import { readFileSync } from 'node:fs';

// const inputArray = readFileSync('sample.txt').toString().split(",");
const inputArray = readFileSync('input.txt').toString().split(",");

// Part One
console.time("part1");
let sum = 0;

for (const element of inputArray) {
  const contents = element.split("-");
  const start = Number.parseInt(contents[0]);
  const end = Number.parseInt(contents[1]);

  for (let sku = start; sku <= end; sku++) {
    const skuString = sku.toString();
    const digits = skuString.length
    if (digits % 2 === 0) {
      if (skuString.slice(0, digits / 2) === skuString.slice(digits / 2)) {
        sum += sku;
      }
    }
  }
}
console.timeEnd("part1");
console.log(sum);


// Part Two

console.time("part2");
let sum2 = 0;
const repeats = [];

for (const element of inputArray) {
  const contents = element.split("-");
  const start = Number.parseInt(contents[0]);
  const end = Number.parseInt(contents[1]);

  for (let sku = start; sku <= end; sku++) {
    const skuString = sku.toString();
    const digits = skuString.length
    const maxRepeatLength = Math.floor(digits / 2);
    for (let repeatLength = 1; repeatLength <= maxRepeatLength; repeatLength++) {
      if (digits % repeatLength === 0) {
        const maxRepeats = digits / repeatLength;
        const repeatPattern = skuString.slice(0, repeatLength);
        const repeatedPattern = repeatPattern.repeat(maxRepeats);
        if (repeatedPattern === skuString) {
          repeats.push(sku);
        }
      }
    }
  }
}

const uniqueRepeats = [...new Set(repeats)];

for (const repeat of uniqueRepeats) {
  sum2 += Number.parseInt(repeat);
}
console.timeEnd("part2");
console.log(sum2);

// functions