# 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 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 _
from openstackclient.identity import common


LOG = logging.getLogger(__name__)


def _determine_ec2_user(parsed_args, client_manager):
    """Determine a user several different ways.

    Assumes parsed_args has user and user_domain arguments. Attempts to find
    the user if domain scoping is provided, otherwise revert to a basic user
    call. Lastly use the currently authenticated user.

    """

    user_domain = None
    if parsed_args.user_domain:
        user_domain = common.find_domain(client_manager.identity,
                                         parsed_args.user_domain)
    if parsed_args.user:
        if user_domain is not None:
            user = utils.find_resource(client_manager.identity.users,
                                       parsed_args.user,
                                       domain_id=user_domain.id).id
        else:
            user = utils.find_resource(
                client_manager.identity.users,
                parsed_args.user).id
    else:
        # Get the user from the current auth
        user = client_manager.auth_ref.user_id
    return user


class CreateEC2Creds(command.ShowOne):
    _description = _("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)'),
        )
        common.add_user_domain_option_to_parser(parser)
        common.add_project_domain_option_to_parser(parser)
        return parser

    def take_action(self, parsed_args):
        identity_client = self.app.client_manager.identity
        client_manager = self.app.client_manager
        user = _determine_ec2_user(parsed_args, client_manager)

        project_domain = None
        if parsed_args.project_domain:
            project_domain = common.find_domain(identity_client,
                                                parsed_args.project_domain)

        if parsed_args.project:
            if project_domain is not None:
                project = utils.find_resource(identity_client.projects,
                                              parsed_args.project,
                                              domain_id=project_domain.id).id
            else:
                project = utils.find_resource(
                    identity_client.projects,
                    parsed_args.project).id
        else:
            # Get the project from the current auth
            project = self.app.client_manager.auth_ref.project_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):
    _description = _("Delete EC2 credentials")

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

    def take_action(self, parsed_args):
        client_manager = self.app.client_manager
        user = _determine_ec2_user(parsed_args, client_manager)
        result = 0
        for i in parsed_args.access_key:
            try:
                client_manager.identity.ec2.delete(user, i)
            except Exception as e:
                result += 1
                LOG.error(_("Failed to delete EC2 credentials with "
                          "access key '%(access_key)s': %(e)s"),
                          {'access_key': i, 'e': e})

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


class ListEC2Creds(command.Lister):
    _description = _("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)'),
        )
        common.add_user_domain_option_to_parser(parser)
        return parser

    def take_action(self, parsed_args):
        client_manager = self.app.client_manager
        user = _determine_ec2_user(parsed_args, client_manager)

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

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


class ShowEC2Creds(command.ShowOne):
    _description = _("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)'),
        )
        common.add_user_domain_option_to_parser(parser)
        return parser

    def take_action(self, parsed_args):
        client_manager = self.app.client_manager
        user = _determine_ec2_user(parsed_args, client_manager)
        creds = client_manager.identity.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)))
