advent2022/d10/main.js

const fs = require('fs');
const readline = require('readline');

const SCREEN_WIDTH = 40;

function visible(line, reg, allLines) {
    const cursor = line.length;
    line += (cursor === reg -1 || cursor === reg || cursor === reg +1) ? '#' : ' ';
    if (cursor === SCREEN_WIDTH -1) {
        allLines.push(line);
        line = "";
    }
    return line;
}

function doColorize(lines, x, y, color) {
    if (!lines[x] || lines[x][y] !== true)
        return;
    lines[x][y] = color;
    doColorize(lines, x -1, y, color);
    doColorize(lines, x +1, y, color);
    doColorize(lines, x -1, y -1, color);
    doColorize(lines, x +1, y -1, color);
    doColorize(lines, x -1, y +1, color);
    doColorize(lines, x +1, y +1, color);
    doColorize(lines, x, y -1, color);
    doColorize(lines, x, y +1, color);
}

function colorize(lines) {
    const colors = [ '\033[31m', '\033[32m', '\033[33m', '\033[34m', '\033[35m', '\033[36m' ];
    let colorIndex = 0;
    for (let i =0; i < lines.length; ++i)
        for (let j =0; j < lines[i].length; ++j)
            if (lines[i][j] === true) {
                doColorize(lines, i, j, colors[colorIndex % colors.length] +'#');
                ++colorIndex;
            }
}

async function main() {
    let currentTick = 1;
    let register = 1;
    let sum = 0;
    let data = "";
    let allLines = [];

    for await (let line of readline.createInterface({ input: process.stdin })) {
        let tickInc = 1;
        let prevValue = register;

        if (!line || !line.length)
            continue;
        if (line.startsWith('addx ')) {
            data = visible(data, register, allLines);
            data = visible(data, register, allLines);
            register += parseInt(line.substring(5));
            tickInc = 2;
        } else {
            data = visible(data, register, allLines);
        }
        if ((20+currentTick+tickInc) %40 < tickInc) {
            let currentValue = (20+currentTick+tickInc) %40 === 0 ? register : prevValue;
            sum += ((tickInc+currentTick)-((tickInc+currentTick+20)%40)) * currentValue;
        }
        currentTick += tickInc;
    }
    allLines = allLines.map(i => (i.split('').map(x => x === '#')));
    colorize(allLines);
    allLines.forEach(i => console.log(i.map(i => i || ' ').join('')));
    console.log('\033[39msum: ', sum);
};

(main());