# -*- coding: utf-8 -*-
import threading
import logging

log = logging.getLogger("utils")

def call_threaded(func, *args, **kwargs):
	#Call the given function in a daemonized thread and return the thread.
	def new_func(*a, **k):
		func(*a, **k)
	thread = threading.Thread(target=new_func, args=args, kwargs=kwargs)
	thread.start()
	return thread

class RepeatingTimer(threading.Thread):
	"""Call a function after a specified number of seconds, it will then repeat again after the specified number of seconds
		Note: If the function provided takes time to execute, this time is NOT taken from the next wait period

	t = RepeatingTimer(30.0, f, args=[], kwargs={})
	t.start()
	t.cancel() # stop the timer's actions
	"""

	def __init__(self, interval, function, daemon=True, *args, **kwargs):
		threading.Thread.__init__(self)
		self.daemon = daemon
		self.interval = float(interval)
		self.function = function
		self.args = args
		self.kwargs = kwargs
		self.finished = threading.Event()

	def cancel(self):
		"""Stop the timer if it hasn't finished yet"""
		log.debug("Stopping repeater for %s" % (self.function,))
		self.finished.set()
	stop = cancel

	def run(self):
		while not self.finished.is_set():
			self.finished.wait(self.interval)
			if not self.finished.is_set():  #In case someone has canceled while waiting
				try:
					self.function(*self.args, **self.kwargs)
				except:
					log.exception("Execution failed. Function: %r args: %r and kwargs: %r" % (self.function, self.args, self.kwargs))