import warnings
import pandas as pd
from rich import print as rprint
from typing import Union


# 警告格式
def custom_warnings(message, category, filename, lineno, file=None, line=None):
    rprint("[bold red]Warning:[/bold red]", message)
warnings.showwarning = custom_warnings


class CustomWarning(UserWarning):
    pass
warnings.simplefilter('always', category=CustomWarning)


class Account():
    """
    账户类：用于控制账户类型
    
    Args:
        is_real (bool):                             是否为真实交易
        init_account (Union[int, float]):           初始账户金额
        trade_limit (float):                        是否限制每个股票的购买比例(只在真实账户中有效)
        position_ratio (Union[float, pd.Series]):   持仓比例
    """
    def __init__(self,
                 is_real: bool = False,
                 init_account: Union[int, float] = 1e6,
                 trade_limit: float = 0.01,
                 position_ratio: Union[float, pd.Series] = 1.) -> None:
        if is_real:
            self.a_type = 'amount'
            self.account = init_account
        else:
            self.a_type = 'percent'
            self.account = 1.0
        self.trade_limit = trade_limit
        # 持仓比例
        # 判断类型以及持仓比例范围为0-2之间
        if isinstance(position_ratio, (int, float)):
            position_ratio = float(position_ratio)
            if position_ratio >= 0 and position_ratio <= 2:
                self.position_ratio = position_ratio
            else:
                raise ValueError('`position_ratio` should less than 2.')
        elif isinstance(position_ratio, pd.Series):
            if position_ratio.min() >= 0 and position_ratio.max() <= 2:
                self.position_ratio = position_ratio
            else:
                raise ValueError('`position_ratio` should be position and less than 2.')
        else:
            raise ValueError('`position_ratio` should be float or Series.')
        # 当前持仓
        self.position = pd.DataFrame()
        # 账户收益更新
        self.account_history = pd.DataFrame(columns=['date','trade_time','turnover','position_ratio','pnl'])
        # 历史持仓
        self.position_history = dict()
        # 当前日期
        self.date = None
    
    # 获取收盘时持仓和仓位
    @property
    def close_position(self):
        return self.position[self.position['trade_time'] == 'close']['stock_code'].values
    
    @property
    def close_weight(self):
        return self.position[self.position['trade_time'] == 'close'].weight.values