#!/usr/bin/python3

import os
import json
import argparse


def parse_cli_args():
    ''' Command line argument processing '''

    parser = argparse.ArgumentParser(
        formatter_class=argparse.ArgumentDefaultsHelpFormatter,
    )
    parser.add_argument('--list', action='store_true', help='list hosts')
    parser.add_argument('--host', help='get host variables')
    args = parser.parse_args()
    return args


def list_hosts():
    host = os.getenv('ANSIBLE_HOST','127.0.0.1')
    port = os.getenv('ANSIBLE_PORT', '22')
    python_interpreter= os.getenv('ANSIBLE_PYTHON_INTERPRETER', '/usr/bin/python3')
    inventory = {
        'all': {
            'hosts': [host],
        },
        '_meta': {
            'hostvars': {
                host: {
                    'ansible_port': port,
                    'ansible_python_interpreter': python_interpreter,
                },
            },
        },
    }

    # myhost = {'ansible_port': '5555', 'ansible_host': '192.0.2.50'}

    # inventory['hosts'].append({'myhost': myhost})
    print(json.dumps(inventory))


def get_host_vars(host):
    print(json.dumps({}))


def main():
    args = parse_cli_args()
    if args.list:
        list_hosts()
    elif args.host:
        get_host_vars(args.host)


# if __name__ == '__main__':
    # main()
main()