#!/usr/bin/env python

import sys

from the_semantic_db_code import *
from the_semantic_db_functions import *
from the_semantic_db_processor import *

C = context_list("play with words")

# the idea:
# |x> => "x"
# |x> + |y> => "x and y"
# |x> + |y> + |z> => "x, y and z"
# |x> + |y> + |z> + |p> => "x, y, z and p"

one = ket("x")
two = ket("x") + ket("y")
three = ket("x") + ket("y") + ket("z")
four = ket("x") + ket("y") + ket("z") + ket("p")


def first_sp_to_words(one):
  one = superposition() + one  # convert one to sp if ket. There is probably a better way to do this!
  labels = [x.label for x in one.data]
  if len(labels) == 0:
    return ket("",0)           # maybe something else instead of this?
  if len(labels) == 1:
    result = labels[0]
  else:
    head = ", ".join(labels[:-1])
    tail = labels[-1]
    result = head + " and " + tail
  return ket("text: " + result)


print("one:      ",one)
print("words one:",sp_to_words(one))
print()
print("two:      ",two)
print("words two:",sp_to_words(two))
print()
print("three:      ",three)
print("words three:",sp_to_words(three))
print()
print("four:      ",four)
print("words four:",sp_to_words(four))