const input = Deno.readTextFileSync('./input.txt').split('\n');

type OP = 'A' | 'B' | 'C';
type ME = 'X' | 'Y' | 'Z';
type RPC = 0 | 1 | 2;

const signVal: Record<OP | ME, RPC> = {
  A: 0,
  X: 0,
  B: 1,
  Y: 1,
  C: 2,
  Z: 2,
};

function rpcPlay(op: RPC, me: RPC): number {
  if (op === me) return me + 4;
  if (me - op === 1 || me - op === -2) return me + 7;
  return me + 1;
}

function getSign(op: RPC, winType: ME): RPC {
  if (winType === 'Y') return op;
  if (winType === 'X') return ((op + 2) % 3) as RPC;
  return ((op + 1) % 3) as RPC;
}

function calcScore(firstPuzzle = true): number {
  let myScore = 0;
  for (const line of input) {
    if (line === '') continue;
    const [op, me] = line.split(' ') as [OP, ME];
    if (firstPuzzle) myScore += rpcPlay(signVal[op], signVal[me]);
    else {
      const ops = signVal[op];
      myScore += rpcPlay(ops, getSign(ops, me));
    }
  }
  return myScore;
}

console.log('Solution first Puzzle:\t', calcScore());
console.log('Solution second Puzzle:\t', calcScore(false));