#!/usr/bin/env python3
"""
Tools for working with time.
"""
from datetime import datetime

from dateutil.relativedelta import relativedelta

import config


def relativeTime(time_1, time_2):
	"""
	Returns the relative time difference between 'time_1' and 'time_2'.
	If either 'time_1' or 'time_2' is a string, it will be converted to a
	datetime object according to the 'default_time_format' variable in the
	config.
	"""
	t_format = config.default_time_format
	if type(time_1) == str:
		time_1 = datetime.strptime(time_1, t_format)
	if type(time_2) == str:
		time_2 = datetime.strptime(time_2, t_format)

	msg = []
	diff = relativedelta(time_1, time_2)
	if diff.years:
		if diff.years > 1:
			msg.append(f"{diff.years} years")
		else:
			msg.append(f"{diff.years} year")

	if diff.months:
		if diff.months > 1:
			msg.append(f"{diff.months} months")
		else:
			msg.append(f"{diff.months} month")

	if diff.days:
		if diff.days > 1:
			msg.append(f"{diff.days} days")
		else:
			msg.append(f"{diff.days} day")

	if not msg:
		if diff.hours:
			if diff.hours > 1:
				msg.append(f"{diff.hours} hours")
			else:
				msg.append(f"{diff.hours} hour")

		if diff.minutes:
			if diff.minutes > 1:
				msg.append(f"{diff.minutes} minutes")
			else:
				msg.append(f"{diff.minutes} minute")

		if not diff.hours:
			if diff.seconds > 1:
				msg.append(f"{diff.seconds} seconds")
			else:
				msg.append(f"{diff.seconds} second")

	msg = ", ".join(msg)
	return msg