from log import DEBUG


def ms_to_mmss(ms, decimals=0, negative=False):
    if not ms:
        return "-"
    sign = ""
    if ms < 0:
        if negative:
            sign = "-"
        else:
            ms = 0

    minutes, remainder = divmod(ms, 60 * 1000)
    seconds = remainder / 1000
    if int(seconds) == 60:
        DEBUG(f"ms_to_mmss({ms}) gave 60 seconds")

    return f"{sign}{minutes:.0f}:{seconds:02.{decimals}f}"