const sample = await Deno.readTextFile("sample.txt");
const input = await Deno.readTextFile("input.txt");

type Object = "rock" | "paper" | "scissor";
type Outcome = "LOST" | "DRAW" | "WIN";

const scores: Record<Outcome, number> = {
  LOST: 0,
  DRAW: 3,
  WIN: 6,
} as const;

const objectValues: Record<Object, number> = {
  rock: 1,
  paper: 2,
  scissor: 3,
} as const;

const objectsWinFrom: Record<Object, Object> = {
  rock: "scissor",
  paper: "rock",
  scissor: "paper",
} as const;

const codesToObjects: Record<string, Object> = {
  A: "rock",
  B: "paper",
  C: "scissor",
  X: "rock",
  Y: "paper",
  Z: "scissor",
} as const;

const codesToOutcome: Record<string, Outcome> = {
  X: "LOST",
  Y: "DRAW",
  Z: "WIN",
} as const;

const solvePart1 = (data: string): number | undefined =>
  data
    .split("\n")
    .filter(Boolean)
    .map((line) => line.split(" ").map((code) => codesToObjects[code]))
    .map(([object1, object2]) => {
      if (object2 === object1) {
        return scores.DRAW + objectValues[object2];
      }
      if (objectsWinFrom[object2] === object1) {
        return scores.WIN + objectValues[object2];
      }
      return scores.LOST + objectValues[object2];
    })
    .reduce((sum, value) => sum + value, 0);

console.log("Sample:", solvePart1(sample));
console.log("Input", solvePart1(input));

const solvePart2 = (data: string): number | undefined =>
  data
    .split("\n")
    .filter(Boolean)
    .map((line): [Object, Outcome] => {
      const [objectCode, outcomeCode] = line.split(" ");
      return [codesToObjects[objectCode], codesToOutcome[outcomeCode]];
    })
    .map(([object1, outcome]) => {
      if (outcome === "DRAW") {
        return scores.DRAW + objectValues[object1];
      }
      if (outcome === "LOST") {
        return scores.LOST + objectValues[objectsWinFrom[object1]];
      }
      return scores.WIN + objectValues[objectsWinFrom[objectsWinFrom[object1]]];
    })
    .reduce((sum, value) => sum + value, 0);

console.log("Sample:", solvePart2(sample));
console.log("Input", solvePart2(input));