"""Messaging library for Python"""
from __future__ import absolute_import

import os
import sys

from collections import namedtuple

version_info_t = namedtuple(
    'version_info_t', ('major', 'minor', 'micro', 'releaselevel', 'serial'),
)

VERSION = version_info_t(4, 0, 0, 'a1', '')
__version__ = '{0.major}.{0.minor}.{0.micro}{0.releaselevel}'.format(VERSION)
__author__ = 'Ask Solem'
__contact__ = 'ask@celeryproject.org'
__homepage__ = 'http://kombu.readthedocs.org'
__docformat__ = 'restructuredtext en'

# -eof meta-

if sys.version_info < (2, 7):  # pragma: no cover
    raise Exception('Kombu 4.0 requires Python versions 2.7 or later.')

STATICA_HACK = True
globals()['kcah_acitats'[::-1].upper()] = False
if STATICA_HACK:  # pragma: no cover
    # This is never executed, but tricks static analyzers (PyDev, PyCharm,
    # pylint, etc.) into knowing the types of these symbols, and what
    # they contain.
    from kombu.connection import Connection, BrokerConnection   # noqa
    from kombu.entity import Exchange, Queue, binding           # noqa
    from kombu.messaging import Consumer, Producer              # noqa
    from kombu.pools import connections, producers              # noqa
    from kombu.utils.url import parse_url                       # noqa
    from kombu.common import eventloop, uuid                    # noqa
    from kombu.serialization import (                           # noqa
        enable_insecure_serializers,
        disable_insecure_serializers,
    )

# Lazy loading.
# - See werkzeug/__init__.py for the rationale behind this.
from types import ModuleType  # noqa

all_by_module = {
    'kombu.connection':    ['Connection', 'BrokerConnection'],
    'kombu.entity':        ['Exchange', 'Queue', 'binding'],
    'kombu.messaging':     ['Consumer', 'Producer'],
    'kombu.pools':         ['connections', 'producers'],
    'kombu.utils.url':     ['parse_url'],
    'kombu.common':        ['eventloop', 'uuid'],
    'kombu.serialization': ['enable_insecure_serializers',
                            'disable_insecure_serializers'],
}

object_origins = {}
for module, items in all_by_module.items():
    for item in items:
        object_origins[item] = module


class module(ModuleType):

    def __getattr__(self, name):
        if name in object_origins:
            module = __import__(object_origins[name], None, None, [name])
            for extra_name in all_by_module[module.__name__]:
                setattr(self, extra_name, getattr(module, extra_name))
            return getattr(module, name)
        return ModuleType.__getattribute__(self, name)

    def __dir__(self):
        result = list(new_module.__all__)
        result.extend(('__file__', '__path__', '__doc__', '__all__',
                       '__docformat__', '__name__', '__path__', 'VERSION',
                       '__package__', '__version__', '__author__',
                       '__contact__', '__homepage__', '__docformat__'))
        return result

# 2.5 does not define __package__
try:
    package = __package__
except NameError:  # pragma: no cover
    package = 'kombu'

# keep a reference to this module so that it's not garbage collected
old_module = sys.modules[__name__]

new_module = sys.modules[__name__] = module(__name__)
new_module.__dict__.update({
    '__file__': __file__,
    '__path__': __path__,
    '__doc__': __doc__,
    '__all__': tuple(object_origins),
    '__version__': __version__,
    '__author__': __author__,
    '__contact__': __contact__,
    '__homepage__': __homepage__,
    '__docformat__': __docformat__,
    '__package__': package,
    'version_info_t': version_info_t,
    'VERSION': VERSION})

if os.environ.get('KOMBU_LOG_DEBUG'):  # pragma: no cover
    os.environ.update(KOMBU_LOG_CHANNEL='1', KOMBU_LOG_CONNECTION='1')
    from .utils import debug
    debug.setup_logging()
