"""
script for telegram bot and its functions
"""
__author__ = "Florian Kellermann, Linus Eickhoff"
__date__ = "11.03.2022"
__version__ = "0.0.4" 
__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

from ast import keyword
import os

import telebot
import time
import sys
import logging
import json

import news.news_fetcher as news
import shares.share_fetcher as share_fetcher
import datetime as dt

from telebot import types
from dotenv import load_dotenv

from api_handling.api_handler import API_Handler


load_dotenv(dotenv_path='.env')

bot_version = "0.2.1" 
user_list = []

#create api handler
api_handler = API_Handler("https://gruppe1.testsites.info/api", str(os.getenv("BOT_EMAIL")), str(os.getenv("BOT_PASSWORD")))
print("Webserver Token: " + str(api_handler.token))

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):
    
        """ Initialize a new user
        :type self: User
        :param self: object of the class
    
        :type p_user_id: int
        :param p_user_id: telegram user id
    
        :type p_user_name: str
        :param p_user_name: first name of user
    
        :type p_chat_id: int
        :param p_chat_id: telegram chat id
    
        :raises:
    
        :rtype:
        """    
        
        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):
    
    """ Description
    :type message: message object bot
    :param message: message that was reacted to, in this case always containing '/start'

    :raises: none

    :rtype: none
    """
    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):
    
    """ Sending programm version
    :type message: message object bot
    :param message: message that was reacted to, in this case always containing '/version'

    :raises: none

    :rtype:none
    """
    bot.reply_to(message, bot_version)


@bot.message_handler(commands=['help']) # /help -> sending all functions 
def send_welcome(message):
    
    """ Send all functions
    :type message: message object bot
    :param message: message that was reacted to, in this case always containing '/help'

    :raises: none

    :rtype: none
    """
    bot.reply_to(message, "/id or /auth get your user id\n/update get updates on your shares.\n/users see all users.\n/news get top article for each keyword.\n/allnews get all news (last 7 days)\n/keywords get all your keywords\n/addkeyword add a keyword\n/removekeyword remove a keyword\n/share get price of specific share\n\n_For further details see https://gruppe1.testsites.info _", parse_mode='MARKDOWN')


@bot.message_handler(commands=['users'])
def send_all_users(message):
    
    """ Send all users, only possible for admins
    :type message: message object bot
    :param message: message that was reacted to, in this case always containing '/users'

    :raises: none

    :rtype: none
    """
    print('Debug: users command')
    user_id = int(message.from_user.id) 
    
    # tbd check if user is admin
    
    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):
    
    """ Send user id for authentication with browser
    :type message: message object bot
    :param message: message that was reacted to, in this case always containing '/id' or '/auth'

    :raises: none

    :rtype: none
    """
    answer = 'Your ID/Authentication Code is: [' + str(message.from_user.id) + ']. Enter this code in the settings on https://gruppe1.testsites.info to get updates on your shares.'
    bot.reply_to(message, answer)


#function that sends telegram status(running or offline) as message from telegram bot to user
@bot.message_handler(commands=['status'])
def send_status(message):

    """ Sends status to user
    :type message: message object bot
    :param message: message that was reacted to, if no other command handler gets called

    :raises: none

    :rtype: none
    """
    bot.reply_to(message, "bot is running")


@bot.message_handler(commands=['update'])
def send_update(message):
    
    """ Send update on shares
    :type message: message object bot
    :param message: message that was reacted to, in this case always containing '/help'

    :raises: none

    :rtype: none
    """
    user_id = int(message.from_user.id)
    
    #Can be deleted when getting from database
    dirname = os.path.dirname(__file__)
    json_path = os.path.join(dirname, 'shares/shares_example.json')
    
    with open(json_path) as json_file:
            json_share_data = json.load(json_file)
            int_share_count = int(json_share_data['share_count'])
            str_username = str(json_share_data['user'])
            bot.send_message(chat_id=user_id, text=f'Hello {str_username}. Here is the update on your currently owned shares:')
            
            
    for i in range(int_share_count):
        
        my_share = json_share_data['shares'][i]
        my_share_symbol = str(my_share['symbol'])
        my_share_amount = float(my_share['amount_bought'])
        my_share_buy_price = float(my_share['price_bought'])
        my_share_course = float(share_fetcher.get_share_price(my_share_symbol))
        
        
        my_update_message = f'Symbol: {my_share_symbol}\nPrice: {my_share_course}\nBought for: {my_share_buy_price}\n\
        Amount owned: {my_share_amount}\nWin/Lose: {(my_share_amount*my_share_course) - (my_share_amount*my_share_buy_price)}'
        bot.send_message(chat_id=user_id, text=my_update_message)
    
    
@bot.message_handler(commands=['share'])
def send_share_update(message):
    
    """ Send price of a specific share
    :type message: message object bot
    :param message: message that was reacted to, in this case always containing '/share'

    :raises: none

    :rtype: none
    """
    user_id = int(message.from_user.id)
    
    #Get Information for user with this id
    bot.send_message(chat_id=user_id, text='Send symbol of share:')
    #str_share_price = shares.wait_for_share.main_loop(bot)
    bot.register_next_step_handler(message, send_share_price)
    
def send_share_price(message):
    str_share_price = share_fetcher.get_share_price(str(message.text))
    bot.reply_to(message, str_share_price)


@bot.message_handler(commands=['allnews'])
def send_all_news(message):
    
