import asyncio
from typing import Dict, List

import aiohttp

from token_bot.token_database.exceptions import *
from token_bot.token_database.flavor import Flavor
from token_bot.token_database.region import Region


class Database:
    def __init__(self, session: aiohttp.ClientSession):
        self.data_url = "https://data.wowtoken.app/v2/"
        self.session = session

    async def _get_data(self, endpoint: str) -> Dict | List:
        url = f"{self.data_url}{endpoint}"

        success = False
        tries = 0
        backoff = 0.1

        while not success and tries <= 5:
            if tries > 1:
                await asyncio.sleep(backoff * tries)
            try:
                return await self._external_call(url)
            except TokenHttpException:
                tries += 1
        raise TokenHttpException

    async def _external_call(self, url) -> Dict | List:
        async with self.session.get(url) as resp:
            await resp.text()
            if resp.ok:
                return await resp.json()
            else:
                raise TokenHttpException(resp.status)

    async def current(self, flavor: Flavor) -> dict:
        return await self._get_data(f"current/{flavor.name.lower()}.json")

    async def history(self, flavor: Flavor, region: Region, relative_time: str = "all"):
        return await self._get_data(
            f"relative/{flavor.name.lower()}/{region.value.lower()}/{relative_time}.json"
        )