#!/usr/bin/env node

const yargs = require('yargs');

const moment = require('moment');

const argv = yargs

.usage('Usage: $0 <date_string>')

.demandCommand(1, 'Please provide a date string.')

.help()

.alias('h', 'help')

.argv;

function validateDate(dateString) {

// Attempt to parse the date string with various formats

const parsedDate = moment(dateString, 'YYYY-MM-DD HH:mm:ss | YYYY-MM-DD | MM/DD/YYYY | MM/DD/YY | DD/MM/YYYY | DD/MM/YY | YYYY', true);

if (!parsedDate.isValid()) {

return false; // Date is invalid

}

return true; // Date is valid

}

function main() {

const dateString = argv._[0];

if (!validateDate(dateString)) {

console.error('Error: Invalid date format.');

process.exit(1);

}

// Example: Show date in different formats

console.log(`Original Date: ${dateString}`);

console.log(`Formatted (YYYY-MM-DD): ${moment(dateString, 'YYYY-MM-DD').format('YYYY-MM-DD')}`);

console.log(`Formatted (MM/DD/YYYY): ${moment(dateString, 'MM/DD/YYYY').format('MM/DD/YYYY')}`);

console.log(`Formatted (DD/MM/YYYY): ${moment(dateString, 'DD/MM/YYYY').format('DD/MM/YYYY')}`);

console.log(`Formatted (HH:mm:ss): ${moment(dateString, 'HH:mm:ss').format('HH:mm:ss')}`);

console.log(`Formatted (YYYY-MM-DD HH:mm): ${moment(dateString, 'YYYY-MM-DD HH:mm').format('YYYY-MM-DD HH:mm')}`);

}

main();