#!/usr/bin/env python
# -*- encoding: utf-8 -*-
#
# Copyright © 2013 Rackspace Hosting.
#
# Author: Monsyne Dragon <mdragon@rackspace.com>
#
# 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.

"""Command line tool help you debug your event definitions.

Feed it a list of test notifications in json format, and it will show
you what events will be generated.
"""

import json
import sys

from oslo.config import cfg
from stevedore import extension

from ceilometer.event import converter
from ceilometer import service


cfg.CONF.register_cli_opts([
    cfg.StrOpt('input-file',
               short='i',
               help='File to read test notifications from.'
               ' (Containing a json list of notifications.)'
               ' defaults to stdin.'),
    cfg.StrOpt('output-file',
               short='o',
               help='File to write results to. Defaults to stdout.'),
])

TYPES = {1: 'text',
         2: 'int',
         3: 'float',
         4: 'datetime'}


service.prepare_service()

config_file = converter.get_config_file()
output_file = cfg.CONF.output_file
input_file = cfg.CONF.input_file

if output_file is None:
    out = sys.stdout
else:
    out = open(output_file, 'w')

if input_file is None:
    notifications = json.load(sys.stdin)
else:
    with open(input_file, 'r') as f:
        notifications = json.load(f)

out.write("Definitions file: %s\n" % config_file)
out.write("Notifications tested: %s\n" % len(notifications))

event_converter = converter.setup_events(
    extension.ExtensionManager(
        namespace='ceilometer.event.trait_plugin'))

for notification in notifications:
    event = event_converter.to_event(notification)
    if event is None:
        out.write("Dropped notification: %s\n" %
                  notification['message_id'])
        continue
    out.write("Event: %s at %s\n" % (event.event_name, event.generated))
    for trait in event.traits:
        dtype = TYPES[trait.dtype]
        out.write("    Trait: name: %s, type: %s, value: %s\n" % (
            trait.name, dtype, trait.value))