#!/usr/bin/env python
#
# Copyright (c) 2011-2012, PagerDuty, Inc. <info@pagerduty.com>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above copyright
#       notice, this list of conditions and the following disclaimer in the
#       documentation and/or other materials provided with the distribution.
#     * Neither the name of PagerDuty Inc nor the
#       names of its contributors may be used to endorse or promote products
#       derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL PAGERDUTY INC BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
import requests
import sys
 
def get_incident_count(since, until, headers):
    """
        Retrieve the count of incidents in a given time-period, as an 'int'.
        Dates should be in the format 'YYYY-MM-DD'.
    """
    payload = {'since': since, 'until': until}
    get_incident_count_url = 'https://rentrak-isg.pagerduty.com/api/v1/incidents/count'
    r = requests.get(get_incident_count_url, params=payload, headers=headers)
    return int(r.json()['total'])
 
def get_incident_ids(since, until, headers):
    """
        Based on an incident-count used to create an 'offset',
        retrieve incident-IDs, in batches-of-100, and return as a list.
        Dates should be in the format 'YYYY-MM-DD'.
    """
    id_list = []
    count = get_incident_count(since, until, headers)
    get_incident_ids_url = 'https://rentrak-isg.pagerduty.com/api/v1/incidents'
    payload = {'since': since, 'until': until}
    for ea_hun in xrange(0,count) or int(ea_hun)==count:
        if int(ea_hun)%100==0:
            payload['offset'] = ea_hun
            r = requests.get(get_incident_ids_url, params=payload, headers=headers, stream=True)
            id_list = id_list + [ea_inc['id'] for ea_inc in r.json()['incidents']]
    return id_list
 
def get_details_by_incident(since, until):
    """
        Based on a list of incident-IDs, retrieve incident details.
        Process json-payload and output to CSV file.
        CLI Usage (Linux example): "./get_incident_details_csv.py 2011-10-01 2011-10-04".
    """
    headers = {
        'Authorization': 'Token token=****',
        'Content-type': 'application/json',
    }
    id_list = get_incident_ids(since, until, headers)
    test_file = open('test.txt', 'w')
    fin_file = open('incident_report_{0}_to_{1}_details.csv'.format(since, until), 'w')
    fin_file.write('IncidentID,Created-At,Summary\n')
    for ea_id in id_list:
        r = requests.get('https://rentrak-isg.pagerduty.com/api/v1/incidents/{0}/log_entries?include[]=channel'.format(ea_id), headers=headers, stream=True)
        test_file.write(str(r.json()))
        for ea_entry in reversed(r.json()['log_entries']):    
            if ea_entry['type'] == 'trigger':
                if ea_entry['channel']['type']=='nagios':
                    fin_file.write(','.join([ea_id, ea_entry['created_at'], '"{0}"'.format(ea_entry['channel']['summary'])]) + '\n')
                if ea_entry['channel']['type']=='api':
                    fin_file.write(','.join([ea_id, ea_entry['created_at'], '"{0}"'.format(ea_entry['channel']['description'])]) + '\n')
                if ea_entry['channel']['type']=='web_trigger':
                    fin_file.write(','.join([ea_id, ea_entry['created_at'], '"{0}"'.format(ea_entry['channel']['summary'])]) + '\n')
                if ea_entry['channel']['type']=='email':
                    fin_file.write(','.join([ea_id, ea_entry['created_at'], '"{0}"'.format(ea_entry['channel']['summary'])]) + '\n')
            else:
                pass
    fin_file.close()
 
 
if __name__ == '__main__':
    get_details_by_incident(sys.argv[1], sys.argv[2])