// Pure upload-progress formatting (no DOM), extracted from static/upload.js.

/** Human-readable transfer speed, e.g. "2.4 MB/s" or "740 KB/s". */
export function formatSpeed(bytesPerSec: number): string {
  return bytesPerSec > 1024 * 1024
    ? (bytesPerSec / (1024 * 1024)).toFixed(1) + ' MB/s'
    : (bytesPerSec / 1024).toFixed(0) + ' KB/s';
}

/**
 * Human-readable ETA, e.g. "45s" or "2m 5s".
 *
 * One rounding, applied once, before the split into minutes and seconds. The
 * previous spelling rounded twice, `ceil(sec / 60)` for the minutes and
 * `ceil(sec % 60)` for the remainder, so 125 seconds read as "3m 5s": the
 * minutes had already absorbed the remainder and then it was added again.
 * Rounding first also keeps the remainder under 60, which floor-then-ceil
 * would not: 119.5 seconds would have printed "1m 60s".
 */
export function formatEta(remainingSec: number): string {
  const whole = Math.ceil(remainingSec);
  return whole < 60 ? whole + 's' : Math.floor(whole / 60) + 'm ' + (whole % 60) + 's';
}