adventofcode2022_3

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


// RCMRQjLLWGTjnlnZwwnZJRZH
// qnvfhpSbvSppNddNdSqbbmmdPrwttJVrVPDVrJtHtwPZhrPJ
// BFpFzSSqSFFSvQsnWgCMjTLzng
// DbWVcVRRdlLffvtqjTWNgQ
// mJJMpsmrMrJSHJpsHrFHvBvgHvqfNvzffgTvfj
// mMhPjmjmFPJhMSGGcDRlwRdcLGPc

const data = fs.readFileSync(path.join(__dirname, './input2.txt'), 'utf8');
const alphabet = 'abcdefghijklmnopqrstuvwxyz';
const fullAlphabetArr = `${alphabet}${alphabet.toUpperCase()}`.split('');
const rucksacks = data.split(/\r?\n/);

const game1 = () => {
    let sum = 0;

    rucksacks.forEach((stuff) => {
        const rearrangedItems = [];

        const firstHalfOfCompartmentItems = stuff.slice(0, stuff.length / 2).split('');
        const secondHalfOfCompartmentItems = stuff.slice(stuff.length / 2, stuff.length).split('');

        firstHalfOfCompartmentItems.forEach(item => {
            const isRearrangeRequired = secondHalfOfCompartmentItems.some(secondHalfItem => secondHalfItem === item);
            const isItemAlreadyRearranged = rearrangedItems.find(storedItem => storedItem === item);

            if (isRearrangeRequired && !isItemAlreadyRearranged) {
                rearrangedItems.push(item);
                sum += fullAlphabetArr.findIndex(letter => letter === item) + 1;
            }
        });
    }) 

    return sum;
};

const game2 = () => {
    const groupLimit = 3;
    const groups = [];
    let tempGroup = [];
    let sum = 0;

    rucksacks.forEach((stuff, idx) => {
        if ((idx + 1) % groupLimit === 0) {
            tempGroup.push(stuff);
            groups.push(tempGroup);
            tempGroup = [];
        } else {
            tempGroup.push(stuff);
        }
    });

    groups.forEach(group => {
        const rearrangedItems = [];
        const isItemAlreadyRearranged = (item) => rearrangedItems.some(storedItem => storedItem === item);

        group[0].split('').forEach(item => {
            const findMatch = (itemsList) => itemsList.split('').some(groupItem => groupItem === item);

            if (findMatch(group[1]) && findMatch(group[2]) && !isItemAlreadyRearranged(item)) {
                rearrangedItems.push(item);
                sum += fullAlphabetArr.findIndex(letter => letter === item) + 1;
            }
        })
    })

    return sum;
};

console.log(game1(), 'game1');
console.log(game2(), 'game2');