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

# Copyright 2015 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 subprocess
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
import confluent.sortutil as sortutil
import confluent.logreader as logreader

confettypath = os.path.join(os.path.dirname(sys.argv[0]), 'confetty')
argparser = optparse.OptionParser(
    usage="Usage: %prog [options] node",
    epilog="Command sequences are available while connected to a console, hit "
           "ctrl-'e', then release ctrl, then 'c', then '?' for a full list. "
           "For example, ctrl-'e', then 'c', then '.' will exit the current "
           "console")
argparser.add_option('-t', '--tile', action='store_true', default=False,
                     help='Tile console windows in the terminal')
argparser.add_option('-l', '--log', action='store_true', default=False,
                     help='Enter log replay mode instead of showing a live console')
(options, args) = argparser.parse_args()
if len(args) != 1:
    argparser.print_help()
    sys.exit(1)
if options.log:
    logname = args[0]
    if not os.path.exists(logname) and logname[0] != '/':
        logname = os.path.join('/var/log/confluent/consoles', logname)
    if not os.path.exists(logname):
        sys.stderr.write('Unable to locate {0} on local system\n'.format(logname))
        sys.exit(1)
    logreader.replay_to_console(logname)
    sys.exit(0)
if options.tile:
    null = open('/dev/null', 'w')
    nodes = []
    sess = client.Command()
    for res in sess.read('/noderange/{0}/nodes/'.format(args[0])):
        node = res.get('item', {}).get('href', '/').replace('/', '')
        if not node:
            sys.stderr.write(res.get('error', repr(res)) + '\n')
            sys.exit(1)
        nodes.append(node)
    initial = True
    pane = 0
    sessname = 'nodeconsole_{0}'.format(os.getpid())
    for node in sortutil.natural_sort(nodes):
        panename = '{0}:{1}'.format(sessname, pane)
        if initial:
            initial = False
            subprocess.call(
                ['tmux', 'new-session', '-d', '-s',
                 sessname, '-x', '800', '-y',
                 '800', '{0} -m 5 start /nodes/{1}/console/session'.format(
                    confettypath, node)])
        else:
            subprocess.call(['tmux', 'select-pane', '-t', sessname])
            subprocess.call(['tmux', 'set-option', '-t', panename, 'pane-border-status', 'top'], stderr=null)
            subprocess.call(
                    ['tmux', 'split', '-h', '-t', sessname,
                 '{0} -m 5 start /nodes/{1}/console/session'.format(
                     confettypath, node)])
            subprocess.call(['tmux', 'select-layout', '-t', sessname, 'tiled'], stdout=null)
            pane += 1
    subprocess.call(['tmux', 'select-pane', '-t', sessname])
    subprocess.call(['tmux', 'set-option', '-t', panename, 'pane-border-status', 'top'], stderr=null)
    os.execlp('tmux', 'tmux', 'attach', '-t', sessname)
else:
    os.execl(confettypath, confettypath, 'start',
             '/nodes/{0}/console/session'.format(args[0]))