgent, self).get_parser(prog_name)
        parser.add_argument(
            'lbaas_agent',
            metavar='LBAAS_AGENT',
            help=_('ID of the loadbalancer agent to query.'))
        return parser

    def call_server(self, neutron_client, search_opts, parsed_args):
        data = neutron_client.list_pools_on_lbaas_agent(
            parsed_args.lbaas_agent, **search_opts)
        return data


class GetLbaasAgentHostingPool(neutronV20.ListCommand):
    """Get loadbalancer agent hosting a pool.

    Deriving from ListCommand though server will return only one agent
    to keep common output format for all agent schedulers
    """

    resource = 'agent'
    list_columns = ['id', 'host', 'admin_state_up', 'alive']
    unknown_parts_flag = False

    def get_parser(self, prog_name):
        parser = super(GetLbaasAgentHostingPool,
                       self).get_parser(prog_name)
        parser.add_argument('pool',
                            metavar='POOL',
                            help=_('Pool to query.'))
        return parser

    def extend_list(self, data, parsed_args):
        for agent in data:
            agent['alive'] = ":-)" if agent['alive'] else 'xxx'

    def call_server(self, neutron_client, search_opts, parsed_args):
        _id = neutronV20.find_resourceid_by_name_or_id(neutron_client,
                                                       'pool',
                                                       parsed_args.pool)
        search_opts['pool'] = _id
        agent = neutron_client.get_lbaas_agent_hosting_pool(**search_opts)
        data = {'agents': [agent['agent']]}
        return data


class ListLoadBalancersOnLbaasAgent(neutronV20.ListCommand):
    """List the loadbalancers on a loadbalancer v2 agent."""

    list_columns = ['id', 'name', 'admin_state_up', 'provisioning_status']
    resource = 'loadbalancer'
    unknown_parts_flag = False

    def get_parser(self, prog_name):
        parser = super(ListLoadBalancersOnLbaasAgent, self).get_parser(
            prog_name)
        parser.add_argument(
            'lbaas_agent',
            metavar='LBAAS_AGENT',
            help=_('ID of the loadbalancer agent to query.'))
        return parser

    def call_server(self, neutron_client, search_opts, parsed_args):
        data = neutron_client.list_loadbalancers_on_lbaas_agent(
            parsed_args.lbaas_agent, **search_opts)
        return data


class GetLbaasAgentHostingLoadBalancer(neutronV20.ListCommand):
    """Get lbaas v2 agent hosting a loadbalancer.

    Deriving from ListCommand though server will return only one agent
    to keep common output format for all agent schedulers
    """

    resource = 'agent'
    list_columns = ['id', 'host', 'admin_state_up', 'alive']
    unknown_parts_flag = False

    def get_parser(self, prog_name):
        parser = super(GetLbaasAgentHostingLoadBalancer,
                       self).get_parser(prog_name)
        parser.add_argument('loadbalancer',
                            metavar='LOADBALANCER',
                            help=_('LoadBalancer to query.'))
        return parser

    def extend_list(self, data, parsed_args):
        for agent in data:
            agent['alive'] = ":-)" if agent['alive'] else 'xxx'

    def call_server(self, neutron_client, search_opts, parsed_args):
        _id = neutronV20.find_resourceid_by_name_or_id(
            neutron_client, 'loadbalancer', parsed_args.loadbalancer)
        search_opts['loadbalancer'] = _id
        agent = neutron_client.get_lbaas_agent_hosting_loadbalancer(
            **search_opts)
        data = {'agents': [agent['agent']]}
        return data
