#!/usr/bin/env python
# -*- coding: utf-8 -*-
# This program is dedicated to the public domain under the CC0 license.

"""
First, a few handler functions are defined. Then, those functions are passed to
the Dispatcher and registered at their respective places.
Then, the bot is started and runs until we press Ctrl-C on the command line.

Usage:
Basic inline bot example. Applies different text transformations.
Press Ctrl-C on the command line or send a signal to the process to stop the
bot.
"""
import logging
from uuid import uuid4

from telegram import InlineQueryResultArticle, ParseMode, \
    InputTextMessageContent
from telegram.ext import Updater, InlineQueryHandler, CommandHandler
from telegram.utils.helpers import escape_markdown

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

logger = logging.getLogger(__name__)


# Define a few command handlers. These usually take the two arguments bot and
# update. Error handlers also receive the raised TelegramError object in error.
def start(update, context):
    """Send a message when the command /start is issued."""
    update.message.reply_text('Hi!')


def help(update, context):
    """Send a message when the command /help is issued."""
    update.message.reply_text('Help!')


def inlinequery(update, context):
    """Handle the inline query."""
    query = update.inline_query.query
    results = [
        InlineQueryResultArticle(
            id=uuid4(),
            title="Caps",
            input_message_content=InputTextMessageContent(
                query.upper())),
        InlineQueryResultArticle(
            id=uuid4(),
            title="Bold",
            input_message_content=InputTextMessageContent(
                "*{}*".format(escape_markdown(query)),
                parse_mode=ParseMode.MARKDOWN)),
        InlineQueryResultArticle(
            id=uuid4(),
            title="Italic",
            input_message_content=InputTextMessageContent(
                "_{}_".format(escape_markdown(query)),
                parse_mode=ParseMode.MARKDOWN))]

    update.inline_query.answer(results)


def error(update, context):
    """Log Errors caused by Updates."""
    logger.warning('Update "%s" caused error "%s"', update, context.error)


def main():
    # Create the Updater and pass it your bot's token.
    # Make sure to set use_context=True to use the new context based callbacks
    # Post version 12 this will no longer be necessary
    updater = Updater("TOKEN", use_context=True)

    # Get the dispatcher to register handlers
    dp = updater.dispatcher

    # on different commands - answer in Telegram
    dp.add_handler(CommandHandler("start", start))
    dp.add_handler(CommandHandler("help", help))

    # on noncommand i.e message - echo the message on Telegram
    dp.add_handler(InlineQueryHandler(inlinequery))

    # log all errors
    dp.add_error_handler(error)

    # Start the Bot
    updater.start_polling()

    # Block until the user presses Ctrl-C or the process receives SIGINT,
    # SIGTERM or SIGABRT. This should be used most of the time, since
    # start_polling() is non-blocking and will stop the bot gracefully.
    updater.idle()


if __name__ == '__main__':
    main()