"""
script for regularly sending updates on shares and news based on user interval
"""
__author__ = "Florian Kellermann, Linus Eickhoff"
__date__ = "26.04.2022"
__version__ = "1.0.2" 
__license__ = "None"

from dotenv import load_dotenv
import news.news_fetcher as news_fetcher
import time
import os
from bot import bot
import sys
from apscheduler.schedulers.background import BackgroundScheduler
from api_handling.api_handler import API_Handler


'''
* * * * * code
┬ ┬ ┬ ┬ ┬
│ │ │ │ │
│ │ │ │ └──── weekday (0->Monday, 7->Sunday)
│ │ │ └────── Month (1-12)
│ │ └──────── Day (1-31)
│ └────────── Hour (0-23)
└──────────── Minute (0-59)

example 0 8 * * * -> daily update at 8am
'''
user_ids = []
user_crontab = []

load_dotenv(dotenv_path='.env')

def start_updater():
    """ starting function for regularly sending updates
    :raises: none

    :rtype: none
    """
    
    print("Bot updates started")
    
    my_handler = API_Handler("https://gruppe1.testsites.info/api", str(os.getenv("BOT_EMAIL")), str(os.getenv("BOT_PASSWORD")))

    
    update_crontab(my_handler)
    
    
def update_crontab(p_my_handler):
    """ Updating crontab lists every hour
    :type pCurrent_Time: time when starting crontab update
    :param pCurrent_Time: datetime

    :raises: none

    :rtype: none
    """
    
    global user_crontab
    global user_ids
    
    all_users = p_my_handler.get_all_users()
    
    user_ids = []
    user_crontab = []
    
    for element in all_users:
        if element["cron"] != '' and element["telegram_user_id"] != '':
            try:
                user_ids.append(int(element["telegram_user_id"]))
                try:
                    user_crontab.append(str(element["cron"]))
                except: continue
            except: continue
                
    
    print(user_ids)
    
    update_based_on_crontab(user_ids, user_crontab, p_my_handler)
    
    update_crontab(p_my_handler)
    
    
def update_based_on_crontab(p_user_ids, p_user_crontab, p_my_handler):
    
    """ Check all the crontab codes and add jobs to start in time
    :type p_user_ids: array
    :param p_user_ids: user id array of all users

    :type p_user_crontab: array
    :param p_user_crontab: crontabs for all users equivalent to the user array

    :type p_my_handler: Api_Handler
    :param p_my_handler: get database stuff

    :raises: none

    :rtype: none
    """
    
    my_scheduler = BackgroundScheduler()
    
    for i in range(len(p_user_ids)):
        cron_split = p_user_crontab[i].split(" ")
        print(cron_split[4], cron_split[1], cron_split[0], cron_split[3], cron_split[2])
        my_scheduler.add_job(update_for_user, 'cron', day_of_week = cron_split[4] , hour= cron_split[1] , minute = cron_split[0], month= cron_split[3] , day=cron_split[2], args=(p_user_ids[i], p_my_handler ))
    
    my_scheduler.start()
    
    time.sleep( 600 )
    my_scheduler.shutdown()
                    
def update_for_user(p_user_id, p_my_handler):
    
    """ Pull shares and send updates for specific user id
    :type p_user_id: integer
    :param p_user_id: user id of user that shall receive update

    :type p_my_handler: Api_Handler
    :param p_my_handler: handle the api and pull from database

    :raises: none

    :rtype: none
    """
    share_symbols = []
    share_amounts = []
    share_courses = []
    
    my_portfolio = p_my_handler.get_user_portfolio(p_user_id)
    
    for element in my_portfolio:
        if element["count"] != '' and element["isin"]!= '':
            print(element["count"], element["isin"])
            share_symbols.append(element["isin"])
            share_amounts.append(element["count"])
            share_courses.append(element["current_price"])

    my_user = p_my_handler.get_user(p_user_id)
    send_to_user("Hello %s this is your share update for today:"%str(my_user["username"]), pUser_id=p_user_id)
    
    if len(share_symbols) != 0:
        for i in range(len(share_symbols)):
            my_update_message = f'Symbol: {share_symbols[i]}\nCurrent Price per Share: {share_courses[i]}\nAmount owned: {share_amounts[i]}\nTotal Investment: {float(share_courses[i]) * float(share_amounts[i])}'
            send_to_user(my_update_message, pUser_id=p_user_id)
    else:
        send_to_user("No shares found for your account. Check https://gruppe1.testsites.info to change your settings and add shares.", pUser_id=p_user_id)

    keywords = p_my_handler.get_user_keywords(p_user_id) # get keywords as array

    if(keywords): # if keywords exist and array is not empty
        send_to_user("If you haven't read yet: \nHere are some interesting news according to your keywords:", pUser_id=p_user_id)
        for keyword in keywords:
            news = news_fetcher.get_top_news_by_keyword(keyword)["articles"]

            if not news: # if empty news array
                send_to_user(f"No news found for keyword _{keyword}_.", pUser_id=p_user_id, md_mode=True)
            
            if news == None: # if news is none
                send_to_user(f"Server error for keyword _{keyword}_.", pUser_id=p_user_id, md_mode=True)
            else:
                news_formatted = news_fetcher.format_article(news[0]) # format for message, only use the most popular article
                send_to_user(f"_keyword: {keyword}_\n\n{news_formatted}", pUser_id=p_user_id, md_mode=True) # send news with related keyword in Markdown

         
    
def send_to_user(pText, pUser_id , md_mode = False):
    
    """ Send message to user
    :type pText: string
    :param pText: Text to send to user

    :type pUser_id: int
    :param pUser_id: user to send to. per default me (Florian Kellermann)

    :type md_mode: boolean
    :param md_mode: if true, parse_mode is markdown

    :raises: none

    :rtype: none
    """
    if md_mode:
        bot.send_message(chat_id=pUser_id, text=pText, parse_mode="MARKDOWN")
    else:
        bot.send_message(chat_id=pUser_id, text=pText)



if __name__ == "__main__":
    try:
        start_updater()
        sys.exit(-1)
    except KeyboardInterrupt:
        print("Ending")
        sys.exit(-1)