# point(h,v) or point(x=.., y=..)

__all__ = ['point', 'rect', 'size']

def all_defined(*args): return args.count(None)==0
def all_none(*args): return args.count(None)==len(args)
def is_listy(x): type(x) in (tuple, list)

# def point(a=None, b=None, *, x=None, y=None, h=None, v=None):
#   if all_defined(h,v): return (v, h)
#   if all_defined(x,y): return (y, x)
#   if type(a) in (tuple, list):
#     if len(a) == 2 and b is None: return tuple(a)
#     raise ValueError("bad parameter")
#   if all_defined(a,b): return (a, b)
#   raise ValueError("bad parameter")


# rect (v1, h1, v2, h2)
# rect( (0,0), (10,10) )
# rect (x=, y=, height=, width=)
# def rect(a=None, b=None, c=None, d=None, *,
# 	x=None,y=None,height=None,width=None,
# 	h1=None,h2=None,v1=None,v2=None):

#   if all_defined(x,y,height,width):
#   	return (y, x, y + height, x + width)
#   if all_defined(h1,h2,v1,v2):
#   	return (v1, h2, v2, h2)

#   if type(a) in (tuple,list):
#   	if len(a) == 4: return tuple(a)
#   	if type(b) in (tuple, list):
#   		if len(a) == 2 and len(b) == 2:
#   			return (*a, *b)
#   	raise ValueError("bad parameter")

#   if all_defined(a,b,c,d): return (a, b, c, d)
#   raise ValueError("bad parameter")



# struct Point {
#    short v;
#    short h;
#    };

# struct Rect {
#    short v1;
#    short h1;
#    short v2;
#    short h2;
#    };


def point(*args, x=None, y=None, h=None, v=None):

	if len(args) == 2: return args

	if len(args) == 1:
		a, = args
		if is_listy(a) and len(a) == 2:
			return a

	if not args:
		if all_defined(x,y): return (y, x)
		if all_defined(h,v): return (v, h)
	raise ValueError("bad point parameter")

def size(*args, height=None, width=None):

	if len(args) == 2: return args

	if len(args) == 1:
		a, = args
		if is_listy(a) and len(a) == 2:
			return a

	if not args:
		if all_defined(height,width): return (height, width)
	raise ValueError("bad size parameter")


def rect(*args,
	x=None,y=None,height=None,width=None,
	h1=None,h2=None,v1=None,v2=None):

	if len(args) == 4: return args

	if len(args) == 2:
		a, b = args
		if is_listy(a) and is_listy(b):
			if len(a) == 2 and len(b) == 2:
				return ( *a, *b )

	if len(args) == 1:
		a, = args
		if is_listy(a) and len(a) == 4: return a

	if not args:
		if all_defined(x,y,height,width):
			return (y, x, y + height, x + width)
		if all_defined(h1,h2,v1,v2):
			return (v1, h2, v2, h2)

	raise ValueError("bad rect parameter")