py

import time


import pandas as pd


def pretty_time(sec: int) -> str:
    return time.strftime("%H:%M:%S", time.gmtime(sec))


def generate_time_intervals(
    series: pd.Series, rolling_window: int = 5, threshold: int = 2
) -> list[tuple[str, str]]:
    assert rolling_window >= threshold, "rolling_window must be greater than threshold"

    return (
        series.rolling(rolling_window)
        .sum()[lambda x: x >= threshold]
        .index.to_series()
        .pipe(
            lambda ser_: ser_.groupby(ser_.diff().ne(1).cumsum()).agg(["first", "last"])
        )
        .agg(["first", "last"])
        .loc[lambda df_: (df_["last"] - df_["first"]) >= rolling_window]
        .apply(
            {
                "first": lambda x: max(0, x - rolling_window + threshold),
                "last": lambda x: max(0, x - rolling_window),
            }
        )
        .applymap(pretty_time)
        .apply(tuple, 1)
        .tolist()
    )