from typing import List

import aiohttp

from vkbottle import API, PhotoMessageUploader
from vkbottle.bot import Message
from vkbottle_types.codegen.objects import PhotosPhotoSizes
from vkbottle_types.objects import MessagesMessageAttachmentType

import ai_agent
import utils


class MyAPI(API):
    def __init__(self, bot_id: int, api_token: str):
        super().__init__(api_token)
        self.bot_id = bot_id


def get_bot_id(api: API) -> int:
    my_api: MyAPI = api
    return my_api.bot_id


async def get_user_name_for_ai(api: API, user_id: int):
    user = await api.users.get(user_ids=[user_id])
    if len(user) == 1:
        return "{} {}".format(user[0].first_name, user[0].last_name)
    else:
        return '@id' + str(user_id)


async def download_photo(photos: List[PhotosPhotoSizes]) -> bytes:
    max_photo_size = 16*1024*1024
    async with aiohttp.ClientSession() as session:
        for size_type in ['w', 'z', 'y', 'x', 'm', 's']:
            for photo in photos:
                if photo.type != size_type:
                    continue
                async with session.head(photo.url) as response:
                    if response.status != 200 or response.content_length > max_photo_size:
                        break
                async with session.get(photo.url) as response:
                    if response.status == 200:
                        return await response.read()
                break

    raise RuntimeError(f"Failed to download photo. Status code: {response.status}")


async def create_ai_message(message: Message) -> ai_agent.Message:
    ai_message = ai_agent.Message()
    ai_message.message_id = message.conversation_message_id
    ai_message.user_name = await get_user_name_for_ai(message.ctx_api, message.from_id)
    if len(message.text) > 0:
        ai_message.text = message.text
    for attachment in message.attachments:
        if attachment.type == MessagesMessageAttachmentType.PHOTO:
            ai_message.image = await download_photo(attachment.photo.sizes)
            break
        else:
            continue
    if ai_message.text is None and ai_message.image is None:
        raise utils.UnsupportedContentType()
    return ai_message


async def upload_photo(image: bytes, chat_id: int, api: API) -> str:
    return await PhotoMessageUploader(api).upload(file_source=image, peer_id=chat_id)