"""Decorator for timing functions.

INFO level logging.
"""

import time

from decorator import decorator
from flask import g


@decorator
def timed_fn(f, *args, **kw):
    """Time a function to 6 digits of precision and print to info log."""
    t1 = time.time()
    res = f(*args, **kw)
    t2 = time.time()
    msg = '{}.{} runtime {:.6f} seconds'.format(
        f.__module__, f.__name__, t2 - t1)
    g.log.info(msg)
    return res