// Destructive hub changes ask the operator first. The web asks in the page;
// the CLI asks in the terminal, or accepts --yes.

export interface ConfirmPrompt {
  readonly isTTY?: boolean;
  readonly ask?: (question: string) => Promise<string>;
}

const terminalQuestion = async (question: string): Promise<string> => {
  const { createInterface } = await import("node:readline/promises");
  const prompt = createInterface({ input: process.stdin, output: process.stdout });
  try {
    return await prompt.question(question);
  } finally {
    prompt.close();
  }
};

/**
 * Ask one yes/no question. --yes answers it. Without a terminal, this throws
 * instead of running the change.
 */
export const confirmed = async (
  question: string,
  yes: boolean,
  nonInteractiveError: string,
  prompt: ConfirmPrompt = {},
): Promise<boolean> => {
  if (yes) return true;
  const isTTY = prompt.isTTY ?? Boolean(process.stdin.isTTY && process.stdout.isTTY);
  if (!isTTY) throw new Error(nonInteractiveError);
  const answer = (await (prompt.ask ?? terminalQuestion)(`${question} [y/N] `))
    .trim()
    .toLowerCase();
  return answer === "y" || answer === "yes";
};