aoc23-07.mts

import { Advent, f, fm, chr, ord } from "advent";
import { Set, Map } from "immutable";

const { compute, computeCheck } = await Advent({ day: 7 });

compute(2, async (input) => {
	let data = input.parse(f.nl(f.dis(" ", f.str(), f.int(), (l, r) => [l, r]))) as [string, number][];

	data = data.sort(([a], [b]) => compare(a, b));
	console.log(data);
	let ans = 0;

	for (let i = 0; i < data.length; i++) {
		ans += (i + 1) * data[i][1];
	}

	return ans;
});

const cards = ["J", "2", "3", "4", "5", "6", "7", "8", "9", "T", "Q" , "K", "A"];

function compare(a: string, b: string) {
	let aLevel = level(a);
	let bLevel = level(b);

	if (aLevel !== bLevel) {
		return aLevel - bLevel;
	}

	for (let i = 0; i < a.length; i++) {
		let aInd = cards.indexOf(a[i]);
		let bInd = cards.indexOf(b[i]);

		if (aInd !== bInd) {
			return aInd - bInd;
		}
	}

	return 0;
}

function level(a: string) {
	let counts = Map<string, number>();

	for (const c of a) {
		counts = counts.set(c, (counts.get(c) ?? 0) + 1);
	}
	let jCount = counts.get("J") ?? 0;
	counts = counts.delete("J");

	const keys = counts.keySeq().sort((a, b) => counts.get(b)! - counts.get(a)!).toArray();

	if (counts.get(keys[0], 0) + jCount === 5) {
		return 6;
	} else if (counts.get(keys[0], 0) + jCount === 4) {
		return 5;
	} else if (counts.get(keys[0], 0) + jCount=== 3 && counts.get(keys[1]) === 2) {
		return 4;
	} else if (counts.get(keys[0], 0) + jCount === 3) {
		return 3;
	} else if (counts.get(keys[0], 0) + jCount === 2 && counts.get(keys[1]) === 2) {
		return 2;
	} else if (counts.get(keys[0], 0) + jCount === 2) {
		return 1;
	} else {
		return 0;
	}
}