#!/usr/bin/env python
# pylint: disable=missing-function-docstring, unused-argument
# This program is dedicated to the public domain under the CC0 license.

"""
Basic example for a bot that uses inline keyboards. For an in-depth explanation, check out
 https://github.com/python-telegram-bot/python-telegram-bot/wiki/InlineKeyboard-Example.
"""
import logging

from telegram import InlineKeyboardButton, InlineKeyboardMarkup, Update
from telegram.ext import (
    CommandHandler,
    CallbackQueryHandler,
    Application,
    CallbackContext,
)


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


async def start(update: Update, context: CallbackContext.DEFAULT_TYPE) -> None:
    """Sends a message with three inline buttons attached."""
    keyboard = [
        [
            InlineKeyboardButton("Option 1", callback_data='1'),
            InlineKeyboardButton("Option 2", callback_data='2'),
        ],
        [InlineKeyboardButton("Option 3", callback_data='3')],
    ]

    reply_markup = InlineKeyboardMarkup(keyboard)

    await update.message.reply_text('Please choose:', reply_markup=reply_markup)


async def button(update: Update, context: CallbackContext.DEFAULT_TYPE) -> None:
    """Parses the CallbackQuery and updates the message text."""
    query = update.callback_query

    # CallbackQueries need to be answered, even if no notification to the user is needed
    # Some clients may have trouble otherwise. See https://core.telegram.org/bots/api#callbackquery
    await query.answer()

    await query.edit_message_text(text=f"Selected option: {query.data}")


async def help_command(update: Update, context: CallbackContext.DEFAULT_TYPE) -> None:
    """Displays info on how to use the bot."""
    await update.message.reply_text("Use /start to test this bot.")


def main() -> None:
    """Run the bot."""
    # Create the Application and pass it your bot's token.
    application = Application.builder().token("TOKEN").build()

    application.add_handler(CommandHandler('start', start))
    application.add_handler(CallbackQueryHandler(button))
    application.add_handler(CommandHandler('help', help_command))

    # Run the bot until the user presses Ctrl-C
    application.run_polling()


if __name__ == '__main__':
    main()