#!/usr/bin/python2
import optparse
import signal
import sys
import os
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
import confluent.sortutil as sortutil


def lookupdata(data, key):
    ret = data.get(key, {}).get('value', '')
    if ret is None:
        ret = ''
    return ret

def main():
    argparser = optparse.OptionParser(
    usage='''\n       %prog noderange -o ansible.hosts
             \n ''')
    argparser.add_option('-o', '--output',
                         help='Ansible hosts file')
    (options, args) = argparser.parse_args()
    try:
        noderange = args[0]
    except IndexError:
        argparser.print_help()
        sys.exit(1)
    if not options.output:
        sys.stderr.write('Output file must be specified by -o\n')
        sys.exit(1)
    sess = client.Command()
    databynode = {}
    for res in sess.read('/noderange/{0}/attributes/all'.format(noderange)):
        for node in res.get('databynode', {}):
            if node not in databynode:
                databynode[node] = {}
            databynode[node].update(res['databynode'][node])
    nodesbygroup = {}
    with open(options.output, 'w') as importfile:
        needempty = False
        for node in sortutil.natural_sort(databynode):
            data = databynode[node]
            if not data.get('groups', []):
                importfile.write(node + '\n')
                needempty = True
            for g in data.get('groups', []):
                if g not in nodesbygroup:
                    nodesbygroup[g] = set([node])
                else:
                    nodesbygroup[g].add(node)
        if needempty:
            importfile.write('\n')
        for group in sortutil.natural_sort(nodesbygroup):
            importfile.write('[{0}]\n'.format(group))
            for node in sortutil.natural_sort(nodesbygroup[group]):
                importfile.write('{0}\n'.format(node))
            importfile.write('\n')


if __name__ == '__main__':
    main()