#!/usr/bin/python
#
# Parse DIRAC JobAgent log file and output codes and messages
# to use with HEPiX VM shutdown_command.
#
# See https://www.gridpp.ac.uk/wiki/HEPiX_shutdown_command
#
# This script takes the full path of the JobAgent.py log file
# as its single argument, and outputs the code+message on 
# stdout. 
#
# The last matching pattern determines the code+message.
# 
# Andrew.McNab@cern.ch - May 2013
#
# (Yes, it would be better if JobAgent.py returned these 
#  codes explicitly, rather than relying on parsing logs!)
#

import sys

# catch-all in case nothing matches
shutdownMessage = '700 Failed, probably JobAgent or Application problem'

# log file patterns to look for and corresponding messages
messageMappings = [

# Variants of: "100 Shutdown as requested by the VM's host/hypervisor"
######################################################################
# There are other errors from the TimeLeft handling, but we let those go 
# to the 600 Failed default
['INFO: JobAgent will stop with message "No time left for slot', '100 No time left for slot'],

# Variants of: "200 Intended work completed ok"
###############################################
# Our work is done. More work available in the TQ? Who knows!
['INFO: JobAgent will stop with message "Filling Mode is Disabled', '200 Fillling Mode is Disabled'],
['NOTICE:  Cycle was successful', '200 Success'],

#
# !!! Codes 300-699 trigger Vac's backoff procedure !!!
#

# Variants of: "300 No more work available from task queue"
###########################################################
# We asked, but nothing more from the matcher. 
['INFO: JobAgent will stop with message "Nothing to do for more than', '300 Nothing to do'],
# Treat version mismatch as no work available, since pilot version updated by LHCb via CVMFS
['ERROR: Pilot version does not match the production version', '300 Cannot match jobs with this pilot version'],

# Currently, there are no outcomes relating to 
#     "400 Site/host/VM is currently banned/disabled from receiving more work"
# or  "500 Problem detected with environment/VM/contextualization provided by the site"
# or  "600 Grid-wide problem with job agent or application within VM"
#######################################################################################

# Variants of: "700 Error related to job agent or application within VM"
########################################################################
# Some of the ways the JobAgent/Application can stop with errors. 
# Otherwise we just get the default 700 Failed message.
['INFO: JobAgent will stop with message "Job Rescheduled', '600 Problem so job rescheduled'],
['INFO: JobAgent will stop with message "Matcher Failed', '600 Matcher Failed'],
['INFO: JobAgent will stop with message "JDL Problem', '600 JDL Problem'],
['INFO: JobAgent will stop with message "Payload Proxy Not Found', '600 Payload Proxy Not Found'],
['INFO: JobAgent will stop with message "Problem Rescheduling Job', '600 Problem Rescheduling Job'],
['INFO: JobAgent will stop with message "Payload execution failed with error code', '600 Payload execution failed with error'],

]

if len(sys.argv) <= 1 or not sys.argv[1]:
    sys.exit(1)

try:
    f = open(sys.argv[1], 'r')
except:
    sys.exit(2)

oneline = f.readline()

while oneline:

    for pair in messageMappings:
      if pair[0] in oneline:
         shutdownMessage = pair[1]
         break

    oneline = f.readline()    

f.close()

print shutdownMessage
sys.exit(0)
