#! /usr/bin/env python3
# encoding: utf-8

# --------------------------------------------------

import os

# --------------------------------------------------

def boolean(arg):
	"""
	Converts
	- "True", "true" or "1" ⇒ True
	- "False", "false" or "0" ⇒ False
	
	@while converting argument to bool
	"""
	
	if arg in (True, "True", "true", "1"):
		return True
	elif arg in (False, "False", "false", "0"):
		return False
	else:
		raise ValueError(arg)

def booleans(*args):
	"""
	Converts each
	- "True", "true" or "1" ⇒ True
	- "False", "false" or "0" ⇒ False
	
	@while converting arguments to bools
	"""
	
	out = []
	
	for arg in args:
		out.append(boolean(arg))
	
	return out

def strings(*args):
	"""
	Converts each element to str.
	
	@while converting arguments to strings
	"""
	
	out = []
	
	for arg in args:
		out.append(str(arg))
	
	return out

def directory(exists=False, writable=False, gio=False):
	"""
	Returns a directory callback that raises hell if:
	- the supplied directory doesn't exist and `exists` is True
	- isn't writable and `writable` is True
	- isn't a valid Gio path and `gio` is True
	
	@while generating a callback
	"""
	
	if gio:
		raise NotImplementedError("Gio support is not yet here")
	
	def cb(arg):
		path = os.path.abspath(os.path.expanduser(arg))
		
		if not os.path.isdir(path) and exists:
			raise FileNotFoundError("%s (%s) does not exist" %(arg, path))
		
		if writable and not os.access(path, os.W_OK | os.X_OK):
			raise PermissionError("%s exists but is not writable" %(arg))
		
		return path
	
	return cb

def integer(arg):
	"""
	Converts
	- "0x2a" ⇒ 42
	- "0o52" ⇒ 42
	- "42" ⇒ 42
	
	@while converting argument to int
	"""
	
	if type(arg) == int:
		return arg
	
	if len(arg) > 2:
		if arg[1] == "x":
			return int(arg, 16)
		elif arg[1] == "o":
			return int(arg, 8)
	
	return int(arg)

def integers(*args):
	"""
	@while converting arguments to ints
	"""
	
	out = []
	
	for arg in args:
		out.append(integer(arg))
	
	return out