#!/usr/bin/env python
"""Plus joli"""

import pyparsing

txt = pyparsing.Word("".join(c for c in pyparsing.printables if c not in '=()|&'),exact=1)

ne = pyparsing.Literal('!=')
eq = pyparsing.Literal('=')
andop = pyparsing.oneOf('&')
orop = pyparsing.oneOf('|')
     
expr = pyparsing.operatorPrecedence( txt,
    [
     (ne, 2, pyparsing.opAssoc.RIGHT),
     (eq, 2, pyparsing.opAssoc.RIGHT),
     (andop, 2, pyparsing.opAssoc.LEFT),
     (orop, 2, pyparsing.opAssoc.LEFT),]
    )

def simplify(l):
	if not isinstance(l, list):
		return l
	if len(l) == 1: 
		return simplify(l[0])
	else:
		return [simplify(i) for i in l]

def toprefix(l):
	if not isinstance(l, list):
		return l
	op=l[1]
	args=[toprefix(i) for i in l if i!=op]
	return [op]+args
	
def toldapfilter(l):
	if not isinstance(l, list):
		return l
	op=l[0]
	if op == "=":
		return "%s=%s" % (l[1], l[2])
	elif op == "!=":
		return "!(%s=%s)" % (l[1], l[2])
	return op + ''.join(['(%s)' % toldapfilter(i) for i in l[1:]])
	
def human_to_list(data):
    if data:
        return toprefix(simplify(expr.parseString(data).asList()))

def human_to_ldap(data):
        return "(%s)" % toldapfilter(human_to_list(data))