#!/usr/bin/python
# mclu (mini cluster)
# Copyright (C) 2014 Red Hat Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

import argparse
import fnmatch
import subprocess

import libvirt

import lib

def cmdline (subparsers):
    p = subparsers.add_parser (
        'reboot',
        help='reboot virtual machine(s)',
    )
    p.add_argument (
        '--force', action='store_const', const=True,
        help='reset the virtual machine(s) forcibly'
    )
    p.add_argument (
        'wildcards', nargs='+',
        help='virtual machine(s) to be rebooted'
    )
    p.set_defaults (run=run)

def run (c, args):
    running, _ = lib.get_all_guests (c)

    for vm in running.values():
        node_name = vm['node']
        vm_name = vm['vm']
        # Form the name of this VM (eg. "ham0:vm") so we can match it
        # against the wildcards (eg. "ham0:*")
        name = node_name + ":" + vm_name
        for wc in args.wildcards:
            if fnmatch.fnmatch (name, wc) or fnmatch.fnmatch (vm_name, wc):
                if args.force:
                    subprocess.check_call (["virsh",
                                            "-c", lib.uri_of_node (node_name),
                                            "reset", vm_name])
                else:
                    subprocess.check_call (["virsh",
                                            "-c", lib.uri_of_node (node_name),
                                            "reboot", vm_name])