#!/usr/local/bin/python2.7

# (c) 2012, Michael DeHaan <michael.dehaan@gmail.com>
#
# This file is part of Ansible
#
# Ansible 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 3 of the License, or
# (at your option) any later version.
#
# Ansible 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 Ansible.  If not, see <http://www.gnu.org/licenses/>.

########################################################

import sys
import getpass

from ansible.runner import Runner
import ansible.constants as C
from ansible import utils
from ansible import errors
from ansible import callbacks
from ansible import inventory

########################################################

class Cli(object):
    ''' code behind bin/ansible '''

    # ----------------------------------------------

    def __init__(self):
        self.stats = callbacks.AggregateStats()
        self.callbacks = callbacks.CliRunnerCallbacks()

    # ----------------------------------------------

    def parse(self):
        ''' create an options parser for bin/ansible '''

        parser = utils.base_parser(constants=C, runas_opts=True, subset_opts=True, async_opts=True,
            output_opts=True, connect_opts=True, usage='%prog <host-pattern> [options]')
        parser.add_option('-a', '--args', dest='module_args',
            help="module arguments", default=C.DEFAULT_MODULE_ARGS)
        parser.add_option('-m', '--module-name', dest='module_name',
            help="module name to execute (default=%s)" % C.DEFAULT_MODULE_NAME,
            default=C.DEFAULT_MODULE_NAME)
        options, args = parser.parse_args()
        self.callbacks.options = options

        if len(args) == 0 or len(args) > 1:
            parser.print_help()
            sys.exit(1)
        return (options, args)

    # ----------------------------------------------

    def run(self, options, args):
        ''' use Runner lib to do SSH things '''

        pattern = args[0]

        inventory_manager = inventory.Inventory(options.inventory)
        hosts = inventory_manager.list_hosts(pattern)
        if len(hosts) == 0:
            print >>sys.stderr, "No hosts matched"
            sys.exit(1)

        sshpass = None
        sudopass = None
        options.ask_pass = options.ask_pass or C.DEFAULT_ASK_PASS
        if options.ask_pass:
            sshpass = getpass.getpass(prompt="SSH password: ")
        options.ask_sudo_pass= options.ask_sudo_pass or C.DEFAULT_ASK_SUDO_PASS
        if options.ask_sudo_pass:
            sudopass = getpass.getpass(prompt="sudo password: ")
            options.sudo = True
        if options.sudo_user:
            options.sudo = True
        options.sudo_user = options.sudo_user or C.DEFAULT_SUDO_USER
        if options.tree:
            utils.prepare_writeable_dir(options.tree)

        runner = Runner(
            module_name=options.module_name, module_path=options.module_path,
            module_args=options.module_args,
            remote_user=options.remote_user, remote_pass=sshpass,
            inventory=inventory_manager, timeout=options.timeout,
            private_key_file=options.private_key_file,
            forks=options.forks,
            pattern=pattern,
            callbacks=self.callbacks, sudo=options.sudo,
            sudo_pass=sudopass,sudo_user=options.sudo_user,
            transport=options.connection, subset=options.subset
        )

        if options.seconds:
            print "background launch...\n\n"
            results, poller = runner.run_async(options.seconds)
            results = self.poll_while_needed(poller, options)
        else:
            results = runner.run()

        return (runner, results)

    # ----------------------------------------------

    def poll_while_needed(self, poller, options):
        ''' summarize results from Runner '''

        # BACKGROUND POLL LOGIC when -B and -P are specified
        if options.seconds and options.poll_interval > 0:
            poller.wait(options.seconds, options.poll_interval)

        return poller.results


########################################################

if __name__ == '__main__':
    cli = Cli()
    (options, args) = cli.parse()
    try:
        (runner, results) = cli.run(options, args)
        for result in results['contacted'].values():
            if 'failed' in result or result.get('rc', 0) != 0:
                sys.exit(2)
        if results['dark']:
            sys.exit(2)
    except errors.AnsibleError, e:
        # Generic handler for ansible specific errors
        print "ERROR: %s" % str(e)
        sys.exit(1)

