index.js

#!/usr/bin/env node
// Importamos el módulo en ES6
import promptSync from 'prompt-sync';
const prompt = promptSync();

// Capturamos la entrada del usuario de forma sincrónica
console.log(`
Welcome to the Number Guessing Game!
I'm thinking of a number between 1 and 100.

Please select the difficulty level:
1. Easy (10 chances)
2. Medium (5 chances)
3. Hard (3 chances)
`);

const nivel = prompt("Enter your choice: ");

console.log("");
let maxAttempts;
switch (nivel) {
    case '1':
        console.log('Great! You have selected the Easy difficult level');
        maxAttempts = 10;
        break;
    case '2':
        console.log('Great! You have selected the Medium difficult level');
        maxAttempts = 5;
        break;
    case '3':
        console.log('Great! You have selected the Hard difficult level');
        maxAttempts = 3;
        break;
    default:
        console.log('Invalid choice, defaulting to Medium level');
        maxAttempts = 5;
}

console.log("Let's start the game");
console.log("");

const numeroAleatorio = Math.floor(Math.random() * 100) + 1;
let attempts = 0;
let guessed = false;

while (attempts < maxAttempts && !guessed) {
    const userGuess = parseInt(prompt("Enter your guess: "));
    attempts++;
    
    if (isNaN(userGuess)) {
        console.log("Please enter a valid number.");
        attempts--; // Don't count invalid inputs as attempts
    } else if (userGuess === numeroAleatorio) {
        console.log(`Congratulations! You guessed the correct number in ${attempts} attempts.`);
        guessed = true;
    } else if (userGuess > numeroAleatorio) {
        console.log(`Incorrect! The number is less than ${userGuess}.`);
        console.log(`You have ${maxAttempts - attempts} attempts left.`);
    } else {
        console.log(`Incorrect! The number is greater than ${userGuess}.`);
        console.log(`You have ${maxAttempts - attempts} attempts left.`);
    }
}

if (!guessed) {
    console.log(`Game over! You've used all ${maxAttempts} attempts. The number was ${numeroAleatorio}.`);
}