#!/usr/bin/env python
# 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'

import optparse
import os
import sys

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

def attrrequested(attr, attrlist, seenattributes):
    for candidate in attrlist:
        truename = candidate
        if candidate.startswith('hm'):
            candidate = candidate.replace('hm', 'hardwaremanagement', 1)
        if candidate == attr:
            seenattributes.add(truename)
            return True
        elif '.' not in candidate and attr.startswith(candidate + '.'):
            seenattributes.add(truename)
            return True
    return False
argparser = optparse.OptionParser(
    usage='''\n       %prog [options] noderange [list of attributes]  \
             \n       %prog [options] noderange attribute1=value1,attribute2=value,...
             \n ''')
argparser.add_option('-b', '--blame', action='store_true',
                     help='Show information about how attributes inherited')
argparser.add_option('-c', '--clear', action='store_true',
                     help='Clear variables')
(options, args) = argparser.parse_args()

showtype = 'current'
requestargs=None
try:
    noderange = args[0]
    nodelist = '/noderange/{0}/nodes/'.format(noderange)
except IndexError:
    nodelist = '/nodes/'
session = client.Command()
exitcode = 0


#Sets attributes
if len(args) > 1:
    #clears attribute
    if options.clear:
        targpath = '/noderange/{0}/attributes/all'.format(noderange)
        keydata = {}
        for attrib in args[1:]:
            keydata[attrib] = None
        for res in session.update(targpath, keydata):
            if 'error' in res:
                if 'errorcode' in res:
                    exitcode = res['errorcode']
                sys.stderr.write('Error: ' + res['error'] + '\n')
        sys.exit(exitcode)
    else:
        if args[1]  == 'all':
            showtype = 'all'
        elif args[1] == 'current':
            showtype = 'current'
        elif "=" in args[1]:
            try:
                if len(args[1:]) > 1:
                    for val in args[1:]:
                        val = val.split('=')
                        exitcode=session.simple_noderange_command(noderange, 'attributes/all'.format(noderange), val[1], val[0])
                else:
                    val=args[1].split('=')
                    exitcode=session.simple_noderange_command(noderange, 'attributes/all'.format(noderange),val[1],val[0])
            except:
                sys.stderr.write('Error: {0} not a valid expression\n'.format(str (args[1:])))
                exitcode = 1
            sys.exit(exitcode)
        else:
            requestargs = args[1:]

# Lists all attributes
if len(args) > 0:
    seenattributes = set([])
    for res in session.read('/noderange/{0}/attributes/{1}'.format(noderange,showtype)):
        if 'error' in res:
            print "found error"
            sys.stderr.write(res['error'] + '\n')
            exitcode = 1
            continue
        for node in res['databynode']:
            for attr in res['databynode'][node]:
                seenattributes.add(attr)
                currattr = res['databynode'][node][attr]
                if requestargs is None or attrrequested(attr, args[1:], seenattributes):
                    if 'value' in currattr:
                        if currattr['value'] is not None:
                           attrout = '{0}: {1}: {2}'.format(
                                node, attr, currattr['value'])
                        else:
                            attrout = '{0}: {1}:'.format(node, attr)
                    elif 'isset' in currattr:
                        if currattr['isset']:
                            attrout = '{0}: {1}: ********'.format(node, attr)
                        else:
                            attrout = '{0}: {1}:'.format(node, attr)
                    if options.blame:
                        blamedata = []
                        if 'inheritedfrom' in currattr:
                            blamedata.append('inherited from group {0}'.format(
                                currattr['inheritedfrom']
                            ))
                        if 'expression' in currattr:
                            blamedata.append(
                                'derived from expression "{0}"'.format(
                                    currattr['expression']))
                        if blamedata:
                            attrout += ' (' + ', '.join(blamedata) + ')'
                    print attrout

    if not exitcode:
        if requestargs:
            for attr in args[1:]:
                if attr not in seenattributes:
                    sys.stderr.write('Error: {0} not a valid attribute\n'.format(attr))
                    exitcode = 1
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)