from dataclasses import dataclass
from typing import Generic, TypeVar, Optional

T = TypeVar('T')

@dataclass
class TickerData:
    symbol: str
    tickDirection: str
    price24hPcnt: str
    lastPrice: str
    prevPrice24h: str
    highPrice24h: str
    lowPrice24h: str
    prevPrice1h: str
    markPrice: str
    indexPrice: str
    openInterest: str
    openInterestValue: str
    turnover24h: str
    volume24h: str
    nextFundingTime: str
    fundingRate: str
    bid1Price: str
    bid1Size: str
    ask1Price: str
    ask1Size: str

@dataclass
class Message(Generic[T]):
    topic: str
    type: str
    data: Optional[T] = None
    cs: Optional[int] = None
    ts: Optional[int] = None

    @staticmethod
    def from_json(json_dict: dict) -> 'Message[T]':
        if json_dict['topic'].startswith("tickers"):
            data = TickerData(**json_dict['data'])
        else:
            data = None

        json_dict.pop('data', None)
        return Message(**json_dict, data=data)