import sys

class CryptoBoxLogger:

	DebugLevels	= {"debug":0, "info":3, "warn":6, "error":9}
	DebugFacilities	= {"file":0}

	def __init__(self, level, facility, name=None):
		self.debug_level = int(level)
		if int(facility) == self.DebugFacilities["file"]:
			self.logFunc = self.message2file
			if name is not None:
				self.logFile = name
			else:
				self.logFile = '/var/log/cryptobox.log'
			try:
				fsock = open(self.logFile, "a")
				fsock.close()
				return
			except IOError:
				sys.stderr.write("Unable to open logfile (%s) for writing.\n" % (self.logFile, ))
		else:
			sys.stderr.write("Invalid logging facility: %d.\n" % (facility, ))
		"we will only arrive here, if an error occoured"
		sys.stderr.write("Sorry - bye, bye!\n")
		sys.exit(1)


	def printMessage(self, text, msg_level=None):
		if msg_level is None:	msg_level = self.DebugLevels["debug"]
		if msg_level >= self.debug_level:
			self.logFunc("[CryptoBox] - %s\n" % (text, ))
	

	def message2file(self, text):
		try:
			log_sock = open(self.logFile, "a")
			try:
				log_sock.writelines(text)
				log_sock.close()
				return
			except IOError:
				sys.stderr.write(
					"Unable to write messages to logfile (%s).\n" % (self.logFile, ))
		except IOError:
			sys.stderr.write("Unable to open logfile (%s) for writing.\n" % (self.logFile, ))
		"we will only arrive here, if an error occoured"
		sys.stderr.write("Sorry - bye, bye!\n")
		sys.exit(1)