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

const COMMANDS = {
  TURN_ON: Symbol('TURN_ON'),
  TURN_OFF: Symbol('TURN_OFF'),
  TOGGLE: Symbol('TOGGLE'),
};

const cmd = new Map([
  ['turn on', COMMANDS.TURN_ON],
  ['turn off', COMMANDS.TURN_OFF],
  ['toggle', COMMANDS.TOGGLE],
]);

const parse = (input) =>
  Glib.fromLines(input).map((l) => {
    const [
      str,
      command,
      pt1,
      pt2,
    ] = /^([^\d]+)(\d+,\d+) through (\d+,\d+)$/.exec(l);

    return [
      cmd.get(command.trim()),
      twodee.Rectangle.fromPoints(
        Vector.fromString(`(${pt1})`),
        Vector.fromString(`(${pt2})`),
      ),
    ];
  });

const ops1 = {
  [COMMANDS.TURN_ON](map, pt) {
    map.set(pt, 1n);
  },
  [COMMANDS.TURN_OFF](map, pt) {
    map.set(pt, 0n);
  },
  [COMMANDS.TOGGLE](map, pt) {
    map.update(pt, (v = 0n) => (v === 0n ? 1n : 0n));
  },
};

const ops2 = {
  [COMMANDS.TURN_ON](map, pt) {
    map.update(pt, (v = 0n) => v + 1n);
  },
  [COMMANDS.TURN_OFF](map, pt) {
    map.update(pt, (v = 0n) => (v <= 1n ? 0n : v - 1n));
  },
  [COMMANDS.TOGGLE](map, pt) {
    map.update(pt, (v = 0n) => v + 2n);
  },
};

module.exports = {
  '1': (input) =>
    parse(input)
      .reduce((acc, [cmd, rect]) => {
        // console.log(cmd, pt1.string, pt2.string);
        rect.allPoints().forEach((pt) => ops1[cmd](acc, pt.string));
        return acc;
      }, new Map())
      .glibValues.sum(),
  '2': (input) =>
    parse(input)
      .reduce((acc, [cmd, rect]) => {
        // console.log(cmd, pt1.string, pt2.string);
        rect.allPoints().forEach((pt) => ops2[cmd](acc, pt.string));
        return acc;
      }, new Map())
      .glibValues.sum(),
};