#!/usr/bin/python
# mclu (mini cluster)
# Copyright (C) 2014 Red Hat Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

import argparse
import ConfigParser
import os
import re
import sys

import config
import mclu_build
import mclu_console
import mclu_import
import mclu_info
import mclu_list
import mclu_migrate
import mclu_off
import mclu_on
import mclu_reboot
import mclu_start
import mclu_status
import mclu_stop
import mclu_viewer

parser = argparse.ArgumentParser (
    prog='mclu',
    description='Mini virtualization cluster management tool',
)
parser.add_argument (
    '-f',
    type=file,
    help='specify location of the configuration file',
    metavar='MCLU.CONF',
)

# Add subcommands.
subparsers = parser.add_subparsers ()
mclu_build.cmdline (subparsers)
mclu_console.cmdline (subparsers)
mclu_import.cmdline (subparsers)
mclu_info.cmdline (subparsers)
mclu_list.cmdline (subparsers)
mclu_migrate.cmdline (subparsers)
mclu_off.cmdline (subparsers)
mclu_on.cmdline (subparsers)
mclu_reboot.cmdline (subparsers)
mclu_start.cmdline (subparsers)
mclu_status.cmdline (subparsers)
mclu_stop.cmdline (subparsers)
mclu_viewer.cmdline (subparsers)

args = parser.parse_args()

# Default location of the config file if not defined on the command line:
if not args.f:
    config_dir = config.sysconfdir + "/" + config.PACKAGE_NAME
    args.f = open (config_dir + "/" + "mclu.conf")
else:
    # config_dir is the directory containing mclu.conf
    config_dir = os.path.dirname (args.f.name)

# Configuration file default settings.  You cannot set defaults per
# section, so we have to rely on setting names not overlapping.
conf_defaults = {
    "home" : os.getenv ("HOME"),
    "config_dir" : config_dir,
}

# Read the configuration file.
conf = ConfigParser.SafeConfigParser (conf_defaults)
conf.readfp (args.f)

# Global configuration.
images_dir = conf.get ("global", "images_dir")
if not os.path.isdir (images_dir):
    sys.exit ("configuration error: [globals] 'images_dir' (%s) directory does not exist" % images_dir)
xmls_dir = conf.get ("global", "xmls_dir")
if not os.path.isdir (xmls_dir):
    sys.exit ("configuration error: [globals] 'xmls_dir' (%s) directory does not exist", xmls_dir)
nodes_group = conf.get ("global", "nodes_group")

# A config dict with less-used configuration settings.
c = {
    "config_file" : args.f.name,
    "config_dir" : config_dir,
    "images_dir" : images_dir,
    "nodes_group" : nodes_group,
    "xmls_dir" : xmls_dir,

    "conf" : conf,
}

# Run the subcommand.
args.run (c, args)