#!/usr/bin/python3
# vim: tabstop=4 shiftwidth=4 softtabstop=4

# Copyright 2019 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
import time

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

exitcode = 0

argparser = optparse.OptionParser(
    usage="Usage: "
          "%prog <noderange> [list][install <license_filename>|save <directory>|delete <license_feature_name>]")
argparser.add_option('-m', '--maxnodes', type='int',
                     help='Specify a maximum number of '
                          'nodes to delete licenses from, '
                          'prompting if over the threshold')                  
(options, args) = argparser.parse_args()
upfile = None
downdir = None
delete = False
try:
    noderange = args[0]
    if len(args) > 1:
        if args[1] == 'install':
            upfile = args[2]
        elif args[1] == 'save':
            downdir = args[2]
        elif args[1] == 'delete':
            delete = args[2]
        elif args[1] != 'list':
            argparser.print_help()
            sys.exit(1)        
except IndexError:
    argparser.print_help()
    sys.exit(1)
client.check_globbing(noderange)


def install_license(session, filename):
    global exitcode
    
    resource = '/noderange/{0}/configuration/' \
               'management_controller/licenses/'.format(noderange)
    filename = os.path.abspath(filename)
    instargs = {'filename': filename}
    if session.unixdomain:
        filesbynode = {}
        for exp in session.create('/noderange/{0}/attributes/expression'.format(noderange),
                        {'expression': filename}):
            if 'error' in exp:
                sys.stderr.write(exp['error'] + '\n')
                exitcode |= exp.get('errorcode', 1)
            ex = exp.get('databynode', ())
            for node in ex:
                filesbynode[node] = ex[node]['value']
                if not isinstance(filesbynode[node], bytes) and not isinstance(filesbynode[node], str):
                    filesbynode[node] = filesbynode[node].encode('utf-8')
        for node in filesbynode:
            endfilename = filesbynode[node]
            of = open(endfilename, 'rb')
            try:
                session.add_file(endfilename, of.fileno(), 'rb')
            except Exception:
                pass
    for res in session.create(resource, instargs):
        for node in res.get('databynode', []):
            if 'error' in res['databynode'][node]:
                sys.stderr.write('{0}: {1}\n'.format(
                    node, res['databynode'][node]['error']))
                sys.exit(res['databynode'][node].get('errorcode', 1))        
    show_licenses(session)


def save_licenses(session, dirname):
    global exitcode
    resource = '/noderange/{0}/configuration/' \
               'management_controller/save_licenses'.format(noderange)
    filename = os.path.abspath(dirname)
    instargs = {'dirname': filename}
    for res in session.create(resource, instargs):
        for node in res.get('databynode', {}):
            fname = res['databynode'][node].get('filename', None)
            if fname:
                print('{0}: Saved license to {1}'.format(node, fname))
            elif 'error' in res['databynode'][node]:
                sys.stderr.write('{0}: {1}\n'.format(node, res['databynode'][node]['error']))
            else:
                sys.stderr.write('{0}: {1}\n'.format(node, repr(res['databynode'][node])))


def show_licenses(session):
    global exitcode
    for res in session.read(
            '/noderange/{0}/configuration/management_controller/licenses/'
            'all'.format(noderange)):
        for node in res.get('databynode', {}):
            for license in res['databynode'][node].get('License', []):
                msg = '{0}: {1}'.format(node, license.get('feature',
                                                          'Unknown'))
                if license.get('state', 'Active') != 'Active':
                    msg += ' ({0})'.format(license['state'])
                print(msg)


def delete_license(session, licname):
    global exitcode
    licstodel = []
    for res in list(session.read(
            '/noderange/{0}/configuration/management_controller/licenses/'
            'all'.format(noderange))):
        for node in res.get('databynode', {}):
            for license in res['databynode'][node].get('License', []):
                if license.get('feature', None) == licname:
                    prefix = '/nodes/{0}/configuration/management_controller/licenses/'.format(node)
                    for currlic in list(session.read(prefix)):
                        currlic = currlic.get('item', {}).get('href', 'all')
                        if currlic == 'all':
                            continue
                        currname = list(session.read(prefix + currlic))[0]
                        currname = currname.get('License', [{}])[0].get('feature', None)
                        if currname == licname:
                            list(session.delete(prefix + currlic))
    show_licenses(session)

try:
    session = client.Command()
    if upfile:
        install_license(session, upfile)
    elif downdir:
        save_licenses(session, downdir)
    elif delete:
        session.stop_if_noderange_over(noderange, options.maxnodes)
        delete_license(session, delete)
    else:
        show_licenses(session)
except KeyboardInterrupt:
    print('')
sys.exit(exitcode)
