# (C) 2012, Michael DeHaan, <michael.dehaan@gmail.com>
# based on the log_plays example
# skvidal@fedoraproject.org
# rbean@redhat.com
# karsten@redhat.com  changes for fedora-messaging

# 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 os
import pwd
import logging

from fedora_messaging.api import Message, publish
from fedora_messaging.exceptions import PublishReturned, ConnectionException

try:
    from ansible.plugins.callback import CallbackBase
except ImportError:
    # Ansible v1 compat
    CallbackBase = object

LOGGER = logging.getLogger(__name__)

def getlogin():
    try:
        user = os.getlogin()
    except OSError as e:
        user = pwd.getpwuid(os.geteuid())[0]
    return user


class CallbackModule(CallbackBase):
    """ Publish playbook starts and stops to fedora-messaging. """

    playbook_path = None

    def __init__(self):
        pass

    def playbook_on_play_start(self, pattern):
        # This gets called once for each play.. but we just issue a message once
        # for the first one.  One per "playbook"
        play = getattr(self, "play", None)
        if play:
            # figure out where the playbook FILE is
            path = os.path.abspath(play.playbook.filename)

            # Bail out early without publishing if we're in --check mode
            if play.playbook.check:
                return

            if not self.playbook_path:
                try:
                    msg = Message(
                        topic="ansible.playbook.start",
                        body={
                            'playbook': path,
                            'userid': getlogin(),
                            'extra_vars': play.playbook.extra_vars,
                            'inventory': play.playbook.inventory.host_list,
                            'playbook_checksum': play.playbook.check,
                            'check': play.playbook.check
                        }
                    )
                    publish(msg)
                except PublishReturned as e:
                    LOGGER.warning(
                        "Fedora Messaging broker rejected message %s: %s", msg.id, e
                    )
                except ConnectionException as e:
                    LOGGER.warning("Error sending message %s: %s", msg.id, e)
                self.playbook_path = path

    def playbook_on_stats(self, stats):
        if not self.playbook_path:
            return

        results = dict([(h, stats.summarize(h)) for h in stats.processed])
        try:
            msg = Message(
                topic="ansible.playbook.complete",
                body={
                    'playbook': self.playbook_path,
                    'userid': getlogin(),
                    'results': results
                }
            )
            publish(msg)
        except PublishReturned as e:
            LOGGER.warning("Fedora Messaging broker rejected message %s: %s", msg.id, e)
        except ConnectionException as e:
            LOGGER.warning("Error sending message %s: %s", msg.id, e)