adventofcode2022/02/code.js

const fs = require('fs');

const inputArray = fs.readFileSync('input.txt').toString().split("\n");

// Part One
let totalScore = 0;

for (i in inputArray) {
  const value = (inputArray[i]);
  const throws = value.split(" ");
  const result = getResult(throws[0], throws[1]);
  const score = getScore(result, throws[1]);
  totalScore += score;
}

console.log(totalScore);


// Part Two

totalScore = 0;

for (i in inputArray) {
  const value = (inputArray[i]);
  const throws = value.split(" ");
  const result = getThrownResult(throws[1]);
  const thrownThrow = getThrownThrow(throws[0], throws[1]);
  const score = result + thrownThrow;
  totalScore += score;
}

console.log(totalScore);



// functions

function getResult(them, me) {
  let result;

  if (them === "A") {
    if (me === "X") {
      result = 1;
    } else {
      result = me === "Y" ? 2 : 0;
    }
  }
  if (them === "B") {
    if (me === "Y") {
      result = 1;
    } else {
      result = me === "Z" ? 2 : 0;
    }
  }
  if (them === "C") {
    if (me === "Z") {
      result = 1;
    } else {
      result = me === "X" ? 2 : 0;
    }
  }
  return result * 3;
}

function getScore(result, me) {
  const options = ["X", "Y", "Z"];
  const value = options.indexOf(me) + 1;
  return value + result;
}

function getThrownResult(thrown) {
  const results =  ["X", "Y", "Z"];
  return results.indexOf(thrown) * 3;
}

function getThrownThrow(them, me) {
  let result;

  if (them === "A") {
    if (me === "Y") {
      result = 1;
    } else {
      result = me === "X" ? 3 : 2;
    }
  }
  if (them === "B") {
    if (me === "Y") {
      result = 2;
    } else {
      result = me === "X" ? 1 : 3;
    }
  }
  if (them === "C") {
    if (me === "Y") {
      result = 3;
    } else {
      result = me === "X" ? 2 : 1;
    }
  }
  return result;
}