#   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.
#


"""Identity v3 Protocols actions implementations"""

import logging

from osc_lib.command import command
from osc_lib import exceptions
from osc_lib import utils
import six

from openstackclient.i18n import _


LOG = logging.getLogger(__name__)


class CreateProtocol(command.ShowOne):
    """Create new federation protocol"""

    def get_parser(self, prog_name):
        parser = super(CreateProtocol, self).get_parser(prog_name)
        parser.add_argument(
            'federation_protocol',
            metavar='<name>',
            help=_('New federation protocol name (must be unique '
                   'per identity provider)'),
        )
        parser.add_argument(
            '--identity-provider',
            metavar='<identity-provider>',
            required=True,
            help=_('Identity provider that will support the new federation '
                   ' protocol (name or ID) (required)'),
        )
        parser.add_argument(
            '--mapping',
            metavar='<mapping>',
            required=True,
            help=_('Mapping that is to be used (name or ID) (required)'),
        )

        return parser

    def take_action(self, parsed_args):
        identity_client = self.app.client_manager.identity
        protocol = identity_client.federation.protocols.create(
            protocol_id=parsed_args.federation_protocol,
            identity_provider=parsed_args.identity_provider,
            mapping=parsed_args.mapping)
        info = dict(protocol._info)
        # NOTE(marek-denis): Identity provider is not included in a response
        # from Keystone, however it should be listed to the user. Add it
        # manually to the output list, simply reusing value provided by the
        # user.
        info['identity_provider'] = parsed_args.identity_provider
        info['mapping'] = info.pop('mapping_id')
        info.pop('links', None)
        return zip(*sorted(six.iteritems(info)))


class DeleteProtocol(command.Command):
    """Delete federation protocol(s)"""

    def get_parser(self, prog_name):
        parser = super(DeleteProtocol, self).get_parser(prog_name)
        parser.add_argument(
            'federation_protocol',
            metavar='<federation-protocol>',
            nargs='+',
            help=_('Federation protocol(s) to delete (name or ID)'),
        )
        parser.add_argument(
            '--identity-provider',
            metavar='<identity-provider>',
            required=True,
            help=_('Identity provider that supports <federation-protocol> '
                   '(name or ID) (required)'),
        )

        return parser

    def take_action(self, parsed_args):
        identity_client = self.app.client_manager.identity
        result = 0
        for i in parsed_args.federation_protocol:
            try:
                identity_client.federation.protocols.delete(
                    parsed_args.identity_provider, i)
            except Exception as e:
                result += 1
                LOG.error(_("Failed to delete federation protocol "
                          "with name or ID '%(protocol)s': %(e)s")
                          % {'protocol': i, 'e': e})

        if result > 0:
            total = len(parsed_args.federation_protocol)
            msg = (_("%(result)s of %(total)s federation protocols failed"
                   " to delete.") % {'result': result, 'total': total})
            raise exceptions.CommandError(msg)


class ListProtocols(command.Lister):
    """List federation protocols"""

    def get_parser(self, prog_name):
        parser = super(ListProtocols, self).get_parser(prog_name)
        parser.add_argument(
            '--identity-provider',
            metavar='<identity-provider>',
            required=True,
            help=_('Identity provider to list (name or ID) (required)'),
        )

        return parser

    def take_action(self, parsed_args):
        identity_client = self.app.client_manager.identity

        protocols = identity_client.federation.protocols.list(
            parsed_args.identity_provider)
        columns = ('id', 'mapping')
        response_attributes = ('id', 'mapping_id')
        items = [utils.get_item_properties(s, response_attributes)
                 for s in protocols]
        return (columns, items)


class SetProtocol(command.Command):
    """Set federation protocol properties"""

    def get_parser(self, prog_name):
        parser = super(SetProtocol, self).get_parser(prog_name)
        parser.add_argument(
            'federation_protocol',
            metavar='<name>',
            help=_('Federation protocol to modify (name or ID)'),
        )
        parser.add_argument(
            '--identity-provider',
            metavar='<identity-provider>',
            required=True,
            help=_('Identity provider that supports <federation-protocol> '
                   '(name or ID) (required)'),
        )
        parser.add_argument(
            '--mapping',
            metavar='<mapping>',
            help=_('Mapping that is to be used (name or ID)'),
        )
        return parser

    def take_action(self, parsed_args):
        identity_client = self.app.client_manager.identity

        protocol = identity_client.federation.protocols.update(
            parsed_args.identity_provider, parsed_args.federation_protocol,
            parsed_args.mapping)
        info = dict(protocol._info)
        # NOTE(marek-denis): Identity provider is not included in a response
        # from Keystone, however it should be listed to the user. Add it
        # manually to the output list, simply reusing value provided by the
        # user.
        info['identity_provider'] = parsed_args.identity_provider
        info['mapping'] = info.pop('mapping_id')
        return zip(*sorted(six.iteritems(info)))


class ShowProtocol(command.ShowOne):
    """Display federation protocol details"""

    def get_parser(self, prog_name):
        parser = super(ShowProtocol, self).get_parser(prog_name)
        parser.add_argument(
            'federation_protocol',
            metavar='<federation-protocol>',
            help=_('Federation protocol to display (name or ID)'),
        )
        parser.add_argument(
            '--identity-provider',
            metavar='<identity-provider>',
            required=True,
            help=_('Identity provider that supports <federation-protocol> '
                   '(name or ID) (required)'),
        )
        return parser

    def take_action(self, parsed_args):
        identity_client = self.app.client_manager.identity

        protocol = identity_client.federation.protocols.get(
            parsed_args.identity_provider, parsed_args.federation_protocol)
        info = dict(protocol._info)
        info['mapping'] = info.pop('mapping_id')
        info.pop('links', None)
        return zip(*sorted(six.iteritems(info)))
