# Copyright 2018 TrilioData Inc.
# All Rights Reserved.

import sys


def enabled():
    return ('--remote_debug-host' in sys.argv and
            '--remote_debug-port' in sys.argv)


def init():
    import dmapi.conf
    CONF = dmapi.conf.CONF

    # NOTE(markmc): gracefully handle the CLI options not being registered
    if 'remote_debug' not in CONF:
        return

    if not (CONF.remote_debug.host and CONF.remote_debug.port):
        return

    from dmapi.i18n import _LW
    from oslo_log import log as logging
    LOG = logging.getLogger(__name__)

    LOG.debug('Listening on %(host)s:%(port)s for debug connection',
              {'host': CONF.remote_debug.host,
               'port': CONF.remote_debug.port})

    try:
        from pydev import pydevd
    except ImportError:
        import pydevd
    pydevd.settrace(host=CONF.remote_debug.host,
                    port=CONF.remote_debug.port,
                    stdoutToServer=False,
                    stderrToServer=False)

    LOG.warning(_LW('WARNING: Using the remote debug option changes how '
                    'Nova uses the eventlet library to support async IO. This '
                    'could result in failures that do not occur under normal '
                    'operation. Use at your own risk.'))