# Copyright (c) 2009-2012 Denis Bilenko. See LICENSE for details.
"""
gevent is a coroutine-based Python networking library that uses greenlet
to provide a high-level synchronous API on top of libev event loop.

See http://www.gevent.org/ for the documentation.

.. versionchanged:: 1.3a2
   Add the `config` object.
"""

from __future__ import absolute_import

from collections import namedtuple

_version_info = namedtuple('version_info',
                           ('major', 'minor', 'micro', 'releaselevel', 'serial'))

#: The programatic version identifier. The fields have (roughly) the
#: same meaning as :data:`sys.version_info`
#: .. deprecated:: 1.2
#:  Use ``pkg_resources.parse_version(__version__)`` (or the equivalent
#:  ``packaging.version.Version(__version__)``).
version_info = _version_info(1, 4, 0, 'dev', 0)

#: The human-readable PEP 440 version identifier.
#: Use ``pkg_resources.parse_version(__version__)`` or
#: ``packaging.version.Version(__version__)`` to get a machine-usable
#: value.
__version__ = '1.4.0'


__all__ = [
    'get_hub',
    'Greenlet',
    'GreenletExit',
    'spawn',
    'spawn_later',
    'spawn_raw',
    'iwait',
    'wait',
    'killall',
    'Timeout',
    'with_timeout',
    'getcurrent',
    'sleep',
    'idle',
    'kill',
    'signal', # deprecated
    'signal_handler',
    'fork',
    'reinit',
    'getswitchinterval',
    'setswitchinterval',
    # Added in 1.3a2
    'config',
]


import sys
if sys.platform == 'win32':
    # trigger WSAStartup call
    import socket  # pylint:disable=unused-import,useless-suppression
    del socket

try:
    # Floating point number, in number of seconds,
    # like time.time
    getswitchinterval = sys.getswitchinterval
    setswitchinterval = sys.setswitchinterval
except AttributeError:
    # Running on Python 2
    _switchinterval = 0.005

    def getswitchinterval():
        return _switchinterval

    def setswitchinterval(interval):
        # Weed out None and non-numbers. This is not
        # exactly exception compatible with the Python 3
        # versions.
        if interval > 0:
            global _switchinterval
            _switchinterval = interval

from gevent._config import config
from gevent._hub_local import get_hub
from gevent._hub_primitives import iwait_on_objects as iwait
from gevent._hub_primitives import wait_on_objects as wait

from gevent.greenlet import Greenlet, joinall, killall
joinall = joinall # export for pylint
spawn = Greenlet.spawn
spawn_later = Greenlet.spawn_later
#: The singleton configuration object for gevent.
config = config

from gevent.timeout import Timeout, with_timeout
from gevent.hub import getcurrent, GreenletExit, spawn_raw, sleep, idle, kill, reinit
try:
    from gevent.os import fork
except ImportError:
    __all__.remove('fork')

# See https://github.com/gevent/gevent/issues/648
# A temporary backwards compatibility shim to enable users to continue
# to treat 'from gevent import signal' as a callable, to matter whether
# the 'gevent.signal' module has been imported first
from gevent.hub import signal as _signal_class
signal_handler = _signal_class
from gevent import signal as _signal_module

# The object 'gevent.signal' must:
# - be callable, returning a gevent.hub.signal;
# - answer True to isinstance(gevent.signal(...), gevent.signal);
# - answer True to isinstance(gevent.signal(...), gevent.hub.signal)
# - have all the attributes of the module 'gevent.signal';
# - answer True to isinstance(gevent.signal, types.ModuleType) (optional)

# The only way to do this is to use a metaclass, an instance of which (a class)
# is put in sys.modules and is substituted for gevent.hub.signal.
# This handles everything except the last one.


class _signal_metaclass(type):

    def __getattr__(cls, name):
        return getattr(_signal_module, name)

    def __setattr__(cls, name, value):
        setattr(_signal_module, name, value)

    def __instancecheck__(cls, instance):
        return isinstance(instance, _signal_class)

    def __dir__(cls):
        return dir(_signal_module)


class signal(object):

    __doc__ = _signal_module.__doc__

    def __new__(cls, *args, **kwargs):
        return _signal_class(*args, **kwargs)


# The metaclass is applied after the class declaration
# for Python 2/3 compatibility
signal = _signal_metaclass(str("signal"),
                           (),
                           dict(signal.__dict__))

sys.modules['gevent.signal'] = signal
sys.modules['gevent.hub'].signal = signal

del sys


# the following makes hidden imports visible to freezing tools like
# py2exe. see https://github.com/gevent/gevent/issues/181
# This is not well maintained or tested, though, so it likely becomes
# outdated on each major release.

def __dependencies_for_freezing(): # pragma: no cover
    # pylint:disable=unused-import
    from gevent import core
    from gevent import resolver_thread
    from gevent import resolver_ares
    from gevent import socket as _socket
    from gevent import threadpool
    from gevent import thread
    from gevent import threading
    from gevent import select
    from gevent import subprocess
    import pprint
    import traceback
    import signal as _signal

del __dependencies_for_freezing
