from notebook.auth import passwd
from getpass import getpass
from traitlets.config.manager import BaseJSONConfigManager
from jupyter_core.paths import jupyter_config_dir
import argparse
import sys

def set_password(args):
	password = args.password
	while not password  :
		password1 = getpass("" if args.quiet else "Provide password: ")
		password_repeat = getpass("" if args.quiet else "Repeat password:  ")
		if password1 != password_repeat:
			print("Passwords do not match, try again")
		elif len(password1) < 4:
			print("Please provide at least 4 characters")
		else:
			password = password1

	password_hash = passwd(password)
	cfg = BaseJSONConfigManager(config_dir=jupyter_config_dir())
	cfg.update('jupyter_notebook_config', {
		'NotebookApp': {
			'password': password_hash,
		}
	})
	if not args.quiet:
		print("password stored in config dir: %s" % jupyter_config_dir())

def main(argv):
	parser = argparse.ArgumentParser(argv[0])
	subparsers = parser.add_subparsers()
	parser_password = subparsers.add_parser('password', help='sets a password for your notebook server')
	parser_password.add_argument("password", help="password to set, if not given, a password will be queried for (NOTE: this may not be safe)",
			nargs="?")
	parser_password.add_argument("--quiet", help="suppress messages", action="store_true")
	parser_password.set_defaults(function=set_password)
	args = parser.parse_args(argv[1:])
	args.function(args)
	
if __name__ == "__main__":
	main(sys.argv)