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import { readKeypress, color, ansi } from '../deps.ts';import { print } from './utils/io.ts';
const defaultOpts = {};
interface Option<T> {  label: string;  value: T;}
export async function select<T>(_opts: {  message: string;  options: Option<T>[];  default?: T;}): Promise<T>;export async function select(_opts: {  message: string;  options: string[];  default?: string;}): Promise<string>;export async function select(_opts: {  message: string;  options: unknown[];  default?: unknown;}): Promise<unknown> {  if (_opts.options.length == 0) throw 'select requires non empty list of options';
  const opts = Object.assign({}, defaultOpts, _opts);  const { options } = opts;  // Normalize options  let optionList: Option<unknown>[];  if (typeof options[0] == 'string') {    optionList = (options as string[]).map(e => ({label: e, value: e}));  } else {    optionList = options as Option<unknown>[];  }
  const len = optionList.length;  let idx = 0;  if (opts.default) {    const { default: dft } = opts;    idx = optionList.findIndex(e => dft == e.value);    if (idx == -1)      throw `Default option ${dft} is not included in option list`;  }  console.log(`${color.green('?')} ${opts.message}`);  const printOptions = () => {    for (const [i, opt] of optionList.entries()) {      const selected = idx == i;      const selChar = selected ? '❯' : ' ';      const s = `${selChar} ${opt.label}`;      console.log(selected ? color.green(s) : s);    }  };
  const eraseOptions = async () => {    await print(ansi.eraseLines(len + 1));  };
  await print(ansi.cursorHide());  printOptions();  let ret;  for await (const evt of readKeypress()) {    const { key, ctrlKey } = evt;    if (key == 'down') {      idx = (idx + 1) % len;      await eraseOptions();      printOptions();    } else if (key == 'up') {      idx = (idx - 1 + len) % len;      await eraseOptions();            printOptions();    } else if (key == 'return') {      ret = optionList[idx].value;      break;    } else if (ctrlKey && key === 'c') {      Deno.exit()    }  }
  await eraseOptions();  await print(ansi.cursorShow());  if (ret) return ret;  throw 'Noop';}