adventofcode/2022/16/part2.js

import { bidirectional } from 'graphology-shortest-path';
import * as R from "remeda";
import u from 'updeep';

import { buildGraph } from './part1.js';

const findMaxSteam = (tunnels,graph) => (minutesLeft, unopened, opened, activeSteam, peeps ) => {
    if (minutesLeft <= 0) return 0;

    if (unopened.length === 0) return minutesLeft * activeSteam;

    const next = R.first( R.sortBy(peeps, R.prop('eta')));

    if( next.eta >)




}

function finalSteam(tunnels, graph, minutesLeft, possibilities, locations, activeSteam = 0) {



    const nextToGo = locations.filter(([time]) => !time);

    for( const l of locations) {
        if( l[0] === 0 ) {
            activeSteam += l[2];
            l[2] = 0;
        }
    }


    let scores = [];

    for ( const ntg of nextToGo ) {

    for ( const next of possibilities ) {
        const path = bidirectional(graph, ntg[1], next);
        
    //console.log(path);
        
    const locs = locations.map( x => x === ntg ? [
        path.length, next, tunnels[next].flow
    ] : x );

    let time = Math.min( ...locs.map( ([time]) => time ) );

    if (time >= minutesLeft) {
        //console.log(minutesLeft, activeSteam, locations, possibilities);
            scores.push( minutesLeft * activeSteam );
    }
    else {
        //console.log({totalSteam, time, activeSteam});
        let ts = time * activeSteam;

        scores.push(
                ts + finalSteam(
                    tunnels, graph, minutesLeft - time,
                    possibilities.filter( x => x !== next ),
                    locs.map( ([t,dest,s] ) => [ t -time, dest,s ]),
                    activeSteam
                )
        )
    }

    }
            }

    return Math.max( ...scores );
}

export default (tunnels) => {

    const possibilities = 
        Object.keys(tunnels).filter(
            k => tunnels[k].flow
        );

    const graph = buildGraph(tunnels);

    return  finalSteam(tunnels, graph, 26, possibilities, [
        [ 0, 'AA',0 ],
        [ 0, 'AA',0 ]
    ], 0, 0)

};