#!/usr/bin/python3
TOKEN=''


from telegram import Update, Chat, ChatMember, ParseMode, ChatMemberUpdated, BotCommand
from telegram.ext import Updater, CommandHandler, ChatMemberHandler, CallbackContext, MessageHandler, Filters
import telegram
import logging
import os.path
import yaml

configFilename='config.yml'

config = {}


reply_markup = None
bot = telegram.Bot(token=TOKEN)
updater = Updater(token=TOKEN, use_context=True)
dispatcher = updater.dispatcher

logging.basicConfig(format='%(asctime)s - %(name)s - %(levelname)s - %(message)s', level=logging.INFO)

def loadConfig():
  if(os.path.isfile(configFilename)):
    global config
    config.clear()
    with open(configFilename, 'r') as filehandle:
      try:
        config = yaml.safe_load(filehandle)
      except yaml.YAMLError as e:
        logging.error(e)

def saveConfig():
  with open(configFilename, 'w', encoding='utf8') as filehandle:
    yaml.dump(config, filehandle, default_flow_style=False, allow_unicode=True)

def setup(update: Update, context: CallbackContext):
  global config
  user = update.effective_user
  config['adminID'] = user.id
  config['name'] = user.first_name
  saveConfig()
  loadConfig()
  logging.info("Bot claimed by " + config['name'] + ".")
  context.bot.sendMessage(chat_id=update.effective_chat.id, text='You just claimed this bot, ' + config['name'] + '.')

def setName(update: Update, context: CallbackContext):
  if(context.args):
    global config
    config['name'] = " ".join(context.args)
    saveConfig()
    loadConfig()
    logging.info('Name changed to ' + config['name'])
    context.bot.sendMessage(chat_id=update.effective_chat.id, text='Your name is now ' + config['name'] + '.')
  else:
    context.bot.sendMessage(chat_id=update.effective_chat.id, text='You need at least one argument. Example: /setname Your Name')


def listBlacklist(update: Update, context: CallbackContext):
  if(isAdmin):
    global config
    if('blacklist' in config):
      bot.sendMessage(chat_id=config['adminID'], text="Currently blocked: \n" + "\n".join(config['blacklist']))
    else:
      bot.sendMessage(chat_id=config['adminID'], text="Currently blocked: \nNothing at all.")


def isInBlacklist(userid):
  if('blacklist' in config):
    if(str(userid) in config['blacklist']):
      logging.info("Blocked " + str(userid))
      return True
    else:
      logging.info("OK " + str(userid))
      return False

def isAdmin(userid):
  global config
  if(userid == config['adminID']):
    return True
  else:
    return False

def block(update: Update, context: CallbackContext):
  if(isAdmin):
    if(context.args):
      global config
      if('blacklist' not in config):
        config['blacklist'] = []
      config['blacklist'].append(context.args[0])
      saveConfig()
      loadConfig()
      logging.info("Blocked: " + context.args[0])
      bot.sendMessage(chat_id=config['adminID'], text="Blocked: " + context.args[0])

def unblock(update: Update, context: CallbackContext):
  if(isAdmin):
    if(context.args):
      global config
      if('blacklist' in config):
        if(context.args[0] in config['blacklist']):
          config['blacklist'].remove(context.args[0])
          saveConfig()
          loadConfig()
          logging.info("Unblocked: " + context.args[0])
          bot.sendMessage(chat_id=config['adminID'], text="Unblocked: " + context.args[0])


def start(update: Update, context: CallbackContext):
  reply_markup=telegram.ReplyKeyboardRemove()
  if('name' in config):
    context.bot.sendMessage(chat_id=update.effective_chat.id, text="Hello! " + config['name'] + " has set up a contact protection bot. To request contact, type /request.", reply_markup=reply_markup)
  else:
    context.bot.sendMessage(chat_id=update.effective_chat.id, text="Hello! This bot isn't claimed yet. Type /setup to claim.", reply_markup=reply_markup)


def forwardContact(update: Update, context: CallbackContext):
  user = update.effective_user
  if(isInBlacklist(user.id)):
    return

  mesg = "\nID: " + str(user.id)
  mesg +="\nUN: @" + str(user.username)
  mesg +="\nFN: " + str(user.first_name)
  mesg +="\nLN: " + str(user.last_name)
  bot.sendMessage(chat_id=config['adminID'], text="Request by: " + mesg)
  bot.send_contact(chat_id=config['adminID'], contact=update.message.contact)
  reply_markup=telegram.ReplyKeyboardRemove()
  context.bot.sendMessage(chat_id=update.effective_chat.id, text="Your contact information has been forwarded. " + config['name'] + " will eventually contact you back.", reply_markup=reply_markup)

def request(update: Update, context: CallbackContext):
  user = update.effective_user
  if(isInBlacklist(user.id)):
    return False

  logging.info("ID: " + str(user.id))
  logging.info("UN: " + str(user.username))
  logging.info("FN: " + str(user.first_name))
  logging.info("LN: " + str(user.last_name))


  if(user.username is None):
    context.bot.send_message(chat_id=update.effective_chat.id, text="You don't have a public username set up in Telegram. This will make it hard to contact you back."
      + " Please set up a username or share your phone number.")
    reply_markup = telegram.ReplyKeyboardMarkup([[telegram.KeyboardButton('Share phone number', request_contact=True)]])
    context.bot.sendMessage(chat_id=update.effective_chat.id, text='Share phone number?', reply_markup=reply_markup)

  else:
    mesg = "\nID: " + str(user.id)
    mesg +="\nUN: @" + str(user.username)
    mesg +="\nFN: " + str(user.first_name)
    mesg +="\nLN: " + str(user.last_name)

    bot.sendMessage(chat_id=config['adminID'], text="Request by: " + mesg)
    context.bot.send_message(chat_id=update.effective_chat.id, text="Your request has been sent. " + config['name'] + " will eventually contact you back.")

loadConfig()

commandsList = []
commandsList.append(BotCommand(command='start', description='Information about this bot.'))
if('name' in config):
  commandsList.append(BotCommand(command='request', description='Request ' + config['name'] + ' for contact'))


if('adminID' not in config):
  dispatcher.add_handler(CommandHandler('setup', setup))
  commandsList.append(BotCommand(command='setup', description='Set yourself up as owner.'))

bot.set_my_commands(commands=commandsList) 

dispatcher.add_handler(CommandHandler('start', start))
dispatcher.add_handler(CommandHandler('block', block))
dispatcher.add_handler(CommandHandler('blocklist', listBlacklist))
dispatcher.add_handler(CommandHandler('unblock', unblock))
dispatcher.add_handler(CommandHandler('setname', setName))
dispatcher.add_handler(CommandHandler('request', request))
dispatcher.add_handler(MessageHandler(Filters.contact, forwardContact))

updater.start_polling()