#!/usr/bin/env python
# Copyright 2015-2016 Yelp 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.
from paasta_tools.cli.utils import list_paasta_services
from paasta_tools.cli.utils import list_service_instances
from paasta_tools.cli.utils import list_services
from paasta_tools.utils import SPACER


def add_subparser(subparsers):
    list_parser = subparsers.add_parser(
        'list',
        help="Display a list of PaaSTA services",
        description=(
            "'paasta list' inspects the soa-configs directory and lists all of the "
            "PaaSTA services that are declared."
        ),
    )
    list_parser.add_argument(
        '-a', '--all',
        action='store_true',
        help='Display all services, even if not on PaaSTA.')
    list_parser.add_argument(
        '-i', '--print-instances',
        action='store_true',
        help='Display all service%sinstance values, which only PaaSTA services have.' % SPACER)
    list_parser.set_defaults(command=paasta_list)


def paasta_list(args):
    """Print a list of Yelp services currently running
    :param args: argparse.Namespace obj created from sys.args by cli"""
    if args.print_instances:
        services = list_service_instances()
    elif args.all:
        services = list_services()
    else:
        services = list_paasta_services()

    for service in services:
        print service
