const fs = require('fs');

// const inputArray = fs.readFileSync('sample.txt').toString().split("\n");
let inputArray = fs.readFileSync('input.txt').toString().split("\n");
let allInts = [];
let sum = 0;

// Part One

for (i in inputArray) {
  const forwards = inputArray[i];
  const backwards = inputArray[i].split("").reverse().join("");
  let firstInt;
  let lastInt;
  for (j in forwards) {
    if (parseInt(forwards[j])) {
      firstInt = parseInt(forwards[j]);
      break;
    }
  }
  for (j in backwards) {
    if (parseInt(backwards[j])) {
      lastInt = parseInt(backwards[j]);
      break;
    }
  }
  allInts.push(parseInt(`${firstInt}${lastInt}`));
}

sum = allInts.reduce((a, b) => a + b, 0);

console.log(sum);


// Part Two

// inputArray = fs.readFileSync('sample2.txt').toString().split("\n");
allInts = [];

for (i in inputArray) {
  let forwards = inputArray[i];
  let needsParsed = true;
  while (needsParsed) {
    for (j in forwards) {
      if (forwards[j] === "o" && forwards.substring(j,parseInt(parseInt(j)+parseInt(3))) === "one") {
        forwards = forwards.substring(0, j) + "1" + forwards.substring(parseInt(parseInt(j)+parseInt(1)));
        break;
      } else if (forwards[j] === "t" && forwards.substring(j,parseInt(parseInt(j)+parseInt(3))) === "two") {
        forwards = forwards.substring(0, j) + "2" + forwards.substring(parseInt(parseInt(j)+parseInt(1)));
        break;
      } else if (forwards[j] === "t" && forwards.substring(j,parseInt(parseInt(j)+parseInt(5))) === "three") {
        forwards = forwards.substring(0, j) + "3" + forwards.substring(parseInt(parseInt(j)+parseInt(1)));
        break;
      } else if (forwards[j] === "f" && forwards.substring(j,parseInt(parseInt(j)+parseInt(4))) === "four") {
        forwards = forwards.substring(0, j) + "4" + forwards.substring(parseInt(parseInt(j)+parseInt(1)));
        break;
      } else if (forwards[j] === "f" && forwards.substring(j,parseInt(parseInt(j)+parseInt(4))) === "five") {
        forwards = forwards.substring(0, j) + "5" + forwards.substring(parseInt(parseInt(j)+parseInt(1)));
        break;
      } else if (forwards[j] === "s" && forwards.substring(j,parseInt(parseInt(j)+parseInt(3))) === "six") {
        forwards = forwards.substring(0, j) + "6" + forwards.substring(parseInt(parseInt(j)+parseInt(1)));
        break;
      } else if (forwards[j] === "s" && forwards.substring(j,parseInt(parseInt(j)+parseInt(5))) === "seven") {
        forwards = forwards.substring(0, j) + "7" + forwards.substring(parseInt(parseInt(j)+parseInt(1)));
        break;
      } else if (forwards[j] === "e" && forwards.substring(j,parseInt(parseInt(j)+parseInt(5))) === "eight") {
        forwards = forwards.substring(0, j) + "8" + forwards.substring(parseInt(parseInt(j)+parseInt(1)));
        break;
      } else if (forwards[j] === "n" && forwards.substring(j,parseInt(parseInt(j)+parseInt(4))) === "nine") {
        forwards = forwards.substring(0, j) + "9" + forwards.substring(parseInt(parseInt(j)+parseInt(1)));
        break;
      } else if (parseInt(j) === forwards.length - 1) {
        needsParsed = false;
      }
    }
  }

  backwards = forwards.split("").reverse().join("");

  let firstInt;
  let lastInt;
  for (j in forwards) {
    if (parseInt(forwards[j])) {
      firstInt = parseInt(forwards[j]);
      break;
    }
  }
  for (j in backwards) {
    if (parseInt(backwards[j])) {
      lastInt = parseInt(backwards[j]);
      break;
    }
  }
  allInts.push(parseInt(`${firstInt}${lastInt}`));
}

sum = allInts.reduce((a, b) => a + b, 0);

console.log(sum);

// functions