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"""
This provides a version of the API which only throws exceptions;
this is the default so that you have to pick asyncio or twisted
explicitly by calling .use_twisted() or .use_asyncio()
"""

from __future__ import absolute_import, division, print_function
from txaio import _Config

using_twisted = False
using_asyncio = False
config = _Config()


def _throw_usage_error(*args, **kw):
    raise RuntimeError(
        "To use txaio, you must first select a framework "
        "with .use_twisted() or .use_asyncio()"
    )


# all the txaio API methods just raise the error
create_future = _throw_usage_error
create_future_success = _throw_usage_error
create_future_error = _throw_usage_error
create_failure = _throw_usage_error
as_future = _throw_usage_error
is_future = _throw_usage_error
reject = _throw_usage_error
resolve = _throw_usage_error
add_callbacks = _throw_usage_error
gather = _throw_usage_error
is_called = _throw_usage_error

call_later = _throw_usage_error

failure_message = _throw_usage_error
failure_traceback = _throw_usage_error
failure_format_traceback = _throw_usage_error

make_batched_timer = _throw_usage_error

make_logger = _throw_usage_error
start_logging = _throw_usage_error
set_global_log_level = _throw_usage_error
get_global_log_level = _throw_usage_error

add_log_categories = _throw_usage_error

IFailedFuture = _throw_usage_error
ILogger = _throw_usage_error

sleep = _throw_usage_error
