from abc import ABC, abstractmethod

from Account_Information import AccountInformation
from Orders import GenericLimitOrder, BuyOrder, SellOrder, OrderFilledResponse

from Historical_Data_Accessor import HistoricalDataAccessor

from typing import TYPE_CHECKING
if TYPE_CHECKING:
    from datetime import datetime
    
    from Common import TickData
    from Brokerage_Simulation import BrokerageSimulation



class StrategyTemplate(ABC):
    def __init__(self, symbol: str):
        self._symbol = symbol

        self._brokerage_simulation: 'BrokerageSimulation' = None

        self._status = 0
        self._historical_data_accessor: HistoricalDataAccessor = HistoricalDataAccessor()
        if self._historical_data_accessor.status != 0: # Something went wrong
            self._status = 1
            
        self._current_datetime: datetime = None

        self._account_information: AccountInformation = None
        
    def attach_account_information(self, account_information: 'AccountInformation') -> None:
        '''Link an AccountInformation() object to the Strategy.
        The Brokerage Simulation holds the true account information and makes the changes.'''
        self._account_information = account_information

    def attach_brokerage_simulation(self, brokerage_simulation: 'BrokerageSimulation') -> None:
        self._brokerage_simulation = brokerage_simulation
    
    def set_current_datetime(self, new_datetime: 'datetime') -> None:
        self._current_datetime = new_datetime

    @abstractmethod
    def react_to_market(self) -> list['GenericLimitOrder']:
        '''Main function that performs the analysis and creates orders based on market conditions.
        Using the _current_datetime, perform whatever past data analysis needed.
        Generate buy or sell orders based on the analysis as the strategy sees fit.
        Must be overridden'''
        
        # Make buy or sell orders

        # Submit orders with self._brokerage_simulation.submit_order()

        # Return the list of orders
        
        pass