#!/usr/bin/env python

import random
import re


def squish(text):
    "Remove series of spaces from the text."
    return re.sub('[ \n\t]+', ' ', text).strip()


def routput(text, substitution=None):
    """
    Return string with internal word choices replaced randomly.
    For instance, the string:

    'This feels [|very|quite] [nice|cozy|comfortable].'

    Could return any of the following strings:

    'This feels quite nice.'
    'This feels cozy.'
    'This feels very comfortable.'
    """
    acc = []
    for s in text.split("["):
        selections, *rest = s.split("]")
        choice = random.choice(selections.split('|'))
        acc = acc + [choice] + rest

    return squish(''.join(acc).format(substitution or ""))


def choices(text, substitution=None):
    """
    Returns a section of 'text' based on separating semicolons.
    """
    selections = text.split(';;')
    return routput(random.choice(selections), substitution)


def split_party(text, viewer):
    return text.sub(r"<you>", viewer.name)
# def searsonal(text, **kwargs):
#     season = kwargs['season'] or kwargs['location'].get_season()
#     time_of_day = kwargs['time_of_day'] or kwargs['location'].get_time_of_day()