from pandas import DataFrame, Series

from daily_data import get_daily_data

def signals(data: DataFrame) -> Series:
    """
    Generate long signals based on the VIX Above Moving Average strategy.

    Returns a Series with 'L' for long signals and 'N' for no signal.
    """
    ma_200 = data['Close'].rolling(window = 200).mean()
    above_200_ma = data['Close'] > ma_200

    start_date = data['Date'].min()
    end_date = data['Date'].max()
    vix_data = get_daily_data(symbol='VIX.XO', start_date = start_date, end_date = end_date)

    vix_ma_10 = vix_data['Close'].rolling(window = 10).mean()
    vix_close_10_percent_above_ma = vix_data['Close'] >= (1.1 * vix_ma_10)

    signals = Series('N', index = data.index)
    signals[above_200_ma & vix_close_10_percent_above_ma] = 'L'
    return signals