#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import sys
from configparser import ConfigParser
from datetime import datetime

import tweepy
from requests import get

config = ConfigParser()
try:
    config.read_file(open('config.ini'))
except FileNotFoundError:
    print('config.ini not found.')
    sys.exit(1)

# API path
try:
    api_path = config['DEFAULT']['api_path']
    consumer_key = config['DEFAULT']['consumer_key']
    consumer_secret = config['DEFAULT']['consumer_secret']
    access_token = config['DEFAULT']['access_token']
    access_token_secret = config['DEFAULT']['access_token_secret']
except KeyError as exception:
    print('Please check your config.ini.')
    sys.exit(1)
if not (api_path, consumer_key, consumer_key, consumer_secret, access_token, access_token_secret):
    print('2 Please check your config.ini.')
    sys.exit(1)


def comma_value(num):
    """Helper function for thousand separators"""
    return "{:,}".format(int(num)).replace(',', '.')


def get_api():
    auth = tweepy.OAuthHandler(consumer_key, consumer_secret)
    auth.set_access_token(access_token, access_token_secret)
    return tweepy.API(auth)


def get_pihole_data():
    try:
        res = get(api_path)
    except Exception as exception:
        print('Could not contact API: ' + str(exception))
        return

    if res.status_code != 200:
        print('Could not get data from Pi-Hole API.')
        return

    try:
        data = res.json()
    except:
        print('Got no or invalid JSON.')
        return
    if not all(k in data for k in
               ('ads_blocked_today', 'ads_percentage_today', 'dns_queries_today', 'domains_being_blocked')):
        print('This is not Pi-Hole JSON...')
        return

    return data


def construct_tweet(data):
    today = datetime.today().strftime("%d.%m.%Y")
    tweet = 'Pi-Hole-Statistik für den {date}:\n'.format(date=today)
    tweet += 'Blockierte Werbung: ' + str(comma_value(data['ads_blocked_today']))
    tweet += ' (' + str(round(data['ads_percentage_today'], 2)).replace('.', ',') + ' %)\n'
    tweet += 'DNS-Abfragen: ' + str(comma_value(data['dns_queries_today'])) + '\n'
    tweet += 'Domains auf der Blacklist: ' + str(comma_value(data['domains_being_blocked']))
    return tweet


def main():
    # Twitter login
    api = get_api()
    try:
        print('Logged in as @' + api.me().screen_name)
    except tweepy.error.TweepError:
        print('Error while logging in - check your credentials.')
        return

    # Get Pi-Hole info from API
    data = get_pihole_data()
    if not data:
        return

    # Tweet it!
    tweet = construct_tweet(data)
    try:
        status = api.update_status(status=tweet)
    except tweepy.error.TweepError:
        print('Status could not be posted.')
        return
    print('Status posted! https://twitter.com/' + status.author.screen_name + '/status/' + status.id_str)


if __name__ == '__main__':
    main()