export function formatBytes(bytes) {
  const size = Number(bytes) || 0;
  if (size < 1024) {
    return `${size} B`;
  }

  const units = ['KB', 'MB', 'GB', 'TB'];
  let value = size / 1024;
  let unitIndex = 0;

  while (value >= 1024 && unitIndex < units.length - 1) {
    value /= 1024;
    unitIndex += 1;
  }

  return `${value.toFixed(value < 10 ? 1 : 0)} ${units[unitIndex]}`;
}

export function formatTimestamp(timestamp) {
  const value = Number(timestamp);
  if (!Number.isFinite(value) || value <= 0) {
    return '-';
  }
  return new Date(value).toLocaleString('de-DE');
}

export function formatCountdown(timestamp) {
  const expiresAt = Number(timestamp) || 0;
  const deltaMinutes = Math.floor(Math.max(0, expiresAt - Date.now()) / 60_000);
  const hours = Math.floor(deltaMinutes / 60);
  const days = Math.floor(hours / 24);

  if (days > 0) {
    return `${days}d ${hours % 24}h`;
  }
  if (hours > 0) {
    return `${hours}h ${deltaMinutes % 60}m`;
  }
  return `${deltaMinutes}m`;
}

export function parseLogDetail(detailText) {
  if (!detailText) {
    return [];
  }

  try {
    const parsed = JSON.parse(detailText);
    if (!parsed || typeof parsed !== 'object' || Array.isArray(parsed)) {
      return [{ key: 'detail', value: String(detailText) }];
    }
    return Object.entries(parsed).map(([key, value]) => ({
      key,
      value: String(value),
    }));
  } catch {
    return [{ key: 'detail', value: String(detailText) }];
  }
}

export function readSearchParam(searchParams, key) {
  const rawValue = searchParams?.[key];
  if (Array.isArray(rawValue)) {
    return String(rawValue[0] || '');
  }
  if (typeof rawValue === 'string') {
    return rawValue;
  }
  return '';
}