const { Glib, Maps, Sets, Vector, twodee } = require('../../lib');

const parseLine = (input) =>
  Glib.fromSplit(input, ',').map(([direction, ...numchars]) => {
    return new twodee.Instruction(
      twodee.UDLR[direction],
      BigInt(numchars.join('')),
    );
  });

module.exports = {
  '1': (input) =>
    Sets.and(
      ...Glib.fromLines(input).map(
        (line) => twodee.everyStep(parseLine(line)).map((i) => i.string).set,
      ),
    )
      .glib.map((i) => Vector.fromString(i).distance(twodee.ORIGIN))
      .min(),
  2: (input) =>
    Maps.add(
      ...Maps.and(
        ...Glib.fromLines(input).map((line) =>
          twodee
            .everyStep(parseLine(line))
            .map((pt, i) => [pt.string, i + 1])
            .toMap(),
        ),
      ),
    )
      .glibEntries.map(([point, distance]) => distance)
      .min(),
};