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

# Copyright 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.

__author__ = 'alin37'

from getpass import getpass
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='''\n       %prog [-b] noderange [list of attributes or 'all']  \
             \n       %prog -c noderange <list of attributes>  \
             \n       %prog -e noderange <attribute names to set>  \
             \n       %prog noderange attribute1=value1 attribute2=value,...
             \n ''')
argparser.add_option('-b', '--blame', action='store_true',
                     help='Show information about how attributes inherited')
argparser.add_option('-e', '--environment', action='store_true',
                     help='Set attributes, but from environment variable of '
                          'same name')
argparser.add_option('-c', '--clear', action='store_true',
                     help='Clear attributes')
argparser.add_option('-p', '--prompt', action='store_true',
                     help='Prompt for attribute values interactively')
argparser.add_option('-m', '--maxnodes', type='int',
                     help='Prompt if trying to set attributes on more '
                          'than specified number of nodes')
(options, args) = argparser.parse_args()


#setting minimal output to only output current information
showtype = 'current'
requestargs=None
try:
    noderange = args[0]
    nodelist = '/noderange/{0}/nodes/'.format(noderange)
except IndexError:
    argparser.print_help()
    sys.exit(1)
client.check_globbing(noderange)
session = client.Command()
exitcode = 0

#Sets attributes
nodetype="noderange"

if len(args) > 1:
    if "=" in args[1] or options.clear or options.environment or options.prompt:
        if "=" in args[1] and options.clear:
            print("Can not clear and set at the same time!")
            argparser.print_help()
            sys.exit(1)
        argassign = None
        if options.prompt:
            argassign = {}
            for arg in args[1:]:
                oneval = 1
                twoval = 2
                while oneval != twoval:
                    oneval = getpass('Enter value for {0}: '.format(arg))
                    twoval = getpass('Confirm value for {0}: '.format(arg))
                    if oneval != twoval:
                        print('Values did not match.')
                argassign[arg] = twoval
        session.stop_if_noderange_over(noderange, options.maxnodes)
        exitcode=client.updateattrib(session,args,nodetype, noderange, options, argassign)
    try:
        # setting user output to what the user inputs
        if args[1] == 'all':
            showtype = 'all'
            requestargs=args[2:]
        elif args[1] == 'current':
            showtype = 'current'
            requestargs=args[2:]
        else:
            showtype = 'all'
            requestargs=args[1:]
    except:
        pass
elif options.clear or options.environment or options.prompt:
    sys.stderr.write('Attribute names required with specified options\n')
    argparser.print_help()
    exitcode = 400
if exitcode != 0:
    sys.exit(exitcode)

# Lists all attributes
if len(args) > 0:
    # setting output to all so it can search since if we do have something to search, we want to show all outputs even if it is blank.
    if requestargs is None:
        showtype = 'current'
    elif requestargs == []:
        #showtype already set
        pass
    else:
        try:
            requestargs.remove('all')
            requestargs.remove('current')
        except ValueError:
            pass
    exitcode = client.printattributes(session, requestargs, showtype,nodetype, noderange, options)
else:
    for res in session.read(nodelist):
        if 'error' in res:
            sys.stderr.write(res['error'] + '\n')
            exitcode = 1
        else:
            print(res['item']['href'].replace('/', ''))

sys.exit(exitcode)