#!/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.

import csv
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

tabformat = '{0:>15}|{1:>15}|{2:>15}|{3:>36}|{4:>17}|{5:>12}|{6:>48}'
columns = ['Node', 'Model', 'Serial', 'UUID', 'Mac Address', 'Type',
           'Current IP Addresses']
delimit = ['-' * 15, '-' * 15, '-' * 15, '-' * 36, '-' * 17, '-' * 12,
           '-' * 48]


def dumpmacs(procinfo):
    return ','.join(procinfo['macs']) # + procinfo.get('relatedmacs', []))


def print_disco(options, session, currmac):
    procinfo = {}
    for tmpinfo in session.read('/discovery/by-mac/{0}'.format(currmac)):

        procinfo.update(tmpinfo)
    record = [procinfo['nodename'], procinfo['modelnumber'],
              procinfo['serialnumber'], procinfo['uuid'], dumpmacs(procinfo),
              ','.join(procinfo['types']),
              ','.join(sorted(procinfo['ipaddrs']))]
    if options.csv:
        csv.writer(sys.stdout).writerow(record)
    else:
        print(tabformat.format(*record))


def list_discovery(options, session):
    if options.csv:
        csv.writer(sys.stdout).writerow(columns)
    else:
        print(tabformat.format(*columns))
        print(tabformat.format(*delimit))
    for mac in list_matching_macs(options, session):
        print_disco(options, session, mac)


def list_matching_macs(options, session):
    path = '/discovery/'
    if options.model:
        path += 'by-model/{0}/'.format(options.model)
    if options.serial:
        path += 'by-serial/{0}/'.format(options.serial)
    if options.uuid:
        path += 'by-uuid/{0}/'.format(options.uuid)
    if options.type:
        path += 'by-type/{0}/'.format(options.type)
    if options.mac:
        # path += 'by-mac/{0}'.format(options.mac)
        return [options.mac.replace(':', '-')]
    else:
        path += 'by-mac/'
        return [x['item']['href'] for x in session.read(path)]

def assign_discovery(options, session):
    abort = False
    if not (options.serial or options.uuid or options.mac):
        sys.stderr.write(
            "UUID (-u), serial (-s), or ether address (-e) required for "
            "assignment\n")
        abort = True
    if not options.node:
        sys.stderr.write("Node (-n) must be specified for assignment\n")
        abort = True
    if abort:
        sys.exit(1)
    matches = list_matching_macs(options, session)
    if not matches:
        sys.stderr.write("No matching discovery candidates found\n")
        sys.exit(1)
    for res in session.update('/discovery/by-mac/{0}'.format(matches[0]),
                   {'node': options.node}):
        if 'assigned' in res:
            print('Assigned: {0}'.format(res['assigned']))
        else:
            print(repr(res))



def main():
    parser = optparse.OptionParser(
        usage='Usage: %prog [list|assign|rescan] [options]')
    # -a for 'address' maybe?
    parser.add_option('-m', '--model', dest='model',
                      help='Operate with nodes matching the specified model '
                       'number', metavar='MODEL')
    parser.add_option('-s', '--serial', dest='serial',
                      help='Operate against the system matching the specified '
                           'serial number', metavar='SERIAL')
    parser.add_option('-u', '--uuid', dest='uuid',
                      help='Operate against the system matching the specified '
                           'UUID', metavar='UUID')
    parser.add_option('-n', '--node', help='Operate with the given nodename')
    parser.add_option('-e', '--ethaddr', dest='mac',
                      help='Operate against the system with the specified MAC '
                           'address', metavar='MAC')
    parser.add_option('-t', '--type', dest='type',
                      help='Operate against the system of the specified type',
                      metavar='TYPE')
    parser.add_option('-c', '--csv', dest='csv',
                      help='Use CSV formatted output', action='store_true')
    parser.add_option('-i', '--import',
                      help='Import bulk assignment data from given CSV file',
                      metavar='IMPORT.CSV')
    (options, args) = parser.parse_args()
    if len(args) == 0 or args[0] not in ('list', 'assign', 'rescan'):
        parser.print_help()
        sys.exit(1)
    session = client.Command()
    if args[0] == 'list':
        list_discovery(options, session)
    if args[0] == 'assign':
        assign_discovery(options, session)
    if args[0] == 'rescan':
        session.update('/discovery/rescan', {'rescan': 'start'})
        print("Rescan initiated")


if __name__ == '__main__':
    main()