import asyncio
import json
import logging
from typing import Union

import jwt

import utils
from database import Marketplace
from limiter import BatchLimiter
from marketplaces.base import BaseMarketplaceApi


class WildberriesMarketplaceApi(BaseMarketplaceApi):
    def __init__(self, marketplace: Marketplace):
        self.marketplace = marketplace
        auth_data = json.loads(marketplace.auth_data)
        token = auth_data.get('token')
        self.is_valid = True
        try:
            decoded_token = jwt.decode(token, algorithms=["HS256"], options={"verify_signature": False})
        except Exception:
            logging.error(f"Couldn't decode token for {marketplace.id}")
            self.is_valid = False
            return
        self.limiter_key = str(marketplace.company_id) + str(decoded_token.get('sid'))

        self.headers = {
            'Authorization': token,
            'Content-Type': 'application/json'
        }

    def get_headers(self):
        return self.headers

    @property
    def api_url(self):
        return 'https://suppliers-api.wildberries.ru'

    async def update_stocks(self, data: Union[list, dict]):
        if type(data) is not list:
            return
        if not self.is_valid:
            logging.warning(f'Skipping marketplace [{self.marketplace.id}] because of invalid token')
            return
        max_stocks = 1000
        chunks = utils.chunk_list(data, max_stocks)
        if not chunks:
            return
        limiter = BatchLimiter()

        async def send_stock_chunk(chunk):
            try:
                await limiter.acquire_wildberries(self.limiter_key)
                request_data = {'stocks': chunk}
                response = await self._method('PUT', f'/api/v3/stocks/{self.marketplace.warehouse_id}',
                                              data=request_data)
                if response.status not in [204, 409]:
                    response = await response.json()
                    error_message = response.get('message')
                    error_code = response.get('code')
                    logging.warning(
                        f'Error occurred when sending stocks to [{self.marketplace.id}]: {error_message} ({error_code})')
                    return False
                return True
            except Exception as e:
                logging.error(
                    f'Exception occurred while sending stocks to marketplace ID [{self.marketplace.id}]: {str(e)}')
                return False
        tasks = [send_stock_chunk(chunk) for chunk in chunks]
        first_request = tasks[0]
        first_response = await first_request
        if not first_response:
            logging.error(f'Skipping marketplace [{self.marketplace.id}] because first request was unsuccessful')
            return

        await asyncio.gather(*tasks[1:])