"""
script for telegram bot and its functions
"""
__author__ = "Florian Kellermann, Linus Eickhoff"
__date__ = "11.03.2022"
__version__ = "0.0.3" 
__license__ = "None"

# side-dependencies: none
# Work in Progress
# Api-Key: 5228016873:AAGFrh0P6brag7oD3gxXjCh5gnLLE8JMvMs /debugAPI Key: 5108535940:AAF5FpPHNV96WxGCDt8aMrGGKke1VILYib4 (https://t.me/mynewdebugbot)
# text bot at t.me/projektaktienbot
# API Documentation https://core.telegram.org/bots/api
# Code examples https://github.com/eternnoir/pyTelegramBotAPI#getting-started

import os

import telebot
import time
import sys
import logging

import news_fetcher

from telebot import types
from dotenv import load_dotenv

load_dotenv()

bot_version = "0.1.1" 
user_list = []

class User: # Currently saving users in this class to test functionality -> later database
    def __init__(self, p_user_id, p_user_name, p_chat_id):
        self.user_id = int(p_user_id)
        self.chat_id = int(p_chat_id)
        self.user_name = str(p_user_name)

bot = telebot.TeleBot(os.getenv('BOT_API_KEY'))

@bot.message_handler(commands=['start']) # /start -> saving as new user and sending welcome
def send_start(message):
    new_user = User(int(message.from_user.id), message.from_user.first_name, int(message.chat.id))
    existing_already = False
    for known_user in user_list:
        if known_user.user_id == new_user.user_id:
            existing_already = True
    if existing_already == False:
        user_list.append(new_user)
        
    bot.reply_to(message, "Welcome to this share bot project. Type /help to get information on what this bot can do")


@bot.message_handler(commands=['version'])
def send_version(message):
    bot.reply_to(message, bot_version)


@bot.message_handler(commands=['help']) # /help -> sending all functions 
def send_welcome(message):
    bot.reply_to(message, "/id or /auth for authentication. /update to get updates on your shares. /users to see all users. For further details see aktienbot.flokaiser.com")


@bot.message_handler(commands=['users'])
def send_all_users(message):
    print('Debug: users command')
    user_id = int(message.from_user.id)
    answer = 'Current number of users: ' + str(len(user_list))
    bot.send_message(chat_id = user_id, text=answer)
    for known_user in user_list:
        answer = str(known_user.user_id) + ' : ' + known_user.user_name
        bot.send_message(chat_id=user_id, text=answer)
    
    
@bot.message_handler(commands=['id', 'auth']) # /auth or /id -> Authentication with user_id over web tool
def send_id(message):
    answer = 'Your ID/Authentication Code is: [' + str(message.from_user.id) + ']. Enter this code in the settings on aktienbot.flokaiser.com to get updates on your shares.'
    bot.reply_to(message, answer)


@bot.message_handler(commands=['update']) # /update -> send static update via user_id to this user, later fetch from database
def send_update(message):
    user_id = int(message.from_user.id)
    #Get Information for user with this id
    bot.send_message(chat_id=user_id, text='This is your update')


@bot.message_handler(commands=['news']) # /news -> send news by keyword
def send_news(message):
    keyword = "business"
    user_id = int(message.from_user.id)
    #Get Information for user with this id

    articles = news_fetcher.get_top_news_by_keyword(keyword) #tbd: get keyword from db
    try:
        formatted_article = news_fetcher.format_article(articles["articles"][0])
    except IndexError:
        bot.send_message(chat_id=user_id, text=f"no news currently available for keyword: {keyword}")
        return
    bot.send_message(chat_id=user_id, text=f"_keyword: {keyword}_\n\n" + formatted_article, parse_mode="MARKDOWN")


@bot.message_handler(func=lambda message: True) # Returning that command is unkown for any other statement
def echo_all(message):
    answer = 'Do not know this command or text: ' + message.text 
    bot.reply_to(message, answer)


telebot.logger.setLevel(logging.DEBUG)


@bot.inline_handler(lambda query: query.query == 'text') # inline prints for debugging
def query_text(inline_query):
    try:
        r = types.InlineQueryResultArticle('1', 'Result1', types.InputTextMessageContent('hi'))
        r2 = types.InlineQueryResultArticle('2', 'Result2', types.InputTextMessageContent('hi'))
        bot.answer_inline_query(inline_query.id, [r, r2])
    except Exception as e:
        print(e)


def main_loop():
    bot.infinity_polling()
    while 1:
        time.sleep(3)


if __name__ == '__main__':
    try:
        main_loop()
    except KeyboardInterrupt:
        print('\nExiting by user request.\n')
        sys.exit(0)