const sample = await Deno.readTextFile("sample.txt");
const input = await Deno.readTextFile("input.txt");

const solvePart1 = (data: string): number =>
  data.split("\n").filter(Boolean).map((line) =>
    line.split(/:\ +/)[1]?.split(/\ +\|\ +/).map((parts) =>
      parts.split(/\ +/).map(Number)
    )
  )
    .map(([winning, yours]) => yours.filter((n) => winning.includes(n)))
    .map((matches) => matches.reduce((a, _, i) => i === 0 ? 1 : a * 2, 0))
    .reduce((s, v) => s + v, 0);

console.log("Sample:", solvePart1(sample)); // 13
console.log("Input", solvePart1(input)); // 22488

const solvePart2 = (data: string): number => {
  const x = data
    .split("\n")
    .filter(Boolean)
    .map((line) =>
      line
        .split(/:\ +/)[1]
        ?.split(/\ +\|\ +/)
        .map((parts) => parts.split(/\ +/).map(Number))
    )
    .map(([winning, yours]) => yours.filter((n) => winning.includes(n)))
    .map((matches, index) => [index + 1, matches.length])
    .reduce((r, [i, l]) => {
      r[i] = r[i] || 1
      for (let j = i + 1; j < i + l + 1; j += 1) {
        r[j] = (r[j] ?? 1) + (1 * (r[i] ?? 1));
      }
      return r;
    }, { "1": 1 } as Record<number, number>);

  return Object.values(x).reduce((s, v) => s + v);
};

console.log("Sample2:", solvePart2(sample)); // 30
console.log("Input", solvePart2(input)); // 7013204