import json

import os.path

from time import time

import random

from functools import wraps

from flask import request, current_app

import tweepy

default_json_file = os.path.abspath('default.json')

last_state_file = os.path.abspath('laststate.json')

if not os.path.exists(default_json_file):

    raise RuntimeError('default.json does not exists!')

elif not os.path.isfile(default_json_file):

    raise RuntimeError('default.json is not a file!')

possible_open_tweets = (

    'The space is now open!',

    'The space is open! Come in and hack something!',

    'Yes, we\'re open! Come in and create something!',

    'Come by and hack something! We\'ve just opened!',

    'The ChaosStuff is now open for everyone!',

)

possible_closed_tweets = (

    'The space is now closed!',

    'We\'re closed now! See you soon.',

    'Sorry, we are closed now!',

)

    if 'TWITTER_CONSUMER_KEY' in current_app.config:

        auth = tweepy.OAuthHandler(

            current_app.config['TWITTER_CONSUMER_KEY'],

            current_app.config['TWITTER_CONSUMER_SECRET']

        )

        auth.set_access_token(

            current_app.config['TWITTER_ACCESS_TOKEN_KEY'],

            current_app.config['TWITTER_ACCESS_TOKEN_SECRET']

        )

        api = tweepy.API(auth)

class Singleton:

    def __new__(cls, *args, **kwargs):

        key = str(hash(cls))

        if not hasattr(cls, '_instance_dict'):

            cls._instance_dict = {}

        if key not in cls._instance_dict:

            cls._instance_dict[key] = super().__new__(cls, *args, **kwargs)

        return cls._instance_dict[key]

class ActiveStatus(Singleton, dict):

    def reload(self):

        with open(default_json_file, encoding='utf-8') as f:

            self.update(json.load(f))

        if os.path.exists(last_state_file) and os.path.isfile(last_state_file):

            with open(last_state_file, encoding='utf-8') as f:

                last_state_json = json.load(f)

            self['state'] = last_state_json['state']

            self['sensors'].update(last_state_json['sensors'])

    def save_last_state(self):

        with open(last_state_file, mode='w', encoding='utf-8') as f:

            last_state = {}

            last_state['state'] = self['state']

            last_state['sensors'] = self['sensors']

            json.dump(last_state, f, sort_keys=True)

    def add_user_present(self, username):

        if self['state']['open']:

            if 'people_now_present' not in self['sensors']:

                self['sensors']['people_now_present'] = [{'value': 0}]

            people_now_present = self['sensors']['people_now_present'][0]

            if 'names' in people_now_present and username not in people_now_present['names']:

                people_now_present['value'] += 1

                if username in current_app.config['PEOPLE_NOW_PRESENT_ALLOWED']:

                    people_now_present['names'].append(username)

            elif 'names' not in people_now_present:

                people_now_present['value'] += 1

                if username in current_app.config['PEOPLE_NOW_PRESENT_ALLOWED']:

                    people_now_present['names'] = [username]

            self['sensors']['people_now_present'][0] = people_now_present

        else:

            pass

    def remove_user_present(self, username):

        if self['state']['open'] and 'people_now_present' in self['sensors']:

            people_now_present = self['sensors']['people_now_present'][0]

            if people_now_present['value'] > 0:

                people_now_present['value'] -= 1

            if 'names' in people_now_present:

                if username in people_now_present['names']:

                    people_now_present['names'].remove(username)

                if not people_now_present['names'] or people_now_present['value'] == 0:

                    del people_now_present['names']

            self['sensors']['people_now_present'][0] = people_now_present

        else:

            pass

    def clear_user_present(self):

        self['sensors']['people_now_presents'][0]['value'] = 0

        if 'names' in self['sensors']['people_now_present'][0]:

            del self['sensors']['people_now_present'][0]['names']

    def send_tweet(self, value):

        tweet = random.choice(possible_open_tweets) if value else random.choice(possible_closed_tweets)

        try:

        except Exception as e:

            current_app.logger.error('Sending tweet failed! %s' % e,

                                     exc_info=True)

    def set_new_state(self, value=None, trigger_person=None, message=None):

        if value is not None and value != self['state']['open']:

            self['state']['open'] = value

            self.send_tweet(value)

            if not value:

                if 'people_now_present' in self['sensors']:

                    self.clear_user_present()

                if 'message' in self['state']:

                    del self['state']['message']

            if trigger_person is None:

                del self['state']['trigger_person']

            else:

                self['state']['trigger_person'] = trigger_person

            self['state']['lastchange'] = int(time())

        if message is not None:

            self['state']['message'] = message

def request_wants_json():

    best = request.accept_mimetypes.best_match(

        ['application/json', 'text/html']

    )

    return best == 'application/json' and \

        request.accept_mimetypes[best] > \

        request.accept_mimetypes['text/html']

def fuzzy_list_find(lst, key, value):

    for i, dic in enumerate(lst):

        if dic[key] == value:

            return i

    raise ValueError

def first(iterable, keys):

    for key in keys:

        if key in iterable:

            return key

    raise ValueError

def pass_active_status(f):

    @wraps(f)

    def wrapper(*args, **kwargs):

        status = ActiveStatus()

        rv = f(status, *args, **kwargs)

        status.save_last_state()

        return rv

    return wrapper