#!/usr/local/bin/python

import sys

from federation import topdl
from federation.remote_service import service_caller
from federation.client_lib import client_opts, exit_with_fault, RPCException, \
	wrangle_standard_options, do_rpc, get_experiment_names, save_certfile

class ns_topdl_opts(client_opts):
    def __init__(self):
        client_opts.__init__(self)
        self.add_option("--file", dest="file", 
                help="experiment description file")
        self.add_option("--output", dest="outfile", type="string",
                help="output topdl file")

parser = ns_topdl_opts()
(opts, args) = parser.parse_args()

cert, fid = wrangle_standard_options(opts)

if opts.file:
    try:
	contents = "".join([l for l in open(opts.file, "r")])
    except EnvironmentError, e:
	sys.exit("Can't read %s: %s" % (opts.file, e))
else:
    sys.exit("Must specify an experiment description (--file)")

msg = { 'description': { 'ns2description': contents }, }

if opts.debug > 1: print >>sys.stderr, msg

try:
    resp_dict = do_rpc(msg, 
	    opts.url, opts.transport, cert, opts.trusted, 
	    serialize_only=opts.serialize_only,
	    tracefile=opts.tracefile,
	    caller=service_caller('Ns2Topdl'),
	    responseBody="Ns2TopdlResponseBody")
except RPCException, e:
    exit_with_fault(e)
except RuntimeError, e:
    sys.exit("Error processing RPC: %s" % e)

if 'experimentdescription' in resp_dict:
    if 'topdldescription' in resp_dict['experimentdescription']:
	exp = resp_dict['experimentdescription']['topdldescription']
	top = topdl.Topology(**exp)
    else:
	sys.exit("Bad response: could not translate")
elif opts.serialize_only:
    sys.exit(0)
else:
    sys.exit("Bad response. %s" % e.message)

if opts.outfile:
    try:
	f = open(opts.outfile, "w")
	print >>f, topdl.topology_to_xml(top, top="experiment")
	f.close()
    except EnvironmentError, e:
	sys.exit("Can't write to %s: %s" % (opts.outfile, e))
else:
    print topdl.topology_to_xml(top, top="experiment")