# -*- coding: utf-8 -*-
'''
Module for sending events using the runner system.

.. versionadded:: 2016.11.0
'''
from __future__ import absolute_import, print_function, unicode_literals

import logging

import salt.utils.event


log = logging.getLogger(__name__)


def send(tag, data=None):
    '''
    Send an event with the given tag and data.

    This is useful for sending events directly to the master from the shell
    with salt-run. It is also quite useful for sending events in orchestration
    states where the ``fire_event`` requisite isn't sufficient because it does
    not support sending custom data with the event.

    Note that event tags will *not* be namespaced like events sent with the
    ``fire_event`` requisite! Whereas events produced from ``fire_event`` are
    prefixed with ``salt/state_result/<jid>/<minion_id>/<name>``, events sent
    using this runner module will have no such prefix. Make sure your reactors
    don't expect a prefix!

    :param tag: the tag to send with the event
    :param data: an optional dictionary of data to send with the event

    CLI Example:

    .. code-block:: bash

        salt-run event.send my/custom/event '{"foo": "bar"}'

    Orchestration Example:

    .. code-block:: yaml

        # orch/command.sls

        run_a_command:
          salt.function:
            - name: cmd.run
            - tgt: my_minion
            - arg:
              - exit {{ pillar['exit_code'] }}

        send_success_event:
          salt.runner:
            - name: event.send
            - tag: my_event/success
            - data:
                foo: bar
            - require:
              - salt: run_a_command

        send_failure_event:
          salt.runner:
            - name: event.send
            - tag: my_event/failure
            - data:
                baz: qux
            - onfail:
              - salt: run_a_command

    .. code-block:: bash

        salt-run state.orchestrate orch.command pillar='{"exit_code": 0}'
        salt-run state.orchestrate orch.command pillar='{"exit_code": 1}'
    '''
    data = data or {}
    event = salt.utils.event.get_master_event(__opts__, __opts__['sock_dir'],
                                              listen=False)
    return event.fire_event(data, tag)
