const extractStringRecord = (value: unknown): Record<string, unknown> | null => (
  value && typeof value === 'object' && !Array.isArray(value)
    ? value as Record<string, unknown>
    : null
)

export const readNestedString = (value: unknown, keys: string[]): string | null => {
  let current: unknown = value
  for (const key of keys) {
    const record = extractStringRecord(current)
    if (!record) return null
    current = record[key]
  }
  return typeof current === 'string' && current.trim() ? current.trim() : null
}

export const parseHostFromUrl = (value?: string | null): string | null => {
  if (!value?.trim()) return null
  try {
    return new URL(value).hostname
  } catch {
    return value.trim()
  }
}