#!/usr/bin/env python
# pylint: disable=missing-function-docstring, unused-argument
# 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, Update
from telegram.helpers import escape_markdown
from telegram.ext import Updater, InlineQueryHandler, CommandHandler, CallbackContext

# 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 update and
# context. Error handlers also receive the raised TelegramError object in error.
def start(update: Update, context: CallbackContext.DEFAULT_TYPE) -> None:
    """Send a message when the command /start is issued."""
    update.message.reply_text('Hi!')


def help_command(update: Update, context: CallbackContext.DEFAULT_TYPE) -> None:
    """Send a message when the command /help is issued."""
    update.message.reply_text('Help!')


def inlinequery(update: Update, context: CallbackContext.DEFAULT_TYPE) -> None:
    """Handle the inline query."""
    query = update.inline_query.query

    if query == "":
        return

    results = [
        InlineQueryResultArticle(
            id=str(uuid4()),
            title="Caps",
            input_message_content=InputTextMessageContent(query.upper()),
        ),
        InlineQueryResultArticle(
            id=str(uuid4()),
            title="Bold",
            input_message_content=InputTextMessageContent(
                f"*{escape_markdown(query)}*", parse_mode=ParseMode.MARKDOWN
            ),
        ),
        InlineQueryResultArticle(
            id=str(uuid4()),
            title="Italic",
            input_message_content=InputTextMessageContent(
                f"_{escape_markdown(query)}_", parse_mode=ParseMode.MARKDOWN
            ),
        ),
    ]

    update.inline_query.answer(results)


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

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

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

    # on non command i.e message - echo the message on Telegram
    dispatcher.add_handler(InlineQueryHandler(inlinequery))

    # 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()