export const SECURE_TEXT_REDACTION = '<redacted secure text>'

type KeyboardSpecLike = {
  secureTextEntry?: boolean | null
  keyboardType?: string | null
} | null

type KeyboardStateLike = {
  layout?: { spec?: KeyboardSpecLike } | null
  spec?: KeyboardSpecLike
  focusedInput?: Record<string, unknown> | null
} | null

export function isSecureKeyboardState(state: KeyboardStateLike): boolean {
  const spec = state?.layout?.spec ?? state?.spec ?? null
  return !!spec?.secureTextEntry && spec.keyboardType !== 'visible-password'
}

export function redactTextForKeyboardState(
  text: string,
  state: KeyboardStateLike,
): string {
  return isSecureKeyboardState(state) ? SECURE_TEXT_REDACTION : text
}

export function redactKeyboardStateForOutput<T extends KeyboardStateLike>(state: T): T {
  if (!state || !isSecureKeyboardState(state)) return state
  const focusedInput = state.focusedInput
  if (!focusedInput || typeof focusedInput !== 'object') return state
  return {
    ...state,
    focusedInput: {
      ...focusedInput,
      secureTextEntry: true,
      text:
        typeof focusedInput.text === 'string' ? SECURE_TEXT_REDACTION : focusedInput.text,
    },
  }
}