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

const parseInputData1 = (data: string): [number, number][] => {
  const lines = data.trim().split("\n").filter(Boolean);
  const [times, distances] = lines
    .map((line) =>
      line
        .split(/:\ +/)[1]
        .split(/\ +/)
        .map(Number)
    );
  return times.map((time, i) => [time, distances[i]]);
};

const solvePart1 = (data: string): number => {
  const races = parseInputData1(data);

  return races
    .map(([time, distance]) =>
      Array.from(new Array(time), (_, i) => i).map((
        t,
      ) => [distance, t * (time - t)])
        .filter(([distance, total]) => total > distance)
    ).map((winingRaces) => winingRaces.length)
    .reduce((s, v) => s * v);
};

console.log("Sample:", solvePart1(sample)); // 286
console.log("Input", solvePart1(input)); // 227850

const parseInputData2 = (data: string): [number, number] => {
  const lines = data.trim().split("\n").filter(Boolean);
  const [time, distance] = lines
    .map((line) =>
      Number(line
        .split(/:\ +/)[1]
        .replace(/\ +/g, ''))
    );
  return [time, distance]
};


const solvePart2 = (data: string): number => {
  const [time, distance] = parseInputData2(data);
  let result = 0;

  for (let t = 0; t < time ; t += 1) {
    const total = t * (time - t)
    if (total > distance) result++
  }

  return result
}

console.log("Sample:", solvePart2(sample)); // 71503
console.log("Input", solvePart2(input)); // 42948149