fifteen version 2

main.js

'use strict'

const readline = require('readline')

const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout
})

function get_random_arbitrary(min, max) {
  return parseInt(Math.random() * (max - min) + min, 10)
}

const swap = (from_x, from_y, to_x, to_y, matrix) => {
	let value = matrix[from_y][from_x]
	matrix[from_y][from_x] = matrix[to_y][to_x]
	matrix[to_y][to_x] = value
	return matrix
}

const print_matrix = (matrix, score) => {
	process.stdout.write("\u001b[2J\u001b[0;0H")
	for(const str_y of matrix){
		console.log(str_y);
	}
	console.log('\n score: ' + score + '\n');
}

const check_matrix = matrix => {
	for(const str_y of matrix){
		for(let i = 0; i < str_y.length - 1; i++){
			if(str_y[i] > str_y[i + 1]){
				return false
			}
		}
	}
	return true
}

let matrix = [[' 2', ' 1', ' 3', ' 4'], [' 5', ' 6', ' 7', ' 8'], [' 9', '10', '11', '12'], ['13', '14', '15', '  ']]
const coordinates = [3, 3]
let score = 0

const move = (command, matrix) =>{
	if((command == 's' || command == 1) && coordinates[0] - 1 >= 0){
		matrix = swap(coordinates[1], coordinates[0], coordinates[1], coordinates[0] - 1, matrix)
		coordinates[0]--
		score++
	} 
	if((command == 'w' || command == 2) && coordinates[0] + 1 <= 3){
		matrix = swap(coordinates[1], coordinates[0], coordinates[1], coordinates[0] + 1, matrix)
		coordinates[0]++
		score++
	} 
	if((command == 'd' || command == 3) && coordinates[1] - 1 >= 0){
		matrix = swap(coordinates[1], coordinates[0], coordinates[1] - 1, coordinates[0], matrix)
		coordinates[1]--
		score++
	} 
	if((command == 'a' || command == 4) && coordinates[1] + 1 <= 3){
		matrix = swap(coordinates[1], coordinates[0], coordinates[1] + 1, coordinates[0] , matrix)
		coordinates[1]++
		score++
	} 
	return matrix
}

const mix_matrix = matrix => {
	let a
	for(let i = 0; i < 100; i++){
		a = get_random_arbitrary(1, 5)
		matrix = move(a, matrix)
	}
	return matrix
}

matrix = mix_matrix(matrix)
score = 0
print_matrix(matrix, score)

rl.on('line', (input) => {
	if(input == 'exit'){
		rl.close()
	}else{
		matrix = move(input, matrix)
	}
	print_matrix(matrix, score)
	if(check_matrix(matrix)){
		console.log('you win');
		rl.close()
	}
})