const fs = require("fs");

const inputFileName = "input";

async function main() {
  const input = await fs.promises.readFile(inputFileName, "utf-8");

  const machine = input.split(",").map((code) => parseInt(code));
  machine[1] = 12;
  machine[2] = 2;
  console.log(machine);

  let curIdx = 0;
  let opCode = machine[curIdx];
  while (opCode !== 99) {
    const val1 = machine[machine[curIdx + 1]];
    const val2 = machine[machine[curIdx + 2]];
    const register = machine[curIdx + 3];
    console.log(opCode, val1, val2, register);
    if (opCode === 1) {
      machine[register] = val1 + val2;
    } else if (opCode === 2) {
      machine[register] = val1 * val2;
    } else {
      throw Error("invalid opcode");
    }

    curIdx += 4;
    opCode = machine[curIdx];
  }
  console.log(machine);
  console.log(machine[0]);
}

main();