import functools
import itertools
import logging
import time


log = logging.getLogger(__name__)


def retry(times, timeout=0.2, exceptions=None):
    """A retry decorator.

    :param times: integer number of times to retry
    :param timeout: floating point number of second to wait between calls
    :param exceptions: tuple of exceptions to retry on. defaults to all
    """
    if exceptions is None:
        exceptions = (Exception,)
    else:
        exceptions = tuple(exceptions)

    def wrapper(fn):
        @functools.wraps(fn)
        def decorated(*args, **kwargs):
            for attempt in itertools.count(1):
                log.debug("Calling function '%s' attempt '%s'",
                          fn.__name__, attempt)
                try:
                    return fn(*args, **kwargs)
                except exceptions:
                    if attempt > times:
                        raise
                if timeout:
                    time.sleep(timeout)
        return decorated
    return wrapper