export function normalizeInternalRedirectPath(value: unknown, fallback = '/') {
  const raw = String(value ?? '').trim()
  if (!raw) return fallback

  if (!raw.startsWith('/') || raw.startsWith('//')) {
    return fallback
  }

  try {
    const parsed = new URL(raw, 'https://internal.local')
    return `${parsed.pathname}${parsed.search}${parsed.hash}`
  } catch {
    return fallback
  }
}

export function buildDingtalkAutoLoginPath(redirectPath: unknown) {
  const target = normalizeInternalRedirectPath(redirectPath)
  return `/login?dingtalk_redirect=true&redirect=${encodeURIComponent(target)}`
}

export function buildDingtalkEntryPath(redirectPath: unknown) {
  const target = normalizeInternalRedirectPath(redirectPath)
  return `/dingtalk-entry?redirect=${encodeURIComponent(target)}`
}