const { readInput } = require("./util");

const { lines } = readInput("input");

class Buffer {
  constructor(size = 25) {
    this.buffer = [];
    this.size = size;
  }

  push(val) {
    this.buffer.push(val);
    if (this.buffer.length > this.size) {
      this.buffer.shift();
    }
  }

  isValid(val) {
    if (this.buffer.length < this.size) {
      return true;
    }
    for (let a = 0; a < this.buffer.length; a++) {
      const wanted = val - this.buffer[a];
      for (let b = a + 1; b < this.buffer.length; b++) {
        if (this.buffer[b] === wanted) {
          return true;
        }
      }
    }
    return false;
  }
}

let weakness = null;
const buffer = new Buffer(25);
for (const line of lines) {
  const val = parseInt(line);
  // console.log(buffer.buffer, val, buffer.isValid(val));
  if (!buffer.isValid(val)) {
    weakness = val;
    break;
  }
  buffer.push(parseInt(line));
}

const stream = lines.map((line) => parseInt(line));

let lower = 0;
let upper = 0;
let sum = stream[0];

while (sum !== weakness && lower < stream.length) {
  while (sum > weakness) {
    sum -= stream[upper];
    upper--;
  }
  while (sum < weakness) {
    upper++;
    sum += stream[upper];
  }
  sum -= stream[lower];
  lower++;
}

const range = stream.slice(lower, upper + 1);
const [min, max] = [Math.min(...range), Math.max(...range)];
console.log({ lower, upper, range, min, max });

console.log("Solution:");
console.log(min + max);