import * as R from "remeda";
import { isLessThan } from "./part1";

const dividers = [[[2]],[[6]]];
export default R.createPipe(
    R.flatten,
    R.concat(dividers),
    (packets) => packets.sort(isLessThan),
    packets => packets.map( (p,i) => ({ i: i+1, divider: dividers.includes(p) }) ),
    R.filter( ({divider}) => divider ),
    R.map(R.prop('i')),
    (v) => v.reduce((a,b)=>a*b),
);