import logging
from aiogram import Bot, Dispatcher
from aiogram.dispatcher.webhook import configure_app
from aiohttp.web import Application

from config import Config
from .routes import routes, TELEGRAM_WEBHOOK_ROUTE


def create_app(bot: Bot,
               dispatcher: Dispatcher,
               config: Config) -> Application:
    """
    Create aiohttp application.

    :param bot: telegram bot instance.
    :param dispatcher: telegram dispatcher instance.
    :param config: config object.
    :return: aiohttp Appliction.
    """

    telegram_webhook_url = f'{config.base_url}{TELEGRAM_WEBHOOK_ROUTE}'

    async def on_startup(_):
        await bot.set_webhook(telegram_webhook_url)

    async def on_shutdown(_):
        logging.warning('Shutting down')
        await bot.delete_webhook()
        await dispatcher.storage.close()
        await dispatcher.storage.wait_closed()
        session = await bot.get_session()
        await session.close()
        logging.warning('Bye!..')

    app = Application()
    app.add_routes(routes)
    app.on_startup.append(on_startup)
    app.on_shutdown.append(on_shutdown)
    configure_app(dispatcher, app, TELEGRAM_WEBHOOK_ROUTE)
    return app


__all__ = ('create_app',)