import asyncio
import random
from PIL import Image
from io import BytesIO

from telethon import TelegramClient
from telethon.tl.functions.messages import GetAllStickersRequest, GetStickerSetRequest
from telethon.tl.types import InputStickerSetID
from aiohttp import web

loop = asyncio.get_event_loop()

api_id = 0 # Put you api id here
api_hash = '' # Put your api hash here
client = TelegramClient('devenv', api_id, api_hash, loop=loop)


async def get_sticker():
    sticker_sets = await client(GetAllStickersRequest(0))
    sticker_set = random.choice(sticker_sets.sets)
    stickers = await client(
        GetStickerSetRequest(
            stickerset=InputStickerSetID(
                id=sticker_set.id,
                access_hash=sticker_set.access_hash
            )
        )
    )

    sticker = BytesIO()
    await client.download_media(random.choice(stickers.documents), file=sticker)

    return sticker


async def get_handler(request):
    sticker = Image.open(
        await get_sticker()
    ).convert('RGBA')

    png = BytesIO()
    sticker.save(png, 'png')
    png.seek(0)

    return web.Response(body=png.read(), content_type='image/png')


async def start_site(app, address='0.0.0.0', port=8080):
    runner = web.AppRunner(app)
    await runner.setup()
    site = web.TCPSite(runner, address, port)
    await site.start()
    return runner


async def main():
    await client.start()

    web_app = web.Application()
    web_app.add_routes(
        [
            web.get('/', get_handler)
        ]
    )

    runner = await start_site(web_app)

    try:
        while True:
            await asyncio.sleep(0.01)
    except KeyboardInterrupt:
        pass

    await runner.cleanup()

if __name__ == '__main__':
    try:
        loop.run_until_complete(main())
    except KeyboardInterrupt:
        pass
    loop.close()