def user_response_multi(message, choices):
	for i, choice in enumerate(choices):
		print(f'{i+1}. {choice}')


	nb_choices = len(choices)
	resp = int(input(f'{message} [1-{nb_choices}]\n'))

	if resp not in range(1,nb_choices+1):
		return user_response_multi(message, choices)

	return resp


def user_response_yes_no(message):


	resp = input(message + ' [Y/n]\n').lower()

	if resp not in ['y', 'n']:
		return user_response_yes_no(message)

	return resp == 'y'


def load_packages_from_requirements(filepath):
	# TODO : Handle when multiple version conditions
	# TODO : Handle greater than (>). If version contains >, should take the greatest available version at the date. Should fit with minor versions ?
	with open(filepath, 'r') as f:
		lines = f.readlines()

	split_reg = re.compile(r'==|<=|>=|<|>')

	packages = {}

	for line in lines:
		splitted = re.split(split_reg, line.strip())
		if len(splitted) > 1:
			version = splitted[-1]
		else:
			version = None

		packages[splitted[0]] = version

	return packages


def detect_os():
	pass


def get_python_version():
	pass