# Licensed under GPLv3
# Written by Sebastian Lohff (seba@someserver.de)
# http://seba-geek.de/projects/seopardy/

from __future__ import print_function

import sys

def _config_error(msg):
	print("Configuration error: %s" % (msg,), file=sys.stderr)
	sys.exit(1)

def _check_missing_keys(conf, sec, mandatory, users_choice=[]):
	#d = conf[sec] if sec is not None else conf
	#if sec is None:
	#	sec = "main"

	d = conf

	allowed = mandatory + users_choice

	for key in d.iterkeys():
		if key not in allowed:
			_config_error("Key %s is not an allowed config key in section %s (allowed are %s)" % (key, sec, ", ".join(allowed)))

	for key in mandatory:
		if key not in d.iterkeys():
			_config_error("Key %s is not present in section %s but mandatory" % (key, sec,))


def check_config(conf):
	main_keys = ["music", "savedir", "playerInput"]
	music_keys = ["startSong", "questionSong", "closingSong"]

	_check_missing_keys(conf, "main", main_keys)
	_check_missing_keys(conf["music"], "music", music_keys)

	if conf["playerInput"]:
		for i, inp in enumerate(conf["playerInput"], 1):
			_check_missing_keys(inp, "playerInput %d" % i, ["Type"], ["Args"])