adventofcode2022/day2/solution.ts

import { readFileSync } from 'fs';
import { join } from 'path';

enum GameStatus {
  Win = 1,
  Lose,
  Draw,
}


function didIWinRound(oppoMove: string, myMove: string): GameStatus {
  if (oppoMove == 'A') {
    if (myMove == 'X') {
      return GameStatus.Draw
    }
    if (myMove == 'Y') {
      return GameStatus.Win
    }
    if (myMove == 'Z') {
      return GameStatus.Lose
    }
  }

  if (oppoMove == 'B') {
    if (myMove == 'X') {
      return GameStatus.Lose
    }
    if (myMove == 'Y') {
      return GameStatus.Draw
    }
    if (myMove == 'Z') {
      return GameStatus.Win
    }
  }

  if (oppoMove == 'C') {
    if (myMove == 'X') {
      return GameStatus.Win
    }
    if (myMove == 'Y') {
      return GameStatus.Lose
    }
    if (myMove == 'Z') {
      return GameStatus.Draw
    }
  }

  return GameStatus.Lose;
}

function didIWinRoundPtTwo(opMove: string, myMove: string): {status:GameStatus, move:string} {
  if (myMove == 'Z') { // Win
    if (opMove == 'A') { // Rock
      return {status:GameStatus.Win, move:"Y"}; // Paper
    }
    if (opMove == 'B') { // Paper
      return {status:GameStatus.Win, move:"Z"}; // Sissors
    }
    if (opMove == 'C') { // Sissors
      return {status:GameStatus.Win, move:"X"}; // Rock
    }
  }

  if (myMove == 'Y') { // Draw
    if (opMove == 'A') { // Rock
      return {status:GameStatus.Draw, move:"X"}; // Rock
    }
    if (opMove == 'B') { // Paper
      return {status:GameStatus.Draw, move:"Y"}; // Paper
    }
    if (opMove == 'C') { // Sissors
      return {status:GameStatus.Draw, move:"Z"}; // Sissors
    }
  }

  if (myMove == 'X') { // Lose
    if (opMove == 'A') { // R
      return {status:GameStatus.Lose, move:"Z"}; // S
    }
    if (opMove == 'B') { // P
      return {status:GameStatus.Lose, move:"X"}; // R
    }
    if (opMove == 'C') { // S
      return {status:GameStatus.Lose, move:"Y"}; // P
    }
  }
}

let pointsLookup = {};
pointsLookup["A"] = 1;
pointsLookup["X"] = 1;
pointsLookup["B"] = 2;
pointsLookup["Y"] = 2;
pointsLookup["C"] = 3;
pointsLookup["Z"] = 3;

const fileString = readFileSync(join(__dirname, "input"), 'utf-8');
const rounds = fileString.split("\n");

var totalScore: number = 0;
var totalScoreTwo: number = 0;

for (const round of rounds){
  const moves = round.split(" ");
  if (moves.length != 2) {
    continue;
  }

  const opScore = pointsLookup[moves[0]];
  const myScore = pointsLookup[moves[1]];

  var roundScore: number = 0;
  const win = didIWinRound(moves[0], moves[1]);
  roundScore += myScore;
  if (win == GameStatus.Win) {
    roundScore += 6;
  } else if (win == GameStatus.Draw) {
    roundScore += 3;
  }
  totalScore += roundScore;


  var roundScorePt2: number = 0;
  const {status, move} = didIWinRoundPtTwo(moves[0], moves[1]);
  const myScorePt2 = pointsLookup[move];
  roundScorePt2 += myScorePt2;
  if (status == GameStatus.Win) {
    roundScorePt2 += 6;
  } else if (status == GameStatus.Draw) {
    roundScorePt2 += 3;
  }
  totalScoreTwo += roundScorePt2;


}

console.log(totalScore);
console.log(totalScoreTwo);