import chalk from 'chalk';
import Vorpal from 'vorpal';
import readline from 'readline';

const vorpal = Vorpal();

const op = {
  message: '上传/1,演示/3',
  time: 5,
  list: [
    {
      name: '上传',
      value: 'y',
      result: '上传',
    },
    {
      name: '取消-什么也不做',
      value: '',
      result: '已取消',
    },
    {
      name: '演示-演示一下有哪些文件会上传，但不会真的上传',
      value: 'd',
      result: '演示',
    },
  ],
  com: false,
  onIndex: 1,
};

/**
 *  监听命令行的键盘事件
 */
readline.emitKeypressEvents(process.stdin);
process.stdin.setRawMode(true);
process.stdin.on('keypress', (str, key) => {
  let keyName = key.name;
  switch (keyName) {
    case 'up':
      op.onIndex--;
      op.onIndex < 0 && (op.onIndex = op.list.length - 1);
      break;
    case 'down':
      op.onIndex++;
      op.onIndex > op.list.length - 1 && (op.onIndex = 0);
      break;
    case 'return':
      com();
      break;
  }
  redraw();
});

/**
 * com
 */
function com() {
  op.com = true;
  setTimeout(() => {
    process.send(op.list[op.onIndex].value);
  }, 0);
}

/** 计时器 */
function timeT() {
  redraw();
  op.time--;
  if (op.time < 0) {
    com();
    redraw();
  } else {
    setTimeout(() => {
      timeT();
    }, 1000);
  }
}

timeT();

/**
 * 绘制
 */
function redraw() {
  if (op.com) {
    let strs = [
      chalk.bold(`${op.message} `),
      chalk.greenBright(op.list[op.onIndex].result),
    ];
    vorpal.ui.redraw(strs.join(''));
  } else {
    let strs = [
      chalk.green('? ') + chalk.bold(`${op.message} ${op.time}秒后自动确定:`),
      ...op.list.map((_, i) => {
        if (i == op.onIndex) {
          return chalk.blueBright(` ${i + 1}) ` + _.name);
        } else {
          return chalk.gray(` ${i + 1}) ` + _.name);
        }
      }),
    ];
    vorpal.ui.redraw(strs.join('\n'));
  }
}