#!/usr/bin/env python
#
#    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.

"""
Implements cfn-signal CloudFormation functionality
"""
import argparse
import logging
import sys


from heat_cfntools.cfntools import cfn_helper


description = " "
parser = argparse.ArgumentParser(description=description)
parser.add_argument('-s', '--success',
                    dest="success",
                    help="signal status to report",
                    default='true',
                    required=False)
parser.add_argument('-r', '--reason',
                    dest="reason",
                    help="The reason for the failure",
                    default="Configuration Complete",
                    required=False)
parser.add_argument('-d', '--data',
                    dest="data",
                    default="Application has completed configuration.",
                    help="The data to send",
                    required=False)
parser.add_argument('-i', '--id',
                    dest="unique_id",
                    help="the unique id to send back to the WaitCondition",
                    default=None,
                    required=False)
parser.add_argument('-e', '--exit-code',
                    dest="exit_code",
                    help="The exit code from a process to interpret",
                    default=None,
                    required=False)
parser.add_argument('--exit',
                    dest="exit",
                    help="DEPRECATED! Use -e or --exit-code instead.",
                    default=None,
                    required=False)
parser.add_argument('url',
                    help='the url to post to')
parser.add_argument('-k', '--insecure',
                    help="This will make insecure https request to cfn-api.",
                    action='store_true')
args = parser.parse_args()

log_format = '%(levelname)s [%(asctime)s] %(message)s'
log_file_name = "/var/log/cfn-signal.log"
logging.basicConfig(filename=log_file_name,
                    format=log_format,
                    level=logging.DEBUG)

LOG = logging.getLogger('cfntools')

LOG.debug('cfn-signal called %s ' % (str(args)))
if args.exit:
    LOG.warning('--exit DEPRECATED! Use -e or --exit-code instead.')
status = 'FAILURE'
exit_code = args.exit_code or args.exit
if exit_code:
    # "exit_code" takes precedence over "success".
    if exit_code == '0':
        status = 'SUCCESS'
else:
    if args.success == 'true':
        status = 'SUCCESS'

unique_id = args.unique_id
if unique_id is None:
    LOG.debug('No id passed from the command line')
    md = cfn_helper.Metadata('not-used', None)
    unique_id = md.get_instance_id()
    if unique_id is None:
        LOG.error('Could not get the instance id from metadata!')
        import socket
        unique_id = socket.getfqdn()
LOG.debug('id: %s' % (unique_id))

body = {
    "Status": status,
    "Reason": args.reason,
    "UniqueId": unique_id,
    "Data": args.data
}
data = cfn_helper.json.dumps(body)

cmd = ['curl']
if args.insecure:
    cmd.append('--insecure')
cmd.extend([
    '-X', 'PUT',
    '-H', 'Content-Type:',
    '--data-binary', data,
    args.url
])

command = cfn_helper.CommandRunner(cmd).run()
if command.status != 0:
    LOG.error(command.stderr)
sys.exit(command.status)