    """ Get news for keywords of user
    :type message: message object bot
    :param message: message that was reacted to, in this case always containing '/allnews'

    :raises: none

    :rtype: none
    """
    
    user_id = int(message.from_user.id)
    keywords = api_handler.get_user_keywords(user_id)

    if keywords == None:
        bot.send_message(chat_id=user_id, text='This didn\'t work. Make sure too connect your telegram id (/id) on https://gruppe1.testsites.info')
        return
    
    if not keywords:
        bot.send_message(chat_id=user_id, text='You have no keywords. Please add some keywords with /news')
        return

    keywords_search = ' OR '.join(keywords)
    print(keywords_search)
    now = dt.datetime.now().date()
    from_date = now - dt.timedelta(days=7)
    from_date_formatted = dt.datetime.strftime(from_date, '%Y-%m-%d')
    print(from_date_formatted)
    news_list = news.get_all_news_by_keyword(keywords_search, from_date_formatted)["articles"]

    if news_list:
        for article in news_list:
            formatted_article = news.format_article(article)
            bot.send_message(chat_id=user_id, text=formatted_article, parse_mode="MARKDOWN")
    else:
        bot.send_message(chat_id=user_id, text='No news found for your keywords.')
    

@bot.message_handler(commands=['news'])
def send_news(message):
    """ Get news for keywords of user

    :type message: message object bot
    :param message: message that was reacted to, in this case always containing '/news'

    :raises: none

    :rtype: none
    """
    user_id = int(message.from_user.id)
    keywords = api_handler.get_user_keywords(user_id)

    if keywords == None:
        bot.send_message(chat_id=user_id, text='This didn\'t work. Make sure too connect your telegram id (/id) on https://gruppe1.testsites.info')
        return
    
    if not keywords:
        bot.send_message(chat_id=user_id, text='You have no keywords. Please add some keywords with /addkeyword')
        return

    if keywords:
        for keyword in keywords:
            top_news = news.get_top_news_by_keyword(keyword)["articles"]
            if top_news == None:
                bot.send_message(chat_id=user_id, text='News Server did not respond correctly. Try again later.')
                return
            if not top_news:
                bot.send_message(chat_id=user_id, text=f'No news found for keyword: *{keyword}*', parse_mode="MARKDOWN")
                return

            formatted_article = news.format_article(top_news[0])
            bot.send_message(chat_id=user_id, text=f"_keyword: {keyword}_\n\n" + formatted_article, parse_mode="MARKDOWN")


@bot.message_handler(commands=['addkeyword'])
def add_keyword(message):
    """ Add keyword to user
    :type message: message object bot
    :param message: message that was reacted to, in this case always '/addkeyword'

    :raises: none

    :rtype: none
    """
    user_id = int(message.from_user.id)
    bot.send_message(chat_id=user_id, text='Type keyword to add:')
    bot.register_next_step_handler(message, store_keyword)
    
def store_keyword(message):
    user_id = int(message.from_user.id)
    print(str(user_id))
    keyword = str(message.text).lower()
    status = api_handler.set_keyword(user_id, keyword)
    if status == 200:
        bot.send_message(chat_id=user_id, text=f'Keyword "{keyword}" added.')
    else:
        bot.send_message(chat_id=user_id, text=f'Keyword "{keyword}" could not be stored. (statuscode {status})')


@bot.message_handler(commands=['removekeyword'])
def remove_keyword(message):
    """ Remove keyword from user
    :type message: message object bot
    :param message: message that was reacted to, in this case always '/removekeyword'

    :raises: none

    :rtype: none
    """
    user_id = int(message.from_user.id)
    bot.send_message(chat_id=user_id, text='Type keyword to remove:')
    bot.register_next_step_handler(message, remove_keyword_step)

def remove_keyword_step(message):
    user_id = int(message.from_user.id)
    keyword = str(message.text).lower()
    status = api_handler.delete_keyword(user_id, keyword)
    if status == 200:
        bot.send_message(chat_id=user_id, text=f'Keyword "{keyword}" removed.')
    else:
        bot.send_message(chat_id=user_id, text=f'Failed deleting keyword "{keyword}". (statuscode {status})')


@bot.message_handler(commands=['keywords'])
def send_keywords(message):
    """ Send keywords of user
    :type message: message object bot
    :param message: message that was reacted to, in this case always '/keywords'

    :raises: none

    :rtype: none
    """
    user_id = int(message.from_user.id)
    keywords = api_handler.get_user_keywords(user_id)
    if keywords == None:
        bot.send_message(chat_id=user_id, text='This didn\'t work. Make sure too connect your telegram id (/id) on https://gruppe1.testsites.info')
        return
    if not keywords:
        bot.send_message(chat_id=user_id, text='No keywords set for this account. Add keywords by using /addkeyword')
        return
    else:
        keywords_str = ', '.join(keywords)
        bot.send_message(chat_id=user_id, text=f'Your keywords are: _{keywords_str}_', parse_mode="MARKDOWN")


@bot.message_handler(func=lambda message: True) # Returning that command is unknown for any other statement
def echo_all(message):
    
    """ Tell that command is not known if it is no known command
    :type message: message object bot
    :param message: message that was reacted to, if no other command handler gets called

    :raises: none

    :rtype: none
    """
    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):
    
    """ Output in the console about current user actions and status of bot
    :type inline_query: 
    :param inline_query:

    :raises: none

    :rtype: none
    """
    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():
    
    """ Start bot
    :raises: none

    :rtype: none
    """
    bot.infinity_polling()

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