#   Copyright 2012-2013 OpenStack Foundation
#
#   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.
#

"""Service action implementations"""

import argparse
import logging
import six

from cliff import command
from cliff import lister
from cliff import show

from openstackclient.common import exceptions
from openstackclient.common import utils
from openstackclient.i18n import _  # noqa
from openstackclient.identity import common


class CreateService(show.ShowOne):
    """Create new service"""

    log = logging.getLogger(__name__ + '.CreateService')

    def get_parser(self, prog_name):
        parser = super(CreateService, self).get_parser(prog_name)
        parser.add_argument(
            'type_or_name',
            metavar='<type>',
            help=_('New service type (compute, image, identity, volume, etc)'),
        )
        type_or_name_group = parser.add_mutually_exclusive_group()
        type_or_name_group.add_argument(
            '--type',
            metavar='<type>',
            help=argparse.SUPPRESS,
        )
        type_or_name_group.add_argument(
            '--name',
            metavar='<name>',
            help=_('New service name'),
        )
        parser.add_argument(
            '--description',
            metavar='<description>',
            help=_('New service description'),
        )
        return parser

    @utils.log_method(log)
    def take_action(self, parsed_args):
        identity_client = self.app.client_manager.identity

        type_or_name = parsed_args.type_or_name
        name = parsed_args.name
        type = parsed_args.type

        # If only a single positional is present, it's a <type>.
        # This is not currently legal so it is considered a new case.
        if not type and not name:
            type = type_or_name
        # If --type option is present then positional is handled as <name>;
        # display deprecation message.
        elif type:
            name = type_or_name
            self.log.warning(_('The argument --type is deprecated, use service'
                               ' create --name <service-name> type instead.'))
        # If --name option is present the positional is handled as <type>.
        # Making --type optional is new, but back-compatible
        elif name:
            type = type_or_name

        service = identity_client.services.create(
            name,
            type,
            parsed_args.description)

        info = {}
        info.update(service._info)
        return zip(*sorted(six.iteritems(info)))


class DeleteService(command.Command):
    """Delete service"""

    log = logging.getLogger(__name__ + '.DeleteService')

    def get_parser(self, prog_name):
        parser = super(DeleteService, self).get_parser(prog_name)
        parser.add_argument(
            'service',
            metavar='<service>',
            help=_('Service to delete (name or ID)'),
        )
        return parser

    @utils.log_method(log)
    def take_action(self, parsed_args):
        identity_client = self.app.client_manager.identity
        service = common.find_service(identity_client, parsed_args.service)
        identity_client.services.delete(service.id)
        return


class ListService(lister.Lister):
    """List services"""

    log = logging.getLogger(__name__ + '.ListService')

    def get_parser(self, prog_name):
        parser = super(ListService, self).get_parser(prog_name)
        parser.add_argument(
            '--long',
            action='store_true',
            default=False,
            help=_('List additional fields in output'),
        )
        return parser

    @utils.log_method(log)
    def take_action(self, parsed_args):

        if parsed_args.long:
            columns = ('ID', 'Name', 'Type', 'Description')
        else:
            columns = ('ID', 'Name', 'Type')
        data = self.app.client_manager.identity.services.list()
        return (
            columns,
            (utils.get_item_properties(s, columns) for s in data),
        )


class ShowService(show.ShowOne):
    """Display service details"""

    log = logging.getLogger(__name__ + '.ShowService')

    def get_parser(self, prog_name):
        parser = super(ShowService, self).get_parser(prog_name)
        parser.add_argument(
            'service',
            metavar='<service>',
            help=_('Service to display (type, name or ID)'),
        )
        parser.add_argument(
            '--catalog',
            action='store_true',
            default=False,
            help=_('Show service catalog information'),
        )
        return parser

    @utils.log_method(log)
    def take_action(self, parsed_args):
        identity_client = self.app.client_manager.identity
        auth_ref = self.app.client_manager.auth_ref

        if parsed_args.catalog:
            endpoints = auth_ref.service_catalog.get_endpoints(
                service_type=parsed_args.service)
            for (service, service_endpoints) in six.iteritems(endpoints):
                if service_endpoints:
                    info = {"type": service}
                    info.update(service_endpoints[0])
                    return zip(*sorted(six.iteritems(info)))

            msg = _("No service catalog with a type, name or ID of '%s' "
                    "exists.") % (parsed_args.service)
            raise exceptions.CommandError(msg)
        else:
            service = common.find_service(identity_client, parsed_args.service)
            info = {}
            info.update(service._info)
            return zip(*sorted(six.iteritems(info)))