#!/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, *substitutions):
    """
    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.'
    """
    if text:
        acc = []
        for s in text.split("{{"):
            selections, *rest = s.split("}}")
            choice = random.choice(re.split(r"\s*\^\s*", selections))
            acc = acc + [choice] + rest

        proposal = squish(''.join(acc).format(*substitutions))

        # If a choice is at the end of a sentence, and we could have
        # "no choice", as in:
        #     "He searches {{thoroughly ^ quickly ^}}."
        # We don't want a version that looks like:
        #     "He searches # ."
        # with a space before the punctuation:

        return re.sub(r"\s+([!?.,])", "\\1", proposal)


def choices(text, *substitutions):
    """
    Returns a section of 'text' based on separating semicolons.

    Note that text can already be separated as a list or tuple.
    """
    if isinstance(text, str):
        selections = re.split(r"\s*;;\s*", text)
    elif isinstance(text, (tuple, list)):
        selections = text

    if selections:
        return routput(random.choice(selections), *substitutions)


def split_party_msg(viewer, msg):
    # First a message for the view:
    viewer.msg(
        re.sub("<You>", "You", re.sub("<you>", "you", msg))
    )
    # Then the message for the rest of the area:
    viewer.location.msg_contents(re.sub("<[Yy]ou>",
                                        viewer.name.title(), msg),
                                 exclude=viewer)

# 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()