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


const fileString = readFileSync(join(__dirname, "input"), 'utf-8');
var rows = fileString.split("Monkey ");

rows = rows.map(val => {
  return val.trim();
});
rows = rows.filter(val => {
  return val.length > 0;
});

var mdata = rows.map(val => {
  return val.split("\n").map(vval => {
    return vval.trim();
  }).filter(vval => {
    return vval.length >0;
  });
})

var monkeys = {}

for (const monkey of mdata) {
  const monkeyName = +monkey[0].split(":")[0].trim();
  const items = monkey[1].split(":")[1].trim().split(",").map(val => {
    return BigInt(+val);
  });
  const op = monkey[2].split(":")[1].trim().split("=")[1].trim();
  const divisTest = +monkey[3].split("by ")[1].trim();
  const trueTarget = +monkey[4].split("monkey ")[1].trim();
  const falseTarget = +monkey[5].split("monkey ")[1].trim();
  monkeys[monkeyName] = {};

  monkeys[monkeyName]['items'] = items;
  monkeys[monkeyName]['operation'] = op;
  monkeys[monkeyName]['test'] = BigInt(divisTest);
  monkeys[monkeyName]['trueTarget'] = trueTarget;
  monkeys[monkeyName]['falseTarget'] = falseTarget;
  monkeys[monkeyName]['inspections'] = BigInt(0);
}

console.log(monkeys);

const ROUNDS = 10000;

var lcms = [];
for (const m in monkeys) {
    lcms.push(monkeys[m]['test']);
}

const lcm = BigInt(lcms.reduce((a, b) => {
  return a * b;
}));

for (var i = 0; i < ROUNDS; i++) {
  for (const m in monkeys) {
    const monkey = monkeys[m];
    const ilen = monkey['items'].length;
    for (var j = 0; j < ilen; j++) {
      var item = BigInt(monkey['items'].shift());

      var opstr = monkey['operation'].replace(/old/gi, item);
      var opitms = opstr.split(" ");
      opitms[0] = "BigInt(" + opitms[0] + ")";
      opitms[2] = "BigInt(" + opitms[2] + ")";
      opstr = opitms.join(" ");

      item = BigInt(eval(opstr)) % lcm;
      if ((item % monkey['test']) == BigInt(0)) {
        monkeys[monkey['trueTarget']]['items'].push(item);
      } else {
        monkeys[monkey['falseTarget']]['items'].push(item);
      }
      monkey['inspections'] += BigInt(1);
    }
  }
}

console.log(monkeys);

var insCount = [];
for (const m in monkeys) {
    insCount.push(monkeys[m]['inspections']);
}
console.log(insCount);
insCount = insCount.sort().slice(insCount.length - 2);
console.log(insCount);

console.log(insCount.reduce((a, b) => {
  return a * b;
}));