// ==UserScript==
// @name         Roblox Server Finder
// @version      1.5
// @description  Finds an empty server for you to join.
// @match        https://www.roblox.com/games/*
// @author       Roblox_Scripter_Tools
// @grant        none
// @namespace https://greasyfork.org/users/902751
// @downloadURL https://update.greasyfork.icu/scripts/443446/Roblox%20Server%20Finder.user.js
// @updateURL https://update.greasyfork.icu/scripts/443446/Roblox%20Server%20Finder.meta.js
// ==/UserScript==

(function () {
  // Gets the game ID
  const gid = Number(window.location.pathname.split("/")[2]);
  if (!gid) return;
  // Gets the game URL
  const url = `https://www.roblox.com/games/${gid}`;

  const searchForGame = function (gid, min, max) {
    // Get the game page
    let page = Math.round((max + min) / 2);
    // Fetch roblox's servers
    fetch(`https://www.roblox.com/games/getgameinstancesjson?placeId=${gid}&startindex=${page}`)
      // Turn the response into JSON
      .then((resp) => resp.json())
      .then(function (data) {
        if (data.Collection.length < 10 && data.Collection.length > 0) {
          let server = data.Collection[data.Collection.length - 1];
          if(server.CurrentPlayers.length == 0) {
            min = page;
            console.log("No people, trying new server:", page);
            searchForGame(gid, min, max);
            return false;
          }
          console.log(
            "Found empty server:",
            server,
            "\nCurrent Total Players:",
            server.CurrentPlayers.length
          );
          if (
            confirm(
              "Found server with " +
                server.CurrentPlayers.length +
                " players.\nWould you like to join this server?"
            )
          ) {
            try {
              eval(server.JoinScript);
            } catch (e) {
              console.log("Error:", e);
            }
          } else {
            min = page;
            console.log("User canceled, trying new server:", page);
            searchForGame(gid, min, max);
            return false;
          }
          return true;
        } else if (data.Collection.length == 0) {
          max = page;
          console.log("Page empty, trying new page:", page);
          searchForGame(gid, min, max);
        } else {
          min = page;
          console.log("Not empty, trying new server:", page);
          searchForGame(gid, min, max);
        }
      });
  };

  let h3ader = document.createElement("h3");
  h3ader.innerHTML = "Empty Server Tool";

  let btn = document.createElement("span");
  btn.id = "-ServerTool-findServer";
  btn.onclick = function () {
    searchForGame(gid, 0, 10000);
  };
  btn.innerHTML = "Join Empty Server";
  btn.className = "btn-secondary-md";

  document.getElementById("game-instances").prepend(btn);
  document.getElementById("game-instances").prepend(h3ader);
})();