#!/usr/bin/python2
# vim: tabstop=4 shiftwidth=4 softtabstop=4

# Copyright 2015-2017 Lenovo
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import optparse
import os
import signal
import sys

try:
    signal.signal(signal.SIGPIPE, signal.SIG_DFL)
except AttributeError:
    pass
path = os.path.dirname(os.path.realpath(__file__))
path = os.path.realpath(os.path.join(path, '..', 'lib', 'python'))
if path.startswith('/opt'):
    sys.path.append(path)

import confluent.client as client

argparser = optparse.OptionParser(
    usage="Usage: %prog [options] noderange "
          "([status|on|off|shutdown|boot|reset])")
argparser.add_option('-p', '--showprevious', dest='previous',
                     action='store_true', default=False,
                     help='Show previous power state')
argparser.add_option('-m', '--maxnodes', type='int',
                     help='Specify a maximum number of '
                          'nodes to change power state, '
                          'prompting if over the threshold')

(options, args) = argparser.parse_args()
try:
    noderange = args[0]
except IndexError:
    argparser.print_help()
    sys.exit(1)
client.check_globbing(noderange)
setstate = None
if len(args) > 1:
    if setstate == 'softoff':
        setstate = 'shutdown'
    elif not args[1] in ('stat', 'state', 'status'):
        setstate = args[1]

if setstate not in (None, 'on', 'off', 'shutdown', 'boot', 'reset'):
    argparser.print_help()
    sys.exit(1)
session = client.Command()
exitcode = 0
session.add_precede_key('oldstate')

if options.previous:
    # get previous states
    prev = {}
    for rsp in session.read("/noderange/{0}/power/state".format(noderange)):
        # gets previous (current) states

        databynode = rsp["databynode"]

        for node in databynode:
            prev[node] = databynode[node]["state"]["value"]

    # add dictionary to session
    session.add_precede_dict(prev)

sys.exit(session.simple_noderange_command(noderange, '/power/state', setstate, promptover=options.maxnodes))