"""
技术指标因子模块
包含基于股票截面的技术指标因子实现
"""

import numpy as np
import polars as pl
import talib
from main.factor.operator_framework import DateWiseFactor, StockWiseFactor


class SMAFactor(StockWiseFactor):
    """简单移动平均线因子"""
    
    def __init__(self, window: int):
        super().__init__(
            name="SMA",
            parameters={"window": window},          # ← 只放数值参数
            required_factor_ids=["close"]           # ← 依赖原始列
        )

    def calc_factor(self, group_df: pl.DataFrame) -> pl.Series:
        window = self.parameters["window"]          # ← 直接从 self.parameters 取
        return group_df["close"].rolling_mean(window_size=window).alias(self.factor_id)


class EMAFactor(StockWiseFactor):
    """指数移动平均线因子"""
    
    def __init__(self, window: int):
        super().__init__(
            name="EMA",
            parameters={"window": window},
            required_factor_ids=["close"]
        )

    def calc_factor(self, group_df: pl.DataFrame) -> pl.Series:
        window = self.parameters["window"]
        return group_df["close"].ewm_mean(span=window).alias(self.factor_id)


class ATRFactor(StockWiseFactor):
    """平均真实波幅因子"""
    
    def __init__(self, window: int):
        super().__init__(
            name="ATR",
            parameters={"window": window},
            required_factor_ids=["high", "low", "close"]
        )

    def calc_factor(self, group_df: pl.DataFrame) -> pl.Series:
        window = self.parameters["window"]
        # 使用talib计算ATR
        close_array = group_df["close"].to_numpy()
        high_array = group_df["high"].to_numpy()
        low_array = group_df["low"].to_numpy()
        
        atr_values = talib.ATR(high_array, low_array, close_array, timeperiod=window)
        return pl.Series(atr_values).alias(self.factor_id)


class OBVFactor(StockWiseFactor):
    """能量潮指标因子"""
    
    def __init__(self):
        super().__init__(
            name="OBV",
            parameters={},
            required_factor_ids=["close", "vol"]
        )

    def calc_factor(self, group_df: pl.DataFrame) -> pl.Series:
        # 使用talib计算OBV
        close_array = group_df["close"].to_numpy()
        vol_array = group_df["vol"].to_numpy()
        
        obv_values = talib.OBV(close_array, vol_array)
        return pl.Series(obv_values).alias(self.factor_id)


class MACDFactor(StockWiseFactor):
    """MACD指标因子"""
    
    def __init__(self, fast_period: int = 12, slow_period: int = 26, signal_period: int = 9):
        super().__init__(
            name="MACD",
            parameters={"fast_period": fast_period, "slow_period": slow_period, "signal_period": signal_period},
            required_factor_ids=["close"]
        )

    def calc_factor(self, group_df: pl.DataFrame) -> pl.Series:
        fast_period = self.parameters["fast_period"]
        slow_period = self.parameters["slow_period"]
        signal_period = self.parameters["signal_period"]
        
        # 使用talib计算MACD
        close_array = group_df["close"].to_numpy()
        
        macd, macd_signal, macd_hist = talib.MACD(close_array, 
                                                 fastperiod=fast_period, 
                                                 slowperiod=slow_period, 
                                                 signalperiod=signal_period)
        
        # 返回MACD线值
        return pl.Series(macd).alias(self.factor_id)


class RSI_Factor(StockWiseFactor):
    """RSI相对强弱指数因子"""
    
    def __init__(self, window: int = 14):
        super().__init__(
            name="RSI",
            parameters={"window": window},
            required_factor_ids=["close"]
        )

    def calc_factor(self, group_df: pl.DataFrame) -> pl.Series:
        window = self.parameters["window"]
        # 使用talib计算RSI
        close_array = group_df["close"].to_numpy()
        
        rsi_values = talib.RSI(close_array, timeperiod=window)
        return pl.Series(rsi_values).alias(self.factor_id)



class CrossSectionalRankFactor(DateWiseFactor):
    def __init__(self, column: str, name: str = None, ascending: bool = True):
        self.target_column = column
        self.ascending = ascending
        factor_name = name or f"{column}_rank"
        super().__init__(
            name=factor_name,
            parameters={"column": column, "ascending": ascending},
            required_factor_ids=[column]
        )

    def calc_factor(self, group_df: pl.DataFrame) -> pl.Series:
        values = group_df[self.target_column]
        rank_pct = values.rank(method="average", descending=not self.ascending) / len(values)
        normalized = (rank_pct - 0.5) * 3.46
        return normalized.alias(self.factor_id)