#!/usr/bin/env python

import sys

from deter import fedid
from federation.proof import proof
from federation.remote_service import service_caller
from federation.client_lib import client_opts, exit_with_fault, RPCException, \
	wrangle_standard_options, do_rpc, log_authentication

class terminate_opts(client_opts):
    def __init__(self):
        client_opts.__init__(self)
        self.add_option("--experiment_cert", dest="exp_certfile",
		action='callback', callback=self.expand_file, type='str',
                help="experiment certificate file")
        self.add_option("--experiment_name", dest="exp_name",
                type="string", help="human readable experiment name")
        self.add_option("--force", dest="force",
                action="store_true", default=False,
                help="Force termination if experiment is in strange state")
        self.add_option("--logfile", dest="logfile", default=None,
		action='callback', callback=self.expand_file, type='str',
                help="File to write log to")
        self.add_option("--print_log", dest="print_log", default=False,
                action="store_true",
                help="Print deallocation log to standard output")

# Main line
parser = terminate_opts()
(opts, args) = parser.parse_args()

try:
    cert, fid, url = wrangle_standard_options(opts)
except RuntimeError, e:
    sys.exit("%s" %e)

if opts.exp_name and opts.exp_certfile:
    sys.exit("Only one of --experiment_cert and --experiment_name permitted")
elif opts.exp_certfile:
    exp_id = { 'fedid': fedid(file=opts.exp_certfile) }
elif opts.exp_name:
    exp_id = { 'localname' : opts.exp_name }
else:
    sys.exit("Must give one of --experiment_cert or --experiment_name");


if opts.print_log and opts.logfile:
    sys.exit("Only one of --logfile and --print_log is permitted")
elif opts.print_log:
    out = sys.stdout
elif opts.logfile:
    try:
	out = open(opts.logfile, "w")
    except EnvironmentError, e:
	sys.exit("Cannot open logfile: %s" %e)
else:
    out = None

req = { 'experiment': exp_id, 'force': opts.force }
try:
    resp_dict = do_rpc(req,
	    url, opts.transport, cert, opts.trusted, 
	    serialize_only=opts.serialize_only,
	    tracefile=opts.tracefile,
	    caller=service_caller('Terminate'), 
	    responseBody='TerminateResponseBody')
except RPCException, e:
    exit_with_fault(e, 'Terminate', opts)
except RuntimeError, e:
    sys.exit("Error processing RPC: %s" % e)

if out:
    log = resp_dict.get('deallocationLog', None)
    if log:
	print >>out, log
	out.close()
    else:
	out.close()
	sys.exit("No log returned")
proof = proof.from_dict(resp_dict.get('proof', {}))
if proof and opts.auth_log:
    log_authentication(opts.auth_log, 'Terminate', 'succeeded', proof)