const express = require('express');
const axios = require('axios');

const app = express();

app.get("/", function(req, res) {
  const base = "http://npst.no/api/🙃.js?commands=";
  const commands = ["✨", "⚡", "🔑", "🤷"];
  let go = true;
  for (let i = 1; i <= 6; i++) {
    if (go) {
      const comb = getCombos(commands, i);
      comb.forEach(combination => {
        const url = `${base}${combination}`.replace(/,/g, "");
        axios
          .get(encodeURI(url))
          .then(res => {
            if (res.data && !res.data.error && res.data.message) {
              if (res.data.message.includes("PST")) {
                go = false;
                console.log(res.data.message);
              }
            }
          })
          .catch(error => {
            if (error.data && res.data.message) {
              console.log(error.data.message);
            }
          });
      });
    }
  }
});

app.listen(80);

function getCombos(arr, len) {
  const base = arr.length;
  const counter = Array(len).fill(base === 1 ? arr[0] : 0);
  if (base === 1) return [counter];
  const combos = [];
  const increment = i => {
    if (counter[i] === base - 1) {
      counter[i] = 0;
      increment(i - 1);
    } else {
      counter[i]++;
    }
  };

  for (let i = base ** len; i--; ) {
    const combo = [];
    for (let j = 0; j < counter.length; j++) {
      combo.push(arr[counter[j]]);
    }
    combos.push(combo);
    increment(counter.length - 1);
  }

  return combos;
}