#   Copyright 2012 OpenStack Foundation
#   Copyright 2013 Nebula Inc.
#
#   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 v2 EC2 Credentials action 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 CreateEC2Creds(command.ShowOne):
    """Create EC2 credentials"""

    def get_parser(self, prog_name):
        parser = super(CreateEC2Creds, self).get_parser(prog_name)
        parser.add_argument(
            '--project',
            metavar='<project>',
            help=_(
                'Create credentials in project '
                '(name or ID; default: current authenticated project)'
            ),
        )
        parser.add_argument(
            '--user',
            metavar='<user>',
            help=_(
                'Create credentials for user '
                '(name or ID; default: current authenticated user)'
            ),
        )
        return parser

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

        if parsed_args.project:
            project = utils.find_resource(
                identity_client.tenants,
                parsed_args.project,
            ).id
        else:
            # Get the project from the current auth
            project = self.app.client_manager.auth_ref.project_id
        if parsed_args.user:
            user = utils.find_resource(
                identity_client.users,
                parsed_args.user,
            ).id
        else:
            # Get the user from the current auth
            user = self.app.client_manager.auth_ref.user_id

        creds = identity_client.ec2.create(user, project)

        info = {}
        info.update(creds._info)

        if 'tenant_id' in info:
            info.update(
                {'project_id': info.pop('tenant_id')}
            )

        return zip(*sorted(six.iteritems(info)))


class DeleteEC2Creds(command.Command):
    """Delete EC2 credentials"""

    def get_parser(self, prog_name):
        parser = super(DeleteEC2Creds, self).get_parser(prog_name)
        parser.add_argument(
            'access_keys',
            metavar='<access-key>',
            nargs='+',
            help=_('Credentials access key(s)'),
        )
        parser.add_argument(
            '--user',
            metavar='<user>',
            help=_('Delete credentials for user (name or ID)'),
        )
        return parser

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

        if parsed_args.user:
            user = utils.find_resource(
                identity_client.users,
                parsed_args.user,
            ).id
        else:
            # Get the user from the current auth
            user = self.app.client_manager.auth_ref.user_id

        result = 0
        for access_key in parsed_args.access_keys:
            try:
                identity_client.ec2.delete(user, access_key)
            except Exception as e:
                result += 1
                LOG.error(_("Failed to delete EC2 credentials with "
                          "access key '%(access_key)s': %(e)s")
                          % {'access_key': access_key, 'e': e})

        if result > 0:
            total = len(parsed_args.access_keys)
            msg = (_("%(result)s of %(total)s EC2 keys failed "
                   "to delete.") % {'result': result, 'total': total})
            raise exceptions.CommandError(msg)


class ListEC2Creds(command.Lister):
    """List EC2 credentials"""

    def get_parser(self, prog_name):
        parser = super(ListEC2Creds, self).get_parser(prog_name)
        parser.add_argument(
            '--user',
            metavar='<user>',
            help=_('Filter list by user (name or ID)'),
        )
        return parser

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

        if parsed_args.user:
            user = utils.find_resource(
                identity_client.users,
                parsed_args.user,
            ).id
        else:
            # Get the user from the current auth
            user = self.app.client_manager.auth_ref.user_id

        columns = ('access', 'secret', 'tenant_id', 'user_id')
        column_headers = ('Access', 'Secret', 'Project ID', 'User ID')
        data = identity_client.ec2.list(user)

        return (column_headers,
                (utils.get_item_properties(
                    s, columns,
                    formatters={},
                ) for s in data))


class ShowEC2Creds(command.ShowOne):
    """Display EC2 credentials details"""

    def get_parser(self, prog_name):
        parser = super(ShowEC2Creds, self).get_parser(prog_name)
        parser.add_argument(
            'access_key',
            metavar='<access-key>',
            help=_('Credentials access key'),
        )
        parser.add_argument(
            '--user',
            metavar='<user>',
            help=_('Show credentials for user (name or ID)'),
        )
        return parser

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

        if parsed_args.user:
            user = utils.find_resource(
                identity_client.users,
                parsed_args.user,
            ).id
        else:
            # Get the user from the current auth
            user = self.app.client_manager.auth_ref.user_id

        creds = identity_client.ec2.get(user, parsed_args.access_key)

        info = {}
        info.update(creds._info)

        if 'tenant_id' in info:
            info.update(
                {'project_id': info.pop('tenant_id')}
            )

        return zip(*sorted(six.iteritems(info)))
