"""Utility helpers extracted from the original script."""


def shortname(name: str) -> str:
    return name.split(".")[0]


def dur(sec: int) -> str:
    sec = int(sec)
    h = int(sec / 3600)
    m = int((sec - h * 3600) / 60)
    s = int((sec - h * 3600) % 60)
    if h > 0:
        return "%d:%02d:%02d" % (h, m, s)
    if m > 0:
        return "%d:%02d" % (m, s)
    return "0:%02d" % s


def initlog(logfile: str):
    """Open logfile for appending; fall back to creating it or returning stderr.

    This mirrors the original behaviour from the monolithic script.
    """
    try:
        return open(logfile, "a+")
    except Exception:
        pass
    try:
        return open(logfile, "w")
    except Exception as e:
        import sys

        print(f"cannot open logfile {logfile}, using STDERR: {e}")
        return sys.stderr