#!/usr/bin/python
# -*- coding: utf-8 -*-
#
# (C) Seth Edwards, 2014
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
#


import base64

DOCUMENTATION = '''
---
module: librato_annotation
short_description: create an annotation in librato
description:
    - Create an annotation event on the given annotation stream :name. If the annotation stream does not exist, it will be created automatically
version_added: "1.6"
author: Seth Edwards
requirements:
    - urllib2
    - base64
options:
    user:
        description:
           - Librato account username
        required: true
    api_key:
        description:
           - Librato account api key
        required: true
    name:
        description:
            - The annotation stream name
            - If the annotation stream does not exist, it will be created automatically
        required: false
    title:
        description:
            - The title of an annotation is a string and may contain spaces
            - The title should be a short, high-level summary of the annotation e.g. v45 Deployment
        required: true
    source:
        description:
            - A string which describes the originating source of an annotation when that annotation is tracked across multiple members of a population
        required: false
    description:
        description:
            - The description contains extra meta-data about a particular annotation
            - The description should contain specifics on the individual annotation e.g. Deployed 9b562b2 shipped new feature foo!
        required: false
    start_time:
        description:
            - The unix timestamp indicating the the time at which the event referenced by this annotation started
        required: false
    end_time:
        description:
            - The unix timestamp indicating the the time at which the event referenced by this annotation ended
            - For events that have a duration, this is a useful way to annotate the duration of the event
        required: false
    links:
        description:
            - See examples
        required: true
'''

EXAMPLES = '''
# Create a simple annotation event with a source
- librato_annotation:
    user: user@example.com
    api_key: XXXXXXXXXXXXXXXXX
    title: 'App Config Change'
    source: 'foo.bar'
    description: 'This is a detailed description of the config change'

# Create an annotation that includes a link
- librato_annotation:
    user: user@example.com
    api_key: XXXXXXXXXXXXXXXXXX
    name: 'code.deploy'
    title: 'app code deploy'
    description: 'this is a detailed description of a deployment'
    links:
      - { rel: 'example', href: 'http://www.example.com/deploy' }

# Create an annotation with a start_time and end_time
- librato_annotation:
    user: user@example.com
    api_key: XXXXXXXXXXXXXXXXXX
    name: 'maintenance'
    title: 'Maintenance window'
    description: 'This is a detailed description of maintenance'
    start_time: 1395940006
    end_time: 1395954406
'''


try:
    import urllib2
    HAS_URLLIB2 = True
except ImportError:
    HAS_URLLIB2 = False

def post_annotation(module):
    user = module.params['user']
    api_key = module.params['api_key']
    name = module.params['name']
    title = module.params['title']

    url = 'https://metrics-api.librato.com/v1/annotations/%s' % name
    params = {}
    params['title'] = title

    if module.params['source'] != None:
        params['source'] = module.params['source']
    if module.params['description'] != None:
        params['description'] = module.params['description']
    if module.params['start_time'] != None:
        params['start_time'] = module.params['start_time']
    if module.params['end_time'] != None:
        params['end_time'] = module.params['end_time']
    if module.params['links'] != None:
        params['links'] = module.params['links']

    json_body = module.jsonify(params)

    headers = {}
    headers['Content-Type'] = 'application/json'
    headers['Authorization'] = b"Basic " + base64.b64encode(user + b":" + api_key).strip()
    req = urllib2.Request(url, json_body, headers)
    try:
        response = urllib2.urlopen(req)
    except urllib2.HTTPError as e:
        module.fail_json(msg="Request Failed", reason=e.reason)
    response = response.read()
    module.exit_json(changed=True, annotation=response)

def main():

  module = AnsibleModule(
      argument_spec = dict(
        user         = dict(required=True),
        api_key      = dict(required=True),
        name         = dict(required=False),
        title        = dict(required=True),
        source       = dict(required=False),
        description  = dict(required=False),
        start_time   = dict(required=False, default=None, type='int'),
        end_time     = dict(require=False, default=None, type='int'),
        links        = dict(type='list')
        )
      )

  post_annotation(module)

from ansible.module_utils.basic import *
main()
