#!/usr/bin/env python3

import sys

from sfa.client.sfi_commands import Commands

from sfa.rspecs.rspec import RSpec

from sfa.planetlab.plxrn import xrn_to_hostname

command = Commands(usage="%prog [options]",
                   description="List all nodes in the RSpec. " +
                   "Use this to display the list of nodes on which it is " +
                   "possible to create a slice.")
command.prep()

if command.opts.infile:
    rspec = RSpec(command.opts.infile)
    nodes = rspec.version.get_nodes()
    if command.opts.outfile:
        sys.stdout = open(command.opts.outfile, 'w')

    for node in nodes:
        hostname = None
        if node.get('component_id'):
            hostname = xrn_to_hostname(node['component_id'])
        if hostname:
            print(hostname)