from typing import Any, Callable, Dict, Optional

import hummingbot.connector.derivative.binance_perpetual.binance_perpetual_constants as CONSTANTS
from hummingbot.connector.time_synchronizer import TimeSynchronizer
from hummingbot.connector.utils import TimeSynchronizerRESTPreProcessor
from hummingbot.core.api_throttler.async_throttler import AsyncThrottler
from hummingbot.core.web_assistant.auth import AuthBase
from hummingbot.core.web_assistant.connections.data_types import RESTMethod, RESTRequest
from hummingbot.core.web_assistant.rest_pre_processors import RESTPreProcessorBase
from hummingbot.core.web_assistant.web_assistants_factory import WebAssistantsFactory


class BinancePerpetualRESTPreProcessor(RESTPreProcessorBase):

    async def pre_process(self, request: RESTRequest) -> RESTRequest:
        if request.headers is None:
            request.headers = {}
        request.headers["Content-Type"] = (
            "application/json" if request.method == RESTMethod.POST else "application/x-www-form-urlencoded"
        )
        return request


def rest_url(path_url: str, domain: str = "binance_perpetual", api_version: str = CONSTANTS.API_VERSION):
    base_url = CONSTANTS.PERPETUAL_BASE_URL if domain == "binance_perpetual" else CONSTANTS.TESTNET_BASE_URL
    return base_url + api_version + path_url


def wss_url(endpoint: str, domain: str = "binance_perpetual"):
    base_ws_url = CONSTANTS.PERPETUAL_WS_URL if domain == "binance_perpetual" else CONSTANTS.TESTNET_WS_URL
    return base_ws_url + endpoint


def build_api_factory(
        throttler: Optional[AsyncThrottler] = None,
        time_synchronizer: Optional[TimeSynchronizer] = None,
        domain: str = CONSTANTS.DOMAIN,
        time_provider: Optional[Callable] = None,
        auth: Optional[AuthBase] = None) -> WebAssistantsFactory:
    throttler = throttler or create_throttler()
    time_synchronizer = time_synchronizer or TimeSynchronizer()
    time_provider = time_provider or (lambda: get_current_server_time(
        throttler=throttler,
        domain=domain,
    ))
    api_factory = WebAssistantsFactory(
        throttler=throttler,
        auth=auth,
        rest_pre_processors=[
            TimeSynchronizerRESTPreProcessor(synchronizer=time_synchronizer, time_provider=time_provider),
            BinancePerpetualRESTPreProcessor(),
        ])
    return api_factory


def build_api_factory_without_time_synchronizer_pre_processor(throttler: AsyncThrottler) -> WebAssistantsFactory:
    api_factory = WebAssistantsFactory(
        throttler=throttler,
        rest_pre_processors=[BinancePerpetualRESTPreProcessor()])
    return api_factory


def create_throttler() -> AsyncThrottler:
    return AsyncThrottler(CONSTANTS.RATE_LIMITS)


async def get_current_server_time(
        throttler: Optional[AsyncThrottler] = None,
        domain: str = CONSTANTS.DOMAIN,
) -> float:
    throttler = throttler or create_throttler()
    api_factory = build_api_factory_without_time_synchronizer_pre_processor(throttler=throttler)
    rest_assistant = await api_factory.get_rest_assistant()
    response = await rest_assistant.execute_request(
        url=rest_url(path_url=CONSTANTS.SERVER_TIME_PATH_URL, domain=domain),
        method=RESTMethod.GET,
        throttler_limit_id=CONSTANTS.SERVER_TIME_PATH_URL,
    )
    server_time = response["serverTime"]

    return server_time


def is_exchange_information_valid(rule: Dict[str, Any]) -> bool:
    """
    Verifies if a trading pair is enabled to operate with based on its exchange information

    :param exchange_info: the exchange information for a trading pair

    :return: True if the trading pair is enabled, False otherwise
    """
    if rule["contractType"] == "PERPETUAL" and rule["status"] == "TRADING":
        valid = True
    else:
        valid = False
    return valid
